1. All IP Ranges
  2. 51.0.0.0/8
  3. 51.9.0.0/16
  4. AS6871  | 51.9.0.0/16

51.9.0.0/16

AS6871  ·  Plusnet

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Summary

Country United Kingdom
Domain plus.net
ASN AS6871
Registry RIPE
ID FORCE9

WHOIS Details

inetnum:        51.9.0.0 - 51.9.255.255
remarks:        Please send abuse notification to abuse@plus.net
netname:        FORCE9
descr:          PlusNet plc.
org:            ORG-BPIS1-RIPE
country:        GB
admin-c:        PNET2-RIPE
tech-c:         PNET2-RIPE
status:         LEGACY
mnt-by:         RIPE-NCC-LEGACY-MNT
mnt-by:         MAINT-AS6871
mnt-by:         BTNET-INFRA-MNT
created:        2015-06-17T07:29:25Z
last-modified:  2025-05-12T17:35:27Z
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:           Plusnet Hostmaster
address:        PlusNet Plc
address:        The Balance
address:        2 Pinfold Street
address:        Sheffield
address:        S1 2GU
address:        UK
phone:          +44 114 2200084
e-mail:         hostmaster@plus.net
abuse-mailbox:  abuse@plus.net
remarks:        ------------------------------------------------
remarks:        Please do NOT e-mail abuse to the contacts given
remarks:        here, e-mail them to ABUSE@PLUS.NET instead.
remarks:        All email sent to other listed addresses will
remarks:        be deleted!
remarks:        ------------------------------------------------
remarks:        Network Status and Information Page:
remarks:        http://status.plus.net
remarks:        http://support.plus.net
remarks:        ------------------------------------------------
remarks:        Support 24*7 Phone: (UK) 0845 140 0200
remarks:        ------------------------------------------------
admin-c:        JW7886-RIPE
tech-c:         DS3916-RIPE
nic-hdl:        PNET2-RIPE
notify:         ripe-admin@plus.net
mnt-by:         MAINT-AS6871
created:        2002-05-16T12:18:00Z
last-modified:  2018-01-17T15:40:44Z
source:         RIPE

route:          51.9.0.0/16
descr:          PlusNet plc.
origin:         AS6871
mnt-by:         MAINT-AS6871
created:        2015-12-10T11:53:03Z
last-modified:  2015-12-10T11:53:03Z
source:         RIPE

