British Telecommunications PLC

AS 2856 BT-UK-AS BTnet UK Regional network

British Telecommunications PLC

AS 2856 BT-UK-AS BTnet UK Regional network


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.

  15,437,824 IP addresses

  Network
ASN2856
NameBT-UK-AS BTnet UK Regional network
OrganizationBritish Telecommunications PLC
CountryUnited Kingdom  
RegistryRIPE NCC


  Details
IPv4 addresses15,437,824
IPv6 /64 networks1.01 x 239
Prefixes197


  Other ASN allocated to British Telecommunications PLC
ASN Name IP addresses
6871 PLUSNET UK Internet Service Provider 1,876,736
5400 BT 873,472
3300 BT 323,840
13205 BTWWIDC-H Autonomous System 17,664
15697 BT-BS 256


  Prefixes for AS2856
IPv4 addresses - showing the first 20 of 194 networks
Network Location Addresses
British Telecommunications PLC   Edgware (Colindale) 1,048,576
British Telecommunications PLC   Folkestone 256
Cognizant   Henstridge 1,024
Btl   York 65,536
British Telecommunications PLC   Southgate 256
British Telecommunications PLC   Southgate 256
British Telecommunications PLC   Southgate 256
British Telecommunications PLC   Southgate 256
British Telecommunications PLC   Southgate 256
British Telecommunications PLC   Southgate 256
British Telecommunications PLC   Southgate 256
British Telecommunications PLC   Southgate 256
British Telecommunications PLC   Southgate 256
British Telecommunications PLC   Southgate 256
British Telecommunications PLC   Southgate 256
Atomic Weapons Establishment   Aldermaston 256
British Telecommunications PLC   Caton 256
Akamai Technologies, Inc.   London 1,024
Akamai Technologies, Inc.   London 1,024
British Telecommunications PLC   London 256

IPv6 addresses
Network Location /64 Prefixes
British Telecommunications PLC   Tempsford 216
Bt Uk   York 239
Uk-Sasglcom   Colgate 232