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 151.241.180.0/22 valid
v4 151.241.184.0/22 valid
v4 151.241.188.0/22 valid
v4 151.241.192.0/22 valid
v4 151.241.196.0/22 valid
v4 151.241.200.0/22 valid
v4 151.241.52.0/22 valid
v4 151.241.56.0/22 valid
v4 151.241.60.0/22 valid
v4 151.242.24.0/24 valid
v4 151.242.42.0/24 valid
v4 151.243.254.0/24 valid
v4 151.244.204.0/22 valid
v4 151.244.208.0/22 valid
v4 151.244.80.0/22 valid
v4 151.245.204.0/22 valid
v4 151.245.208.0/22 valid
v4 151.245.80.0/22 valid
v4 151.246.145.0/24 valid
v4 151.246.239.0/24 valid
v4 151.247.220.0/24 valid
v4 151.247.231.0/24 valid
v4 151.247.245.0/24 valid
v4 152.114.196.0/24 unknown
v4 152.114.220.0/23 unknown
v4 152.114.222.0/23 unknown
v4 156.146.3.0/24 unknown
v4 157.236.254.0/23 unknown
v4 157.236.254.0/24 unknown
v4 157.236.255.0/24 unknown
v4 159.180.96.0/19 unknown
v4 159.197.13.0/24 unknown
v4 159.197.44.0/24 unknown
v4 159.197.45.0/24 unknown
v4 159.253.66.0/23 valid
v4 163.5.115.0/24 valid
v4 163.5.122.0/24 valid
v4 163.5.208.0/24 valid
v4 163.5.217.0/24 valid
v4 163.5.222.0/24 valid
v4 163.5.249.0/24 valid
v4 163.5.37.0/24 valid
v4 163.5.67.0/24 valid
v4 163.5.98.0/24 valid
v4 164.134.1.0/24 unknown
v4 164.134.134.0/24 unknown
v4 164.134.135.0/24 unknown
v4 164.134.136.0/24 unknown
v4 164.134.137.0/24 unknown
v4 164.134.138.0/24 unknown

RPKI: rpki.cloudflare.com · 2026-06-20

— 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
2026-06-20	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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