51.111.0.0/16

AS8075 · Microsoft Corporation

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Summary

Country	United Kingdom
Domain	microsoft.com
ASN	AS8075
Registry	RIPE
ID	UK-MICROSOFT

WHOIS Details

inetnum:        51.111.0.0 - 51.111.255.255
country:        GB
netname:        UK-MICROSOFT
org:            ORG-MA42-RIPE
admin-c:        DH5439-RIPE
tech-c:         MRPA3-RIPE
status:         LEGACY
mnt-by:         RIPE-NCC-LEGACY-MNT
mnt-by:         MICROSOFT-MAINT
created:        2020-11-06T12:03:12Z
last-modified:  2024-05-08T16:32:39Z
source:         RIPE
abuse-email:    abuse@microsoft.com
abuse-c:        MAC274-RIPE
abuse-org:      ORG-MA42-RIPE

organisation:   ORG-MA42-RIPE
org-name:       Microsoft Limited
country:        GB
org-type:       LIR
descr:          Microsoft Corporation AS8075
descr:          To report suspected security issues specific to
descr:          traffic emanating from Microsoft online services,
descr:          including the distribution of malicious content
descr:          or other illicit or illegal material through a
descr:          Microsoft online service, please submit reports
descr:          to:
descr:          * https://cert.microsoft.com
descr:          For SPAM and other abuse issues, such as Microsoft
descr:          Accounts, please contact:
descr:          * abuse@microsoft.com
descr:          To report security vulnerabilities in Microsoft
descr:          products and services, please contact:
descr:          * secure@microsoft.com
descr:          For legal and law enforcement-related requests,
descr:          please contact:
descr:          * msndcc@microsoft.com
descr:          For routing, peering or DNS issues, please
descr:          contact:
descr:          * IOC@microsoft.com
address:        One Microsoft Way
address:        WA 98052
address:        Redmond
address:        UNITED STATES
phone:          +1 425 882 8080
fax-no:         +1 425 936 7329
e-mail:         iphostmaster@microsoft.com
abuse-c:        MAC274-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        MICROSOFT-MAINT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MICROSOFT-MAINT
created:        2004-04-17T12:18:10Z
last-modified:  2022-03-08T18:20:31Z
source:         RIPE

role:           Microsoft Routing, Peering, and DNS
address:        One Microsoft Way
address:        Redmond, WA 98052
e-mail:         ioc@microsoft.com
nic-hdl:        MRPA3-RIPE
mnt-by:         MICROSOFT-MAINT
created:        2014-08-26T16:25:24Z
last-modified:  2014-08-26T16:25:24Z
source:         RIPE

person:         Divya Quamara
address:        One Microsoft Way
address:        Redmond, WA 98052
phone:          +1-425-882-8080
nic-hdl:        DH5439-RIPE
mnt-by:         MICROSOFT-MAINT
created:        2014-08-26T16:24:14Z
last-modified:  2016-02-19T07:09:41Z
source:         RIPE

