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ASN Lookup Tool
AS2856 British Telecommunications PLC

An 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.

ASN Lookup for:

AS2856

Powered By:
ASN Extended Info API
BGP Active Prefixes API
ASN Details JSON View

ASN Details

ASN
AS2856
Organisation
British Telecommunications PLC
AS Name
BT-UK-AS
IPv4 Addresses Announced
12,049,707
IPv4 Prefixes Announced
426
IPv6 Prefixes Announced
73
IPv4 Bogon Prefixes
0
IPv6 Bogon Prefixes
0
IPv4 Space Rank
#41 out of 75,468
Registry
Ripe
Registered Country
GB flag GB
Registration Date
2002-08-30
Registration Change
2022-09-15

Receiving From

ASN
Organisation
ASN
AS3303
Organisation
CH flag Swisscom (Schweiz) AG
ASN
AS14061
Organisation
US flag DigitalOcean, LLC
ASN
AS6461
Organisation
US flag Zayo Bandwidth
ASN
AS37100
Organisation
MU flag SEACOM Limited
ASN
AS8426
Organisation
GB flag Claranet Limited
ASN
AS5413
Organisation
GB flag Daisy Corporate Services Trading Ltd
ASN
AS5400
Organisation
GB flag British Telecommunications PLC
ASN
AS13237
Organisation
DE flag euNetworks GmbH
ASN
AS8468
Organisation
GB flag Cityfibre Limited
ASN
AS30844
Organisation
GB flag Liquid Telecommunications Ltd
Showing 10 of 23 Results View More >

Transit To

ASN
Organisation
ASN
AS12576
Organisation
GB flag EE Limited
ASN
AS6871
Organisation
GB flag British Telecommunications PLC
ASN
AS72
Organisation
US flag Schlumberger Limited
ASN
AS3917
Organisation
EU flag Shell Information Technology International B.V.
ASN
AS11757
Organisation
US flag Whirlpool Corporation
ASN
AS33442
Organisation
US flag Zebra Technologies Corporation
ASN
AS395959
Organisation
US flag XEROX CORPORATION
ASN
AS2134
Organisation
ES flag Santander Global Technology, S.L.U
ASN
AS15499
Organisation
DE flag Computacenter Management GmbH trading as Computa..
ASN
AS1294
Organisation
US flag NTT DATA Services Holdings Corporation
Showing 10 of 173 Results View More >

Active Prefixes IPv4

Prefix
Range From
Range To
Prefix
103.10.251.0/24
Range From
103.10.251.0
Range To
103.10.251.255
Prefix
109.144.0.0/12
Range From
109.144.0.0
Range To
109.159.255.255
Prefix
109.205.158.0/24
Range From
109.205.158.0
Range To
109.205.158.255
Prefix
116.66.142.0/23
Range From
116.66.142.0
Range To
116.66.143.255
Prefix
132.146.0.0/16
Range From
132.146.0.0
Range To
132.146.255.255
Prefix
132.153.244.0/24
Range From
132.153.244.0
Range To
132.153.244.255
Prefix
132.153.245.0/24
Range From
132.153.245.0
Range To
132.153.245.255
Prefix
132.153.246.0/24
Range From
132.153.246.0
Range To
132.153.246.255
Prefix
132.153.247.0/24
Range From
132.153.247.0
Range To
132.153.247.255
Prefix
132.153.248.0/24
Range From
132.153.248.0
Range To
132.153.248.255
Showing 10 of 426 Results View More >

Active Prefixes IPv6

Prefix
Range From
Range To
Prefix
2001:4878:c259::/48
Range From
2001:4878:c259::
Range To
2001:4878:c259:ffff:ffff:ffff:ffff:ffff
Prefix
2a00:2380::/32
Range From
2a00:2380::
Range To
2a00:2380:ffff:ffff:ffff:ffff:ffff:ffff
Prefix
2a00:2381::/33
Range From
2a00:2381::
Range To
2a00:2381:7fff:ffff:ffff:ffff:ffff:ffff
Prefix
2a00:2381:8000::/34
Range From
2a00:2381:8000::
Range To
2a00:2381:bfff:ffff:ffff:ffff:ffff:ffff
Prefix
2a00:2381:c000::/35
Range From
2a00:2381:c000::
Range To
2a00:2381:dfff:ffff:ffff:ffff:ffff:ffff
Prefix
2a00:2381:e000::/36
Range From
2a00:2381:e000::
Range To
2a00:2381:efff:ffff:ffff:ffff:ffff:ffff
Prefix
2a00:2381:f000::/40
Range From
2a00:2381:f000::
Range To
2a00:2381:f0ff:ffff:ffff:ffff:ffff:ffff
Prefix
2a00:2381:f100::/44
Range From
2a00:2381:f100::
Range To
2a00:2381:f10f:ffff:ffff:ffff:ffff:ffff
Prefix
2a00:2381:f110::/45
Range From
2a00:2381:f110::
Range To
2a00:2381:f117:ffff:ffff:ffff:ffff:ffff
Prefix
2a00:2381:f118::/47
Range From
2a00:2381:f118::
Range To
2a00:2381:f119:ffff:ffff:ffff:ffff:ffff
Showing 10 of 73 Results View More >