AS number details

AS5400

British Telecommunications PLC  ·  bt.com

United Kingdom

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AS5400 – British Telecommunications PLC

Field Value
Country United Kingdom
Website bt.com
Hosted domains 865
Number of IPv4 697,856
Number of IPv6 72,020,256,635,525,210,942,943,799,541,760
ASN type ISP
Registry ripe
Allocated 23 years ago on Aug 29, 2002
Updated 16 days ago on Oct 16, 2025

IP Ranges

Netblock Company Num of IPs
62.134.0.0/16 British Telecommunications PLC 65,536
62.180.0.0/16 British Telecommunications PLC 65,536
195.100.0.0/16 British Telecommunications PLC 65,536
195.163.0.0/16 British Telecommunications PLC 65,536
206.73.0.0/16 INFONET Services Corporation 65,536
213.15.0.0/16 British Telecommunications PLC 65,536
62.5.0.0/17 British Telecommunications PLC 32,768
62.102.0.0/17 British Telecommunications PLC 32,768
166.49.128.0/17 communications networking services Private Unlimited Company 32,768
62.173.192.0/18 British Telecommunications PLC 16,384
212.162.192.0/18 British Telecommunications PLC 16,384
213.194.0.0/18 British Telecommunications PLC 16,384
213.236.64.0/18 British Telecommunications PLC 16,384
31.95.96.0/19 BT Global Fabric Customers 8,192
82.138.160.0/19 Amcor Flexibles Finland OY 8,192
82.150.0.0/19 British Telecommunications PLC 8,192
194.213.64.0/19 British Telecommunications PLC 8,192
195.90.64.0/19 British Telecommunications PLC 8,192
195.182.96.0/19 British Telecommunications PLC 8,192
212.8.160.0/19 British Telecommunications PLC 8,192
212.21.192.0/19 British Telecommunications PLC 8,192
212.31.192.0/19 British Telecommunications PLC 8,192
212.41.128.0/19 British Telecommunications PLC 8,192
212.108.0.0/19 British Telecommunications PLC 8,192
212.127.0.0/19 British Telecommunications PLC 8,192
213.137.160.0/19 British Telecommunications PLC 8,192
31.95.16.0/20 BT Global Fabric Customers 4,096
80.255.160.0/20 BT Global Services Luxembourg S.a.r.l 4,096
195.99.64.0/20 British Telecommunications PLC 4,096
206.73.80.0/20 INFONET BRANCH OFFICE 4,096
31.95.0.0/21 BT Global Fabric Customers 2,048
31.95.48.0/21 BT Global Fabric Customers 2,048
62.172.0.0/21 British Telecommunications PLC 2,048
132.244.64.0/21 Rolls-Royce plc 2,048
132.244.72.0/21 Rolls-Royce plc 2,048
194.74.80.0/21 British Telecommunications PLC 2,048
185.94.0.0/22 British Telecommunications PLC 1,024
195.171.36.0/22 British Telecommunications PLC 1,024
31.95.218.0/23 BT Global Fabric Customers 512
46.248.8.0/23 TNT Express ICS Limited 512
46.248.10.0/23 TNT Express ICS Limited 512
193.58.130.0/23 TESSENDERLO CHEMIE INTERNATIONAL NV 512
203.158.76.0/23 BT Global Communication India 512
8.12.61.0/24 Millward Brown, Inc. 256
80.255.160.0/24 BT Global Services Luxembourg 256
80.255.161.0/24 BT Global Services Luxembourg 256
80.255.162.0/24 BT Global Services Luxembourg 256
132.244.240.0/24 Rolls-Royce plc 256
136.238.84.0/24 Schindler Informatik AG 256
136.238.85.0/24 Schindler Informatik AG 256
136.238.224.0/24 Schindler Informatik AG 256
185.249.4.0/24 Lumileds Holding B.V. 256
192.109.52.0/24 Thales Deutschland GmbH 256
193.202.26.0/24 Kantar GmbH 256
194.33.53.0/24 KANTAR DORMANT 3 LIMITED 256
194.33.54.0/24 KANTAR DORMANT 3 LIMITED 256
194.33.55.0/24 KANTAR DORMANT 3 LIMITED 256
194.50.160.0/24 Hyundai Motor Europe GmbH 256
194.76.40.0/24 Infonet Network Services Germany 256
194.107.114.0/24 CEVA France SASU 256
195.36.82.0/24 Computacenter AG & Co. oHG, Computacenter Park 1, 50170 Kerpen 256
195.60.182.0/24 DeLaval International AB 256
195.60.183.0/24 DeLaval International AB 256
195.66.70.0/24 Kia Europe GmbH 256
198.178.236.0/24 KANTAR 256
204.52.188.0/24 KANTAR 256

