51.64.0.0/16

AS211015 · UK Home Office (The Secretary of State for the Home Department)

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Summary

Country	United Kingdom
Domain	homeoffice.gov.uk
ASN	AS211015
Registry	RIPE
ID	UK-HO-LECN

WHOIS Details

inetnum:        51.64.0.0 - 51.64.255.255
netname:        UK-HO-LECN
country:        GB
org:            ORG-UHOT1-RIPE
admin-c:        NET26-RIPE
tech-c:         NET26-RIPE
abuse-c:        AR62973-RIPE
status:         LEGACY
mnt-by:         lir-uk-ukhome-1-MNT
created:        2021-05-28T14:17:16Z
last-modified:  2021-09-14T06:02:01Z
source:         RIPE
abuse-email:    N&INetworkOperations@homeoffice.gov.uk
abuse-c:        AR62973-RIPE
abuse-org:      ORG-UHOT1-RIPE

organisation:   ORG-UHOT1-RIPE
org-name:       UK Home Office (The Secretary of State for the Home Department)
org-type:       LIR
address:        2 Marsham Street
address:        SW1P 4DF
address:        London
address:        UNITED KINGDOM
country:        GB
phone:          +44 345 010 0125
e-mail:         N&INetworkOperations@homeoffice.gov.uk
admin-c:        NET26-RIPE
tech-c:         NET26-RIPE
abuse-c:        AR62973-RIPE
mnt-ref:        lir-uk-ukhome-1-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         lir-uk-ukhome-1-MNT
created:        2021-04-23T11:51:44Z
last-modified:  2021-07-07T11:01:59Z
source:         RIPE

role:           Network Engineering Team
address:        2 Marsham Street
address:        SW1P 4DF
address:        London
address:        UNITED KINGDOM
phone:          +44 345 010 0125
e-mail:         N&INetworkOperations@homeoffice.gov.uk
nic-hdl:        NET26-RIPE
mnt-by:         lir-uk-ukhome-1-MNT
created:        2021-04-23T11:51:43Z
last-modified:  2021-04-23T11:51:44Z
source:         RIPE

Nearby Ranges

BGP prefixes that overlap with 51.0.0.0/8

Range	ASN	Company	Num of IPs
51.6.0.0/15	AS6871		131,072
51.176.0.0/15	AS16509	A100 ROW Inc	131,072
51.94.0.0/15	AS16509	A100 ROW Inc	131,072
51.158.0.0/15	AS12876	Scaleway	131,072
51.214.0.0/15	AS16509	A100 Row Inc	131,072
51.244.0.0/15	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
51.16.0.0/15	AS16509	A100 Row Inc	131,072
51.216.0.0/15	AS16509	A100 ROW Inc	131,072
51.192.0.0/15	AS16509	A100 ROW Inc	131,072
51.172.0.0/15	AS16509	A100 ROW Inc	131,072
51.254.0.0/15	AS16276	OVH SAS	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
51.4.0.0/15	AS8075	Microsoft Deutschland MCIO GmbH	131,072
51.196.0.0/15	AS16509	A100 ROW Inc	131,072
51.190.0.0/15	AS5607	SKY UK Limited	131,072
51.184.0.0/15	AS16509	A100 ROW Inc	131,072
51.252.0.0/15	AS25019	Saudi Telecom Company JSC	131,072
51.208.0.0/15	AS16509	A100 ROW Inc	131,072
51.188.0.0/15	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
51.228.0.0/15	AS16509	A100 ROW Inc	131,072
51.20.0.0/16	AS16509	A100 ROW Inc	65,536
51.125.0.0/16	AS16509	A100 ROW Inc	65,536
51.155.0.0/16	AS13037	Zen Internet Limited	65,536
51.160.0.0/16	AS16509	A100 ROW Inc	65,536
51.129.0.0/16	AS16509	A100 ROW Inc	65,536
51.148.0.0/16	AS13037	Zen Internet Limited	65,536
51.139.0.0/16	AS16509	A100 ROW Inc	65,536
51.150.0.0/16	AS16509	A100 Row Inc	65,536
51.112.0.0/16	AS16509	A100 ROW Inc	65,536
51.110.0.0/16	AS16509	A100 Row Inc	65,536
51.21.0.0/16	AS16509	A100 ROW Inc	65,536
51.108.0.0/16	AS16509	A100 Row Inc	65,536
51.91.0.0/16	AS16276	OVH SAS	65,536
51.121.0.0/16	AS16509	A100 ROW Inc	65,536
51.118.0.0/16	AS16509	A100 ROW Inc	65,536
51.89.0.0/16	AS16276	OVH SAS	65,536

