ASN Lookup Tool
AS2856 BT-UK-AS

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS2856
Organisation
British Telecommunications PLC
Name
BT-UK-AS
Total IPv4 Addresses
12137742
Total IPv4 Prefixes
355
Total IPv6 Prefixes
73
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#41 out of 76,859
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
CH flagSwisscom (Schweiz) AG
MY flagTM TECHNOLOGY SERVICES SDN BHD
US flagDigitalOcean, LLC
US flagZayo Bandwidth
GB flagCOLT Technology Services Group Limited
Showing 5 of 28
Transit To

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

 

ASN
Organisation
GB flagEE Limited
GB flagBritish Telecommunications PLC
US flagSchlumberger Limited
EU flagShell Information Technology International B.V.
US flagWhirlpool Corporation
Showing 5 of 171
IPv4 Active Prefixes

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

Range From5.80.0.0
Range To5.80.255.255
Range From5.81.0.0
Range To5.81.255.255
Showing 5 of 355
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.