1. All IP Ranges
  2. 81.0.0.0/8
  3. 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
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

Overlapping Ranges

BGP prefixes that are contained by 81.128.0.0/11

Range ASN Company Num of IPs
81.128.0.0/12 AS2856 BT Infrastructure Layer 1,048,576

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
81.204.0.0/14 AS1136 KPN B.V. 262,144
81.64.0.0/14 AS15557 Societe Francaise Du Radiotelephone - SFR SA 262,144
81.76.0.0/14 AS5378 Vodafone Limited 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
81.60.0.0/15 AS12430 VODAFONE ONO, S.A. 131,072
81.56.0.0/15 AS29447 Free SAS 131,072
81.166.0.0/15 AS29695 Lyse Tele AS 131,072
81.62.0.0/15 AS3303 Swisscom (Schweiz) AG 131,072
81.178.0.0/15 AS13285 TalkTalk Communications Limited 131,072
81.182.0.0/15 AS5483 Magyar Telekom Plc. 131,072
81.164.0.0/15 AS6848 Telenet BV 131,072
81.82.0.0/15 AS6848 Telenet BV 131,072
81.187.0.0/16 AS20712 Andrews & Arnold Ltd 65,536
81.196.0.0/16 AS8708 DIGI ROMANIA S.A. 65,536
81.193.0.0/16 AS3243 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A. 65,536
81.80.0.0/16 AS3215 Orange S.A. 65,536
81.190.0.0/16 AS21021 Multimedia Polska Sp. z o.o. 65,536
81.61.0.0/16 AS6739 ONO_HFC 65,536
81.218.0.0/16 AS8551 Bezeq International Ltd. 65,536
81.198.0.0/16 AS24921 SIA Tet 65,536
81.185.0.0/16 AS15557 Societe Francaise Du Radiotelephone - SFR SA 65,536
81.189.0.0/16 AS8437 Network of Hutchison Drei Austria GmbH 65,536
81.194.0.0/16 AS2200 Renater 65,536
81.184.0.0/16 AS6739 VODAFONE ONO, S.A. 65,536
81.184.0.0/16 AS6739 VODAFONE ONO, S.A. 65,536
81.187.0.0/16 AS41489 Andrews & Arnold Ltd 65,536
81.223.0.0/16 AS8412 T-Mobile Austria GmbH 65,536
81.221.0.0/16 AS1836 green.ch AG 65,536
81.202.0.0/16 AS6739 Cableuropa - ONO 65,536
81.220.0.0/16 AS15557 Societe Francaise Du Radiotelephone - SFR SA 65,536
81.202.0.0/16 AS6739 Cableuropa - ONO 65,536
81.188.0.0/16 AS3257 GTT Communications Belgium N.V. 65,536
81.86.0.0/16 AS13285 TalkTalk Communications Limited 65,536
81.33.0.0/16 AS3352 Telefonica de Espana SAU 65,536
81.32.0.0/16 AS3352 Telefonica de Espana SAU 65,536
81.56.0.0/16 AS29447 Iliad / Free SAS 65,536
81.34.0.0/16 AS3352 Telefonica de Espana SAU 65,536
81.191.0.0/16 AS2116 GLOBALCONNECT AS 65,536
81.44.0.0/16 AS3352 Telefonica de Espana SAU 65,536
81.202.0.0/16 AS12430 Cableuropa - ONO 65,536
81.57.0.0/16 AS29447 Iliad / Free SAS 65,536
81.202.0.0/16 AS12430 Cableuropa - ONO 65,536
81.40.0.0/16 AS3352 Telefonica de Espana SAU 65,536
81.87.0.0/16 AS786 Jisc Services Limited 65,536
81.38.0.0/16 AS3352 Telefonica de Espana SAU 65,536
81.216.0.0/16 AS1257 Tele2 Sverige AB 65,536

Hosted domains

There are 8,281 domain names hosted across 3,044 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 gdgreenock.co.uk 881
81.145.16.13 ipadserver.co.uk 260
81.145.31.217 gdfetchingham.co.uk 251
81.145.31.222 marketrasen-gdm.co.uk 159
81.134.40.54 bancroftleisure.co.uk 109
81.144.251.155 campingandcaravanningclub.co.uk 99
81.144.162.21 lubricantsales.co.uk 78
81.145.16.53 mustardpotvets.com 67
81.144.218.84 airconditioningrepairsliverpool.uk 60
81.128.160.145 vowsweddingvideos.co.uk 58
81.133.245.70 lockandsonsroofing.co.uk 50
81.145.58.165 screencontracts.co.uk 42
81.128.180.98 propertyprofile.co.uk 42
81.144.179.205 gardeningdiary.co.uk 41
81.133.252.110 fred-force.com 41
81.145.167.201 go-tcha-evolve.co.uk 36
81.144.224.25 brandontoolhire.eu 35
81.150.25.196 clearsoftwaresolutions.co.uk 29
81.150.7.16 bellait.support 29
81.139.48.154 legalindemnitynews.co.uk 25

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.
Useful for Cybersecurity
Read more

