AS5400 British Telecommunications (International)
- Autonomous system number
- AS5400
- Registered in
- GB
- Registry
- RIPE
- ASN registered
- 1995-08-15
- IPv4 prefixes announced
- 85
- IPv6 prefixes announced
- 40
- Internet exchanges
- 61
- Data centres
- 141
- Internet users (estimate)
- ~4,957
Prefix counts from the global routing table as of 2026-10-11. Exchange and data-centre counts are what the network lists in PeeringDB. User estimate by APNIC Labs, 2026-10-06. Website: www.bt.net
Cloud peering programs
Google Cloud Partner Interconnect provider: Google lists BT (Layer 3) - partner interconnect metros: FRA, IAD, LHR, ORD, SIN, SYD. Checked 2026-10-11.
Source: Supported service providers (Cloud Interconnect), Google Cloud documentation, licensed CC BY 4.0. Reformatted by BGPScout; the network and facility matches are ours.
Upstreams and peers, traceroute paths through it, where it hands off to its transit providers, routing history and alerts - free with an account, and queryable from Claude, ChatGPT and other AI agents through the BGPScout MCP server.
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