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
81.212.0.0/14 AS9121 Turk Telekomunikasyon Anonim Sirketi 262,144
81.68.0.0/14 AS45090 Tencent Cloud Computing (Beijing) Co., Ltd 262,144
81.64.0.0/14 AS15557 Societe Francaise Du Radiotelephone - SFR SA 262,144
81.204.0.0/14 AS1136 KPN B.V. 262,144
81.76.0.0/14 AS5378 Vodafone Limited 262,144
81.60.0.0/15 AS12430 VODAFONE ONO, S.A. 131,072
81.82.0.0/15 AS6848 Telenet BV 131,072
81.62.0.0/15 AS3303 Swisscom (Schweiz) AG 131,072
81.164.0.0/15 AS6848 Telenet BV 131,072
81.178.0.0/15 AS13285 TalkTalk Communications Limited 131,072
81.56.0.0/15 AS29447 Free SAS 131,072
81.166.0.0/15 AS29695 Lyse Tele AS 131,072
81.182.0.0/15 AS5483 Magyar Telekom Plc. 131,072
81.218.0.0/16 AS8551 Bezeq International Ltd. 65,536
81.187.0.0/16 AS41489 Andrews & Arnold Ltd 65,536
81.192.0.0/16 AS6713 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM 65,536
81.80.0.0/16 AS3215 Orange S.A. 65,536
81.223.0.0/16 AS8412 T-Mobile Austria GmbH 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
81.188.0.0/16 AS3257 GTT Communications Belgium N.V. 65,536
81.190.0.0/16 AS21021 Multimedia Polska Sp. z o.o. 65,536
81.187.0.0/16 AS20712 Andrews & Arnold Ltd 65,536
81.36.0.0/16 AS3352 Telefonica de Espana SAU 65,536
81.189.0.0/16 AS8437 Network of Hutchison Drei Austria GmbH 65,536
81.87.0.0/16 AS786 Jisc Services Limited 65,536
81.39.0.0/16 AS3352 Telefonica de Espana SAU 65,536
81.195.0.0/16 AS8359 MTS PJSC 65,536
81.126.0.0/16 AS3269 Telecom Italia S.p.A. 65,536
81.32.0.0/16 AS3352 Telefonica de Espana SAU 65,536
81.191.0.0/16 AS2116 GLOBALCONNECT AS 65,536
81.202.0.0/16 AS6739 Cableuropa - ONO 65,536
81.219.0.0/16 AS12741 Netia SA 65,536
81.35.0.0/16 AS3352 Telefonica de Espana SAU 65,536
81.198.0.0/16 AS24921 SIA Tet 65,536
81.221.0.0/16 AS1836 green.ch AG 65,536
81.198.0.0/16 AS12578 SIA Tet 65,536
81.38.0.0/16 AS3352 Telefonica de Espana SAU 65,536
81.37.0.0/16 AS3352 Telefonica de Espana SAU 65,536
81.81.0.0/16 AS1267 WIND TRE S.P.A. 65,536
81.33.0.0/16 AS3352 Telefonica de Espana SAU 65,536
81.61.0.0/16 AS6739 ONO_HFC 65,536
81.44.0.0/16 AS3352 Telefonica de Espana SAU 65,536
81.34.0.0/16 AS3352 Telefonica de Espana SAU 65,536
81.56.0.0/16 AS29447 Iliad / Free SAS 65,536
81.40.0.0/16 AS3352 Telefonica de Espana SAU 65,536
81.57.0.0/16 AS29447 Iliad / Free SAS 65,536

Hosted domains

There are 8,142 domain names hosted across 3,056 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 ipadserver.co.uk 260
81.145.31.217 gdfetchingham.co.uk 251
81.144.251.155 campingandcaravanningclub.co.uk 98
81.142.113.81 mariefineart.com 88
81.144.162.21 lubricantsales.co.uk 78
81.145.16.53 petfocus.uk 75
81.144.218.84 airconliverpool.uk 61
81.133.245.70 lockandsonsroofing.co.uk 49
81.128.180.98 airline-people.co.uk 42
81.145.58.165 screenpayroll.co.uk 42
81.144.179.205 gardeningdiary.co.uk 41
81.145.167.201 go-tcha-evolve.co.uk 36
81.144.224.25 brandonhiredesk.co.uk 35
81.145.31.222 westmidlandsgaragedoorrepairs.co.uk 31
81.150.7.16 bellait.support 29
81.150.25.196 clearsoftwaresolutions.co.uk 29
81.128.250.13 munsontransport.co.uk 26
81.128.216.75 mondaysupport.com 25
81.139.48.154 cli.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

