All ASNs

Autonomous System details for AS3300

AS3300

British Telecommunications Limited • bt.com

AS3300 — British Telecommunications Limited

AS Name

Country

United Kingdom (GB)

Website

bt.com

Number of IPv4

604,160

Number of IPv6

2.36 × 10²⁹

ASN type

ISP

Status

Allocated

Registry

RIPE

Allocated

September 19, 2002

Last updated

May 05, 2026

IP Ranges

122 IPv4 prefixes, 29 IPv6 prefixes

Prefix	Company	Number of IPs
61.14.0.0/18	Infonet Services Corporation	16,384
61.14.1.0/24	BT GIA	256
61.14.2.0/23	Infonet Services Corporation	512
61.14.4.0/22	BT GIA	1,024
61.14.7.0/24	SIMMONS & SIMMONS	256
61.14.8.0/22	BT GIA	1,024
61.14.11.0/24	BT GIA	256
61.14.12.0/22	BT GIA	1,024
61.14.15.0/24	BT GIA	256
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
61.14.31.0/24	BT GIA	256
61.14.32.0/22	BW Maritime Pte Ltd	1,024
61.14.34.0/24	BT GIA	256
61.14.36.0/22	BT-GIA-JP-net	1,024
61.14.36.0/24	BT-GIA-JP-net	256
61.14.39.0/24	BT-GIA-JP-net	256
61.14.40.0/22	BT ZA	1,024
61.14.44.0/22	BT-ZA	1,024
61.14.48.0/22	Independent Newspapers Limited	1,024
61.14.52.0/24	Bt GIA	256
63.250.128.0/18	INFONET Services Corporation	16,384
63.250.128.0/22	INFONET Services Corporation	1,024
63.250.131.0/24	INFONET Services Corporation	256
63.250.132.0/22	INFONET Services Corporation	1,024
63.250.132.0/24	INFONET Services Corporation	256
63.250.135.0/24	INFONET Services Corporation	256
63.250.136.0/23	INFONET Services Corporation	512
63.250.138.0/24	INFONET Services Corporation	256
63.250.139.0/24	INFONET Services Corporation	256
63.250.140.0/22	INFONET Services Corporation	1,024
63.250.144.0/22	INFONET Services Corporation	1,024
63.250.144.0/24	INFONET Services Corporation	256
63.250.147.0/24	INFONET Services Corporation	256
63.250.148.0/22	INFONET Services Corporation	1,024
63.250.152.0/22	INFONET Services Corporation	1,024
63.250.155.0/24	INFONET Services Corporation	256
63.250.156.0/22	INFONET Services Corporation	1,024
63.250.159.0/24	INFONET Services Corporation	256
63.250.160.0/22	INFONET Services Corporation	1,024
63.250.163.0/24	INFONET Services Corporation	256
63.250.164.0/24	INFONET Services Corporation	256
63.250.165.0/24	INFONET Services Corporation	256
63.250.168.0/22	INFONET Services Corporation	1,024
63.250.171.0/24	INFONET Services Corporation	256
63.250.172.0/24	INFONET Services Corporation	256
63.250.173.0/24	INFONET Services Corporation	256
63.250.174.0/24	INFONET Services Corporation	256
63.250.176.0/22	INFONET Services Corporation	1,024
63.250.180.0/22	INFONET Services Corporation	1,024
63.250.184.0/22	INFONET Services Corporation	1,024
63.250.187.0/24	INFONET Services Corporation	256
63.250.189.0/24	INFONET Services Corporation	256
63.250.191.0/24	INFONET Services Corporation	256
72.29.128.0/20	AudioCodes Ltd	4,096
72.29.132.0/22	INFONET Services Corporation	1,024
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
192.92.20.0/22	INFONET Services Corporation	1,024
192.92.24.0/21	INFONET Services Corporation	2,048
192.92.32.0/19	INFONET Services Corporation	8,192
192.92.80.0/23	INFONET Services Corporation	512
192.92.82.0/24	INFONET Services Corporation	256
192.157.130.0/23	INFONET Services Corporation	512
192.157.132.0/22	POSTIPAN	1,024
192.157.136.0/21	EMI	2,048
192.157.144.0/20	TEXAS INSTRUMENTS	4,096
192.157.160.0/23	INFONET Services Corporation	512
192.237.64.0/18	INFONET Services Corporation	16,384
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
198.207.64.0/18	INFONET Services Corporation	16,384
198.207.64.0/22	INFONET Services Corporation	1,024
198.207.67.0/24	INFONET Services Corporation	256
198.207.68.0/22	INFONET Services Corporation	1,024
198.207.72.0/22	INFONET Services Corporation	1,024
198.207.74.0/24	INFONET Services Corporation	256
198.207.75.0/24	INFONET Services Corporation	256
198.207.76.0/22	INFONET Services Corporation	1,024
198.207.78.0/24	INFONET Services Corporation	256
198.207.79.0/24	INFONET Services Corporation	256
198.207.80.0/22	INFONET Services Corporation	1,024
198.207.127.0/24	INFONET Services Corporation	256
2402:fb00::/32	Infonet Services Corporation	7.92 × 10²⁸
2402:fb00::/36	Infonet Services Corporation	4.95 × 10²⁷
2402:fb00:f00::/40	Infonet Services Corporation	3.09 × 10²⁶
2402:fb00:1000::/36	Infonet Services Corporation	4.95 × 10²⁷
2402:fb00:1f00::/40	Lumileds	3.09 × 10²⁶
2402:fb00:2000::/36	Infonet Services Corporation	4.95 × 10²⁷
2402:fb00:2f00::/40	Infonet Services Corporation	3.09 × 10²⁶
2402:fb00:3000::/36	Infonet Services Corporation	4.95 × 10²⁷
2402:fb00:3f00::/40	Infonet Services Corporation	3.09 × 10²⁶
2606:f100::/32	BT Management Services	7.92 × 10²⁸
2606:f100::/36	BT Management Services	4.95 × 10²⁷
2606:f100:f00::/40	BT Management Services	3.09 × 10²⁶
2606:f100:1000::/36	BT Management Services	4.95 × 10²⁷
2606:f100:1f00::/40	BT Management Services	3.09 × 10²⁶
2606:f100:2000::/36	BT Management Services	4.95 × 10²⁷
2606:f100:2f00::/40	BT Management Services	3.09 × 10²⁶
2606:f100:3000::/36	BT Management Services	4.95 × 10²⁷
2606:f100:3f00::/40	BT Management Services	3.09 × 10²⁶
2606:f100:4000::/36	BT Management Services	4.95 × 10²⁷
2606:f100:4f00::/40	BT Management Services	3.09 × 10²⁶
2606:f100:5000::/36	BT Management Services	4.95 × 10²⁷
2606:f100:5f00::/40	BT Management Services	3.09 × 10²⁶
2606:f100:6000::/36	BT Management Services	4.95 × 10²⁷
2606:f100:7000::/36	BT Management Services	4.95 × 10²⁷
2606:f100:7f00::/40	BT Management Services	3.09 × 10²⁶
2606:f100:8000::/36	BT Management Services	4.95 × 10²⁷
2606:f100:8f00::/40	BT Management Services	3.09 × 10²⁶
2606:f100:9000::/36	BT Management Services	4.95 × 10²⁷
2606:f100:c000::/36	BT Management Services	4.95 × 10²⁷

