AS number details

AS2856

British Telecommunications PLC  ·  bt.com

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AS2856 – British Telecommunications PLC

Field Value
Country United Kingdom
Website bt.com
Hosted domains 30,440
Number of IPv4 12,265,984
Number of IPv6 10,141,208,428,603,294,055,861,149,761,536
ASN type ISP
Registry ripe
Allocated 22 years ago on Aug 30, 2002
Updated 2 years ago on Sep 15, 2022

IP Ranges

Netblock Company Num of IPs
109.144.0.0/12 British Telecommunications PLC 1,048,576
109.180.0.0/15 EE Limited 131,072
109.205.158.0/24 BONTBLOCK 256
116.66.140.0/22 Cognizant Technology Solution India Pvt Ltd, India Net block 1,024
132.146.0.0/16 British Telecom 65,536
132.153.244.0/24 Atomic Weapons Establishment 256
132.153.245.0/24 Atomic Weapons Establishment 256
132.153.246.0/24 Atomic Weapons Establishment 256
132.153.247.0/24 Atomic Weapons Establishment 256
132.153.248.0/24 Atomic Weapons Establishment 256
132.153.249.0/24 Atomic Weapons Establishment 256
132.153.250.0/24 Atomic Weapons Establishment 256
132.153.251.0/24 Atomic Weapons Establishment 256
132.153.252.0/24 Atomic Weapons Establishment 256
132.153.253.0/24 Atomic Weapons Establishment 256
132.153.254.0/24 Atomic Weapons Establishment 256
132.153.3.0/24 Atomic Weapons Establishment 256
138.108.94.0/24 Nielsen Consumer LLC 256
142.205.161.0/24 Toronto Dominion Bank 256
142.205.162.0/23 Toronto Dominion Bank 512
144.177.74.0/23 AKER SOLUTIONS ASA 512
144.87.0.0/21 Royal Mail Group Limited 2,048
144.87.128.0/18 Royal Mail Group Limited 16,384
144.87.16.0/20 Royal Mail Group Limited 4,096
144.87.24.0/21 Royal Mail Group Limited 2,048
144.87.24.0/22 Royal Mail Group Limited 1,024
144.87.28.0/22 Royal Mail Group Limited 1,024
147.148.0.0/14 British Telecommunications plc 262,144
147.152.0.0/16 British Telecommunications plc 65,536
147.189.68.0/22 FTIP003165225 1,024
147.189.76.0/22 FTIP003902813 1,024
147.78.68.0/22 Hop Bilisim Teknolojileri Anonim Sirketi 1,024
148.252.3.0/24 Department for Environment, Food and Rural Affairs 256
148.252.7.0/24 Department for Environment, Food and Rural Affairs 256
148.253.220.0/23 Department for Environment, Food and Rural Affairs 512
149.117.130.0/24 Synopsys Inc. 256
149.223.0.0/16 ZF Friedrichshafen AG 65,536
15.145.20.0/22 Amazon Data Services UK 1,024
152.114.195.0/24 ZELLIS UK LIMITED 256
152.114.196.0/24 ZELLIS UK LIMITED 256
152.114.201.0/24 ZELLIS UK LIMITED 256
152.114.204.0/23 ZELLIS UK LIMITED 512
152.114.206.0/23 ZELLIS UK LIMITED 512
152.114.208.0/24 ZELLIS UK LIMITED 256
152.114.209.0/24 ZELLIS UK LIMITED 256
152.114.210.0/24 ZELLIS UK LIMITED 256
152.114.220.0/23 ZELLIS UK LIMITED 512
152.114.222.0/23 ZELLIS UK LIMITED 512
156.146.3.0/24 Kate Spade Holdings LLC 256
157.236.254.0/23 Avon & Somerset Constabulary 512
157.236.254.0/24 Avon & Somerset Constabulary 256
157.236.255.0/24 Avon & Somerset Constabulary 256
159.180.96.0/19 BT-CENTRAL-PLUS 8,192
159.197.13.0/24 4000 Parkway 256
159.197.44.0/24 4000 Parkway 256
159.197.45.0/24 4000 Parkway 256
159.253.66.0/23 Technology Business centre #753 512
163.5.115.0/24 Private Customer 256
163.5.122.0/24 Private Customer 256
163.5.208.0/24 Private Customer 256
163.5.217.0/24 Private Customer 256
163.5.222.0/24 Private Customer 256
163.5.249.0/24 Private Customer 256
163.5.37.0/24 Private Customer 256
163.5.67.0/24 Private Customer 256
163.5.98.0/24 Private Customer 256
164.134.134.0/24 NHS National Services Scotland 256
164.134.135.0/24 NHS National Services Scotland 256
164.134.136.0/24 NHS National Services Scotland 256
164.134.137.0/24 NHS National Services Scotland 256
164.134.138.0/24 NHS National Services Scotland 256
164.38.120.0/22 Currys Retail Ltd. 1,024
164.38.12.0/24 Currys Retail Ltd. 256
164.38.134.0/24 Currys Retail Ltd. 256
164.38.148.0/24 Currys Retail Ltd. 256
164.38.149.0/24 Currys Retail Ltd. 256
164.38.156.0/24 Currys Retail Ltd. 256
164.38.16.0/22 Currys Retail Ltd. 1,024
164.38.184.0/22 Currys Retail Ltd. 1,024
164.38.196.0/24 Currys Retail Ltd. 256
164.38.197.0/24 Currys Retail Ltd. 256
164.38.2.0/24 Currys Retail Ltd. 256
164.38.31.0/24 Currys Retail Ltd. 256
164.38.32.0/24 Currys Retail Ltd. 256
164.38.33.0/24 Currys Retail Ltd. 256
164.38.34.0/24 Currys Retail Ltd. 256
165.120.0.0/16 BT Public Internet Service 65,536
178.212.56.0/23 Volta Central London's Data Centre 512
178.78.106.0/23 Eclipse Internet - Bluewave Internet Limted #683 512
178.78.108.0/22 BSi #349 1,024
178.78.112.0/21 KCOM BT sub-allocation 2,048
178.78.120.0/21 KCOM BT sub-allocation 2,048
185.119.110.0/24 Grid Hosting Limited 256
185.128.205.0/24 Sagentia Ltd 256
185.149.6.0/24 Avis Budget Services Ltd. 256
185.156.48.0/24 Cheshire Datasystems Limited 256
185.177.64.0/23 Leidos Innovations UK LTD 512
185.58.165.0/24 NHS National Services Scotland 256
185.68.200.0/22 Nibs Solutions Ltd 1,024
185.90.32.0/22 BI Worldwide Ltd 1,024

