AS5400

British Telecommunications PLC

AS 5400 BT

Autonomous Systems are networks typically governed by large ISPs that participate in global Internet routing. Each network is assigned a unique identification number known as the AS number or ASN by the Internet Assigned Numbers Authority.

700,416 IP addresses
ASN5400
NameBT
OrganizationBritish Telecommunications PLC
CountryUnited Kingdom  
RegistryRIPE NCC
IPv4 addresses700,416
IPv6 /64 networks1.01 x 242
Prefixes92
Other ASN allocated to British Telecommunications PLC
ASN Name IP addresses
2856 BT-UK-AS 16,438,784
6871 Plusnet 2,138,880
3300 BT 266,240
13205 UNSPECIFIED 22,016
49182 BTEngageIT 4,352
204047 BT-PSN-DNSP-AS 0
57688 BT-PSN-AS 0
25127 BTOW 0
25041 AWS-DX 0
15697 BT-BS 0
2855 BTRADIANZPARIS 0
12641 BT_MPLS 0
8472 BT-GERMANY-NGN 0
6685 BTRADIANZFRANKFURT 0
212556 BT-ESC 0
IPv4 Prefixes for AS5400 - showing the first 20 of 88 networks
Network Location Addresses
130.41.240.0/24 British Telecommunications PLC   London 256
130.41.241.0/24 British Telecommunications PLC   Amsterdam 256
132.244.240.0/24 Btia   Derby 256
132.244.64.0/21 Btia   Derby (Allenton) 2,048
132.244.72.0/21 Btia   Derby (Allenton) 2,048
136.238.224.0/24 HP Inc   Ebikon 256
136.238.84.0/24 HP Inc   Zurich 256
136.238.85.0/24 HP Inc   Zurich 256
137.133.22.0/24 Abb-Plpia   Warsaw 256
166.49.128.0/17 British Telecommunications PLC   Zurich 32,768
167.184.183.0/24 British Telecommunications PLC   Frankfurt am Main 256
167.184.184.0/21 British Telecommunications PLC   Frankfurt am Main 2,048
167.184.192.0/21 British Telecommunications PLC   Frankfurt am Main 2,048
167.184.200.0/23 British Telecommunications PLC   Frankfurt am Main 512
167.184.202.0/24 British Telecommunications PLC   Frankfurt am Main 256
185.249.4.0/24 Lumileds   Amsterdam 256
185.94.0.0/22 British Telecommunications PLC   Luxembourg 1,024
192.109.52.0/24 Tcde-Rr   Munich 256
193.141.192.0/19 NEC Electronics Europe GmbH   Düsseldorf (Stadtbezirk 06) 8,192
193.58.130.0/23 British Telecommunications PLC   Ixelles-Elsene 512
IPv6 Prefixes for AS5400
Network Location /64 Prefixes
2001:740::/32 British Telecommunications PLC   Bengaluru (Adarsh Palm Retreat) 232
2a00:2000::/22 Bt-euip Infrastructure   Amsterdam (Amsterdam-Zuidoost) 242
2a0c:7c80::/29 British Telecommunications PLC   Frankfurt am Main 235
2a0c:8480::/30 British Telecommunications PLC   Frankfurt am Main 234