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.

702,720 IP addresses
ASN5400
NameBT
OrganizationBritish Telecommunications PLC
CountryUnited Kingdom  
RegistryRIPE NCC
IPv4 addresses702,720
IPv6 /64 networks1.78 x 241
Prefixes79
Other ASN allocated to British Telecommunications PLC
ASN Name IP addresses
2856 BT-UK-AS 20,081,664
6871 Plusnet 2,098,176
3300 BT 600,360
13205 UNSPECIFIED 20,992
6685 GRAPEVINE 4,096
204047 BT-PSN-DNSP-AS 0
57688 BT-PSN-AS 0
49182 BTEngageIT 0
25127 BTOW 0
25041 AWS-DX 0
15697 BT-BS 0
2855 Business-Fabric 0
12641 BT_MPLS 0
8472 BT-GERMANY-NGN 0
212556 BT-ESC 0
IPv4 Prefixes for AS5400 - showing the first 20 of 66 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
193.202.26.0/24 Infratest GmbH   Munich (Laim) 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   Rüsselsheim am Main (Königstädten) 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
IPv6 Prefixes for AS5400
Network Location /64 Prefixes
2001:740::/32 British Telecommunications PLC   Bengaluru (Adarsh Palm Retreat) 232
2a00:2000::/23 Bt-euip Infrastructure   Amsterdam (Amsterdam-Zuidoost) 241
2a00:2200:200::/40 British Telecommunications PLC   London 224
2a00:2200:300::/40 British Telecommunications PLC   London 224
2a00:2200:5300::/40 British Telecommunications PLC   London 224
2a00:2200:900::/40 British Telecommunications PLC   London 224
2a00:2200::/25 British Telecommunications PLC   London 239
2a00:2200:b00::/40 British Telecommunications PLC   London 224
2a00:2200:d00::/40 British Telecommunications PLC   London 224
2a00:2280::/25 British Telecommunications PLC   London 239
2a00:2300::/25 British Telecommunications PLC   York 239
2a0c:7c80::/29 British Telecommunications PLC   Frankfurt am Main 235
2a0c:8480::/30 Tcde-Rr   Ditzingen 234