Nearby Ranges

BGP prefixes that overlap with 51.0.0.0/8

Range ASN Company Num of IPs
51.190.0.0/15 AS5607 SKY UK Limited 131,072
51.228.0.0/15 AS16509 A100 ROW Inc 131,072
51.94.0.0/15 AS16509 A100 ROW Inc 131,072
51.6.0.0/15 AS6871 131,072
51.188.0.0/15 AS16509 A100 ROW Inc 131,072
51.176.0.0/15 AS16509 A100 ROW Inc 131,072
51.236.0.0/15 AS16509 A100 ROW Inc 131,072
51.48.0.0/15 AS16509 A100 ROW Inc 131,072
51.182.0.0/15 AS5607 SKY UK Limited 131,072
51.158.0.0/15 AS12876 Scaleway 131,072
51.184.0.0/15 AS16509 A100 ROW Inc 131,072
51.214.0.0/15 AS16509 A100 Row Inc 131,072
51.254.0.0/15 AS16276 OVH SAS 131,072
51.244.0.0/15 AS16509 A100 ROW Inc 131,072
51.212.0.0/15 AS16509 A100 ROW Inc 131,072
51.232.0.0/15 AS16509 A100 ROW Inc 131,072
51.248.0.0/15 AS16509 A100 ROW Inc 131,072
51.34.0.0/15 AS16509 A100 Row Inc 131,072
51.220.0.0/15 AS16509 A100 ROW Inc 131,072
51.174.0.0/15 AS29695 Altibox AS 131,072
51.186.0.0/15 AS5607 SKY UK Limited 131,072
51.16.0.0/15 AS16509 A100 Row Inc 131,072
51.196.0.0/15 AS16509 A100 ROW Inc 131,072
51.216.0.0/15 AS16509 A100 ROW Inc 131,072
51.252.0.0/15 AS25019 Saudi Telecom Company JSC 131,072
51.192.0.0/15 AS16509 A100 ROW Inc 131,072
51.208.0.0/15 AS16509 A100 ROW Inc 131,072
51.172.0.0/15 AS16509 A100 ROW Inc 131,072
51.156.0.0/15 AS16509 A100 Row Inc 131,072
51.122.0.0/15 AS16509 A100 Row Inc 131,072
51.168.0.0/15 AS16509 A100 ROW Inc 131,072
51.180.0.0/15 AS16509 A100 ROW Inc 131,072
51.224.0.0/15 AS16509 Amazon Data Services European Sovereign Cloud GmbH 131,072
51.4.0.0/15 AS8075 Microsoft Deutschland MCIO GmbH 131,072
51.103.0.0/16 AS8075 Microsoft Limited 65,536
51.107.0.0/16 AS8075 Microsoft Limited UK 65,536
51.109.0.0/16 AS8075 Microsoft Limited 65,536
51.111.0.0/16 AS8075 Microsoft Limited 65,536
51.116.0.0/16 AS8075 Microsoft Limited UK 65,536
51.120.0.0/16 AS8075 Microsoft Limited UK 65,536
51.124.0.0/16 AS8075 Microsoft Limited UK 65,536
51.126.0.0/16 AS8075 Microsoft Limited 65,536
51.132.0.0/16 AS8075 Microsoft Limited UK 65,536
51.138.0.0/16 AS8075 Microsoft Limited 65,536
51.42.0.0/16 AS8075 Microsoft Limited 65,536
51.51.0.0/16 AS8075 Microsoft Limited UK 65,536
51.53.0.0/16 AS8075 Microsoft Limited UK 65,536
51.8.0.0/16 AS8075 Microsoft Deutschland MCIO GmbH 65,536
51.1.0.0/16 AS8075 Microsoft Limited 65,536
51.20.0.0/16 AS16509 A100 ROW Inc 65,536

Hosted domains

There are 45 domain names hosted across 44 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
51.9.55.149 nussole.eu 4
51.9.139.254 rumr.co.uk 1
51.9.136.99 tomsmediahub.uk 1
51.9.134.10 froodleplex.com 1
51.9.185.50 katiemccoy.co.uk 1
51.9.18.13 v29consulting.co.uk 1
51.9.33.212 manchesterroad.fun 1
51.9.122.225 cbict.com 1
51.9.77.61 owen.world 1
51.9.184.163 listerm.uk 1
51.9.79.154 logiseccloud.com 1
51.9.65.171 orangeandred.co.uk 1
51.9.204.200 servershards.com 1
51.9.165.219 asmsolutions.co.uk 1
51.9.42.185 amieheardschoolofdance.co.uk 1
51.9.93.183 goodideas.com 1
51.9.144.60 cfcontrol.co.uk 1
51.9.172.162 rageypeep.gg 1
51.9.62.38 normansell.org 1
51.9.99.93 ngttk.org 1

