All IP Ranges
81.0.0.0/8
AS2856 | 81.128.0.0/11

81.128.0.0/11

AS2856 · British Telecommunications PLC

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Summary

Country	United Kingdom
Domain	bt.com
ASN	AS2856
Registry	ripe
Hosted IPs	2,097,152
ID	UK-BT-20020725

WHOIS Details

inetnum:        81.128.0.0 - 81.159.255.255
org:            ORG-BPIS1-RIPE
netname:        UK-BT-20020725
country:        GB
admin-c:        FLS15-RIPE
tech-c:         FLS15-RIPE
status:         ALLOCATED PA
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         BTNET-INFRA-MNT
mnt-routes:     BTNET-INFRA-MNT
created:        2002-09-10T14:35:54Z
last-modified:  2024-03-11T16:17:01Z
source:         RIPE
abuse-email:    abuse@bt.com
abuse-c:        AR13878-RIPE
abuse-org:      ORG-BPIS1-RIPE

organisation:   ORG-BPIS1-RIPE
org-name:       British Telecommunications PLC
country:        GB
org-type:       LIR
address:        PP1, Floor1, Orion, Adastral Park, Martlesham Heath
address:        IP5 3RE
address:        Ipswich
address:        UNITED KINGDOM
phone:          +44 (0)20 7356 5000
abuse-c:        AR13878-RIPE
mnt-ref:        BTNET-MNT
mnt-ref:        BTNET-INFRA-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         BTNET-INFRA-MNT
admin-c:        FLS15-RIPE
admin-c:        MS35380-RIPE
admin-c:        GF1231-RIPE
created:        2004-04-17T12:11:50Z
last-modified:  2025-03-24T17:20:04Z
source:         RIPE
e-mail:         ipaddman@bt.com
abuse-email:    abuse@bt.com
abuse-c:        AR13878-RIPE
abuse-org:      undefined

role:           BT IP Address Admin
address:        PP 1, Floor 1
address:        Orion Building
address:        Adastral Park
address:        Martlesham Heath
address:        Ipswich
address:        IP5 3RE
address:        UK
e-mail:         ipaddman@bt.com
e-mail:         abuse@bt.com
remarks:        
remarks:        
nic-hdl:        FLS15-RIPE
mnt-by:         BTNET-INFRA-MNT
created:        2002-08-29T06:26:48Z
last-modified:  2023-06-21T11:23:36Z
source:         RIPE

route:          81.128.0.0/11
descr:          BT Public Internet Service
origin:         AS2856
mnt-by:         BTNET-INFRA-MNT
notify:         ip.address.admin@bt.com
created:        2002-10-22T13:45:17Z
last-modified:  2014-07-31T07:51:30Z
source:         RIPE

