Autonomous System 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 822
IPv4 addresses 702,720
IPv6 addresses 72,183,355,235,701,059,312,510,000,000,000
ASN type ISP
Registry ripe
Allocated 24 years ago on Aug 29, 2002
Updated a month ago on Mar 18, 2026

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
206.73.0.0/19 INFONET Services Corporation 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
31.95.160.0/20 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
206.73.48.0/20 Frame-Relay Serial Interfaces 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
206.73.112.0/22 PRIDE INTERNATIONAL 1,024
206.73.116.0/22 NALCO 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
203.158.68.0/23 BT Global Fabric customers 512
203.158.72.0/23 BT Global Fabric customers 512
203.158.76.0/23 BT Global Fabric customers 512
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
2001:740::/32 British Telecommunications PLC
2a00:2080::/32 BT Global Fabric Customers
2a00:2082::/32 BT Global Fabric Customers
2a00:2083::/32 BT Global Fabric Customers
2a00:2089::/32 BT Global Fabric Customers
2a00:208a::/32 BT Global Fabric Customers
2a00:208d::/32 BT Global Fabric Customers
2606:f100:d800::/38 BT Management Services
2606:f100:dc00::/38 BT Management Services
2606:f100:d000::/39 BT Management Services
2606:f100:d400::/39 BT Management Services
2606:f100:d600::/39 BT Management Services
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
2a00:2200:2000::/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 822 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 ██████████ 85
212.108.4.142 ██████████ 85
62.180.131.137 ██████████ 71
62.180.131.138 ██████████ 52
62.134.42.244 ██████████ 41
212.108.4.216 ██████████ 26
62.134.89.36 ██████████ 22
213.236.117.34 ██████████ 19
62.180.126.137 ██████████ 18
198.178.236.147 ██████████ 13

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Peers

There are 165 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 Stellantis Auto SAS
AS12956 TELXIUS Cable
AS1299 Arelion Sweden AB
AS13030 Init7 (Switzerland) Ltd.
AS13130 Autostadt GmbH
AS13205 British Telecommunications PLC
AS132203 Tencent Building, Kejizhongyi Avenue
AS13335 Cloudflare, Inc.
AS14361 HopOne Internet Corporation
AS14907 Wikimedia Foundation Inc.
AS15410 BT Limited Magyarorszagi Fioktelepe
AS15412 FLAG TELECOM UK LIMITED
AS15442 Procter & Gamble Service GmbH
AS15466 Commando Materieel en IT
AS15518 Circular Informationssysteme GmbH
AS16147 Politie Nederland
AS16839 SERVICENOW, INC.
AS174 Cogent Communications, LLC
AS1741 CSC - Tieteen tietotekniikan keskus Oy
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
AS202097 IBERMUTUA
AS202666 International Flavors & Fragrances I.F.F. (Nederland) B.V
AS203990 Accertify 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
AS24940 Hetzner Online GmbH
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 CECONOMY AG
AS2906 Netflix Streaming Services Inc.
AS29063 Eviden Netherlands B.V.
AS29119 AIRE NETWORKS DEL MEDITERRANEO SL UNIPERSONAL
AS2914 NTT America, 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 (HK) Ltd.
AS35280 F5 Networks SARL
AS3573 Accenture LLP
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 15 upstreams for this ASN.

upstreams Name
AS12956 TELXIUS Cable
AS1299 Arelion Sweden AB
AS174 Cogent Communications, LLC
AS2914 NTT America, Inc.
AS3257 GTT Communications Inc.
AS3320 Deutsche Telekom AG
AS3356 Level 3 Parent, LLC
AS3491 PCCW Global (HK) Ltd.
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 Europe Holding B.V.
AS6939 Hurricane Electric LLC
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ASN API & Database

Downstreams

There are 65 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 Stellantis Auto SAS
AS13130 Autostadt GmbH
AS13205 British Telecommunications PLC
AS15410 BT Limited Magyarorszagi Fioktelepe
AS15442 Procter & Gamble Service GmbH
AS15466 Commando Materieel en IT
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
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 CECONOMY AG
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
AS38191 Infosys Technologies Ltd
AS394805 ReliaQuest, LLC
AS40126 Molson Coors Beverage Company
AS40934 Fortinet Inc.
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
AS55290 Depository Trust & Clearing Corporation
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

