AS13205 British Telecommunications Limited
AS13205 is operated by British Telecommunications Limited and registered with RIPE NCC (GB) since 2000-05-04.
It announces 14 IPv4 and 0 IPv6 prefixes, 0% of them RPKI valid.
RIPE RIS sees 2 upstream and peer networks and 0 downstream networks next to it.
| Name | British Telecommunications Limited |
|---|---|
| Registry (RIR) | RIPE NCC |
| Country | United Kingdom (GB) |
| Delegated on | 2000-05-04 |
| Prefixes (IPv4 / IPv6) | 14 / 0 |
| RPKI valid | 0% (0 / 14) |
| Upstreams and peers | 2 |
| Downstream networks | 0 |
Routing health
- AS13205 announces 14 IPv4 and 0 IPv6 prefixes.
- No IPv6 prefixes announced.
- 14 announced prefixes are not covered by a ROA of AS13205 (they may have none, or another network’s).
- 2 upstreams and peers, 0 downstream networks seen.
For every check with the fix (IRR route objects, the RPKI state of each route, reverse DNS and the registration), run the full network report.
Announced prefixes 14
- 31.11.56.0/23
- 78.109.0.0/20
- 78.109.0.0/24
- 78.109.5.0/24
- 78.109.6.0/24
- 78.109.7.0/24
- 78.109.9.0/24
- 78.109.10.0/24
- 78.109.11.0/24
- 217.140.0.0/20
- 217.140.12.0/22
- 217.140.12.0/24
- 217.140.13.0/24
- 217.140.32.0/19
Upstreams and peers 2
The networks RIPE RIS sees next to AS13205 in BGP paths, the most visible first.
More about AS13205
Sources: RIR delegation data and PeeringDB (updated daily); routing from RIPEstat (RIPE NCC RIS and RPKI), refreshed daily. Routing data from 2026-11-12 18:22 UTC. The country is where the AS number was registered, not necessarily where the network operates.