51.64.0.0/16
🇬🇧IPv4RIPENCCassignedAS211077HO-LECN-DC01 UK Home Office (The Secretary of State for the Home Department)No ROA
CIDR
51.64.0.0/16
IP Version
IPv4
Addresses
65.5K
Mask
/16 (255.255.0.0)
Country
🇬🇧 United Kingdom
City
London
RIR
RIPENCC
Status
assigned
Allocated
9/1/1993
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 51.64.0.0/16 | AS211077HO-LECN-DC01 UK Home Office (The Secretary of State for the Home Department) | No ROA | RIPE | 5/30/2026 |
Covering Prefix
6 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 51.64.32.0/24 | AS2856BT-UK-AS British Telecommunications PLC | No ROA | — | 5/30/2026 |
| 51.64.34.0/24 | AS2856BT-UK-AS British Telecommunications PLC | No ROA | — | 5/30/2026 |
| 51.64.35.0/24 | AS2856BT-UK-AS British Telecommunications PLC | No ROA | — | 5/30/2026 |
| 51.64.255.0/24 | AS211015HO-LECN-DC02 UK Home Office (The Secretary of State for the Home Department) | No ROA | — | 5/30/2026 |
| 51.64.254.0/24 | AS211077HO-LECN-DC01 UK Home Office (The Secretary of State for the Home Department) | No ROA | — | 5/30/2026 |
| 51.64.9.0/24 | AS211077HO-LECN-DC01 UK Home Office (The Secretary of State for the Home Department) | No ROA | — | 5/30/2026 |
Geolocation
Abuse Contact
API
Open https://api.ipctl.io/v1/prefix/51.64.0.0/16Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/51.64.0.0/16" | jq
External Links