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AS5400

British Telecommunications Limited

AS5400 is British Telecommunications Limited (bt.net). It announces 713,728 IPv4 addresses in 86 prefixes, and 40 IPv6 prefixes.

United Kingdom· RIPE· allocated 1995-08-15· isp

713,728
IPv4 addresses announced
86
IPv4 prefixes
40
IPv6 prefixes
77.78%
of its routes RPKI-valid
713,728
of its IPv4 geolocated
29
countries

Where its space is

The IPv4 it announces that IP Geolocation places, by country. A /24 counts for the AS announcing most of it.

top 12 of 29
  1. United Kingdom224,019 · 31.39%
  2. Sweden199,740 · 27.99%
  3. United States74,724 · 10.47%
  4. Germany73,254 · 10.26%
  5. The Netherlands42,039 · 5.89%
  6. Belgium25,950 · 3.64%
  7. France13,540 · 1.90%
  8. Spain13,312 · 1.87%
  9. Czechia7,247 · 1.02%
  10. Italy7,230 · 1.01%
  11. Switzerland6,706 · 0.94%
  12. Luxembourg5,839 · 0.82%

Registry record

Its ASN Whois record, as the registry publishes it.

handle
BT
name
British Telecommunications Limited
org
ORG-CNS3-RIPE
org name
British Telecommunications Limited
org address
Pritech Park SEZ, Bellandur village, Varthur Hob, KA 560103, Bengaluru, INDIA
org country
GB
country
GB
source
ripe
status
ASSIGNED
created
2002-08-29
updated
2026-03-18
remarks
Upstreams: / Peers: / ALL peering requests see / www.bt.net/cgi-bin/peering-request / for technical issues, pls contact: peering@bt.com / for abuse, pls contact abuse@eu.bt.net / 24/7 NOC email / network@bt.com / 24/7 NOC phone / +44 203 7882214 opt 1 / This object describes non-customer peerings / Customer peerings are described in the macro AS-BT-XX / (replace XX with the country code NL, UK, BE, IE,etc) / Communities scheme: / The following BGP communities can be set by BT / BGP customers to affect annou
maintainer
RIPE-NCC-END-MNT|CIP-MNT
abuse name
Abuse-C Role
abuse email
abuse@eu.bt.net
abuse kind
role

What the databases see

Addresses each address-keyed database holds in the IPv4 it announces, as a share of that space, with its largest providers. Counts overlap.

IPv4 prefixes

Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.

86 prefixes
PREFIXCOUNTRYRPKIPEERSFIRST SEEN
31.95.0.0/21United Kingdomvalid172026-10-02
31.95.14.0/23Irelandvalid172026-10-02
31.95.16.0/20The Netherlandsvalid172026-10-02
31.95.48.0/21Belgiumvalid172026-10-02
31.95.56.0/24Luxembourgvalid172026-10-02
31.95.64.0/21Austriavalid172026-10-02
31.95.96.0/19Germanyvalid172026-10-02
31.95.160.0/20Francevalid172026-10-02
31.95.184.0/21Italyvalid172026-10-02
31.95.208.0/21Switzerlandvalid172026-10-02
31.95.218.0/23Spainvalid172026-10-02
31.95.220.0/22Portugalvalid172026-10-02
31.95.240.0/22Denmarkvalid172026-10-02
31.95.246.0/23Swedenvalid172026-10-02
31.95.248.0/22Finlandvalid172026-10-02
31.95.254.0/23Norwayvalid172026-10-02
46.248.8.0/23Belgiumnot found172026-10-02
46.248.10.0/23Belgiumnot found172026-10-02
62.5.0.0/17United Kingdomvalid172026-10-02
62.102.0.0/17United Kingdomvalid172026-10-02
62.134.0.0/16United Kingdomvalid172026-10-02
62.172.0.0/21United Kingdomvalid172026-10-02
62.173.192.0/18United Kingdomvalid172026-10-02
62.180.0.0/16Germanyvalid172026-10-02
80.255.160.0/20Luxembourgnot found172026-10-02
80.255.160.0/24Luxembourgnot found172026-10-02
80.255.161.0/24Luxembourgnot found172026-10-02
80.255.162.0/24Luxembourgnot found172026-10-02
82.138.160.0/19Denmarknot found172026-10-02
82.150.0.0/19United Kingdomvalid172026-10-02
132.244.64.0/21United Kingdomnot found172026-10-02
132.244.72.0/21United Kingdomnot found172026-10-02
132.244.240.0/24United Kingdomnot found172026-10-02
136.238.84.0/24Switzerlandnot found172026-10-02
136.238.85.0/24Switzerlandnot found172026-10-02
136.238.224.0/24Switzerlandnot found172026-10-02
166.49.128.0/17Switzerlandvalid172026-10-02
185.94.0.0/22Luxembourgvalid172026-10-02
185.249.4.0/24The Netherlandsnot found172026-10-02
192.109.52.0/24Germanyvalid172026-10-02
193.58.130.0/23Belgiumnot found172026-10-02
194.33.53.0/24United Kingdomnot found172026-10-02
194.33.54.0/24United Kingdomnot found172026-10-02
194.33.55.0/24United Kingdomnot found172026-10-02
194.50.160.0/24Germanynot found172026-10-02
194.74.80.0/21The Netherlandsvalid172026-10-02
194.76.40.0/24Germanynot found172026-10-02
194.107.114.0/24Francenot found172026-10-02
194.213.64.0/19Swedenvalid172026-10-02
195.36.82.0/24Germanynot found172026-10-02
195.36.104.0/24Belgiumnot found172026-10-02
195.60.182.0/24Swedennot found172026-10-02
195.60.183.0/24Swedennot found172026-10-02
195.66.70.0/24Germanynot found172026-10-02
195.90.64.0/19The Netherlandsvalid172026-10-02
195.99.64.0/20The Netherlandsvalid172026-10-02
195.100.0.0/16Swedenvalid172026-10-02
195.163.0.0/16Swedenvalid172026-10-02
195.171.36.0/22Belgiumvalid172026-10-02
195.182.96.0/19Germanyvalid172026-10-02
198.178.236.0/24United Statesnot found172026-10-02
203.158.68.0/23Japanvalid172026-10-02
203.158.72.0/23Hong Kongvalid172026-10-02
203.158.76.0/23Singaporevalid172026-10-02
203.158.88.0/24Australiavalid172026-10-02
203.158.89.0/24Australiavalid172026-10-02
204.52.188.0/24United Statesnot found172026-10-02
204.231.112.0/24United Statesvalid172026-10-02
206.73.0.0/16United Statesvalid172026-10-02
206.73.0.0/19United Statesvalid172026-10-02
206.73.48.0/20United Statesvalid172026-10-02
206.73.80.0/20United Statesvalid172026-10-02
206.73.112.0/22United Statesvalid172026-10-02
206.73.116.0/22United Statesvalid172026-10-02
206.73.156.0/22United Statesvalid172026-10-02
212.8.160.0/19Belgiumvalid172026-10-02
212.21.192.0/19Italyvalid172026-10-02
212.31.192.0/19Spainvalid172026-10-02
212.41.128.0/19The Netherlandsvalid172026-10-02
212.108.0.0/19The Netherlandsvalid172026-10-02
212.127.0.0/19United Kingdomvalid172026-10-02
212.162.192.0/18United Kingdomvalid172026-10-02
213.15.0.0/16Swedenvalid172026-10-02
213.137.160.0/19Switzerlandvalid172026-10-02
213.194.0.0/18Luxembourgvalid172026-10-02
213.236.64.0/18United Kingdomvalid172026-10-02

