Data as of Nov 11, 2026
81.128.131.8/29
No anonymizer space · no proxy exits in 30 daysBritish Telecommunications Limited
Residential-proxy exits
Proxy exits
1
13% of its addresses · listed by providers
Providers
19
selling exits here
Proxy providers listing exits
- 2Extract
- Ake.net
- AnyIP
- B2Proxy
- ByteProxies
- Byteful
- DataImpulse
- Evomi
- FlashProxy
- FloppyData
- GonzoProxy
- Infatica
- InfiniteProxies
- MangoProxy
- Proxiware
- Proxy-Seller
- Proxyma
- Shifter
- VitalExclusive
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 81.128.0.0/11 since May 2005 | AS2856 | Residential | 56,933 1,839 always on | British Telecommunications Limited |
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 81.128.0.0/11 | 2,097,152 | UK-BT-20020725 | British Telecommunications Limited (ORG-BPIS1-RIPE) · GB | ALLOCATED PA | Sep 10, 2002 | abuse@ |
| └ 81.128.0.0/12 | 1,048,576 | BT-INFRA | BT Infrastructure Layer | LIR-PARTITIONED PA | Aug 1, 2014 | abuse@ via UK-BT-20020725 |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
Network & registry
Announced by
Covering announcement 81.128.0.0/12
- Prefix
- 81.128.0.0/12
- Announced by
- AS2856 British Telecommunications Limited
- Type
- Residential
- Proxy exits
- 20,275
- Always-on exits
- 724
- RPKI
- RPKI valid
- Netname
- BT-INFRA
- Registrant
- BT Infrastructure Layer
- RIR
- RIPE NCC
Registry
Holder
- Organization
- British Telecommunications Limited
- Handle
- ORG-BPIS1-RIPE
- Range
- 81.
128. 0. 0/ 11 - Registration type
- ALLOCATED PA
- Record created
- Sep 10, 2002
- Reallocated to
- BT Infrastructure Layer
- Reallocated range
- 81.
128. 0. 0/ 12 - Reallocation type
- LIR-PARTITIONED PA
- Reallocated
- Aug 1, 2014
Origin network
AS2856
GB
- Name
- British Telecommunications Limited
- Type
- Internet provider
- Registered
- Dec 22, 1993
- Domain
- bt.net
- Website
- www.bt.net
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
- VPN servers
- 12
Routing timeline
Covering aggregate above, the prefix's own history below
81.128.0.0/12
Routing history
- Pattern
- Stable
- First seen
- Jun 2005
- Current origin since
- Jun 2005 · 21 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 81.128.0.0/12 | AS2856 | /12 | RIPE | RPKI valid |
| 81.128.0.0/11 | AS2856 | /11 | RIPE | Too specific |
IRR
Route objects on 81.128.0.0/12
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS2856 | RIPE | BT Public Internet Service | BTNET-INFRA-MNT | Jul 31, 2014 |
Whois
Registration for this announcement
- Range
- 81.
128. 0. 0/ 12 - Netname
- BT-INFRA
- Registrant
- BT Infrastructure Layer
- Registrant country
- GB
- Organization
- BT Infrastructure Layer
- Org country
- GB
- Type
- LIR-PARTITIONED PA
- Created
- Aug 1, 2014
- Updated
- Aug 1, 2014
- Maintainer
- BTNET-INFRA-MNT
- RIR
- RIPE NCC
- Country
- GB
- Delegated
- Jul 25, 2002
- Status
- assigned
Report abuse
Abuse contact
- abuse@
bt. com - Name
- Abuse-C Role
- Handle
- AR13878-RIPE