Nearby Ranges

BGP prefixes that overlap with 81.0.0.0/8

Range	ASN	Company	Num of IPs
81.128.0.0/12	AS2856	BT Infrastructure Layer	1,048,576
81.96.0.0/12	AS5089	Virgin Media Limited	1,048,576
81.224.0.0/12	AS3301	Telia Network Services	1,048,576
81.112.0.0/13	AS20959	Telecom Italia S.p.A.	524,288
81.244.0.0/14	AS5432	Proximus NV	262,144
81.96.0.0/14	AS5089	Virgin Media Limited	262,144
81.104.0.0/14	AS5089	Virgin Media Limited	262,144
81.120.0.0/14	AS20959	Telecom Italia S.p.A.	262,144
81.212.0.0/14	AS9121	Turk Telekomunikasyon Anonim Sirketi	262,144
81.68.0.0/14	AS45090	Tencent Cloud Computing (Beijing) Co., Ltd	262,144
81.108.0.0/14	AS5089	Virgin Media Limited	262,144
81.204.0.0/14	AS1136	KPN B.V.	262,144
81.100.0.0/14	AS5089	Virgin Media Limited	262,144
81.64.0.0/14	AS15557	Societe Francaise Du Radiotelephone - SFR SA	262,144
81.240.0.0/14	AS5432	Proximus NV	262,144
81.102.0.0/15	AS5089	Virgin Media Limited	131,072
81.110.0.0/15	AS5089	Virgin Media Limited	131,072
81.106.0.0/15	AS5089	Virgin Media Limited	131,072
81.60.0.0/15	AS12430	VODAFONE ONO, S.A.	131,072
81.82.0.0/15	AS6848	Telenet BV	131,072
81.178.0.0/15	AS9105	TalkTalk Communications Limited	131,072
81.62.0.0/15	AS3303	Swisscom (Schweiz) AG	131,072
81.98.0.0/15	AS5089	Virgin Media Limited	131,072
81.182.0.0/15	AS5483	Magyar Telekom Plc.	131,072
81.56.0.0/15	AS29447	Free SAS	131,072
81.100.0.0/15	AS5089	Virgin Media Limited	131,072
81.108.0.0/15	AS5089	Virgin Media Limited	131,072
81.96.0.0/15	AS5089	Virgin Media Limited	131,072
81.164.0.0/15	AS6848	Telenet BV	131,072
81.166.0.0/15	AS29695	Lyse Tele AS	131,072
81.104.0.0/15	AS5089	Virgin Media Limited	131,072
81.36.0.0/16	AS3352	Telefonica de Espana SAU	65,536
81.178.0.0/16	AS9105	Customer Dynamic IPs	65,536
81.42.0.0/16	AS3352	Red de servicios IP	65,536
81.198.0.0/16	AS12578	SIA Tet	65,536
81.63.0.0/16	AS3303	Swisscom (Schweiz) AG	65,536
81.191.0.0/16	AS2116	GLOBALCONNECT AS	65,536
81.116.0.0/16	AS20959	Telecom Italia S.p.A.	65,536
81.193.0.0/16	AS3243	MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.	65,536
81.47.0.0/16	AS3352	Red de servicios IP	65,536
81.37.0.0/16	AS3352	Telefonica de Espana SAU	65,536
81.223.0.0/16	AS8412	T-Mobile Austria GmbH	65,536
81.118.0.0/16	AS20959	Telecom Italia S.p.A.	65,536
81.44.0.0/16	AS3352	Telefonica de Espana SAU	65,536
81.86.0.0/16	AS9105	TalkTalk Communications Limited	65,536
81.184.0.0/16	AS6739	VODAFONE ONO, S.A.	65,536
81.220.0.0/16	AS15557	Societe Francaise Du Radiotelephone - SFR SA	65,536
81.41.0.0/16	AS3352	Red de Servicios IP	65,536
81.254.0.0/16	AS3215	Orange S.A.	65,536

Show more ranges

Hosted domains

There are 8,329 domain names hosted across 3,073 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
81.145.31.210	gdreading.co.uk	881
81.145.16.13	centralqualifications.org.uk	260
81.145.31.217	gdfetchingham.co.uk	251
81.145.31.222	londontvreceptionservice.co.uk	159
81.134.40.54	euphoria-hair.co.uk	101
81.144.251.155	campingandcaravanningclub.co.uk	99
81.144.162.21	certasenergy.at	78
81.142.113.85	stairliftswarwickshire.co.uk	75
81.145.16.53	debenvalleyvets.co.uk	67
81.150.192.98	englishtutor.uk	63
81.144.218.84	aircareliverpool.co.uk	60
81.145.58.165	screenscheduling.com	42
81.144.179.205	lavenhamproperty.co.uk	41
81.145.167.201	go-tcha-evolve.co.uk	36
81.144.224.25	hinkleytoolhire.co.uk	35
81.150.7.16	jcashford.com	29
81.150.25.196	clearinternetsolutions.co.uk	29
81.142.113.81	siriuscollaboration.com	27
81.128.250.13	munsontransport.co.uk	27
81.128.216.75	mondaysupport.com	25

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