Autonomous System details

AS3300

British Telecommunications PLC · bt.com

United Kingdom

Cloud

Mobile

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AS3300 – British Telecommunications PLC

Field	Value
Country	United Kingdom
Website	bt.com
Hosted domains	52
IPv4 addresses	513,280
IPv6 addresses	236,446,547,503,507,632,505,732,726,784
ASN type	ISP
Registry	ripe
Allocated	23 years ago on Sep 19, 2002
Updated	3 months ago on Oct 16, 2025

Netblock	Company	Num of IPs
205.248.0.0/16	INFONET Services Corporation	65,536
206.182.0.0/16	INFONET Services Corporation	65,536
207.117.0.0/16	INFONET Services Corporation	65,536
207.209.0.0/16	INFONET Services Corporation	65,536
209.28.0.0/16	INFONET Services Corporation	65,536
204.231.0.0/17	INFONET Services Corporation	32,768
61.14.0.0/18	Infonet Services Corporation	16,384
63.250.128.0/18	INFONET Services Corporation	16,384
192.237.64.0/18	INFONET Services Corporation	16,384
198.207.64.0/18	INFONET Services Corporation	16,384
199.6.64.0/18	INFONET Services Corporation	16,384
204.140.64.0/18	INFONET Services Corporation	16,384
204.231.128.0/18	INFONET Services Corporation	16,384
206.182.128.0/18	INFONET Services Corporation	16,384
206.182.192.0/18	INFONET Services Corporation	16,384
192.92.32.0/19	INFONET Services Corporation	8,192
203.187.128.0/19	BT-Infonet, Internet Service Provider	8,192
207.209.0.0/19	INFONET Services Corporation	8,192
207.209.64.0/19	INFONET Services Corporation	8,192
72.29.128.0/20	INFONET Services Corporation	4,096
192.157.144.0/20	INTERLEAF	4,096
192.92.24.0/21	Infonet Services Corporation / INFONET Technology Services	2,048
192.157.136.0/21	TEXAS INSTRUMENTS	2,048
61.14.4.0/22	BT GIA	1,024
61.14.8.0/22	BT GIA	1,024
61.14.12.0/22	BT GIA	1,024
61.14.20.0/22	Infonet Services Corporation	1,024
61.14.24.0/22	BT HK	1,024
61.14.28.0/22	BT GIA	1,024
61.14.32.0/22	BT GIA	1,024
61.14.36.0/22	BT-GIA-JP-net	1,024
61.14.40.0/22	BT ZA	1,024
61.14.44.0/22	BT-ZA	1,024
61.14.48.0/22	BT ZA	1,024
63.250.128.0/22	INFONET Services Corporation	1,024
63.250.132.0/22	INFONET Services Corporation	1,024
63.250.136.0/22	mainsoft	1,024
63.250.140.0/22	INFONET Services Corporation	1,024
63.250.144.0/22	INFONET Services Corporation	1,024
63.250.148.0/22	INFONET Services Corporation	1,024
63.250.152.0/22	INFONET Services Corporation	1,024
63.250.156.0/22	LG CNS CO. LTD	1,024
63.250.160.0/22	INFONET Services Corporation	1,024
63.250.168.0/22	INFONET Services Corporation	1,024
63.250.176.0/22	British Telecom	1,024
63.250.180.0/22	British Telecom	1,024
63.250.184.0/22	h muehlstein and co inc	1,024
72.29.132.0/22	INFONET Services Corporation	1,024
192.92.20.0/22	INFONET Services Corporation	1,024
192.157.132.0/22	POSTIPAN	1,024
198.207.64.0/22	COTY	1,024
198.207.72.0/22	ESKO-GRAPHICS BVBA	1,024
198.207.76.0/22	ESKO-GRAPHICS BVBA	1,024
203.187.128.0/22	BT-GIA	1,024
61.14.2.0/23	BT GIA	512
192.92.80.0/23	INFONET Services Corporation	512
192.157.130.0/23	INFONET Services Corporation	512
192.157.160.0/23	INFONET Services Corporation	512
61.14.1.0/24	BT GIA	256
61.14.7.0/24	SIMMONS & SIMMONS	256
61.14.11.0/24	BT GIA	256
61.14.15.0/24	BT GIA	256
61.14.31.0/24	BT GIA	256
61.14.34.0/24	BT GIA	256
61.14.36.0/24	BT-GIA-JP-net	256
61.14.39.0/24	BT-GIA-JP-net	256
61.14.52.0/24	Bt GIA	256
63.250.131.0/24	SCHINDLER HOLDING	256
63.250.132.0/24	DIGITPA	256
63.250.135.0/24	INFONET Services Corporation	256
63.250.144.0/24	STELLANTIS	256
63.250.147.0/24	INFONET Services Corporation	256
63.250.155.0/24	TRIVIUM PACKAGING BV	256
63.250.159.0/24	COTY	256
63.250.163.0/24	SPECSAVERS OPTICAL GROUP LIMITED	256
63.250.164.0/24	INFONET Services Corporation	256
63.250.171.0/24	ATRADIUS	256
63.250.172.0/24	INFONET Services Corporation	256
63.250.173.0/24	INFONET Services Corporation	256
63.250.174.0/24	Philips	256
63.250.187.0/24	MOTHERSON SUMI INFOTECH AND DESIGN LIMITED	256
63.250.189.0/24	Esaress Intl Group Inc	256
63.250.191.0/24	DP DHL ETO	256
136.238.168.0/24	Schindler Informatik AG	256
136.238.185.0/24	Schindler Informatik AG	256
136.238.187.0/24	Schindler Informatik AG	256
136.238.229.0/24	Schindler Informatik AG	256
136.238.232.0/24	Schindler Informatik AG	256
136.238.238.0/24	Schindler Informatik AG	256
136.238.239.0/24	Schindler Informatik AG	256
136.238.240.0/24	Schindler Informatik AG	256
136.238.241.0/24	Schindler Informatik AG	256
136.238.243.0/24	Schindler Informatik AG	256
185.249.5.0/24	Lumileds Holding B.V.	256
185.249.6.0/24	Lumileds Holding B.V.	256
192.92.18.0/24	BT CUSTOMER	256
192.92.19.0/24	BT CUSTOMER	256
192.92.82.0/24	INFONET Services Corporation	256
194.33.52.0/24	KANTAR DORMANT 3 LIMITED	256
195.206.69.0/24	British Telecommunications PLC	256
195.206.70.0/24	British Telecommunications PLC	256
198.137.75.0/24	INFONET Services Corporation	256
198.178.237.0/24	KANTAR	256
198.178.239.0/24	KANTAR	256
198.207.67.0/24	ORNUA CO-OP	256
203.187.145.0/24	BT GIA SNG	256
203.187.146.0/24	BT GIA SNG	256
204.52.187.0/24	KANTAR	256
204.79.84.0/24	INFONET Services Corporation	256
206.182.134.0/24	LEGIONS OF CHRIST	256
206.182.164.0/24	INFONET SOFTWARE SOLUTIONS	256
209.28.174.0/24	Internal-FW	256