Nearby Ranges

BGP prefixes that overlap with 51.0.0.0/8

Range	ASN	Company	Num of IPs
51.186.0.0/15	AS5607	SKY UK Limited	131,072
51.176.0.0/15	AS16509	A100 ROW Inc	131,072
51.236.0.0/15	AS16509	A100 ROW Inc	131,072
51.182.0.0/15	AS5607	SKY UK Limited	131,072
51.158.0.0/15	AS12876	Scaleway	131,072
51.204.0.0/15	AS16509	A100 ROW Inc	131,072
51.220.0.0/15	AS16509	A100 ROW Inc	131,072
51.232.0.0/15	AS16509	A100 ROW Inc	131,072
51.34.0.0/15	AS16509	A100 Row Inc	131,072
51.174.0.0/15	AS29695	Altibox AS	131,072
51.6.0.0/15	AS6871		131,072
51.16.0.0/15	AS16509	A100 Row Inc	131,072
51.72.0.0/15	AS16509	A100 Row Inc	131,072
51.192.0.0/15	AS16509	A100 ROW Inc	131,072
51.208.0.0/15	AS16509	A100 ROW Inc	131,072
51.216.0.0/15	AS16509	A100 ROW Inc	131,072
51.226.0.0/15	AS16509	A100 Row Inc	131,072
51.228.0.0/15	AS16509	A100 ROW Inc	131,072
51.206.0.0/15	AS16509	A100 Row Inc	131,072
51.248.0.0/15	AS16509	A100 ROW Inc	131,072
51.48.0.0/15	AS16509	A100 ROW Inc	131,072
51.252.0.0/15	AS25019	Saudi Telecom Company JSC	131,072
51.188.0.0/15	AS16509	A100 ROW Inc	131,072
51.190.0.0/15	AS5607	SKY UK Limited	131,072
51.4.0.0/15	AS8075	Microsoft Deutschland MCIO GmbH	131,072
51.200.0.0/15	AS16509	A100 ROW Inc	131,072
51.196.0.0/15	AS16509	A100 ROW Inc	131,072
51.94.0.0/15	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
51.164.0.0/15	AS16509	A100 ROW Inc	131,072
51.172.0.0/15	AS16509	A100 ROW Inc	131,072
51.212.0.0/15	AS16509	A100 ROW Inc	131,072
51.214.0.0/15	AS16509	A100 Row Inc	131,072
51.168.0.0/15	AS16509	A100 ROW Inc	131,072
51.224.0.0/15	AS16509	A100 ROW Inc	131,072
51.254.0.0/15	AS16276	OVH SAS	131,072
51.166.0.0/15	AS16509	A100 Row Inc	131,072
51.180.0.0/15	AS16509	A100 ROW Inc	131,072
51.202.0.0/15	AS16509	A100 Row Inc	131,072
51.184.0.0/15	AS16509	A100 ROW Inc	131,072
51.244.0.0/15	AS16509	A100 ROW Inc	131,072
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
51.118.0.0/16	AS16509	A100 ROW Inc	65,536
51.150.0.0/16	AS16509	A100 Row Inc	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
51.111.10.123	thyrium.net	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

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
40.118.41.144	AS8075 Microsoft Corporation	`0.21ms` from Amsterdam, NL
110.253.31.224	AS4837 CHINA UNICOM China169 Backbone	`5.94ms` from Beijing, CN
41.251.223.48	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`4.03ms` from Casablanca, MA
67.176.18.112	AS7922 Comcast Cable Communications, LLC	`2.46ms` from Denver, US
216.18.250.224	AS20101 Michwave Technologies, Inc.	`4.70ms` from Detroit, US
95.112.105.96	AS6805 Telefonica Germany GmbH & Co.OHG	`2.18ms` from Hamburg, DE
89.114.35.240	AS12353 Vodafone Portugal	`2.40ms` from Lisbon, PT
151.83.169.160	AS1267 WIND TRE S.P.A.	`4.73ms` from Milan, IT
174.17.50.32	AS209 CenturyLink Communications, LLC	`1.22ms` from Phoenix, US
187.62.234.0	AS262663 METROFLEX TELECOMUNICACOES LTDA	`19.70ms` from Sao Paulo, BR
175.215.115.48	AS4766 Korea Telecom	`7.86ms` from Seoul, KR
3.1.177.32	AS16509 Amazon.com, Inc.	`0.13ms` from Singapore, SG
134.148.24.112	AS7575 Australian Academic and Research Network (AARNet)	`4.62ms` from Sydney, AU
171.117.42.128	AS4837 CHINA UNICOM China169 Backbone	`2.88ms` from Taiyuan, CN
111.168.162.32	AS2518 BIGLOBE Inc.	`9.52ms` from Tokyo, JP
130.35.198.0	AS31898 Oracle Corporation	`0.31ms` from Ashburn, US
34.174.15.80	AS396982 Google LLC	`0.13ms` from Dallas, US
52.154.174.208	AS8075 Microsoft Corporation	`0.28ms` from Des Moines, US
18.192.194.64	AS16509 Amazon.com, Inc.	`0.35ms` from Frankfurt am Main, DE
18.159.9.112	AS16509 Amazon.com, Inc.	`0.19ms` from Frankfurt am Main, DE
80.143.131.64	AS3320 Deutsche Telekom AG	`7.43ms` from Frankfurt am Main, DE
87.80.241.160	AS5607 Sky UK Limited	`5.84ms` from London, GB
151.6.116.0	AS1267 WIND TRE S.P.A.	`6.59ms` from Rome, IT
87.19.76.96	AS3269 Telecom Italia S.p.A.	`7.64ms` from Rome, IT
211.49.73.0	AS9318 SK Broadband Co Ltd	`1.78ms` from Seoul, KR

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 51.111.23.6

traceroute to 51.111.23.6 (51.111.23.6): 9 hops max, 52 byte packets

2 [AS9658] 120.89.51.3 0.492 ms

3 *

4 *

5 [AS9658] 180.232.63.78 0.886 ms

6 [AS8075] 104.44.13.56 0.593 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Manila, PH

On October 30th 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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