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 869
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 5 months ago on Apr 28, 2025

IP Ranges

Netblock Company Num of IPs
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
62.134.0.0/16 British Telecommunications PLC 65,536
62.180.0.0/16 British Telecommunications PLC 65,536
166.49.128.0/17 communications networking services Private Unlimited Company 32,768
62.102.0.0/17 British Telecommunications PLC 32,768
62.5.0.0/17 British Telecommunications PLC 32,768
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
62.173.192.0/18 British Telecommunications PLC 16,384
194.213.64.0/19 British Telecommunications PLC 8,192
195.182.96.0/19 British Telecommunications PLC 8,192
195.90.64.0/19 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
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
212.8.160.0/19 British Telecommunications PLC 8,192
213.137.160.0/19 British Telecommunications PLC 8,192
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
195.99.64.0/20 British Telecommunications PLC 4,096
206.73.80.0/20 INFONET BRANCH OFFICE 4,096
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
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
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
185.94.0.0/22 British Telecommunications PLC 1,024
195.171.36.0/22 British Telecommunications PLC 1,024
193.58.130.0/23 TESSENDERLO CHEMIE INTERNATIONAL NV 512
203.158.76.0/23 BT Global Communication India 512
31.95.218.0/23 BT Global Fabric Customers 512
46.248.10.0/23 TNT Express ICS Limited 512
46.248.8.0/23 TNT Express ICS Limited 512
132.244.240.0/24 Rolls-Royce plc 256
136.238.224.0/24 Schindler Informatik AG 256
136.238.84.0/24 Schindler Informatik AG 256
136.238.85.0/24 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
194.107.114.0/24 CEVA France SASU 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
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
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
8.12.61.0/24 Millward Brown, Inc. 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
2a00:2200:5300::/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

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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 869 domain names hosted across 195 IP addresses on this ASN.

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IP Address Domain Domains on this IP
80.255.163.72 ██████████ 95
212.108.4.142 ██████████ 87
62.134.42.244 ██████████ 77
62.180.131.137 ██████████ 71
62.180.131.138 ██████████ 64
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 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 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
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
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
AS202893 Lighting INTERNET
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
AS2603 NORDUnet
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
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.
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
AS35923 Johnson & Johnson Consumer Inc.
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
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ASN API ASN Database Download

Upstreams

There are 14 upstreams for this ASN.

upstreams Name
AS12956 TELXIUS Cable
AS1299 Arelion Sweden AB
AS174 Cogent Communications
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 ASN Database Download

Downstreams

There are 68 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
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
AS202893 Lighting INTERNET
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
AS35923 Johnson & Johnson Consumer Inc.
AS38191 Infosys Technologies Ltd
AS394805 ReliaQuest, LLC
AS40126 Molson Coors Beverage Company
AS40999 dus.net GmbH
AS41321 Fsas Technologies GmbH
AS41596 Willis Group Services Ltd
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 ASN Database Download

Pingable IPs

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

IP Address ASN Details
212.8.189.85 AS5400 British Telecommunications PLC 4.15ms from Amsterdam, NL
212.41.142.163 AS5400 British Telecommunications PLC 2.27ms from Amsterdam, NL
212.41.135.114 AS5400 British Telecommunications PLC 1.64ms from Amsterdam, NL
212.41.147.153 AS5400 British Telecommunications PLC 0.79ms from Amsterdam, NL
195.90.84.146 AS5400 British Telecommunications PLC 1.59ms from Amsterdam, NL
195.182.102.36 AS5400 British Telecommunications PLC 4.32ms from Amsterdam, NL
62.134.5.177 AS5400 British Telecommunications PLC 4.28ms from Amsterdam, NL
166.49.169.113 AS5400 British Telecommunications PLC 0.63ms from Ashburn, US
166.49.150.34 AS5400 British Telecommunications PLC 1.38ms from Aubervilliers, FR
166.49.156.156 AS5400 British Telecommunications PLC 1.59ms from Dublin, IE
62.134.52.145 AS5400 British Telecommunications PLC 0.68ms from Frankfurt am Main, DE
62.134.200.55 AS5400 British Telecommunications PLC 0.53ms from Frankfurt am Main, DE
62.134.218.137 AS5400 British Telecommunications PLC 0.70ms from Frankfurt am Main, DE
62.134.74.185 AS5400 British Telecommunications PLC 0.72ms from Frankfurt am Main, DE
62.134.193.38 AS5400 British Telecommunications PLC 1.44ms from Frankfurt am Main, DE
195.100.195.6 AS5400 British Telecommunications PLC 0.87ms from Frankfurt am Main, DE
2a00:2000:80::82 AS5400 British Telecommunications PLC 7.18ms from Frankfurt am Main, DE
62.134.38.210 AS5400 British Telecommunications PLC 1.54ms from Frankfurt am Main, DE
166.49.250.55 AS5400 British Telecommunications PLC 0.48ms from London, GB
31.95.0.49 AS5400 British Telecommunications PLC 0.64ms from London, GB
2a00:2000:2066::83 AS5400 British Telecommunications PLC 0.67ms from London, GB
212.31.205.250 AS5400 British Telecommunications PLC 11.11ms from Madrid, ES
212.21.193.94 AS5400 British Telecommunications PLC 1.43ms from Milan, IT
213.194.47.249 AS5400 British Telecommunications PLC 14.17ms from Milan, IT
8.12.61.31 AS5400 British Telecommunications PLC 2.13ms from Amsterdam, NL