Netblock	Company
2402:fb00::/32	Infonet Services Corporation
2606:f100::/32	BT Management Services
2402:fb00::/36	Infonet Services Corporation
2402:fb00:1000::/36	Infonet Services Corporation
2402:fb00:2000::/36	Infonet Services Corporation
2402:fb00:3000::/36	Infonet Services Corporation
2606:f100::/36	BT Management Services
2606:f100:1000::/36	BT Management Services
2606:f100:2000::/36	BT Management Services
2606:f100:3000::/36	BT Management Services
2606:f100:4000::/36	BT Management Services
2606:f100:5000::/36	BT Management Services
2606:f100:6000::/36	BT Management Services
2606:f100:7000::/36	BT Management Services
2606:f100:8000::/36	BT Management Services
2606:f100:9000::/36	BT Management Services
2606:f100:c000::/36	BT Management Services
2402:fb00:f00::/40	Infonet Services Corporation
2402:fb00:1f00::/40	Lumileds
2402:fb00:2f00::/40	Infonet Services Corporation
2402:fb00:3f00::/40	Infonet Services Corporation
2606:f100:f00::/40	BT Management Services
2606:f100:1f00::/40	BT Management Services
2606:f100:2f00::/40	BT Management Services
2606:f100:3f00::/40	BT Management Services
2606:f100:4f00::/40	BT Management Services
2606:f100:5f00::/40	BT Management Services
2606:f100:7f00::/40	BT Management Services
2606:f100:8f00::/40	BT Management Services