Pingable IPs

999,689 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
81.128.158.169 AS2856 British Telecommunications PLC 1.26ms from London, GB
81.128.147.137 AS2856 British Telecommunications PLC 1.42ms from London, GB
81.128.167.145 AS2856 British Telecommunications PLC 0.93ms from London, GB
81.128.174.225 AS2856 British Telecommunications PLC 1.87ms from London, GB
81.128.163.10 AS2856 British Telecommunications PLC 1.07ms from London, GB
81.128.166.203 AS2856 British Telecommunications PLC 2.69ms from London, GB
81.128.149.163 AS2856 British Telecommunications PLC 3.45ms from London, GB
81.128.131.182 AS2856 British Telecommunications PLC 2.30ms from London, GB
81.128.130.210 AS2856 British Telecommunications PLC 0.89ms from London, GB
81.128.139.218 AS2856 British Telecommunications PLC 2.81ms from London, GB
81.128.151.33 AS2856 British Telecommunications PLC 0.87ms from London, GB
81.128.133.193 AS2856 British Telecommunications PLC 1.03ms from London, GB
81.128.140.150 AS2856 British Telecommunications PLC 1.20ms from London, GB
81.128.144.46 AS2856 British Telecommunications PLC 2.70ms from London, GB
81.128.153.40 AS2856 British Telecommunications PLC 1.11ms from London, GB
81.128.146.185 AS2856 British Telecommunications PLC 1.21ms from London, GB
81.128.159.201 AS2856 British Telecommunications PLC 1.72ms from London, GB
81.128.168.130 AS2856 British Telecommunications PLC 3.73ms from London, GB
81.128.171.74 AS2856 British Telecommunications PLC 0.93ms from London, GB
81.128.157.114 AS2856 British Telecommunications PLC 4.83ms from London, GB
81.128.135.185 AS2856 British Telecommunications PLC 0.98ms from London, GB
81.128.137.108 AS2856 British Telecommunications PLC 3.50ms from London, GB
81.128.169.25 AS2856 British Telecommunications PLC 1.20ms from London, GB
81.128.138.185 AS2856 British Telecommunications PLC 1.72ms from London, GB
81.128.154.57 AS2856 British Telecommunications PLC 3.65ms 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
35.167.179.219 AS16509 Amazon.com, Inc. 0.20ms from Boardman, US
190.173.134.43 AS22927 Telefonica de Argentina 1.98ms from Buenos Aires, AR
181.44.169.171 AS27747 Telecentro S.A. 5.46ms from Buenos Aires, AR
58.42.8.27 AS4134 CHINANET-BACKBONE 1.64ms from Guiyang, CN
93.240.52.75 AS3320 Deutsche Telekom AG 2.29ms from Hamburg, DE
73.84.83.75 AS7922 Comcast Cable Communications, LLC 6.79ms from Miami, US
217.251.30.27 AS3320 Deutsche Telekom AG 5.57ms from Nuernberg, DE
40.80.201.139 AS8075 Microsoft Corporation 0.22ms from San Antonio, US
167.80.137.91 AS14579 Edward D. Jones & Co., L.P. 7.02ms from St. Louis, US
110.177.76.27 AS4134 CHINANET-BACKBONE 0.89ms from Taiyuan, CN
180.7.177.171 AS4713 NTT DOCOMO BUSINESS,Inc. 16.52ms from Tokyo, JP
2.133.9.91 AS9198 JSC Kazakhtelecom 2.10ms from Almaty, KZ
203.154.61.107 AS4618 Internet Thailand Company Limited 2.79ms from Bangkok, TH
125.211.128.251 AS4837 CHINA UNICOM China169 Backbone 10.18ms from Changchun, CN
108.241.76.155 AS7018 AT&T Enterprises, LLC 16.45ms from Chicago, US
46.252.141.11 AS3209 Vodafone GmbH 7.01ms from Frankfurt am Main, DE
62.236.75.27 AS16086 DNA Oyj 0.74ms from Helsinki, FI
23.56.27.219 AS16625 Akamai Technologies, Inc. 0.52ms from Hong Kong, HK
90.197.90.43 AS5607 Sky UK Limited 1.56ms from London, GB
2.120.212.91 AS5607 Sky UK Limited 1.42ms from London, GB
69.201.165.235 AS12271 Charter Communications Inc 3.95ms from New York City, US
37.195.182.11 AS31200 Novotelecom Ltd 1.31ms from Novosibirsk, RU
115.179.165.91 AS2519 ARTERIA Networks Corporation 5.33ms from Osaka, JP
78.203.64.75 AS12322 Free SAS 1.20ms from Paris, FR
104.73.72.91 AS16625 Akamai Technologies, Inc. 0.22ms from Pittsburgh, US

Traceroute

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

$
traceroute -a -n -q1 -f3 81.130.167.234
traceroute to 81.130.167.234 (81.130.167.234): 64 hops max, 52 byte packets
4 [AS2856] 62.6.201.223 9.615 ms
5 *
6 [AS2856] 217.32.26.85 9.259 ms
7 [AS2856] 81.130.167.234 19.215 ms
Measurement taken from IPinfo ProbeNet in Edinburgh, GB
On

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

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