51.64.0.0/16

AS211077 · UK Home Office (The Secretary of State for the Home Department)

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Summary

Country	United Kingdom
Domain	homeoffice.gov.uk
ASN	AS211077
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

Read more

Pingable IPs

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

IP Address	ASN	Details
51.64.32.253	AS2856 British Telecommunications PLC	`4.01ms` 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
75.166.125.160	AS209 CenturyLink Communications, LLC	`2.37ms` from Denver, US
114.205.136.16	AS9318 SK Broadband Co Ltd	`1.96ms` from Incheon, KR
73.91.85.32	AS7922 Comcast Cable Communications, LLC	`6.20ms` from Miami, US
82.48.136.80	AS3269 Telecom Italia S.p.A.	`8.61ms` from Milan, IT
90.89.0.192	AS3215 Orange S.A.	`13.67ms` from Paris, FR
60.241.176.144	AS7545 TPG Telecom Limited	`1.11ms` from Perth, AU
192.175.31.128	AS11404 Wave Broadband	`0.47ms` from San Jose, US
69.107.164.96	AS7018 AT&T Enterprises, LLC	`1.57ms` from San Jose, US
173.2.89.112	AS6128 Cablevision Systems Corp.	`6.84ms` from Secaucus, US
1.240.25.80	AS9318 SK Broadband Co Ltd	`1.88ms` from Seoul, KR
122.9.47.128	AS23724 IDC, China Telecommunications Corporation	`4.13ms` from Tianjin, CN
84.139.182.96	AS3320 Deutsche Telekom AG	`3.99ms` from Frankfurt am Main, DE
120.83.144.64	AS136959 China Unicom Guangdong IP network	`3.23ms` from Guangzhou, CN
47.150.89.0	AS5650 Frontier Communications of America, Inc.	`2.88ms` from Los Angeles, US
75.135.210.16	AS20115 Charter Communications LLC	`19.21ms` from Minneapolis, US
217.254.1.64	AS3320 Deutsche Telekom AG	`6.66ms` from Nuernberg, DE
73.96.133.64	AS7922 Comcast Cable Communications, LLC	`4.60ms` from Portland, US
222.120.179.240	AS4766 Korea Telecom	`1.72ms` from Seoul, KR
49.63.234.80	AS4766 Korea Telecom	`6.65ms` from Seoul, KR
90.238.255.48	AS3301 Telia Company AB	`14.24ms` from Stockholm, SE
120.114.137.240	AS1659 Taiwan Academic Network (TANet) Information Center	`3.82ms` from Taichung, TW
66.199.251.160	AS21782 Plateau Telecommunications Incorporated	`9.56ms` from Albuquerque, US
213.22.91.240	AS2860 NOS COMUNICACOES, S.A.	`8.19ms` from Braga, PT
13.86.126.176	AS8075 Microsoft Corporation	`0.20ms` from Des Moines, US
91.62.204.224	AS3320 Deutsche Telekom AG	`3.13ms` from Hamburg, DE

Traceroute

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

traceroute -a -n -q1 -f2 -m9 51.64.66.110

traceroute to 51.64.66.110 (51.64.66.110): 9 hops max, 52 byte packets

2 [AS42831] 31.132.0.89 0.205 ms

3 *

4 [AS42831] 78.110.166.92 3.713 ms

5 [AS2856] 62.6.204.202 4.703 ms

6 [AS2856] 62.172.102.27 5.193 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Coventry, GB

On January 9th 2026

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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