BigDataCloud Logo

ASN Lookup Tool
AS2856 BT-UK-AS

Powered By:
ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS2856
Organisation
British Telecommunications PLC
Name
BT-UK-AS
Total IPv4 Addresses
12,674,538
Total IPv4 Prefixes
413
Total IPv6 Prefixes
6
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#34 out of 79,041
Registry
Ripe
Registered Country
GB flag GB
Registered Country Name
United Kingdom of Great Britain and Northern Ireland (the)
Registered Date
2002-08-30
Registration Last Change
2025-05-15
Receiving From

The list of active Autonomous Systems (ASs) which send traffic to that ASN.

ASN
Organisation
AS3303
CH flagSwisscom (Schweiz) AG
AS8220
GB flagCOLT Technology Services Group Limited
AS6461
US flagZayo Bandwidth
AS5413
GB flagWavenet Limited
AS5400
GB flagBritish Telecommunications PLC
Showing 5 of 25
Transit To

The list of active Autonomous Systems (ASs) which receive traffic from that ASN.

 

ASN
Organisation
AS6871
GB flagBritish Telecommunications PLC
AS72
US flagSchlumberger Limited
AS12576
GB flagEE Limited
AS65401
WORLD flagPrivate Use AS
AS3917
NL flagShell Information Technology International B.V.
Showing 5 of 155
IPv4 Active Prefixes

This provides the list of IPv4 address space routes/prefixes currently announced on Border Gateway Protocol (BGP).

Prefix5.35.192.0/21
Range From5.35.192.0
Range To5.35.199.255
Prefix5.80.0.0/16
Range From5.80.0.0
Range To5.80.255.255
Prefix5.81.0.0/16
Range From5.81.0.0
Range To5.81.255.255
Prefix5.83.212.0/24
Range From5.83.212.0
Range To5.83.212.255
Prefix5.83.213.0/24
Range From5.83.213.0
Range To5.83.213.255
Showing 5 of 413
IPv6 Active Prefixes
Prefix2001:4878:c259::/48
Range From2001:4878:c259::
Range To2001:4878:c259:ffff:ffff:ffff:ffff:ffff
Prefix2a00:2380::/25
Range From2a00:2380::
Range To2a00:23ff:ffff:ffff:ffff:ffff:ffff:ffff
Prefix2a01:4c8:f400::/48
Range From2a01:4c8:f400::
Range To2a01:4c8:f400:ffff:ffff:ffff:ffff:ffff
Prefix2a01:4c8:f401::/48
Range From2a01:4c8:f401::
Range To2a01:4c8:f401:ffff:ffff:ffff:ffff:ffff
Prefix2a02:ee80:4176::/47
Range From2a02:ee80:4176::
Range To2a02:ee80:4177:ffff:ffff:ffff:ffff:ffff
Showing 5 of 6