General Info




O2 Reference (UK)


AS2856 British Telecommunications PLC

United Kingdom


Protect Your Privacy

A Virtual Private Network (VPN) is an essential tool for protecting your privacy and ensuring your security while online. Read our VPN Guide to find out more.

Whois Details

inetnum: -
netname:          O2-reference
descr:            O2 Reference (UK)
country:          GB
admin-c:          OUIS1-RIPE
tech-c:           OUIS1-RIPE
status:           ASSIGNED PA
mnt-by:           O2UK-MNT
mnt-routes:       O2UK-MNT
mnt-routes:       BTNET-MNT
created:          2012-05-02T10,14,12Z
last-modified:    2017-05-10T10,10,33Z
source:           RIPE

role:             O2 UK IP Space Management
address:          GC
address:          Desk 1ER297a
address:          Telefonica UK
address:          260 Bath Road
address:          Slough
address:          Berkshire
address:          UK
address:          SL1 4DX
mnt-by:           O2UK-MNT
admin-c:          GC244-RIPE
tech-c:           GC244-RIPE
nic-hdl:          OUIS1-RIPE
created:          2009-07-09T16,27,15Z
last-modified:    2017-03-15T11,25,10Z
source:           RIPE

descr:            O2 Online (UK)
origin:           AS2856
mnt-by:           BTNET-MNT
mnt-by:           O2UK-MNT
created:          2012-05-02T12,16,26Z
last-modified:    2012-05-02T15,17,50Z
source:           RIPE

IP Addresses in this 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.