942,813 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
81.133.243.32 AS2856 British Telecommunications PLC 2.13ms from Erith, GB
81.134.214.6 AS2856 British Telecommunications PLC 0.75ms from London, GB
81.134.42.151 AS2856 British Telecommunications PLC 2.88ms from London, GB
81.134.222.38 AS2856 British Telecommunications PLC 0.85ms from London, GB
81.134.20.114 AS2856 British Telecommunications PLC 2.86ms from London, GB
81.134.116.116 AS2856 British Telecommunications PLC 0.99ms from London, GB
81.134.50.45 AS2856 British Telecommunications PLC 2.94ms from London, GB
81.134.217.82 AS2856 British Telecommunications PLC 0.83ms from London, GB
81.134.197.121 AS2856 British Telecommunications PLC 1.14ms from Erith, GB
81.134.52.173 AS2856 British Telecommunications PLC 3.28ms from Erith, GB
81.134.199.249 AS2856 British Telecommunications PLC 7.99ms from London, GB
81.134.44.32 AS2856 British Telecommunications PLC 2.96ms from London, GB
81.134.10.51 AS2856 British Telecommunications PLC 2.45ms from London, GB
81.134.242.109 AS2856 British Telecommunications PLC 1.20ms from London, GB
81.134.11.220 AS2856 British Telecommunications PLC 1.68ms from London, GB
81.133.214.142 AS2856 British Telecommunications PLC 2.45ms from London, GB
81.134.64.134 AS2856 British Telecommunications PLC 3.59ms from London, GB
81.134.18.164 AS2856 British Telecommunications PLC 2.68ms from London, GB
81.134.134.119 AS2856 British Telecommunications PLC 2.72ms from London, GB
81.134.196.82 AS2856 British Telecommunications PLC 1.03ms from London, GB
81.134.227.193 AS2856 British Telecommunications PLC 0.83ms from London, GB
81.134.202.28 AS2856 British Telecommunications PLC 1.57ms from London, GB
81.134.13.234 AS2856 British Telecommunications PLC 2.47ms from London, GB
81.134.107.238 AS2856 British Telecommunications PLC 1.64ms from London, GB
81.134.138.196 AS2856 British Telecommunications PLC 3.26ms 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
106.222.36.11 AS45609 Bharti Airtel Ltd. AS for GPRS Service 1.89ms from Ahmedabad, IN
85.144.10.11 AS50266 Odido Netherlands B.V. 4.00ms from Amsterdam, NL
1.91.8.75 AS17429 BEIJING GEHUA CATV NETWORK CO.LTD 5.20ms from Beijing, CN
75.241.69.75 AS6167 Verizon Business 17.92ms from Chicago, US
73.9.64.139 AS7922 Comcast Cable Communications, LLC 4.57ms from Chicago, US
37.80.168.235 AS3320 Deutsche Telekom AG 17.47ms from Duesseldorf, DE
82.186.84.203 AS3269 Telecom Italia S.p.A. 2.33ms from Milan, IT
100.1.62.107 AS701 Verizon Business 2.69ms from New York City, US
116.237.211.11 AS4812 China Telecom (Group) 2.32ms from Shanghai, CN
135.196.171.123 AS43180 Trunk Networks LTD 0.61ms from Singapore, SG
180.39.227.219 AS4713 NTT DOCOMO BUSINESS,Inc. 2.61ms from Tokyo, JP
38.74.36.27 AS398721 OXIO 5.78ms from Toronto, CA
217.116.215.27 AS31027 GlobalConnect A/S 0.41ms from Copenhagen, DK
3.73.145.219 AS16509 Amazon.com, Inc. 0.19ms from Frankfurt am Main, DE
84.186.28.107 AS3320 Deutsche Telekom AG 7.10ms from Frankfurt am Main, DE
154.120.107.139 AS37340 SPECTRANET LIMITED 13.15ms from Lagos, NG
67.182.8.43 AS7922 Comcast Cable Communications, LLC 11.03ms from Los Angeles, US
69.180.151.75 AS7922 Comcast Cable Communications, LLC 7.17ms from Minneapolis, US
34.194.210.27 AS14618 Amazon.com, Inc. 0.15ms from Reston, US
13.124.206.107 AS16509 Amazon.com, Inc. 0.32ms from Seoul, KR
114.205.139.27 AS9318 SK Broadband Co Ltd 5.12ms from Seoul, KR
78.88.168.91 AS29314 VECTRA S.A. 13.59ms from Warsaw, PL
213.108.110.59 AS47172 Greenhost BV 0.17ms from Amsterdam, NL
5.230.14.171 AS12586 GHOSTnet GmbH 0.36ms from Frankfurt am Main, DE
178.95.127.235 AS3320 Deutsche Telekom AG 0.47ms from Frankfurt am Main, DE

Traceroute

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

$
traceroute -a -n -q1 -m10 81.128.142.34
traceroute to 81.128.142.34 (81.128.142.34): 10 hops max, 52 byte packets
1 [AS198037] 80.71.227.1 0.174 ms
3 *
4 *
5 *
6 *
7 [AS2856] 109.159.254.9 11.605 ms
8 *
9 *
10 *
Measurement taken from IPinfo ProbeNet in Meppel, NL
On

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