Data as of Nov 7, 2026
81.23.48.0/20
4 residential-proxy exits · 30 daysASK4 Limited
Residential-proxy exits
Proxy exits
4
0.10% of its addresses · 30 days
Spread
3 of 16
/24s with at least one exit
Providers
17
selling exits here
Oct 8, 2026 – Nov 6, 2026
Exits seen per day
40 observations
/24s with the most always-on exits
| /24 | Always-on exits | Proxy exits | |
|---|---|---|---|
| 81.23.54.0/24 | 0 | 2 | |
| 81.23.58.0/24 | 0 | 1 | |
| 81.23.61.0/24 | 0 | 1 |
Proxy providers listing exits
- AnyIP
- BirdProxies
- Byteful
- FastProxy
- FloppyData
- GSocks
- Geonix
- Infatica
- LemonLabs
- MangoProxy
- NodeProxy
- NovaProxy
- Proxy-Seller
- Proxyma
- RainProxy
- Shifter
- VitalExclusive
Registrations in this block
The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 81.23.48.0/20 | 4,096 | UK-ASK4INTERNET-20060214 | ASK4 Limited (ORG-AL47-RIPE) · GB | ALLOCATED PA | Feb 14, 2006 | abuse@ |
| └ 81.23.48.0/29 | 8 | ASK4-ROUTING-GATEWAYS | Opal Wilmslow Park | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.48.8/29 | 8 | ASK4-ROUTING-GATEWAYS | Liberty Liverpool Prospect Point | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.48.16/28 | 16 | ASK4-ROUTING-CORE | Backbone: Sheffield to London Direct | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.48.32/28 | 16 | ASK4-ROUTING-CORE | Backbone: Manchester to London Direct | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.48.48/28 | 16 | ASK4-ROUTING-CORE | Backbone: Manchester to London (via Sheffield) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.48.64/27 | 32 | ASK4-ROUTING-GATEWAYS | Manchester Gateways (Kingston Just Cat5) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.48.96/27 | 32 | ASK4-ROUTING-CORE | Manchester Gateways (Kingston Telecity-150-1) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.48.128/26 | 64 | ASK4-SERVERS | Manchester Servers | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.48.192/28 | 16 | ASK4-ROUTING-CORE | Backbone: Manchester to London (via Birmingham) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.48.208/29 | 8 | ASK4-ROUTING-GATEWAYS | Liberty Liverpool Atlantic Point | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.48.216/29 | 8 | ASK4-ROUTING-GATEWAYS | Opal Court Liverpool | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.48.224/28 | 16 | ASK4-ROUTING-CORE | Backbone: London to Birmingham | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.48.240/28 | 16 | ASK4-ROUTING-CORE | Backbone Router IDs | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.0/30 | 4 | ASK4-CUST-MANSIONGROUP | Beaver Bank (Logie Green) Edinburgh Staff | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.4/30 | 4 | ASK4-CUST-LIBERTY | Liberty Living Coventry Park Staff Router Linknet | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.8/29 | 8 | ASK4-ROUTING-GATEWAYS | CRM Gallery Appartments | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.16/28 | 16 | ASK4-ROUTING-GATEWAYS | Opal Leeds One MiniPoP Gateways 2 | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.32/29 | 8 | ASK4-ROUTING-GATEWAYS | Alexander House Leicester | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.40/29 | 8 | ASK4-ROUTING-GATEWAYS | Sangha House Leicester | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.48/31 | 2 | ASK4-LINKNETS | Man-xmr to core1.tcw linknet | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.50/31 | 2 | ASK4-LINKNETS | core1 to edge2.tcw-r1 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.52/31 | 2 | ASK4-LINKNETS | core1.tcw-r1 to core1.tcw-r2 linknet | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.54/31 | 2 | ASK4-LINKNETS | core1 to edge1.tcw-r1 linknet 2 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.56/29 | 8 | ASK4-ROUTING-GATEWAYS | Leighton Hall Preston | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.64/29 | 8 | ASK4-ROUTING-GATEWAYS | CRM Firhill Court | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.72/29 | 8 | ASK4-ROUTING-GATEWAYS | Opal Court Manchester | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.80/31 | 2 | ASK4-LINKNETS | core1.tcw-core1.thn Hibernia Linknet | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.82/31 | 2 | ASK4-LINKNETS | qinq1.tcw-r1 to edge1.tcw-r1 linknet 2 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.88/29 | 8 | ASK4-ROUTING-GATEWAYS | CRM Forster Hall | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.96/28 | 16 | ASK4-BUSI-STANLEYGRANGE | Stanley Grange Customer Range | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.112/31 | 2 | ASK4-LINKNETS | core1 to edge2.tcw-r1 linknet 2 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.116/31 | 2 | ASK4-LINKNETS | core1-r2 to edge1-r2 linknet 2 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.118/31 | 2 | ASK4-LINKNETS | core1.tcw-core1.thn Allegro Linknet | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.120/29 | 8 | ASK4-ROUTING-GATEWAYS | Asha House | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.128/27 | 32 | ASK4-ROUTING-GATEWAYS | Manchester Gateways | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.160/27 | 32 | ASK4-ROUTING-GATEWAYS | Leicester minipop | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.192/27 | 32 | ASK4-ROUTING-GATEWAYS | Manchester Gateways (Telewest Lightening Edge 2) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.49.224/27 | 32 | ASK4-BUSI-OMNIALEIC | Omnia Leicester | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.0/29 | 8 | ASK4-ROUTING-GATEWAYS | Opal Leeds 3 | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.8/29 | 8 | ASK4-ROUTING-GATEWAYS | Opal Leeds 1 | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.16/28 | 16 | ASK4-VOIP | Victoria Hall Newcastle Pattons | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.32/29 | 8 | ASK4-ROUTING-GATEWAYS | Hayes Wharf | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.40/29 | 8 | ASK4-ROUTING-GATEWAYS | Liberty Cardiff Cambrian Point Public | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.48/29 | 8 | ASK4-ROUTING-GATEWAYS | Victoria Hall Manchester - UBS | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.56/29 | 8 | ASK4-CUST-VICTORIAHALL | Victoria Hall Liverpool Peerex Server Range | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.64/29 | 8 | ASK4-CUST-UNIPOL | Unipol Mills St Leeds Staff | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.72/29 | 8 | ASK4-CUST-IQ | IQ Leeds Staff | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.80/29 | 8 | ASK4-ROUTING-GATEWAYS | Oxheys Court | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.88/29 | 8 | ASK4-CUST-OPAL | Opal Nottingham Staff | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.96/29 | 8 | ASK4-LINKNETS | Nf cache Manc | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.104/29 | 8 | ASK4-TESTING | Telecity Manchester Diagnostic Range | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.112/29 | 8 | ASK4-CUST-VICTORIAHALL | Victoria Hall UBS Staff Server Range | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.120/29 | 8 | ASK4-CUST-VICTORIAHALL | Victoria Hall Leicester Staff Servers (Peerex) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.128/29 | 8 | ASK4-ROUTING-GATEWAYS | Algernon Firth | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.136/29 | 8 | ASK4-ROUTING-GATEWAYS | Unipol Leeds - Carlton Hill | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.144/29 | 8 | ASK4-ROUTING-GATEWAYS | Jacks Brow | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.152/30 | 4 | ASK4-ROUTING-CORE | DC1 Edge 1 Linknet 1 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.156/30 | 4 | ASK4-CUST-SELECTPROPERTY | Select Property Head Office | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.160/29 | 8 | ASK4-ROUTING-GATEWAYS | Manchester Gateways (Metronet AQH Q3) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.168/29 | 8 | ASK4-SERVERS | ThousandEyes Manchester Hypervisors | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.176/30 | 4 | ASK4-CUST-LIBERTY | Kier Construction (Liberty Leicester) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.180/30 | 4 | ASK4-LINKNETS | Level3 DC1 to THN Linknet #2 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.184/29 | 8 | ASK4-CUST-IQ | IQ Wave Staff | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.192/28 | 16 | ASK4-BUSI-STANLEYGRANGE | Stanley Estates servers | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.208/28 | 16 | ASK4-BUSI-STANLEYGRANGE | Stanley Grange Customer Range | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.50.224/27 | 32 | ASK4-ROUTING-GATEWAYS | Manchester Gateways (Telewest Lightning Edge 3) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.0/28 | 16 | ASK4-VOIP | Victoria Hall Sheffield SIP Servers | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.16/29 | 8 | ASK4-CUST-QUBA | Quba New Media (A4B) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.24/29 | 8 | ASK4-CUST-HCD | Hadfield Cawkwell Davidson (A4B) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.32/27 | 32 | ASK4-SERVERS | West One Server Range 5 | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.64/26 | 64 | ASK4-OFFICE | Ask4 Office Workstations | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.128/27 | 32 | ASK4-SERVERS | West One Server Range 3 | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.160/27 | 32 | ASK4-SERVERS | Virtual Server Build LAN | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.192/30 | 4 | ASK4-ROUTING-CORE | TCW-VHB Backbone 1 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.196/30 | 4 | ASK4-ROUTING-CORE | THN-UoB Backbone 1 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.200/30 | 4 | ASK4-ROUTING-CORE | UoB to VH Birmingham Backbone | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.204/30 | 4 | ASK4-ROUTING-CORE | Manchester to Birmingham Victoria Hall | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.208/29 | 8 | ASK4-ROUTING-CORE | Sheffield Routers | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.216/29 | 8 | ASK4-ROUTING-CORE | Manchester Routers | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.224/28 | 16 | ASK4-ROUTING-CORE | Backbone: London THE to London THN (VALN 511) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.240/30 | 4 | ASK4-ROUTING-CORE | DC1 to THN (GC) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.244/30 | 4 | ASK4-ROUTING-CORE | Manchester to London IXReach 10G | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.248/30 | 4 | ASK4-ROUTING-CORE | Sheffield to London NWIX 10G | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.51.252/30 | 4 | ASK4-ROUTING-CORE | Manchester to Sheffield NWIX 10G | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.0/26 | 64 | ASK4-SERVERS | West One Ask4 Directly Connected Servers | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.64/30 | 4 | ASK4-ROUTING-GATEWAYS | UoL Conferencing Gateway Linknet | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.68/30 | 4 | ASK4-SERVERS | Office CCTV DVR | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.72/29 | 8 | ASK4-TESTING | Testing suite hypervisors | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.80/28 | 16 | ASK4-ROUTING-GATEWAYS | Test Hall Gateway Routing | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.96/29 | 8 | ASK4-ROUTING-CORE | Customer Router Linker Range | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.104/29 | 8 | ASK4-OFFICE | Ask4 HQ GW Special Use | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.112/29 | 8 | ASK4-ROUTING-GATEWAYS | Upper Parliament Street | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.120/29 | 8 | ASK4-ROUTING-GATEWAYS | Canterbury Student Village | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.128/27 | 32 | ASK4-SERVERS | West One Server Range 2 | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.160/28 | 16 | ASK4-OFFICE | OST Office | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.176/28 | 16 | ASK4-SERVERS | OST West One Servers | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.192/28 | 16 | ASK4-OFFICE | Ask4 Office DMZ | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.208/28 | 16 | ASK4-ROUTING-GATEWAYS | Ask4 Office Gateway Builds | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.224/28 | 16 | ASK4-OFFICE | Ask4 Office DMZ 2 | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.240/30 | 4 | ASK4-CUST-BHP | BHP Internet | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.244/30 | 4 | ASK4-ROUTING-CORE | Wired Workplace Routing | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.248/30 | 4 | ASK4-TESTING | Test Hall Public Range | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.52.252/30 | 4 | ASK4-ROUTING-CORE | Office Testing Router WAN | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.0/29 | 8 | ASK4-ROUTING-GATEWAYS | Fortis All Saints | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.8/30 | 4 | ASK4-LINKNETS | DC1 Customer Internet Service | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.12/30 | 4 | ASK4-SERVERS | Sage Server | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.16/29 | 8 | ASK4-BUSI-VELOCITY | Velocity Tower Business Park | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.24/30 | 4 | ASK4-CUST-FRESH | Fresh Lucas Studios Staff Data | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.28/30 | 4 | ASK4-LINKNETS | Thorncliffe Park Routing | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.32/30 | 4 | ASK4-LINKNETS | New Omnia MikroTik | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.36/30 | 4 | ASK4-LINKNETS | IQ Fountain Edinburgh Edge Switch 1 Linknet | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.40/29 | 8 | ASK4-BUSI-OMNIASHEF | Omnia Customers | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.48/29 | 8 | ASK4-CUST-JENNIC | Jennic (A4B) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.56/30 | 4 | ASK4-TESTING | Sage Devel Server | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.60/30 | 4 | ASK4-LINKNETS | DC1 Rack 13 Interlink | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.64/27 | 32 | ASK4-ROUTING-GATEWAYS | Sheffield Gateways (Fibre Ring Anticlockwise) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.96/27 | 32 | ASK4-ROUTING-GATEWAYS | Sheffield Gateways (BT NTU #1) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.128/27 | 32 | ASK4-BUSI-OMNIASHEF | Omnia Customers 1 | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.160/27 | 32 | ASK4-SERVERS | Akamai Servers | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.53.192/26 | 64 | ASK4-BUSI-THORNCLIFFE | Thorncliffe Park Customers | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.0/30 | 4 | ASK4-LINKNETS | Lyme Regis Staff Data | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.4/30 | 4 | ASK4-LINKNETS | Chesil House Staff Data | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.8/30 | 4 | ASK4-LINKNETS | Okeford Staff Data | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.12/30 | 4 | ASK4-LINKNETS | Victoria Hall Wolverhampton (Frinter) | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.16/28 | 16 | ASK4-CUST-STN | Skynet Technologies Networks | ASSIGNED PA | Feb 16, 2007 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.32/30 | 4 | ASK4-LINKNETS | DC1 Firewall Linknet | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.36/30 | 4 | ASK4-BUSI-OMNIATRINITY | Omnia Trinity / McGinley Support Services Ltd - PR891 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.40/30 | 4 | ASK4-BUSI-OMNIASHEF | Hamlin Knight /30 (Omnia 1) | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.44/30 | 4 | ASK4-LINKNETS | Sheffield SAN Gateway Range | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.48/29 | 8 | ASK4-BUSI-OMNIASHEF | Omnia - customer range #3 | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.56/29 | 8 | ASK4-CUST-TWWARD | TW Ward (A4B) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.64/27 | 32 | ASK4-OFFICE | Ask4 HQ Workstations | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.96/27 | 32 | ASK4-ROUTING-GATEWAYS | Sheffield Gateways (Telewest Shelf 2) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.128/27 | 32 | ASK4-ROUTING-GATEWAYS | Sheffield Gateways (Kingston WestOne-150-1) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.160/27 | 32 | ASK4-ROUTING-GATEWAYS | Sheffield Gateways (Kingston WestOne-150-3) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.192/27 | 32 | ASK4-BUSI-ORGREAVE | Khepera (Orgreave) Business Centre Customer Range | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.54.224/27 | 32 | ASK4-ROUTING-GATEWAYS | Sheffield Gateways (Telewest Shelf 1) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.55.0/24 | 256 | ASK4-DIGITALREGION | Digital Region Dynamic PPP Range | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.0/26 | 64 | ASK4-OFFICE | Ask4 Office Workstations 3 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.64/29 | 8 | ASK4-ROUTING-GATEWAYS | Bramall Court Public | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.72/29 | 8 | ASK4-ROUTING-GATEWAYS | Mainstay The Pinnacles Public | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.80/29 | 8 | ASK4-ROUTING-GATEWAYS | Velocity Tower Sheffield Resi Public | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.88/29 | 8 | ASK4-ROUTING-GATEWAYS | Merlin Sheffield / Omnia Resi Public | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.96/29 | 8 | ASK4-CUST-JRIORTHA | JRI Orthopedics Routed Range <VLAN 2292> | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.104/30 | 4 | ASK4-BUSI-YTEL | YTEL - Gleaneagles | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.108/30 | 4 | ASK4-LINKNETS | IPSec Tunnel Monitoring MikroTik | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.112/29 | 8 | ASK4-LINKNETS | Paris Gardens Staff Data | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.120/29 | 8 | ASK4-ROUTING-GATEWAYS | Ashenhurst Houses | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.128/29 | 8 | ASK4-CUST-IQ | Quintain Brocco Staff | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.136/29 | 8 | ASK4-CUST-IQ | Quintain IQ Steel Staff | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.144/30 | 4 | ASK4-CUST-CITYESTATES | City Estates Routing/Voice | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.148/30 | 4 | ASK4-BUSI-THORNCLIFFE | Thorncliffe - Door Access | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.152/29 | 8 | ASK4-CUST-CITYESTATES | City Estates WAN | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.192/29 | 8 | ASK4-ROUTING-GATEWAYS | CCCU DSL Houses | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.200/29 | 8 | ASK4-ROUTING-GATEWAYS | Victoria Halls Newcastle | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.208/29 | 8 | ASK4-ROUTING-CORE | DC1 Infrastructure WAN | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.216/29 | 8 | ASK4-ROUTING-CORE | Ask4 HQ Gateway WAN | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.56.224/27 | 32 | ASK4-CUSTOMERS | Ask4 customers in Shipley (site #152) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.0/30 | 4 | ASK4-SERVERS | CCCU DSL Graphing Mikrotik | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.4/30 | 4 | ASK4-TESTING | vSZ-D Trial Data Interface | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.8/30 | 4 | ASK4-LINKNETS | DC1 - Onyx Linknet 2 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.12/30 | 4 | ASK4-CUSTOMERS | Ask4 customers in London (site #1235) | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.16/29 | 8 | ASK4-BUSI-ARUNDEL | DR PPPoE Routing | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.24/29 | 8 | ASK4-SERVERS | EoIP Bridge 3 Range | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.32/29 | 8 | ASK4-ROUTING-GATEWAYS | Carlton Premier Bangor | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.40/29 | 8 | ASK4-CUST-TECHNOPHOBIA | Technophobia Routing Range | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.48/30 | 4 | ASK4-LINKNETS | Technophobia Sheffield Linknet | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.52/30 | 4 | ASK4-CUST-BHP | BHP PDU1 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.56/29 | 8 | ASK4-BUSI-ARUNDEL | Arundel Business Centre WAN | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.64/29 | 8 | ASK4-CUST-SPECIALSTEEL | Special Steel Group Public WAN | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.72/30 | 4 | ASK4-LINKNETS | West One Digital Signage Gateway Linknet | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.76/30 | 4 | ASK4-LINKNETS | Panache Linknet | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.80/28 | 16 | ASK4-CUST-PANACHE | Panache Server Range | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.96/30 | 4 | ASK4-CUST-OPAL | Opal Sheffield 1 Staff | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.100/30 | 4 | ASK4-LINKNETS | Liberty Living DC1 Router | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.104/29 | 8 | ASK4-LINKNETS | Pipe Ten DC1 Linknet | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.112/29 | 8 | ASK4-ROUTING-GATEWAYS | The Crofts Building | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.120/30 | 4 | ASK4-BUSI-ARUNDEL | VMLoung Staff | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.124/30 | 4 | ASK4-CUST-QUALHEALTH | Quality Health HQ Router Linknet | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.128/28 | 16 | ASK4-BUSI-OMNIASHEF | Omnia 1/2 New Customer Range | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.144/29 | 8 | ASK4-LINKNETS | Origin Broadband BGP Linknet | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.152/29 | 8 | ASK4-ROUTING-GATEWAYS | St Andrews Court | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.160/27 | 32 | ASK4-ROUTING-GATEWAYS | Sheffield Gateways (Fibre Ring 2) | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.57.192/26 | 64 | ASK4-DIGITALREGION | Digital Region Static PPP Range | ASSIGNED PA | Apr 16, 2011 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.58.0/29 | 8 | ASK4-CUST-WORKS | Works Ltd (No VLAN) | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.58.8/29 | 8 | ASK4-CUST-LIBERTY | Liberty Living Outside Firewall Subnet | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.58.16/30 | 4 | ASK4-LINKNETS | Pipe Ten DC1 RB Linknet | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.58.20/30 | 4 | ASK4-ROUTING-CORE | TCW-VHB Backbone 2 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.58.24/30 | 4 | ASK4-ROUTING-CORE | TCW-VHB Backbone 3 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.58.28/30 | 4 | ASK4-ROUTING-CORE | THN-UoB Backbone 2 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.58.32/30 | 4 | ASK4-ROUTING-CORE | THN-UoB Backbone 3 | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.58.36/30 | 4 | ASK4-LINKNETS | DC1 Edge Switch 2 Linknet | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.58.40/30 | 4 | ASK4-CUST-LIBERTY | Liberty Head Office Wireless | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.58.44/30 | 4 | ASK4-ROUTING-CORE | TCW-THN Hibernia Atlantic 10G | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.58.48/28 | 16 | ASK4-CUST-LIBERTY | Liberty Living Public Server Range | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.58.64/29 | 8 | ASK4-SERVERS | Meru Wireless Controllers | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.58.72/30 | 4 | ASK4-ROUTING-GATEWAYS | eduroam Public Range | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.58.76/30 | 4 | ASK4-LINKNETS | Liberty DC1 Rack Router | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.58.80/28 | 16 | ASK4-BUSI-121IT | 121 IT - Westbrook Court Sheffield | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
| └ 81.23.58.96/29 | 8 | ASK4-CUST-WPAPIN | WPA Pinfold | ASSIGNED PA | May 4, 2016 | abuse@ via UK-ASK4INTERNET-20060214 |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
4,096 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Residential | 3,604 | 88% | 21 | |
| Hosting | 492 | 12% | 25 |
Network & registry
Origin network
AS41230
GB
- Name
- ASK4 Limited
- Type
- Internet provider
- Registered
- Jul 5, 2006
- Domain
- ask4.com
- Website
- www.ask4.com/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Sep 2006
- Current origin since
- Sep 2006 · 20 yr
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 81.
23. 48. 0/ 20 - Netname
- UK-ASK4INTERNET-20060214
- Registrant
- ASK4 Limited
- Registrant country
- GB
- Organization
- ASK4 Limited (ORG-AL47-RIPE)
- Org country
- GB
- Type
- ALLOCATED PA
- Created
- Feb 14, 2006
- Updated
- Feb 4, 2026
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- GB
- Delegated
- Feb 14, 2006
- Status
- assigned
Report abuse
Abuse contact
- abuse@
ask4. com - Name
- ASK4 Abuse Department
- Handle
- ASKF2-RIPE