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

39,624 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
51.9.36.174 AS6871 Plusnet 1.94ms from London, GB
51.9.89.166 AS6871 Plusnet 5.72ms from London, GB
51.9.7.243 AS6871 Plusnet 7.38ms from London, GB
51.9.30.183 AS6871 Plusnet 2.48ms from London, GB
51.9.75.117 AS6871 Plusnet 4.28ms from London, GB
51.9.41.211 AS6871 Plusnet 1.72ms from London, GB
51.9.84.81 AS6871 Plusnet 9.98ms from London, GB
51.9.88.1 AS6871 Plusnet 5.86ms from London, GB
51.9.9.197 AS6871 Plusnet 6.78ms from London, GB
51.9.68.143 AS6871 Plusnet 4.46ms from London, GB
51.9.55.243 AS6871 Plusnet 2.23ms from London, GB
51.9.0.172 AS6871 Plusnet 8.43ms from London, GB
51.9.11.109 AS6871 Plusnet 4.51ms from London, GB
51.9.82.108 AS6871 Plusnet 6.42ms from London, GB
51.9.72.163 AS6871 Plusnet 5.38ms from London, GB
51.9.74.157 AS6871 Plusnet 2.16ms from London, GB
51.9.10.62 AS6871 Plusnet 9.88ms from London, GB
51.9.32.96 AS6871 Plusnet 3.33ms from London, GB
51.9.13.138 AS6871 Plusnet 6.95ms from London, GB
51.9.33.160 AS6871 Plusnet 9.06ms from London, GB
51.9.1.252 AS6871 Plusnet 4.60ms from London, GB
51.9.20.230 AS6871 Plusnet 8.57ms from London, GB
51.9.2.86 AS6871 Plusnet 4.44ms from London, GB
51.9.52.141 AS6871 Plusnet 1.88ms from London, GB
51.9.65.228 AS6871 Plusnet 2.35ms 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
47.253.70.176 AS45102 Alibaba (US) Technology Co., Ltd. 0.28ms from Ashburn, US
161.10.2.208 AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC 8.79ms from Bogota, CO
181.86.22.32 AS7303 Telecom Argentina S.A. 1.27ms from Buenos Aires, AR
97.118.252.144 AS209 CenturyLink Communications, LLC 1.87ms from Denver, US
98.209.170.144 AS7922 Comcast Cable Communications, LLC 8.33ms from Flint, US
79.28.89.0 AS3269 Telecom Italia S.p.A. 4.24ms from Milan, IT
5.128.129.144 AS31200 Novotelecom Ltd 1.35ms from Novosibirsk, RU
133.204.73.96 AS2518 BIGLOBE Inc. 17.30ms from Osaka, JP
128.182.65.16 AS1207 Pittsburgh Supercomputing Center 1.08ms from Pittsburgh, US
74.123.167.192 AS25961 Alyrica Networks Inc. 3.79ms from Portland, US
177.84.100.0 AS262582 Netsul Internet Banda Larga LTDA 16.25ms from Sao Paulo, BR
47.123.147.144 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 3.46ms from Shanghai, CN
223.217.106.240 AS4713 NTT DOCOMO BUSINESS,Inc. 3.29ms from Tokyo, JP
104.172.20.80 AS20001 Charter Communications Inc 6.06ms from Los Angeles, US
198.16.197.80 AS1403 EBOX 1.30ms from Montreal, CA
93.181.213.224 AS12389 PJSC Rostelecom 11.13ms from Moscow, RU
46.73.202.80 AS12714 PJSC MegaFon 10.71ms from Moscow, RU
90.110.193.48 AS3215 Orange S.A. 6.37ms from Paris, FR
52.183.37.64 AS8075 Microsoft Corporation 0.18ms from Quincy, US
50.29.181.176 AS3737 PenTeleData Inc. 10.52ms from Secaucus, US
191.58.33.64 AS4230 CLARO S.A. 14.80ms from São Paulo, BR
192.115.61.128 AS8551 Bezeq International Ltd. 0.93ms from Tel Aviv, IL
218.221.44.48 AS2527 Sony Network Communications Inc. 4.90ms from Tokyo, JP
24.183.162.112 AS20115 Charter Communications LLC 20.00ms from Ashburn, US
123.119.162.32 AS4808 China Unicom Beijing Province Network 3.42ms from Beijing, CN

Traceroute

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

$
traceroute -a -n -q1 -f3 51.9.40.142
traceroute to 51.9.40.142 (51.9.40.142): 64 hops max, 52 byte packets
5 [AS2856] 194.74.16.146 1.871 ms
6 [AS2856] 109.159.255.3 1.849 ms
7 *
8 *
9 [AS6871] 51.9.40.142 14.199 ms
Measurement taken from IPinfo ProbeNet in London, 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.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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