Autonomous System details

AS5400

British Telecommunications PLC  ·  bt.com

United Kingdom

Need more data or want to access it via API or data downloads? Sign up to get free access

Sign up for free ›

AS5400 – British Telecommunications PLC

Field Value
Country United Kingdom
Website bt.com
Hosted domains 822
IPv4 addresses 697,600
IPv6 addresses 72,020,566,120,535,032,288,012,524,322,816
ASN type ISP
Registry ripe
Allocated 23 years ago on Aug 29, 2002
Updated 4 months 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 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
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
2a00:2200:2000::/40 British Telecommunications PLC
2a00:2200:5300::/40 British Telecommunications PLC

Get this data and more with IPinfo's powerful IP Ranges API - quickly and easily identify company-owned IP ranges.
IP Ranges API

WHOIS Details

Join for free to view WHOIS details › 

                                                ASHandle:       AS5400
                                                OrgID:          AS5400
                                                ASName:         AS5400
                                                ASNumber:       AS5400
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
Get this data and more with IPinfo's WHOIS product - effortless access to POCs, ORGs, and Networks, for actionable intelligence.
IP WHOIS API & Database

Hosted Domains

There are 822 domain names hosted across 196 IP addresses on this ASN.

Join for free to explore hosted domains ›
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 ██████████ 65
62.134.42.244 ██████████ 60
212.108.4.216 ██████████ 26
62.134.89.36 ██████████ 23
213.236.117.34 █████████ 19
62.180.126.137 ██████████ 18
198.178.236.147 ██████████ 13

Discover all domains hosted on a single IP address with IPinfo's powerful Hosted Domains (Reverse IP) solution.
Useful for Cybersecurity
Hosted Domains API & Database

Peers

There are 167 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
AS15466 Commando Materieel en IT
AS15518 Circular Informationssysteme GmbH
AS16147 Politie Nederland
AS16509 Amazon.com, Inc.
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
AS200500 Vesta Payment Solutions Limited
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.
AS20676 Plusnet GmbH
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
AS2906 Netflix Streaming Services Inc.
AS29063 Eviden Netherlands B.V.
AS29119 AIRE NETWORKS DEL MEDITERRANEO SL UNIPERSONAL
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
AS3549 Level 3 Parent, LLC
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
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.
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 Europe Holding B.V.
AS6939 Hurricane Electric LLC
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.
ASN API & Database

Downstreams

There are 67 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
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
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
AS38191 Infosys Technologies Ltd
AS394805 ReliaQuest, LLC
AS40126 Molson Coors Beverage Company
AS40934 Fortinet Inc.
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
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.
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.
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
213.194.0.145 AS5400 British Telecommunications PLC 7.13ms from Frankfurt am Main, DE
62.134.68.36 AS5400 British Telecommunications PLC 4.10ms from Frankfurt am Main, DE
166.49.228.233 AS5400 British Telecommunications PLC 0.70ms from Frankfurt am Main, DE
62.134.207.0 AS5400 British Telecommunications PLC 1.07ms from Frankfurt am Main, DE
62.173.196.221 AS5400 British Telecommunications PLC 6.26ms from London, GB
212.127.1.19 AS5400 British Telecommunications PLC 0.33ms from London, GB
132.244.79.167 AS5400 British Telecommunications PLC 8.64ms from London, GB
212.31.207.194 AS5400 British Telecommunications PLC 12.26ms from Madrid, ES
213.194.40.201 AS5400 British Telecommunications PLC 16.38ms from Milan, IT
213.194.47.249 AS5400 British Telecommunications PLC 17.45ms from Milan, IT
195.100.50.132 AS5400 British Telecommunications PLC 0.66ms from Paris, FR
185.249.4.2 AS5400 British Telecommunications PLC 2.81ms from Amsterdam, NL
195.100.198.218 AS5400 British Telecommunications PLC 0.76ms from Amsterdam, NL
213.194.44.36 AS5400 British Telecommunications PLC 4.43ms from Amsterdam, NL
212.8.185.241 AS5400 British Telecommunications PLC 4.12ms from Amsterdam, NL
212.41.136.230 AS5400 British Telecommunications PLC 0.89ms from Amsterdam, NL
193.58.130.10 AS5400 British Telecommunications PLC 7.46ms from Amsterdam, NL
166.49.145.145 AS5400 British Telecommunications PLC 0.69ms from Frankfurt am Main, DE
62.134.200.56 AS5400 British Telecommunications PLC 0.54ms from Frankfurt am Main, DE
62.134.52.145 AS5400 British Telecommunications PLC 0.68ms from Frankfurt am Main, DE
62.180.237.139 AS5400 British Telecommunications PLC 0.49ms from Frankfurt am Main, DE
62.134.2.101 AS5400 British Telecommunications PLC 1.03ms from Frankfurt am Main, DE
62.134.157.177 AS5400 British Telecommunications PLC 0.57ms from Frankfurt am Main, DE
212.127.4.69 AS5400 British Telecommunications PLC 0.98ms from London, GB
212.127.3.179 AS5400 British Telecommunications PLC 2.95ms from London, GB

