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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
12,049,752
IPv4 Prefixes Announced
426
IPv6 Prefixes Announced
73
IPv4 Bogon Prefixes
0
IPv6 Bogon Prefixes
0
IPv4 Space Rank
#41 out of 75,511
Registry
Ripe
Registered Country
GB
Registration Date
2002-08-30
Registration Change
2022-09-15

Receiving From

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

Transit To

ASN
Organisation
AS12576
EE Limited
AS6871
British Telecommunications PLC
AS72
Schlumberger Limited
AS3917
Shell Information Technology International B.V.
AS11757
Whirlpool Corporation
AS33442
Zebra Technologies Corporation
AS395959
XEROX CORPORATION
AS2134
Santander Global Technology, S.L.U
AS15499
Computacenter Management GmbH trading as Computa..
AS1294
NTT DATA Services Holdings Corporation
Showing 10 of 172 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 >