AS2856 British Telecommunications 🇬🇧 GB
British Telecommunications Limited. Announcing 545 prefixes, seen at the RIS collectors.
IPv4 prefixes
538
18,467,328 (72,138 × /24)
IPv6 prefixes
7
136 × /32
Upstreams
3
transit providers observed
Peers
8
settlement-free adjacencies
Downstreams
149
transit customers observed
Customer cone
153
ASes reachable through it
Registry and operator data
- AS number
- AS2856
- Name
- British Telecommunications
- Organisation
- BTnet (BT's UK IP Network - AS2856)
- Country
- 🇬🇧 GB
- RIR
- RIPENCC
- Allocated
- 1993-12-22
- Network type
- NSP
- Traffic levels
- 1-5Tbps
- Scope
- Regional
- Peering policy
- Selective
- IRR as-set
- RIPE::AS-BTGB
- Website
- http://www.bt.net
- PeeringDB
- net/281
- Exchanges
- 2
- Facilities
- 3
RPKI coverage of this AS
Its own announcements, validated against the current ROA set
Announced prefixes
545 in total
| Prefix | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|
| 185.230.15.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 188.172.160.0/21 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 188.172.168.0/21 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 188.220.122.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 188.220.151.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 188.220.157.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 188.220.167.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 188.220.194.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 188.220.212.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 188.220.229.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 188.221.168.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 188.221.177.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 188.221.184.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 188.221.188.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 188.221.210.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 192.8.112.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 192.8.149.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 192.12.73.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 192.53.46.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 192.65.219.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 192.65.221.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 192.65.222.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 192.65.223.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 192.65.224.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 192.65.225.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 192.65.226.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 192.65.227.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 192.65.228.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 192.152.14.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 192.177.94.0/23 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 193.9.26.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.23.32.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.32.46.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.32.48.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.33.199.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.35.128.0/20 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 193.35.158.0/23 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.35.160.0/23 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.35.197.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.35.220.0/22 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.36.78.0/23 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 193.36.80.0/22 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 193.36.80.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 193.36.240.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.36.243.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.36.253.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.37.142.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.37.160.0/20 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 193.38.192.0/19 v4 | no ROA | 18 | 503042856 | 2026-09-18 |
| 193.38.192.0/22 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.38.192.0/23 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.38.194.0/23 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.39.141.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.84.142.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.111.18.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 193.111.19.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 193.113.0.0/16 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 193.138.107.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 193.187.140.0/22 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 193.195.138.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.32.20.0/22 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.32.29.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.32.31.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.32.207.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.35.183.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 194.36.68.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.36.135.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.59.188.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.60.136.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.60.137.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.60.138.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.60.139.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.72.0.0/14 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 194.101.69.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 194.102.0.0/19 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 194.132.24.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 194.132.25.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 194.155.58.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.169.32.0/21 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.189.44.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.189.186.0/23 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.227.72.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.227.73.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.227.120.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 194.246.78.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 195.35.123.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 195.36.106.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 195.88.20.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 195.99.0.0/16 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 195.104.240.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 195.130.3.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 195.130.6.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 195.130.11.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 195.130.12.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 195.130.13.0/24 v4 | no ROA | 42 | 503042856 | 2026-09-18 |
| 195.130.14.0/24 v4 | no ROA | 42 | 503042856 | 2026-09-18 |
| 195.130.15.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 195.171.0.0/16 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 195.182.62.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 195.218.32.0/19 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 198.178.235.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 198.232.43.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 205.239.40.0/23 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 205.239.42.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 207.180.43.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 209.101.8.0/23 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 212.82.0.0/19 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 212.134.46.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 212.134.52.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 212.134.54.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 212.134.124.0/22 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 212.134.164.0/22 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 212.134.208.0/22 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 212.134.224.0/22 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 212.140.0.0/16 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 212.148.1.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 212.212.16.0/22 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 213.1.0.0/16 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 213.120.0.0/14 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 213.169.196.0/23 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 213.169.202.0/23 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 213.190.16.0/23 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 213.190.18.0/23 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 213.205.192.0/18 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 213.205.208.0/20 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 213.209.146.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 213.209.149.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 213.209.150.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 213.249.188.0/22 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 216.120.189.0/24 v4 | no ROA | 41 | 503042856 | 2026-09-18 |
| 216.165.88.0/24 v4 | no ROA | 27 | 503042856 | 2026-09-18 |
| 217.15.64.0/20 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 217.31.9.0/24 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 217.31.10.0/23 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 217.32.0.0/12 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 217.217.36.0/22 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 217.217.56.0/22 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 217.217.60.0/22 v4 | RPKI valid | 41 | 503042856 | 2026-09-18 |
| 2001:4878:c259::/48 v6 | RPKI valid | 32 | 481852856 | 2026-09-18 |
| 2a00:2380::/25 v6 | RPKI valid | 32 | 481852856 | 2026-09-18 |
| 2a01:4c8::/29 v6 | RPKI valid | 32 | 481852856 | 2026-09-18 |
| 2a01:4c8:f400::/48 v6 | RPKI valid | 32 | 481852856 | 2026-09-18 |
| 2a01:4c8:f401::/48 v6 | RPKI valid | 32 | 481852856 | 2026-09-18 |
| 2a02:ee80:4176::/47 v6 | no ROA | 14 | 503042856 | 2026-09-18 |
| 2a03:1e82:90ff::/48 v6 | no ROA | 32 | 481852856 | 2026-09-18 |