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
97.201.205.232 AS6167 Verizon Business 10.47ms from Atlanta, US
76.97.39.8 AS7922 Comcast Cable Communications, LLC 6.38ms from Atlanta, US
83.45.224.8 AS3352 TELEFONICA DE ESPANA S.A.U. 1.22ms from Barcelona, ES
82.157.213.8 AS45090 Shenzhen Tencent Computer Systems Company Limited 1.71ms from Beijing, CN
81.196.22.216 AS8708 DIGI ROMANIA S.A. 2.85ms from Bucharest, RO
3.121.210.136 AS16509 Amazon.com, Inc. 0.12ms from Frankfurt am Main, DE
103.105.81.136 AS17451 BIZNET NETWORKS 9.14ms from Jakarta, ID
37.52.80.56 AS6849 JSC "Ukrtelecom" 8.99ms from Kyiv, UA
90.211.108.216 AS5607 Sky UK Limited 10.46ms from London, GB
79.79.187.120 AS9105 TalkTalk Communications Limited 3.66ms from London, GB
119.230.91.120 AS17511 OPTAGE Inc. 1.67ms from Osaka, JP
177.155.117.136 AS263616 Dez Solucoes em Telecomunicacoes LTDA 13.84ms from Osasco, BR
3.81.177.24 AS14618 Amazon.com, Inc. 0.21ms from Reston, US
98.51.23.8 AS7922 Comcast Cable Communications, LLC 6.22ms from Santa Clara, US
14.35.80.136 AS4766 Korea Telecom 1.57ms from Seoul, KR
5.55.175.40 AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA 5.48ms from Sofia, BG
60.158.108.104 AS17676 SoftBank Corp. 3.18ms from Tokyo, JP
187.23.112.8 AS28573 Claro NXT Telecomunicacoes Ltda 1.73ms from Chapeco, BR
181.1.170.248 AS7303 Telecom Argentina S.A. 9.27ms from Cordoba, AR
84.119.119.8 AS3209 Vodafone GmbH 12.10ms from Frankfurt am Main, DE
47.114.59.40 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 5.70ms from Hangzhou, CN
90.0.179.136 AS3215 Orange S.A. 4.95ms from Paris, FR
131.153.12.24 AS20454 SECURED SERVERS LLC 0.38ms from Phoenix, US
50.19.232.24 AS14618 Amazon.com, Inc. 0.21ms from Reston, US
32.210.163.200 AS46690 Southern New England Telephone Company and SNET America, Inc. 8.52ms from Secaucus, US

Traceroute

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

$
traceroute -a -n -q1 -m8 206.73.215.67
traceroute to 206.73.215.67 (206.73.215.67): 8 hops max, 52 byte packets
1 [AS56630] 77.72.16.177 1805.517 ms
2 [AS3257] 154.14.160.13 3.044 ms
4 [AS3257] 77.67.122.178 1.167 ms
5 [AS5400] 166.49.164.155 11.378 ms
6 *
7 *
8 *
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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