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
61
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
Announcement history
One point per day, recorded at each table import
IPv4
IPv6
Recorded changes
New prefixes and origin changes seen on the live stream
| When | Change | Prefix | Origin | Path |
|---|---|---|---|---|
| 2026-11-02 07:43:01Z | origin change | 193.58.130.0/23 | AS213818 → AS5400 | 5572069395400 |
| 2026-11-01 05:08:24Z | origin change | 193.58.130.0/23 | AS213818 → AS5400 | 3288403277271745400 |
| 2026-11-01 04:59:15Z | origin change | 193.58.130.0/23 | AS5400 → AS213818 | 37989563001321324657702213818 |
| 2026-11-01 04:59:15Z | origin change | 193.58.130.0/23 | AS5400 → AS213818 | 37989563001321324657702213818 |
| 2026-10-27 16:13:59Z | new prefix | 213.194.0.120/29 | AS5400 British Telecommunications (International) | 503045400 |