The list on this page is limited to 100 results. The totality of IPv4 ranges for this ASN is available through our ASN & IP Ranges APIs.

Netblock Company
2001:4878:c259::/48 Akamai Technologies, Inc.
2a00:2380::/25 British Telecom BTnet Management container
2a01:4c8:f401::/48 EE Limited
2a03:1e82:90ff::/48 Bayerische Motoren Werke Aktiengesellschaft
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WHOIS Details

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ASHandle:       AS2856
OrgID:          AS2856
ASName:         AS2856
ASNumber:       AS2856
RegDate:        0000-00-00
Updated:        0000-00-00
TechHandle:     AA00-AAAA
Source:         AAAA
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Hosted Domains

There are 30,440 domain names hosted across 11,165 IP addresses on this ASN.

Join for free to explore hosted domains ›
IP Address Domain Domains on this IP
213.1.238.126 ██████████ 1,406
213.123.60.239 ██████████ 1,185
81.145.31.210 ██████████ 881
194.72.108.26 ██████████ 673
194.73.113.100 ██████████ 421
213.1.214.237 ██████████ 358
213.1.214.233 ██████████ 347
213.1.214.231 ██████████ 269
194.72.181.121 ██████████ 265
81.145.16.13 ██████████ 262

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Peers

There are 247 peers for this ASN.

