United Kingdom

AS5400

British Telecommunications PLC ISP registered in United Kingdom

78IPv4 prefixes
30IPv6 prefixes
75%RPKI-valid
#233AS Rank
327/327RIS visibility
#28Rank in United Kingdom
1995-08-15Allocated

British Telecommunications PLC (AS5400) — ISP, registered in United Kingdom. announces 78 IPv4 prefixes + 30 IPv6 prefixes. Rank in United Kingdom: #28. Allocated: 1995-08-15.

Announced prefixes · 108

RPKI: rpki.cloudflare.com · 2026-06-17

Routing: 78 IPv4 · 33 IPv6 announced · RIS visibility 327/327 RIS peers · RIPEstat · 2026-06-17

Prefix history

0 50 100 2026-06-12 2026-06-14
Announced prefixes Source: ipdex daily snapshot · sparse rows, value holds until the next change (steps)
Data table
DayAnnounced prefixes
2026-06-12108
2026-06-13108
2026-06-14108

Internet Exchanges · 53

+28

Facilities · 141

+116

AS topology · Customer cone 236

Providers · 4

Peers · 93

  • AS3257 GTT Communications Inc.
  • AS174 Cogent Communications, LLC
  • AS6939 Hurricane Electric LLC
  • AS6453 TATA COMMUNICATIONS (AMERICA) INC
  • AS6461 Zayo Bandwidth
  • AS6762 TELECOM ITALIA SPARKLE S.p.A.

Customers · 62

Embed this on your site

Free badges and live charts — they update as the index does. No key, link back to ipdex.

Badge AS5400 on ipdex

Markdown

[![AS5400 on ipdex](https://ipdex.io/badge/asn/5400.svg)](https://ipdex.io/asn/AS5400/)

HTML

<a href="https://ipdex.io/asn/AS5400/"><img src="https://ipdex.io/badge/asn/5400.svg" alt="AS5400 on ipdex"></a>

Live chart (iframe)

<iframe src="https://ipdex.io/embed/asn/5400" width="680" height="260" frameborder="0" scrolling="no" title="ipdex chart" style="border:0;max-width:100%"></iframe>

oEmbed-enabled: paste the page URL into platforms that support oEmbed and the chart embeds automatically.