IPv6 prefixes

Every IPv6 prefix BGP Route saw it announce.

40 prefixes
PREFIXCOUNTRYRPKIPEERSFIRST SEEN
2001:740::/32United Kingdomvalid202026-10-02
2402:fb00:8000::/39United Statesvalid202026-10-02
2402:fb00:8400::/39United Statesvalid202026-10-02
2402:fb00:8800::/40United Statesvalid202026-10-02
2402:fb00:c000::/39United Statesvalid202026-10-02
2402:fb00:c200::/39United Statesvalid202026-10-02
2606:f100:d000::/39United Statesvalid202026-10-02
2606:f100:d400::/39United Statesvalid202026-10-02
2606:f100:d600::/39United Statesvalid202026-10-02
2606:f100:d800::/38United Statesvalid202026-10-02
2606:f100:dc00::/38United Statesvalid202026-10-02
2606:f100:e400::/39United Statesvalid202026-10-02
2a00:2000::/23United Kingdomvalid202026-10-02
2a00:2080::/32United Kingdomvalid202026-10-02
2a00:2081::/32Irelandvalid202026-10-02
2a00:2082::/32The Netherlandsvalid202026-10-02
2a00:2083::/32Belgiumvalid202026-10-02
2a00:2084::/32Luxembourgvalid202026-10-02
2a00:2086::/32Austriavalid202026-10-02
2a00:2089::/32Germanyvalid202026-10-02
2a00:208a::/32Francevalid202026-10-02
2a00:208b::/32Italyvalid202026-10-02
2a00:208c::/32Switzerlandvalid202026-10-02
2a00:208d::/32Spainvalid202026-10-02
2a00:2090::/32Portugalvalid202026-10-02
2a00:2094::/32United Kingdomvalid202026-10-02
2a00:2095::/32United Kingdomvalid202026-10-02
2a00:2096::/32United Kingdomvalid202026-10-02
2a00:2097::/32United Kingdomvalid202026-10-02
2a00:2200::/25United Kingdomvalid202026-10-02
2a00:2200:200::/40United Kingdomvalid202026-10-02
2a00:2200:300::/40United Kingdomvalid202026-10-02
2a00:2200:900::/40United Kingdomvalid202026-10-02
2a00:2200:b00::/40United Kingdomvalid202026-10-02
2a00:2200:d00::/40United Kingdomvalid202026-10-02
2a00:2200:2000::/40United Kingdomvalid202026-10-02
2a00:2200:5300::/40United Kingdomvalid202026-10-02
2a00:2280::/25United Kingdomvalid202026-10-02
2a00:2300::/25United Kingdomvalid202026-10-02
2a0c:7c80::/29Germanyvalid202026-10-02
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