Peers Name
AS11031 Orbis Investments (Canada) Limited
AS11528 Photronics Inc.
AS11939 THE MATHWORKS, INC.
AS12200 Rackspace Hosting
AS12222 Akamai Technologies, Inc.
AS12440 Hughes Network Systems GmbH
AS12576 EE Limited
AS1267 WIND TRE S.P.A.
AS12713 OTEGlobe
AS1294 NTT DATA Services Holdings Corporation
AS13030 Init7 (Switzerland) Ltd.
AS13037 Zen Internet Ltd
AS131993 QUINNOX-IN
AS13205 British Telecommunications PLC
AS13213 UK-2 Limited
AS13237 euNetworks GmbH
AS13458 Davidson Kempner Capital Management LLC
AS137409 GSL Networks Pty LTD
AS14630 Invesco Group Services, Inc.
AS14766 Magnetar Capital LLC
AS14931 The St. Paul Travelers Companies, Inc.
AS15141 Bausch & Lomb
AS15248 Metaswitch Networks Corp.
AS15412 FLAG TELECOM UK LIMITED
AS15499 Computacenter Management GmbH trading as Computacenter AG & Co.oHG
AS15557 Societe Francaise Du Radiotelephone - SFR SA
AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
AS15865 Elliott Advisors UK (Ltd)
AS16265 LeaseWeb Network B.V.
AS16276 OVH SAS
AS16477 Nielsen Consumer LLC
AS16525 KBR
AS1680 Cellcom Fixed Line Communication L.P
AS16839 SERVICENOW, INC.
AS17274 Robert W. Baird & Co. Incorporated
AS17639 Converge ICT Solutions Inc.
AS17903 Cognizant Technology Solutions India Pvt Ltd,
AS1828 Unitas Global
AS19305 Transaction Network Services, Inc.
AS19428 Phillips 66 Company
AS19551 Incapsula Inc
AS197085 Sykes Global Services Ltd
AS197122 TENERITY LIMITED
AS197409 Co-operative Group Limited
AS197568 PINNACLE INSURANCE MANAGEMENT SERVICES PLC
AS198032 Cambridge Assessment
AS19812 BT Americas, Inc
AS198300 FES Ltd
AS198386 THRIVE OPERATIONS LIMITED
AS199262 Transport for London
AS199524 G-Core Labs S.A.
AS200614 Veritas Technologies (UK) Limited
AS200961 FIL INVESTMENT MANAGEMENT LIMITED
AS201529 Orchid Cellmark Ltd
AS201536 Sandyx Systems Limited
AS20163 Sunrise Medical, Inc.
AS202161 M&G INVESTMENT MANAGEMENT LIMITED
AS202206 FAT MEDIA LTD
AS202275 Gaming Technology Solutions Ltd.
AS202466 QBE Management Services (UK) Limited
AS202679 Deltatre Limited
AS202787 Withers LLP
AS203171 Chi Technology Ltd
AS204322 New York Times Limited
AS204550 Continental Limited
AS20464 HP Inc.
AS20473 The Constant Company, LLC
AS204819 WPM Software Ltd
AS205006 Holland & Barrett International Limited
AS205114 The WEST Retail group LImited
AS205514 CORVID Protect Holdings Limited
AS205693 Driver & Vehicle Licensing Agency
AS206051 ARAMARK N.V
AS206132 ABBOTT RAPID DX INTERNATIONAL LIMITED
AS206146 PAYSEND TECHNOLOGY LIMITED
AS206166 Schroder Investment Management Limited
AS206237 Barclays Bank PLC
AS206467 Protech Communications Ltd
AS206686 Nominet UK
AS20695 Capital One (Europe) Plc
AS20705 HSBC Bank plc
AS207087 Pay360 Ltd
AS207312 BluJay Solutions Ltd
AS207552 Cambridge Consultants Limited
AS20860 IOMART CLOUD SERVICES LIMITED
AS209258 TSYS Europe (Netherlands) B.V.
AS20940 Akamai International B.V.
AS209997 SECURITAS TECHNOLOGY LIMITED
AS21054 Natwest Markets PLC
AS210988 London Borough Of Hammersmith & Fulham
AS21110 Entain Corporate Services Limited
AS211303 Electronic Arts Limited
AS211389 Briant Broadband Limited
AS2119 Telenor Norge AS
AS21218 EBC Group (UK) Ltd
AS212329 Netcraft Ltd
AS212565 Specsavers Optical Group Limited
AS212655 YouFibre Limited
AS21296 Pricewaterhousecoopers Services Limited
AS21301 Natwest Markets PLC
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ASN API ASN Database Download

Upstreams

There are 2 upstreams for this ASN.

upstreams Name
AS5400 British Telecommunications PLC
AS6461 Zayo Bandwidth
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ASN API ASN Database Download

Downstreams

There are 155 downstreams for this ASN.