Netblock Company
2a00:2000::/23 British Telecommunications PLC
2a00:2200::/25 British Telecommunications PLC
2a00:2280::/25 British Telecommunications PLC
2a00:2300::/25 British Telecommunications PLC
2a0c:7c80::/29 Thales Deutschland GmbH
2a0c:8480::/30 Hitachi Rail GTS Deutschland GmbH
2001:740::/32 British Telecommunications PLC
2a00:2200:200::/40 British Telecommunications PLC
2a00:2200:300::/40 British Telecommunications PLC
2a00:2200:900::/40 British Telecommunications PLC
2a00:2200:b00::/40 British Telecommunications PLC
2a00:2200:d00::/40 British Telecommunications PLC
2a00:2200:5300::/40 British Telecommunications PLC

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WHOIS Details

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                                                ASHandle:       AS5400
                                                OrgID:          AS5400
                                                ASName:         AS5400
                                                ASNumber:       AS5400
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
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Hosted Domains

There are 865 domain names hosted across 196 IP addresses on this ASN.

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IP Address Domain Domains on this IP
80.255.163.72 ██████████ 92
212.108.4.142 ██████████ 87
62.134.42.244 ██████████ 77
62.180.131.137 ██████████ 71
62.180.131.138 ██████████ 65
212.108.4.216 ██████████ 26
62.134.89.36 ██████████ 23
213.236.117.34 ██████████ 19
62.180.126.137 ██████████ 18
62.180.30.15 ██████████ 16

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Peers

There are 164 peers for this ASN.