Hosted domains

There is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
51.64.137.76	ctmo.cn	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

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Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
66.199.251.160	AS21782 Plateau Telecommunications Incorporated	`9.58ms` from Albuquerque, US
105.111.156.224	AS36947 Telecom Algeria	`13.06ms` from Algiers, DZ
1.27.100.48	AS4837 CHINA UNICOM China169 Backbone	`15.47ms` from Changchun, CN
128.105.146.32	AS59 University of Wisconsin Madison	`5.16ms` from Chicago, US
213.22.13.208	AS2860 NOS COMUNICACOES, S.A.	`6.83ms` from Lisbon, PT
23.241.8.144	AS20001 Charter Communications Inc	`4.79ms` from Los Angeles, US
143.42.226.80	AS63949 Akamai Connected Cloud	`0.18ms` from Morris Plains, US
104.248.230.64	AS14061 DigitalOcean, LLC	`0.20ms` from New York City, US
133.237.158.128	AS23820 Rakuten Group, Inc.	`1.63ms` from Osaka, JP
153.156.174.128	AS4713 NTT DOCOMO BUSINESS,Inc.	`2.42ms` from Osaka, JP
27.200.1.48	AS4837 CHINA UNICOM China169 Backbone	`7.76ms` from Qingdao, CN
45.88.158.0	AS208380 Miram Ltd.	`0.74ms` from Saint Petersburg, RU
49.171.125.96	AS17858 LG POWERCOMM	`2.81ms` from Seoul, KR
101.43.21.96	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.29ms` from Shanghai, CN
153.150.69.224	AS4713 NTT DOCOMO BUSINESS,Inc.	`3.21ms` from Tokyo, JP
70.51.97.48	AS577 Bell Canada	`1.17ms` from Toronto, CA
85.152.224.160	AS12946 R Cable y Telecable Telecomunicaciones, S.A.U.	`10.35ms` from A Coruna, ES
73.201.89.48	AS7922 Comcast Cable Communications, LLC	`8.62ms` from Ashburn, US
178.147.250.96	AS6799 Ote SA (Hellenic Telecommunications Organisation)	`16.33ms` from Athens, GR
123.114.14.80	AS4808 China Unicom Beijing Province Network	`3.96ms` from Beijing, CN
44.241.197.224	AS16509 Amazon.com, Inc.	`0.17ms` from Boardman, US
69.68.226.128	AS19901 Brightspeed	`7.09ms` from Dallas, US
187.58.85.96	AS18881 TELEFÔNICA BRASIL S.A	`1.60ms` from Fortaleza, BR
109.156.86.160	AS2856 British Telecommunications PLC	`6.89ms` from London, GB
153.99.196.48	AS4837 CHINA UNICOM China169 Backbone	`5.99ms` from Nanjing, CN

Traceroute

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

traceroute -a -n -q1 -f2 -m6 51.64.4.58

traceroute to 51.64.4.58 (51.64.4.58): 6 hops max, 52 byte packets

2 [AS20278] 167.88.4.233 11.097 ms

3 [AS20278] 167.88.4.218 0.284 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Chicago, US

On November 14th 2025

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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