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

IP Address ASN Details
166.49.239.138 AS5400 British Telecommunications PLC 0.52ms from Amsterdam, NL
212.108.17.201 AS5400 British Telecommunications PLC 0.56ms from Amsterdam, NL
213.137.180.177 AS5400 British Telecommunications PLC 1.29ms from Dublin, IE
62.134.79.0 AS5400 British Telecommunications PLC 1.09ms from Frankfurt am Main, DE
62.180.106.77 AS5400 British Telecommunications PLC 0.80ms from Frankfurt am Main, DE
2a00:2000:83::a AS5400 British Telecommunications PLC 21.17ms from Frankfurt am Main, DE
62.134.65.249 AS5400 British Telecommunications PLC 4.82ms from Frankfurt am Main, DE
80.255.160.165 AS5400 British Telecommunications PLC 5.45ms from Frankfurt am Main, DE
166.49.233.145 AS5400 British Telecommunications PLC 0.67ms from Frankfurt am Main, DE
212.127.1.19 AS5400 British Telecommunications PLC 0.39ms from London, GB
166.49.214.167 AS5400 British Telecommunications PLC 0.43ms from London, GB
166.49.250.55 AS5400 British Telecommunications PLC 0.60ms from London, GB
213.137.174.57 AS5400 British Telecommunications PLC 1.20ms from Paris, FR
213.137.170.234 AS5400 British Telecommunications PLC 1.13ms from Vienna, AT
213.137.189.130 AS5400 British Telecommunications PLC 3.59ms from Zuerich, CH
62.180.47.38 AS5400 British Telecommunications PLC 4.22ms from Amsterdam, NL
166.49.159.6 AS5400 British Telecommunications PLC 0.76ms from Amsterdam, NL
62.134.89.11 AS5400 British Telecommunications PLC 8.31ms from Frankfurt am Main, DE
62.134.207.36 AS5400 British Telecommunications PLC 1.06ms from Frankfurt am Main, DE
62.134.193.199 AS5400 British Telecommunications PLC 9.06ms from Frankfurt am Main, DE
62.134.12.25 AS5400 British Telecommunications PLC 0.68ms from Frankfurt am Main, DE
62.180.79.78 AS5400 British Telecommunications PLC 1.46ms from Frankfurt am Main, DE
213.137.182.37 AS5400 British Telecommunications PLC 1.09ms from Kloten, CH
212.21.198.121 AS5400 British Telecommunications PLC 2.94ms from Milan, IT
195.90.64.50 AS5400 British Telecommunications PLC 1.73ms from Warsaw, PL

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
120.4.67.184 AS4837 CHINA UNICOM China169 Backbone 8.64ms from Beijing, CN
52.210.29.184 AS16509 Amazon.com, Inc. 0.17ms from Dublin, IE
14.237.126.88 AS45899 VNPT Corp 2.29ms from Ho Chi Minh City, VN
119.178.122.56 AS4837 CHINA UNICOM China169 Backbone 5.44ms from Jinan, CN
209.236.237.88 AS21554 Wisconsin CyberLynk Network, Inc. 0.32ms from Milwaukee, US
198.255.136.136 AS11351 Charter Communications Inc 15.78ms from Morris Plains, US
220.227.121.232 AS18101 Reliance Communications Ltd.DAKC MUMBAI 17.94ms from Mumbai, IN
100.48.31.136 AS14618 Amazon.com, Inc. 0.19ms from Reston, US
98.51.62.24 AS7922 Comcast Cable Communications, LLC 5.73ms from Santa Clara, US
195.158.92.40 AS15735 GO p.l.c. 1.08ms from Swieqi, MT
210.236.209.40 AS23631 Sofu System, Inc 9.97ms from Tokyo, JP
41.104.92.248 AS36947 Telecom Algeria 16.17ms from Valencia, ES
86.87.207.200 AS1136 KPN B.V. 2.62ms from Amsterdam, NL
77.169.211.168 AS1136 KPN B.V. 2.33ms from Amsterdam, NL
197.49.10.24 AS8452 TE-AS 6.25ms from Cairo, EG
14.47.172.152 AS4766 Korea Telecom 1.43ms from Incheon, KR
47.151.40.72 AS5650 Frontier Communications of America, Inc. 2.22ms from Los Angeles, US
112.237.215.136 AS4837 CHINA UNICOM China169 Backbone 8.96ms from Qingdao, CN
3.92.17.88 AS14618 Amazon.com, Inc. 0.22ms from Reston, US
151.73.201.200 AS1267 WIND TRE S.P.A. 10.93ms from Rome, IT
223.143.17.232 AS17421 Mobile Business Group 6.27ms from Taipei, TW
52.196.59.8 AS16509 Amazon.com, Inc. 0.27ms from Tokyo, JP
182.118.73.152 AS4837 CHINA UNICOM China169 Backbone 1.04ms from Zhengzhou, CN
181.68.167.104 AS27831 Colombia Móvil 1.60ms from Bogota, CO
191.80.94.200 AS22927 Telefonica de Argentina 4.26ms from Buenos Aires, AR

Traceroute

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

$
traceroute -a -n -q1 -f4 212.108.2.137
traceroute to 212.108.2.137 (212.108.2.137): 64 hops max, 52 byte packets
4 [AS1299] 195.12.254.48 0.581 ms
6 [AS5400] 212.108.2.137 2.957 ms
Measurement taken from IPinfo ProbeNet in Amsterdam, NL
On

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 AS5400 at robtex.

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