General Info




BT Infrastructure Layer


AS2856 British Telecommunications PLC

United Kingdom


Whois Details

inetnum: -
netname:         BT-INFRA
descr:           BT Infrastructure Layer
country:         GB
admin-c:         BS1474-RIPE
tech-c:          BS1474-RIPE
status:          LIR-PARTITIONED PA
mnt-by:          BTNET-INFRA-MNT
mnt-lower:       BTNET-MNT
mnt-routes:      BTNET-MNT
created:         2014-08-01T07:43:40Z
last-modified:   2014-08-01T07:43:40Z
source:          RIPE

role:            BTnet Support
address:         Adhara
address:         Adastral Park
address:         Martlesham Heath
address:         Ipswich
address:         SUFFLK IP5 3RE
address:         GB
phone:           +44 800 0858963 5
phone:           +44 1473 336231
admin-c:         FLS15-RIPE
tech-c:          BS1474-RIPE
nic-hdl:         BS1474-RIPE
remarks:         For all queries contact
remarks:         Please send delisting issues to
mnt-by:          BTNET-MNT
created:         2002-04-30T07:54:10Z
last-modified:   2009-11-19T15:52:52Z
source:          RIPE

descr:           BT Public Internet Service
origin:          AS2856
mnt-by:          BTNET-INFRA-MNT
created:         2005-06-16T14:11:53Z
last-modified:   2014-07-31T07:47:16Z
source:          RIPE

Company Details

We have details for more than 49 companies that use IP addresses within this IP range, including,,,, To find out more about our company details data contact sales.

Hosted Domain Names

There are 2,944 domain names hosted across 1,498 IP addresses within this IP range. To access full domain hosting information with our API contact us for more details.

IP Address Domain Domains on this IP 159 109 40 38 24 24 21 20 20 20 19 16 14 14 13 13 12 12 11 11

IP address subranges within this IP range


IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.