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IP Ranges API

WHOIS Details

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                                                ASHandle:       AS3300
                                                OrgID:          AS3300
                                                ASName:         AS3300
                                                ASNumber:       AS3300
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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IP WHOIS API & Database

Hosted Domains

There are 52 domain names hosted across 31 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
207.209.182.183	██████████	14
198.178.239.130	██████████	4
192.237.77.36	██████████	3
204.52.187.84	██████████	2
204.52.187.154	██████████	2
203.187.142.169	██████████	2
198.178.239.131	██████████	1
204.52.187.50	████████	1
203.187.142.182	██████████	1
61.14.49.46	██████████	1

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Hosted Domains API & Database

Peers

There are 126 peers for this ASN.

Peers	Name
AS1031	PEER 1031 LLC
AS11271	SENCINET LATAM BRASIL LTDA
AS11845	Vox Telecom Ltd
AS12200	Rackspace Hosting
AS1299	Arelion Sweden AB
AS132337	Axclusive
AS133782	Elsevier Ltd
AS136767	BMW AG (Bayerische Motoren Werke Aktiengesellschaft)
AS1403	EBOX
AS140627	OneQode
AS141399	Specsavers Pty Ltd
AS14537	Continent 8 LLC
AS14840	BR.Digital Telecom
AS14907	Wikimedia Foundation Inc.
AS151326	DCConnect Communication Pte. Ltd.
AS16552	Tiggee LLC
AS16735	ALGAR TELECOM S/A
AS18106	Viewqwest Pte Ltd
AS1828	Unitas Global
AS19151	BroadbandONE, LLC
AS1916	Rede Nacional de Ensino e Pesquisa
AS19812	BT Americas, Inc
AS198150	SIACOM JSC
AS199524	G-Core Labs S.A.
AS212565	Specsavers Optical Group Limited
AS22381	Megatelecom Telecomunicacoes Ltda
AS22548	Núcleo de Inf. e Coord. do Ponto BR - NIC.BR
AS22652	Videotron Ltee
AS22683	PHILIPS INTERNET
AS23764	CTGNet
AS24482	SG.GS
AS2497	Internet Initiative Japan Inc.
AS2518	BIGLOBE Inc.
AS262427	Invista Net Provedor de Acesso Ltda
AS262462	Aranet Play
AS263009	FORTE TELECOM LTDA.
AS263152	MIGO TELECOM
AS263237	PowerHost Telecom SPA
AS263541	IMF NETWORK DATA LTDA - ME
AS26380	MasterCard Technologies LLC
AS264409	GRUPO YAX
AS264479	Turbozone Internet
AS26478	Novartis Pharmaceuticals
AS267613	ELETRONET S.A.
AS268976	Weclix Telecom S/A
AS269180	VIPNET Conexão
AS27000	Coty Inc.
AS271253	LINK BRASIL TELECOMUNICACOES LTDA
AS28624	PROVEDORA CMA INTERNET LTDA
AS28634	Life Tecnologia Ltda.
AS29049	Delta Telecom Ltd
AS2914	NTT America, Inc.
AS30844	Liquid Telecommunications Ltd
AS31713	Gateway Communications
AS32590	Valve Corporation
AS328320	Kurlec Wireless (PTY) Ltd
AS3303	Swisscom (Switzerland) Ltd
AS33891	Core-Backbone GmbH
AS3491	PCCW Global, Inc.
AS35280	F5 Networks SARL
AS36236	NetActuate, Inc
AS37100	SEACOM Limited
AS3741	Dimension Data
AS37468	Angola Cables
AS37697	WEBMASTERS, LDA.
AS38008	Aperture Science Limited
AS38195	Superloop
AS39120	Convergenze S.p.A.
AS393493	Lotte Biologics USA, LLC
AS399449	Kyndryl
AS40126	Molson Coors Beverage Company
AS40659	BMW of North America, LLC (Group Data Centers America)
AS40934	Fortinet Inc.
AS4230	CLARO S.A.
AS42473	Anexia Cloud Solutions GmbH
AS45187	Rackspace IT Hosting AS IT Hosting Provider Hong Kong
AS45352	IP ServerOne Solutions Sdn Bhd
AS45489	Sri Lanka Telecom PLC, GLobal Peering
AS45796	UIH / BB Connect
AS4635	Hong Kong Internet Exchange--Route Server 1
AS4637	Telstra Global
AS4657	StarHub Ltd
AS4766	Korea Telecom
AS4826	Vocus Connect International Backbone
AS48647	Solvay SA
AS49544	i3D.net B.V
AS51185	MainStreaming SpA
AS52320	GlobeNet Cabos Submarinos Colombia, S.A.S.
AS52468	UFINET PANAMA S.A.
AS52863	UPX TECNOLOGIA LTDA
AS52873	Softdados Telecomunicações
AS53062	ALT \| GRUPO BRASIL TECPAR
AS53202	Acesso10 Telecom
AS55290	Depository Trust & Clearing Corporation
AS55720	Gigabit Hosting Sdn Bhd
AS56665	Proximus Luxembourg S.A.
AS57304	JSC "RetnNet"
AS57463	NetIX Communications JSC
AS58057	Securebit AG
AS58453	China Mobile International Limited