Peers Name
AS10780 Pure Storage, INC.
AS11164 Internet2
AS1120 ACONET
AS12257 Dell, Inc.
AS12298 QIAGEN GmbH
AS12331 Audi AG
AS12389 PJSC Rostelecom
AS12430 VODAFONE ESPANA S.A.U.
AS12440 Hughes Network Systems GmbH
AS12552 GlobalConnect AB
AS1257 Tele2 Sverige AB
AS1267 WIND TRE S.P.A.
AS1273 Vodafone Group PLC
AS12734 FCA INFORMATION TECHNOLOGY, EXCELLENCE AND METHODS S.P.A.
AS12956 TELXIUS Cable
AS1299 Arelion Sweden AB
AS13030 Init7 (Switzerland) Ltd.
AS13130 Autostadt GmbH
AS13205 British Telecommunications PLC
AS132203 Tencent Building, Kejizhongyi Avenue
AS132876 Symphony Communication (Thailand) PCL.
AS13335 Cloudflare, Inc.
AS14361 HopOne Internet Corporation
AS14907 Wikimedia Foundation Inc.
AS15410 BT Limited Magyarorszagi Fioktelepe
AS15412 FLAG TELECOM UK LIMITED
AS15466 Defensie Telematica Organisatie
AS15518 Circular Informationssysteme GmbH
AS16147 Politie Nederland
AS16839 SERVICENOW, INC.
AS174 Cogent Communications, LLC
AS1828 Unitas Global
AS1836 green.ch AG
AS1853 ACONET
AS19151 BroadbandONE, LLC
AS1955 KIFU (Governmental Info Tech Development Agency)
AS199524 G-Core Labs S.A.
AS199541 EUROCONTROL, the European Organisation for the Safety of Air Navigation
AS200361 CONCENTRIX SERVICES BULGARIA EOOD
AS200500 Vesta Payment Solutions Limited
AS202097 IBERMUTUA
AS202666 International Flavors & Fragrances I.F.F. (Nederland) B.V
AS203990 Accertify LLC
AS20473 The Constant Company, LLC
AS20485 Joint Stock Company TransTeleCom
AS20561 Schaeffler Technologies AG & Co. KG
AS206625 Enterprise Holdings, Inc.
AS207180 HCL Technologies Germany GmbH
AS208053 Clarins SAS
AS20868 ABB Information Systems Ltd
AS20940 Akamai International B.V.
AS21000 Atos France SAS
AS2110 Enet Communications LIMITED
AS212565 Specsavers Optical Group Limited
AS21277 Allay Nawroz Telecom Company for Communication/Ltd.
AS21320 GEANT Vereniging
AS21489 The North Atlantic Treaty Organization
AS22683 PHILIPS INTERNET
AS23764 CTGNet
AS24961 WIIT AG
AS2497 Internet Initiative Japan Inc.
AS25049 Shell Information Technology International B.V.
AS2516 KDDI CORPORATION
AS25261 IBERIA LINEAS AEREAS DE ESPANA SOCIEDAD ANONIMA OPERADORA
AS26380 MasterCard Technologies LLC
AS2686 AT&T Enterprises, LLC
AS27311 Biogen MA Inc
AS2856 British Telecommunications PLC
AS286 GTT Communications Inc.
AS28879 Media-Saturn-Holding GmbH
AS29063 Eviden Netherlands B.V.
AS29119 AIRE NETWORKS DEL MEDITERRANEO SL UNIPERSONAL
AS30103 Zoom Video Communications, Inc
AS30614 Dell, Inc.
AS30781 Free Pro SAS
AS30864 Elavon Financial Services DAC
AS31027 GlobalConnect A/S
AS31614 European Central Bank
AS3257 GTT Communications Inc.
AS32590 Valve Corporation
AS3303 Swisscom (Switzerland) Ltd
AS3320 Deutsche Telekom AG
AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
AS3356 Level 3 Parent, LLC
AS33873 Arvato Systems GmbH
AS33891 Core-Backbone GmbH
AS34311 LG CNS Europe B.V
AS34460 PHOENIX International Holdings GmbH
AS3491 PCCW Global, Inc.
AS35280 F5 Networks SARL
AS3573 Accenture LLP
AS35736 EE Limited
AS37100 SEACOM Limited
AS37468 Angola Cables
AS38191 Infosys Technologies Ltd
AS39351 31173 Services AB
AS394805 ReliaQuest, LLC
AS39737 Prime Telecom srl
AS40126 Molson Coors Beverage Company
AS40934 Fortinet Inc.
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ASN API & Database

Upstreams

There are 14 upstreams for this ASN.

upstreams Name
AS12956 TELXIUS Cable
AS1299 Arelion Sweden AB
AS174 Cogent Communications, LLC
AS3257 GTT Communications Inc.
AS3320 Deutsche Telekom AG
AS3356 Level 3 Parent, LLC
AS3491 PCCW Global, Inc.
AS4637 Telstra Global
AS5511 Orange S.A.
AS6453 TATA COMMUNICATIONS (AMERICA) INC
AS6461 Zayo Bandwidth
AS6762 TELECOM ITALIA SPARKLE S.p.A.
AS6830 Liberty Global B.V.
AS6939 Hurricane Electric LLC
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ASN API & Database

Downstreams

There are 66 downstreams for this ASN.

