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.

734,464 IP addresses
ASN5400
NameBT
OrganizationBritish Telecommunications PLC
CountryUnited Kingdom  
RegistryRIPE NCC
IPv4 addresses734,464
IPv6 /64 networks1.8 x 241
Prefixes125
Other ASN allocated to British Telecommunications PLC
ASN Name IP addresses
2856 BT-UK-AS 18,499,072
6871 Plusnet 2,130,944
13205 UNSPECIFIED 20,224
6685 GRAPEVINE 4,096
49182 BTEngageIT 256
2855 Business-Fabric 0
204047 BT-PSN-DNSP-AS 0
57688 BT-PSN-AS 0
25127 BTOW 0
25041 AWS-DX 0
15697 BT-BS 0
12641 BT_MPLS 0
8472 BT-GERMANY-NGN 0
212556 BT-ESC 0
IPv4 Prefixes for AS5400 - showing the first 20 of 85 networks
Network Location Addresses
132.244.240.0/24 Btia   Derby (Allenton) 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
166.49.128.0/17 British Telecommunications PLC   Zurich 32,768
185.249.4.0/24 Lumileds   Amsterdam 256
185.94.0.0/22 British Telecommunications PLC   Luxembourg 1,024
192.109.52.0/24 British Telecommunications PLC   Düsseldorf 256
194.107.114.0/24 British Telecommunications PLC   Paris 256
194.213.64.0/19 BT Global Services -Nordics   Stockholm 8,192
194.33.53.0/24 British Telecommunications PLC   London 256
194.33.54.0/24 Net RES-INT   London 256
194.33.55.0/24 British Telecommunications PLC   London 256
194.50.160.0/24 British Telecommunications PLC   Offenbach 256
194.74.80.0/21 BTIA Netherlands Regional POP   Amsterdam (Amsterdam-Zuidoost) 2,048
194.76.40.0/24 BT-Germany   Munich 256
195.100.0.0/16 BT Global Services -Nordics   Stockholm 65,536
195.163.0.0/16 British Telecommunications PLC   Stockholm 65,536
IPv6 Prefixes for AS5400 - showing the first 20 of 40 networks
Network Location /64 Prefixes
2001:740::/32 British Telecommunications PLC   London 232
2402:fb00:8000::/39 British Telecommunications PLC   London 225
2402:fb00:8400::/39 British Telecommunications Limited   Irving 225
2402:fb00:8800::/40 British Telecommunications Limited   Irving 224
2402:fb00:c000::/39 British Telecommunications Limited   Irving 225
2402:fb00:c200::/39 British Telecommunications Limited   Irving 225
2606:f100:d000::/39 British Telecommunications PLC   London 225
2606:f100:d400::/39 British Telecommunications PLC   London 225
2606:f100:d600::/39 British Telecommunications PLC   London 225
2606:f100:d800::/38 British Telecommunications PLC   London 226
2606:f100:dc00::/38 British Telecommunications PLC   London 226
2606:f100:e400::/39 British Telecommunications PLC   London 225
2a00:2000::/23 Bt-euip Infrastructure   Amsterdam (Amsterdam-Zuidoost) 241
2a00:2080::/32 BT Global Fabric   London 232
2a00:2081::/32 BT Global Fabric   Dublin 232
2a00:2082::/32 BT Global Fabric   Amsterdam 232
2a00:2083::/32 BT Global Fabric   Brussels (Brussels Capital) 232
2a00:2084::/32 BT Global Fabric   Schieren 232
2a00:2086::/32 BT Global Fabric   Vienna 232
2a00:2089::/32 BT Global Fabric   Frankfurt am Main 232