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ASN API & Database

Upstreams

There are 11 upstreams for this ASN.

upstreams	Name
AS11271	SENCINET LATAM BRASIL LTDA
AS1299	Arelion Sweden AB
AS2914	NTT America, Inc.
AS30844	Liquid Telecommunications Ltd
AS3491	PCCW Global, Inc.
AS4637	Telstra Global
AS4657	StarHub Ltd
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 20 downstreams for this ASN.

Downstreams	Name
AS133782	Elsevier Ltd
AS136767	BMW AG (Bayerische Motoren Werke Aktiengesellschaft)
AS141399	Specsavers Pty Ltd
AS19812	BT Americas, Inc
AS212565	Specsavers Optical Group Limited
AS22683	PHILIPS INTERNET
AS26380	MasterCard Technologies LLC
AS26478	Novartis Pharmaceuticals
AS27000	Coty Inc.
AS393493	Lotte Biologics USA, LLC
AS399449	Kyndryl
AS40126	Molson Coors Beverage Company
AS40659	BMW of North America, LLC (Group Data Centers America)
AS45187	Rackspace IT Hosting AS IT Hosting Provider Hong Kong
AS48647	Solvay SA
AS55290	Depository Trust & Clearing Corporation
AS6220	inContact Inc.
AS72	Schlumberger Limited
AS7246	Bristol-Myers Squibb Company
AS78	BT Americas, Inc

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ASN API & Database

Pingable IPs

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

IP Address	ASN	Details
63.250.136.53	AS3300 British Telecommunications PLC	`0.69ms` from Atlanta, US
2606:f100:60ff:fffe::1f	AS3300 British Telecommunications PLC	`0.32ms` from Johannesburg, ZA
63.250.176.63	AS3300 British Telecommunications PLC	`0.63ms` from Los Angeles, US
61.14.35.153	AS3300 British Telecommunications PLC	`1.40ms` from Singapore, SG
195.206.69.51	AS3300 British Telecommunications PLC	`0.38ms` from Johannesburg, ZA
63.250.184.136	AS3300 British Telecommunications PLC	`0.19ms` from Miami, US
63.250.172.185	AS3300 British Telecommunications PLC	`0.62ms` from New York City, US
61.14.20.230	AS3300 British Telecommunications PLC	`0.39ms` from Sydney, AU
61.14.11.45	AS3300 British Telecommunications PLC	`0.53ms` from Tokyo, JP
204.52.187.253	AS3300 British Telecommunications PLC	`0.64ms` from Ashburn, US
2402:fb00:ff:ffff::1	AS3300 British Telecommunications PLC	`0.72ms` from Hong Kong, HK
61.14.5.169	AS3300 British Telecommunications PLC	`0.52ms` from Hong Kong, HK
61.14.44.66	AS3300 British Telecommunications PLC	`1.23ms` from Johannesburg, ZA
2606:f100:20ff:fffe::1f	AS3300 British Telecommunications PLC	`0.58ms` from New York City, US
61.14.12.153	AS3300 British Telecommunications PLC	`0.33ms` from Sydney, AU
61.14.36.5	AS3300 British Telecommunications PLC	`0.67ms` from Tokyo, JP
2402:fb00:ff15:1::2	AS3300 British Telecommunications PLC	`1.38ms` from Tokyo, JP
2606:f100:70ff:fffe::2	AS3300 British Telecommunications PLC	`0.46ms` from Toronto, CA
2606:f100:50ff:ffff::1	AS3300 British Telecommunications PLC	`0.71ms` from Chicago, US
63.250.130.201	AS3300 British Telecommunications PLC	`0.53ms` from Chicago, US
61.14.43.2	AS3300 British Telecommunications PLC	`5.77ms` from Johannesburg, ZA
203.187.128.125	AS3300 British Telecommunications PLC	`0.66ms` from Singapore, SG
61.14.13.245	AS3300 British Telecommunications PLC	`0.38ms` from Sydney, AU
61.14.21.57	AS3300 British Telecommunications PLC	`0.94ms` from Sydney, AU
63.250.163.5	AS3300 British Telecommunications PLC	`1.59ms` from Toronto, CA

