AS2856

Name: AS2856 — British Telecommunications PLC
Creator: ipdex

British Telecommunications PLC ISP registered in United Kingdom

481IPv4 prefixes

6IPv6 prefixes

69%RPKI-valid

#340AS Rank

#6Rank in United Kingdom

1993-12-22Allocated

British Telecommunications PLC (AS2856) — ISP, registered in United Kingdom. announces 481 IPv4 prefixes + 6 IPv6 prefixes. Rank in United Kingdom: #6. Allocated: 1993-12-22.

IPv4 481IPv6 6

Announced prefixes · 487

v4 109.144.0.0/12 valid
v4 109.180.0.0/15 valid
v4 109.205.158.0/24 valid
v4 109.249.0.0/16 valid
v4 132.146.0.0/16 valid
v4 132.153.244.0/24 unknown
v4 132.153.245.0/24 unknown
v4 132.153.246.0/24 unknown
v4 132.153.247.0/24 unknown
v4 132.153.248.0/24 unknown
v4 132.153.249.0/24 unknown
v4 132.153.250.0/24 unknown
v4 132.153.251.0/24 unknown
v4 132.153.252.0/24 unknown
v4 132.153.253.0/24 unknown
v4 132.153.254.0/24 unknown
v4 132.153.3.0/24 unknown
v4 132.244.79.0/24 unknown
v4 138.108.94.0/24 unknown
v4 142.205.162.0/23 unknown
v4 143.223.132.0/24 unknown
v4 144.177.74.0/23 unknown
v4 144.87.0.0/21 unknown
v4 144.87.128.0/18 unknown
v4 144.87.16.0/20 unknown
v4 144.87.24.0/21 unknown
v4 144.87.24.0/22 unknown
v4 144.87.28.0/22 unknown
v4 145.79.172.0/22 valid
v4 147.148.0.0/14 valid
v4 147.152.0.0/16 valid
v4 147.189.68.0/22 unknown
v4 147.189.76.0/22 unknown
v4 147.78.68.0/22 valid
v4 147.90.115.0/24 valid
v4 147.90.127.0/24 valid
v4 147.90.32.0/24 valid
v4 147.90.36.0/24 valid
v4 147.90.55.0/24 valid
v4 148.253.220.0/23 unknown
v4 149.117.130.0/24 unknown
v4 149.254.0.0/16 valid
v4 149.254.1.0/24 valid
v4 15.145.20.0/22 unknown
v4 151.240.180.0/22 valid
v4 151.240.184.0/22 valid
v4 151.240.188.0/22 valid
v4 151.240.192.0/22 valid
v4 151.240.196.0/22 valid
v4 151.240.200.0/22 valid

RPKI: rpki.cloudflare.com · 2026-06-19

— Routing status unavailable

Prefix history

Announced prefixes Source: ipdex daily snapshot · sparse rows, value holds until the next change (steps)

Data table

Day	Announced prefixes
2026-06-12	481
2026-06-13	481
2026-06-16	481
2026-06-19	487

Internet Exchanges · 2

LINX LON1 London 500 Gbps
LINX LON2 London 200 Gbps

Facilities · 3

3 Facilities · 1 Countries

Digital Realty London LHR20 London
Equinix LD5 - London, Slough Slough
Telehouse - London (Docklands North Two) London

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AS2856

Announced prefixes · 487

Prefix history

Internet Exchanges · 2

Facilities · 3

AS topology · Customer cone 154

Providers · 4

Peers · 92

Customers · 151

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