AS5400 British Telecommunications (International) 🇬🇧 GB
British Telecommunications Limited. Announcing 126 prefixes, seen at the RIS collectors.
IPv4 prefixes
86
734,480 (2,869 × /24)
IPv6 prefixes
40
921 × /32
Upstreams
5
transit providers observed
Peers
20
settlement-free adjacencies
Downstreams
63
transit customers observed
Customer cone
322
ASes reachable through it
Registry and operator data
- AS number
- AS5400
- Name
- British Telecommunications (International)
- Organisation
- BT
- Country
- 🇬🇧 GB
- RIR
- RIPENCC
- Allocated
- 1995-08-15
- Network type
- NSP
- Traffic levels
- 1-5Tbps
- Scope
- Europe
- Peering policy
- Restrictive
- IRR as-set
- RIPE::AS-BT-EU
- Website
- http://www.bt.net
- Looking glass
- http://lg.bt.net/
- PeeringDB
- net/118
- Exchanges
- 61
- Facilities
- 141
RPKI coverage of this AS
Its own announcements, validated against the current ROA set
Upstreams
Networks seen providing transit to this one
| Network | Country | Cone | IPv4 prefixes | Paths | Source |
|---|---|---|---|---|---|
| AS3356 Lumen (Level 3) | 🇺🇸 US | 72,829 | 2,070 | 5,252 | CAIDA |
| AS1299 Arelion (fka. Telia Carrier) | 🇸🇪 SE | 70,137 | 109 | 10,531 | CAIDA |
| AS2914 NTT America, Inc. | 🇺🇸 US | 59,142 | 1,723 | 63 | CAIDA |
| AS4637 Telstra International Limited | ðŸ‡ðŸ‡° HK | 45,489 | 669 | 1,075 | CAIDA |
| AS7195 EdgeUno | 🇨🇴 CO | 38,270 | 125 | 22 | CAIDA |
Peers
Adjacencies that look settlement-free rather than transit
| Network | Country | Cone | IPv4 prefixes | Paths | Source |
|---|---|---|---|---|---|
| AS174 Cogent Communications, LLC | 🇺🇸 US | 67,532 | 3,894 | 2,363 | CAIDA |
| AS3257 GTT Communications Inc. | 🇺🇸 US | 65,654 | 1,909 | 3,561 | CAIDA |
| AS6453 TATA Communications (America) Inc | 🇺🇸 US | 59,475 | 125 | 1,069 | CAIDA |
| AS6939 Hurricane Electric LLC | 🇺🇸 US | 57,042 | 241 | 4,775 | CAIDA |
| AS6762 Telecom Italia Sparkle (Seabone) | 🇮🇹 IT | 55,842 | 307 | 1,173 | CAIDA |
| AS9002 RETN Limited | 🇬🇧 GB | 55,329 | 14 | 698 | CAIDA |
| AS3320 Deutsche Telekom AG | 🇩🇪 DE | 54,532 | 928 | 1 | CAIDA |
| AS5511 Orange S.A. | 🇫🇷 FR | 53,986 | 742 | 4 | CAIDA |
| AS3491 PCCW Global (HK) Ltd. | ðŸ‡ðŸ‡° HK | 53,097 | 527 | 393 | CAIDA |
| AS1273 Vodafone Group PLC | 🇪🇺 EU | 51,584 | 174 | 231 | CAIDA |
| AS6830 Liberty Global Europe Holding B.V. | 🇳🇱 NL | 34,263 | 167 | 2 | CAIDA |
| AS20485 JSC TransTeleCom | 🇷🇺 RU | 30,817 | 85 | 1,141 | CAIDA |
| AS33891 Core-Backbone GmbH | 🇩🇪 DE | 30,565 | 1 | 1,338 | CAIDA |
| AS577 Bell Canada | 🇨🇦 CA | 28,958 | 16,139 | 464 | CAIDA |
| AS1257 Tele2 Sverige AB | 🇪🇺 EU | 643 | 386 | 1 | CAIDA |
| AS13030 Init7 (Switzerland) Ltd. | 🇨🇠CH | 308 | 70 | 50 | CAIDA |
| AS42708 Glesys AB | 🇸🇪 SE | 98 | 203 | 530 | CAIDA |
| AS1836 green.ch AG | 🇨🇠CH | 45 | 76 | 1,274 | CAIDA |
| AS50304 Blix Solutions AS | 🇳🇴 NO | 33 | 97 | 506 | CAIDA |
| AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC) | 🇳🇱 NL | 0 | 7 | 1,173 | CAIDA |
Downstreams
Networks this one appears to provide transit to
Relationships marked inferred come from where the two networks sit on the AS paths the collectors see, which is a guess and is wrong for some of them. The rest are stated by CAIDA's published inference over a much wider set of collectors.