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
66.198.11.200 AS6453 TATA COMMUNICATIONS (AMERICA) INC 0.21ms from Ashburn, US
64.250.115.136 AS23367 Adaptive Data Networks, LLC 1.38ms from Atlanta, US
89.18.13.200 AS39737 Prime Telecom srl 0.33ms from Bucharest, RO
72.182.110.136 AS11427 Charter Communications Inc 4.92ms from Dallas, US
66.52.161.56 AS20115 Charter Communications LLC 9.43ms from Dallas, US
199.58.188.200 AS283 MPower Labs, Inc. 5.02ms from Dallas, US
142.67.233.168 AS11260 EastLink 14.09ms from Fredericton, CA
118.178.33.56 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 3.97ms from Hangzhou, CN
81.197.235.152 AS719 Elisa Oyj 0.74ms from Helsinki, FI
162.127.13.8 AS11714 Network Nebraska 16.32ms from Lincoln, US
87.5.234.24 AS3269 Telecom Italia S.p.A. 4.91ms from Milan, IT
172.69.86.248 AS13335 Cloudflare, Inc. 0.58ms from Mumbai, IN
118.211.100.216 AS7545 TPG Telecom Limited 5.21ms from Sydney, AU
92.96.156.136 AS5384 Emirates Internet 6.19ms from Al Fujairah City, AE
2.61.90.232 AS12389 PJSC Rostelecom 8.86ms from Krasnoyarsk, RU
95.60.147.88 AS12430 VODAFONE ESPANA S.A.U. 8.09ms from Madrid, ES
75.152.10.168 AS852 TELUS Communications Inc. 9.31ms from Montreal, CA
23.39.170.8 AS20940 Akamai International B.V. 0.85ms from New York City, US
24.190.196.200 AS6128 Cablevision Systems Corp. 2.55ms from New York City, US
58.85.180.232 AS9617 JCOM Co., Ltd. 3.37ms from Osaka, JP
3.228.84.40 AS14618 Amazon.com, Inc. 0.22ms from Reston, US
172.184.139.40 AS8075 Microsoft Corporation 0.57ms from San Jose, US
178.112.120.200 AS25255 ==> TELE2 AUSTRIA <== 13.47ms from Vienna, AT
94.152.61.8 AS29522 Cyber_Folks S.A. 4.80ms from Warsaw, PL
210.35.24.136 AS4538 China Education and Research Network Center 14.33ms from Wuhan, CN

Traceroute

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

$
traceroute -a -n -q1 -f4 -m8 213.194.56.161
traceroute to 213.194.56.161 (213.194.56.161): 8 hops max, 52 byte packets
4 [AS3491] 63.218.230.110 108.617 ms
5 [AS5400] 166.49.154.246 107.503 ms
6 *
7 *
8 *
Measurement taken from IPinfo ProbeNet in Accra, GH
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.

Data built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales
IPinfo for all your IP geolocation needs

Our IP tools

Explore all tools
What is my IP

What is my IP

Test our data accuracy by viewing insights from your IP address.

See your IP address
Map IPs

Map IPs

Paste up to 500,000 IPs to see where they're located on a map.

Try Map IPs
Summarize IPs

Summarize IPs

Use our data visualization tool to create a visual overview of multiple IPs.

Try Summarize IPs