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
12150113
Total IPv4 Prefixes
370
Total IPv6 Prefixes
73
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#40 out of 77,412
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
2022-09-15
Receiving From

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

ASN
Organisation
AS33891
DE flagCore-Backbone GmbH
AS3356
US flagLevel 3 Parent, LLC
AS174
US flagCogent Communications
AS3303
CH flagSwisscom (Schweiz) AG
AS14061
US flagDigitalOcean, LLC
Showing 5 of 29
Transit To

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

 

ASN
Organisation
AS216056
CN flagJingqiu Xu
AS12576
GB flagEE Limited
AS6871
GB flagBritish Telecommunications PLC
AS72
US flagSchlumberger Limited
AS3917
EU flagShell Information Technology International B.V.
Showing 5 of 172
IPv4 Active Prefixes

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

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
Prefix5.133.124.0/22
Range From5.133.124.0
Range To5.133.127.255
Prefix5.181.136.0/22
Range From5.181.136.0
Range To5.181.139.255
Prefix15.145.20.0/22
Range From15.145.20.0
Range To15.145.23.255
Showing 5 of 370
IPv6 Active Prefixes
Prefix2001:4878:c259::/48
Range From2001:4878:c259::
Range To2001:4878:c259:ffff:ffff:ffff:ffff:ffff
Prefix2a00:2380::/32
Range From2a00:2380::
Range To2a00:2380:ffff:ffff:ffff:ffff:ffff:ffff
Prefix2a00:2381::/33
Range From2a00:2381::
Range To2a00:2381:7fff:ffff:ffff:ffff:ffff:ffff
Prefix2a00:2381:8000::/34
Range From2a00:2381:8000::
Range To2a00:2381:bfff:ffff:ffff:ffff:ffff:ffff
Prefix2a00:2381:c000::/35
Range From2a00:2381:c000::
Range To2a00:2381:dfff:ffff:ffff:ffff:ffff:ffff
Showing 5 of 73
Autonomous System (AS) is a network (or collection of networks) that are all managed and supervised by a single entity or organisation. This tool provides a comprehensive ownership and connectivity report for any given AS number.