This table only shows the first 100 of the set of IPv4 and IPv6 prefixes. All data is available via our IP data API.

IP ranges are the different blocks of IP addresses advertised by an Autonomous System (AS). These ranges can be used by the same organization operating the AS, or by different organizations.

Peers of AS3300

66 peers

AS1000 AS1403 AS2518 AS917 AS999 AS1828 AS2497 AS3303 AS3741 AS4230 AS4775 AS4826 AS6830 AS6939 AS8220 AS9002 AS9304 AS11845 AS12200 AS14537 AS14907 AS17639 AS19151 AS22548 AS23673 AS24482 AS28624 AS28634 AS32590 AS33891 AS35280 AS37100 AS37468 AS39120 AS45352 AS51185 AS52320 AS52873 AS55720 AS58057 AS58511 AS63956 AS132337 AS151326 AS199524 AS263152 AS263237 AS264479 AS271253 AS328320 AS6057 AS6424 AS7713 AS8359 AS8966 AS18106 AS22652 AS23764 AS37697 AS37721 AS49544 AS60503 AS61568 AS140627 AS262427 AS266213

AS3300 peers with these other Autonomous Systems.

Peering is a direct, often free, traffic exchange between Autonomous Systems (ASNs). They share routes only to their own networks and customers, making connections faster and cheaper for that specific traffic, without providing full internet access to each other.

Upstreams of AS3300

9 upstreams

AS1299 AS2914 AS3491 AS4637 AS4657 AS6461 AS6762 AS30844 AS31713

AS3300 uses these Autonomous Systems as its upstreams.

An upstream (or transit provider) is another AS that AS3300 pays for full internet connectivity, allowing it to reach all global destinations and be reachable by them.

Downstreams of AS3300

20 downstreams

AS72 AS78 AS6220 AS7246 AS18872 AS22683 AS26380 AS26478 AS27000 AS40126 AS40659 AS45187 AS48647 AS55290 AS133782 AS136767 AS141399 AS212565 AS393493 AS399449

AS3300 provides internet connectivity to these downstream Autonomous Systems.

A downstream is a customer Autonomous System that pays another AS (its provider) for internet access. The provider AS carries the downstream's traffic and makes its network reachable.