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
213.60.211.116	AS12334 R Cable y Telecable Telecomunicaciones, S.A.U.	`8.31ms` from A Coruna, ES
131.202.38.4	AS611 NB-PEI Educational Computer Network	`13.88ms` from Beauharnois, CA
2.204.232.132	AS3209 Vodafone GmbH	`3.94ms` from Berlin, DE
156.56.29.164	AS87 Indiana University	`5.28ms` from Chicago, US
172.168.47.68	AS8075 Microsoft Corporation	`0.17ms` from Des Moines, US
90.193.255.132	AS5607 Sky UK Limited	`3.26ms` from Erith, GB
116.129.8.52	AS4837 CHINA UNICOM China169 Backbone	`12.29ms` from Kunming, CN
86.166.92.196	AS2856 British Telecommunications PLC	`5.56ms` from London, GB
82.3.253.212	AS5089 Virgin Media Limited	`6.50ms` from London, GB
6.3.52.84	AS668 United States Department of Defense (DoD)	`1.76ms` from Los Angeles, US
104.85.8.228	AS16625 Akamai Technologies, Inc.	`0.15ms` from Milan, IT
95.79.197.4	AS42682 JSC "ER-Telecom Holding"	`6.18ms` from Moscow, RU
20.252.15.68	AS8075 Microsoft Corporation	`0.30ms` from Quincy, US
186.36.85.68	AS6535 Telmex Servicios Empresariales S.A.	`0.31ms` from Santiago, CL
43.131.225.196	AS132203 Tencent Building, Kejizhongyi Avenue	`0.71ms` from Seoul, KR
221.160.89.20	AS4766 Korea Telecom	`4.04ms` from Seoul, KR
211.115.172.52	AS4766 Korea Telecom	`10.73ms` from Seoul, KR
203.88.44.20	AS17962 ShenZhen Topway Video Communication Co. Ltd	`4.31ms` from Shenzhen, CN
2.67.70.36	AS44034 Hi3G Access AB	`14.74ms` from Stockholm, SE
126.47.210.132	AS17676 SoftBank Corp.	`9.07ms` from Tokyo, JP
196.186.153.100	AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom)	`16.54ms` from Tunis, TN
83.7.217.68	AS5617 Orange Polska Spolka Akcyjna	`8.79ms` from Wrocław, PL
3.236.59.52	AS14618 Amazon.com, Inc.	`0.75ms` from Ashburn, US
173.209.187.36	AS18624 Greenlight	`7.29ms` from Durham, US
27.148.231.4	AS4134 CHINANET-BACKBONE	`5.88ms` from Fuzhou, CN

Traceroute

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

traceroute -a -n -q1 -f2 -m6 209.28.249.85

traceroute to 209.28.249.85 (209.28.249.85): 6 hops max, 52 byte packets

2 [AS37381] 197.159.223.17 60.464 ms

3 [AS60171] 185.35.143.156 60.649 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Abidjan, CI

On December 28th 2025

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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 AS3300 at robtex.

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