Downstreams Name
AS10780 Pure Storage, INC.
AS12257 Dell, Inc.
AS12298 QIAGEN GmbH
AS12331 Audi AG
AS12440 Hughes Network Systems GmbH
AS12734 FCA INFORMATION TECHNOLOGY, EXCELLENCE AND METHODS S.P.A.
AS13130 Autostadt GmbH
AS13205 British Telecommunications PLC
AS15410 BT Limited Magyarorszagi Fioktelepe
AS15466 Defensie Telematica Organisatie
AS15518 Circular Informationssysteme GmbH
AS16839 SERVICENOW, INC.
AS174 Cogent Communications, LLC
AS199541 EUROCONTROL, the European Organisation for the Safety of Air Navigation
AS200361 CONCENTRIX SERVICES BULGARIA EOOD
AS200500 Vesta Payment Solutions Limited
AS202097 IBERMUTUA
AS202666 International Flavors & Fragrances I.F.F. (Nederland) B.V
AS203990 Accertify LLC
AS20561 Schaeffler Technologies AG & Co. KG
AS206625 Enterprise Holdings, Inc.
AS207180 HCL Technologies Germany GmbH
AS208053 Clarins SAS
AS20868 ABB Information Systems Ltd
AS21000 Atos France SAS
AS2110 Enet Communications LIMITED
AS212565 Specsavers Optical Group Limited
AS21489 The North Atlantic Treaty Organization
AS22683 PHILIPS INTERNET
AS25049 Shell Information Technology International B.V.
AS25261 IBERIA LINEAS AEREAS DE ESPANA SOCIEDAD ANONIMA OPERADORA
AS26380 MasterCard Technologies LLC
AS27311 Biogen MA Inc
AS2856 British Telecommunications PLC
AS28879 Media-Saturn-Holding GmbH
AS29063 Eviden Netherlands B.V.
AS30614 Dell, Inc.
AS30864 Elavon Financial Services DAC
AS31614 European Central Bank
AS3356 Level 3 Parent, LLC
AS33873 Arvato Systems GmbH
AS34311 LG CNS Europe B.V
AS34460 PHOENIX International Holdings GmbH
AS3573 Accenture LLP
AS35736 EE Limited
AS38191 Infosys Technologies Ltd
AS394805 ReliaQuest, LLC
AS40126 Molson Coors Beverage Company
AS40999 dus.net GmbH
AS41321 Fsas Technologies GmbH
AS42848 European Commission
AS43033 Telio Communications GmbH
AS43949 Marsh Limited
AS48647 Solvay SA
AS5091 Stripe, Inc.
AS51046 Bringo Limited
AS51466 Bridgestone Europe NV
AS51527 AUTOEVER EUROPE
AS59724 Elsevier Limited
AS60112 Clarins SAS
AS72 Schlumberger Limited
AS7246 Bristol-Myers Squibb Company
AS7734 Toronto Dominion Bank
AS8590 Bayerische Motoren Werke Aktiengesellschaft
AS8903 LYNTIA NETWORKS S.A.
AS8968 BT Italia S.p.A.
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ASN API & Database

Pingable IPs

447 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
212.108.13.149 AS5400 British Telecommunications PLC 0.99ms from Amsterdam, NL
185.249.4.2 AS5400 British Telecommunications PLC 2.81ms from Amsterdam, NL
195.100.192.190 AS5400 British Telecommunications PLC 1.70ms from Amsterdam, NL
82.150.16.201 AS5400 British Telecommunications PLC 1.20ms from Aubervilliers, FR
82.150.30.241 AS5400 British Telecommunications PLC 21.13ms from Aubervilliers, FR
195.100.182.0 AS5400 British Telecommunications PLC 1.40ms from Aubervilliers, FR
2a00:2000:0:8080::12 AS5400 British Telecommunications PLC 0.63ms from Frankfurt am Main, DE
195.100.130.49 AS5400 British Telecommunications PLC 0.66ms from Frankfurt am Main, DE
62.134.80.126 AS5400 British Telecommunications PLC 1.09ms from Frankfurt am Main, DE
62.134.53.10 AS5400 British Telecommunications PLC 0.53ms from Frankfurt am Main, DE
62.180.229.89 AS5400 British Telecommunications PLC 0.77ms from Frankfurt am Main, DE
62.134.200.57 AS5400 British Telecommunications PLC 0.49ms from Frankfurt am Main, DE
62.134.14.1 AS5400 British Telecommunications PLC 7.44ms from Frankfurt am Main, DE
166.49.173.217 AS5400 British Telecommunications PLC 1.40ms from Kloten, CH
62.173.202.233 AS5400 British Telecommunications PLC 5.04ms from London, GB
212.127.11.24 AS5400 British Telecommunications PLC 0.60ms from London, GB
166.49.225.33 AS5400 British Telecommunications PLC 1.27ms from Madrid, ES
166.49.144.17 AS5400 British Telecommunications PLC 1.07ms from Madrid, ES
212.21.193.94 AS5400 British Telecommunications PLC 1.44ms from Milan, IT
195.100.131.129 AS5400 British Telecommunications PLC 0.81ms from Warsaw, PL
62.180.94.1 AS5400 British Telecommunications PLC 4.39ms from Amsterdam, NL
62.102.104.46 AS5400 British Telecommunications PLC 4.38ms from Amsterdam, NL
212.108.22.49 AS5400 British Telecommunications PLC 0.92ms from Amsterdam, NL
212.108.19.12 AS5400 British Telecommunications PLC 1.35ms from Amsterdam, NL
166.49.130.105 AS5400 British Telecommunications PLC 1.01ms from Aubervilliers, FR