Downstreams Name
AS11031 Orbis Investments (Canada) Limited
AS11528 Photronics Inc.
AS11939 THE MATHWORKS, INC.
AS12222 Akamai Technologies, Inc.
AS12440 Hughes Network Systems GmbH
AS1294 NTT DATA Services Holdings Corporation
AS131993 QUINNOX-IN
AS13205 British Telecommunications PLC
AS13458 Davidson Kempner Capital Management LLC
AS14630 Invesco Group Services, Inc.
AS14766 Magnetar Capital LLC
AS14931 The St. Paul Travelers Companies, Inc.
AS15141 Bausch & Lomb
AS15248 Metaswitch Networks Corp.
AS15499 Computacenter Management GmbH trading as Computacenter AG & Co.oHG
AS15865 Elliott Advisors UK (Ltd)
AS16477 Nielsen Consumer LLC
AS16525 KBR
AS17274 Robert W. Baird & Co. Incorporated
AS17903 Cognizant Technology Solutions India Pvt Ltd,
AS19305 Transaction Network Services, Inc.
AS19428 Phillips 66 Company
AS197085 Sykes Global Services Ltd
AS197122 TENERITY LIMITED
AS197409 Co-operative Group Limited
AS197568 PINNACLE INSURANCE MANAGEMENT SERVICES PLC
AS19812 BT Americas, Inc
AS198300 FES Ltd
AS198386 THRIVE OPERATIONS LIMITED
AS199262 Transport for London
AS200614 Veritas Technologies (UK) Limited
AS200961 FIL INVESTMENT MANAGEMENT LIMITED
AS201529 Orchid Cellmark Ltd
AS201536 Sandyx Systems Limited
AS20163 Sunrise Medical, Inc.
AS202161 M&G INVESTMENT MANAGEMENT LIMITED
AS202206 FAT MEDIA LTD
AS202679 Deltatre Limited
AS203171 Chi Technology Ltd
AS204322 New York Times Limited
AS204550 Continental Limited
AS20464 HP Inc.
AS204819 WPM Software Ltd
AS205006 Holland & Barrett International Limited
AS205114 The WEST Retail group LImited
AS205514 CORVID Protect Holdings Limited
AS205693 Driver & Vehicle Licensing Agency
AS206051 ARAMARK N.V
AS206132 ABBOTT RAPID DX INTERNATIONAL LIMITED
AS206146 PAYSEND TECHNOLOGY LIMITED
AS206166 Schroder Investment Management Limited
AS206237 Barclays Bank PLC
AS206467 Protech Communications Ltd
AS206686 Nominet UK
AS20695 Capital One (Europe) Plc
AS20705 HSBC Bank plc
AS207087 Pay360 Ltd
AS207312 BluJay Solutions Ltd
AS207552 Cambridge Consultants Limited
AS209258 TSYS Europe (Netherlands) B.V.
AS209997 SECURITAS TECHNOLOGY LIMITED
AS21054 Natwest Markets PLC
AS210988 London Borough Of Hammersmith & Fulham
AS21110 Entain Corporate Services Limited
AS211303 Electronic Arts Limited
AS211389 Briant Broadband Limited
AS21218 EBC Group (UK) Ltd
AS212329 Netcraft Ltd
AS212565 Specsavers Optical Group Limited
AS21296 Pricewaterhousecoopers Services Limited
AS21301 Natwest Markets PLC
AS2134 Santander Global Technology, S.L.U
AS21369 Atos IT Services UK Ltd
AS21433 Accenture UK Limited
AS21464 EDF Trading Ltd
AS21470 South West Communications Group Ltd
AS215662 KENSINGTON MORTGAGE COMPANY LIMITED
AS21758 Modine Manufacturing Company
AS21874 MMC
AS22775 Moore Capital Management
AS24775 Qinetiq Limited
AS25049 Shell Information Technology International B.V.
AS25050 VOCALINK LTD
AS25343 Coventry University Computing Services
AS2535 BP America, Inc.
AS25421 John Lewis Plc.
AS25585 Kencomp Internet Ltd
AS2559 VISA INTERNATIONAL SERVICE ASSOCIATION
AS27447 Schulte Roth & Zabel LLP
AS28863 Thales UK Limited
AS29033 Eckoh UK Limited
AS29888 Unum Group
AS31003 Iron Mountain Europe (Group) Limited
AS31632 OAG Aviation WorldWide Limited
AS33001 Cravath, Swaine & Moore LLP
AS33127 Integrated Systems Corp
AS33442 Zebra Technologies Corporation
AS33680 TELEPERFORMANCE USA
AS33981 Total System Services Processing Europe Limited
AS35350 UCB Pharma S.A.
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ASN API ASN Database Download

Related Networks

What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS2856 at robtex.

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