Data as of Nov 8, 2026
51.241.138.0/23
Anonymizer · ISP proxyKorea Telecom · space held by Sky UK Limited
Announcement
this exact prefix
RPKI valid
Announced by
Type
ISP proxy
Risk
90 / 100 · Critical
Recent change
New origin Jul 2026
its first announcement on record
IPv4 market
Path
Announced by AS4766 since Jul 2026 · 3 mo ago
4 · Use
ISP proxy
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 51.241.138.0/23 | /24s |
|---|---|---|
| IPXO | 512100% | 2 |
Leased from
Owners leasing their own space
| Name | In 51.241.138.0/23 | /24s |
|---|---|---|
| Sky UK Limited | 512100% | 2 |
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
51.241.138.0/23
From the registry to its use
- Feb 5, 2026Registry recordSky UK LimitedALLOCATED PA51.241.0.0/16
- Feb 5, 2026ReallocatedSky UK LimitedSUB-ALLOCATED PA51.241.128.0/17
- Jul 29, 2026Route objectIPXORIPE route object for AS4766 Korea Telecom, maintainer NETUTILS-MNT
- Jul 30, 2026– today
- Jul 31, 2026Route objectIPXORADB route object for AS4766 Korea Telecom, maintainer MAINT-AS834
- todayLeased fromIPXOIP broker
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 |
|---|---|---|---|---|---|---|
| 51.241.0.0/16 | 65,536 | UK-SKY-19930901 | Sky UK Limited (ORG-SUL39-RIPE) · GB | ALLOCATED PA | Feb 5, 2026 | hostmaster@ |
| └ 51.241.128.0/17 | 32,768 | SKY-LEASED-IPXO | Sky UK Limited (ORG-SUL39-RIPE) · GB | SUB-ALLOCATED PA | Feb 5, 2026 | report@ |
Network & registry
IPv4 market
Holder
- Organization
- Sky UK Limited
- Handle
- ORG-SUL39-RIPE
- Range
- 51.
241. 0. 0/ 16 - Registration type
- ALLOCATED PA
- Record created
- Feb 5, 2026
Origin network
AS4766
KR
- Name
- Korea Telecom
- Type
- Internet provider
- Registered
- Apr 22, 1996
- Domain
- kt.com
- Website
- www.kt.com/eng/main.jsp
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
- VPN servers
- 1
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Jul 2026
- Current origin since
- Jul 2026 · 3 mo
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 51.
241. 128. 0/ 17 - Netname
- SKY-LEASED-IPXO
- Registrant
- Sky UK Limited
- Registrant country
- GB
- Organization
- Sky UK Limited (ORG-SUL39-RIPE)
- Org country
- GB
- Type
- SUB-ALLOCATED PA
- Created
- Feb 5, 2026
- Updated
- Jul 9, 2026
- Maintainer
- netutils-mnt
- RIR
- RIPE NCC
- Country
- GB
- Delegated
- Sep 1, 1993
- Status
- assigned
Report abuse
Abuse contact
- report@
abuseradar. com - Name
- Internet Utilities Abuse Contact
- Handle
- AR834