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address ASN Details
178.222.7.168 AS8400 TELEKOM SRBIJA a.d. 1.14ms from Belgrade, RS
159.218.200.8 AS399569 Vincennes University 7.34ms from Chicago, US
18.190.92.120 AS16509 Amazon.com, Inc. 0.14ms from Columbus, US
113.172.186.184 AS45899 VNPT Corp 1.71ms from Ho Chi Minh City, VN
154.221.119.216 AS134175 SH2206-AP 0.72ms from Hong Kong, HK
23.1.249.152 AS16625 Akamai Technologies, Inc. 0.16ms from Madrid, ES
213.103.71.8 AS1257 Tele2 Sverige AB 17.45ms from Riga, LV
206.225.169.40 AS715 WoodyNet, Inc. 9.02ms from Santa Clara, US
79.166.220.40 AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA 5.14ms from Sofia, BG
68.10.153.184 AS22773 Cox Communications Inc. 10.71ms from Ashburn, US
79.107.11.168 AS25472 Nova Telecommunications & Media Single Member S.A 15.53ms from Athens, GR
75.240.21.184 AS6167 Verizon Business 19.15ms from Chicago, US
212.181.170.72 AS3301 Telia Company AB 4.24ms from Copenhagen, DK
91.210.219.120 AS47530 Novokuznetsk Telecom Ltd 4.14ms from Kemerovo, RU
176.206.19.104 AS1267 WIND TRE S.P.A. 7.86ms from Milan, IT
223.196.4.152 AS55644 Vodafone Idea Ltd 1.18ms from Mumbai, IN
91.13.143.168 AS3320 Deutsche Telekom AG 1.59ms from Nuernberg, DE
4.229.112.120 AS8075 Microsoft Corporation 0.19ms from Quebec, CA
82.57.227.24 AS3269 Telecom Italia S.p.A. 7.98ms from Rome, IT
182.210.76.72 AS17858 LG POWERCOMM 1.97ms from Seoul, KR
183.99.26.152 AS4766 Korea Telecom 1.77ms from Seoul, KR
45.235.194.56 AS262777 Neolink Telecomunicações LTDA 5.48ms from São Paulo, BR
20.126.131.8 AS8075 Microsoft Corporation 0.28ms from Amsterdam, NL
118.118.119.200 AS4134 CHINANET-BACKBONE 4.93ms from Beijing, CN
93.87.127.168 AS8400 TELEKOM SRBIJA a.d. 0.94ms from Belgrade, RS

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

$
traceroute -a -n -q1 -f6 212.41.146.89
traceroute to 212.41.146.89 (212.41.146.89): 64 hops max, 52 byte packets
6 [AS5400] 212.41.146.89 0.988 ms
Measurement taken from IPinfo ProbeNet in Amsterdam, NL
On

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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 AS5400 at robtex.

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