All IP Ranges
51.0.0.0/8
AS8075 | 51.144.0.0/15

51.144.0.0/15

AS8075 · Microsoft Corporation

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Summary

Country	unknown
Domain	microsoft.com
ASN	AS8075
Registry	RIPE
ID	CLOUD

WHOIS Details

inetnum:        51.144.0.0 - 51.144.255.255
netname:        cloud
country:        EU
admin-c:        DH5439-RIPE
tech-c:         MRPA3-RIPE
status:         LEGACY
mnt-by:         MICROSOFT-MAINT
created:        2025-09-05T18:13:20Z
last-modified:  2025-09-05T18:13:20Z
source:         RIPE
abuse-email:    abuse@microsoft.com
abuse-c:        MAC274-RIPE
abuse-org:      ORG-MA42-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

route:          51.144.0.0/15
origin:         AS8075
descr:          Microsoft
notify:         radb@microsoft.com
mnt-by:         MICROSOFT-MAINT
created:        2020-07-22T15:06:00Z
last-modified:  2020-07-22T15:06:00Z
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 are 9,168 domain names hosted across 1,010 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
51.145.110.210	visitisleofwight.co.uk	823
51.144.188.75	boschaftermarket.com	399
51.144.190.143	educadhoc.fr	342
51.144.7.192	familieretshuset.dk	291
51.145.250.217	nets.eu	272
51.144.88.178	capsugel.com	239
51.144.159.14	natuurbegraafplaatsloonseheide.com	209
51.145.11.248	lloyds.com	208
51.144.182.8	cityandguilds.com	187
51.144.116.43	damirscorner.com	175
51.145.156.81	sapilimmobiliare.it	170
51.145.155.249	familjensjurist.se	168
51.144.186.101	heydoc.pl	162
51.144.107.53	ruokavirasto.fi	143
51.144.164.215	entia.cloud	141
51.145.26.96	lg-pretspourlaction.com	134
51.145.92.67	leicestershireweddingfairs.co.uk	128
51.145.232.156	franquiciashoy.es	120
51.145.209.49	kwaliteitwijzer.nl	111
51.144.54.180	alphatv.gr	99

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

17,396 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
51.145.157.22	AS8075 Microsoft Corporation	`0.22ms` from Amsterdam, NL
51.145.226.11	AS8075 Microsoft Corporation	`0.25ms` from Amsterdam, NL
51.145.248.15	AS8075 Microsoft Corporation	`0.27ms` from Amsterdam, NL
51.145.238.65	AS8075 Microsoft Corporation	`0.28ms` from Amsterdam, NL
51.145.231.63	AS8075 Microsoft Corporation	`0.29ms` from Amsterdam, NL
51.145.199.148	AS8075 Microsoft Corporation	`0.27ms` from Amsterdam, NL
51.145.139.50	AS8075 Microsoft Corporation	`0.25ms` from Amsterdam, NL
51.145.158.133	AS8075 Microsoft Corporation	`0.21ms` from Amsterdam, NL
51.145.122.117	AS8075 Microsoft Corporation	`0.19ms` from London, GB
51.145.41.59	AS8075 Microsoft Corporation	`0.19ms` from London, GB
51.145.82.188	AS8075 Microsoft Corporation	`0.20ms` from London, GB
51.145.150.55	AS8075 Microsoft Corporation	`0.25ms` from Amsterdam, NL
51.145.171.156	AS8075 Microsoft Corporation	`0.20ms` from Amsterdam, NL
51.145.136.248	AS8075 Microsoft Corporation	`0.25ms` from Amsterdam, NL
51.145.187.42	AS8075 Microsoft Corporation	`0.24ms` from Amsterdam, NL
51.145.159.58	AS8075 Microsoft Corporation	`0.22ms` from Amsterdam, NL
51.145.153.116	AS8075 Microsoft Corporation	`0.23ms` from Amsterdam, NL
51.145.191.161	AS8075 Microsoft Corporation	`0.23ms` from Amsterdam, NL
51.145.86.50	AS8075 Microsoft Corporation	`0.22ms` from London, GB
51.145.81.253	AS8075 Microsoft Corporation	`0.24ms` from London, GB
51.145.74.116	AS8075 Microsoft Corporation	`0.17ms` from London, GB
51.145.97.138	AS8075 Microsoft Corporation	`0.23ms` from London, GB
51.145.170.189	AS8075 Microsoft Corporation	`0.21ms` from Amsterdam, NL
51.145.245.255	AS8075 Microsoft Corporation	`0.21ms` from Amsterdam, NL
51.145.45.183	AS8075 Microsoft Corporation	`0.21ms` 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
73.236.124.207	AS7922 Comcast Cable Communications, LLC	`11.32ms` from Ashburn, US
101.20.217.127	AS4837 CHINA UNICOM China169 Backbone	`4.85ms` from Beijing, CN
70.129.62.79	AS7018 AT&T Enterprises, LLC	`7.94ms` from Chicago, US
84.137.236.223	AS3320 Deutsche Telekom AG	`6.94ms` from Duesseldorf, DE
222.186.131.31	AS4134 CHINANET-BACKBONE	`4.17ms` from Huai'an, CN
90.193.223.239	AS5607 Sky UK Limited	`3.49ms` from London, GB
193.148.246.223	AS16373 MOEVE SA	`2.76ms` from Madrid, ES
115.36.179.255	AS18126 Chubu Telecommunications Company, Inc.	`6.45ms` from Osaka, JP
90.25.67.223	AS3215 Orange S.A.	`6.13ms` from Paris, FR
52.183.222.63	AS8075 Microsoft Corporation	`0.19ms` from San Antonio, US
190.185.117.63	AS27932 Redes y Telecomunicaciones	`0.78ms` from San Pedro Sula, HN
188.176.94.207	AS3292 TDC Holding A/S	`3.90ms` from Skanderborg, DK
204.216.145.255	AS31898 Oracle Corporation	`0.16ms` from Vinhedo, BR
222.140.71.47	AS4837 CHINA UNICOM China169 Backbone	`3.88ms` from Zhengzhou, CN
23.223.135.159	AS16625 Akamai Technologies, Inc.	`0.53ms` from Atlanta, US
69.51.97.143	AS21947 Blackfoot Telephone Cooperative, Inc.	`13.11ms` from Boise, US
67.176.185.47	AS7922 Comcast Cable Communications, LLC	`8.03ms` from Chicago, US
34.153.50.63	AS396982 Google LLC	`0.13ms` from Council Bluffs, US
34.174.64.223	AS396982 Google LLC	`0.14ms` from Dallas, US
107.5.216.127	AS7922 Comcast Cable Communications, LLC	`6.87ms` from Flint, US
14.172.7.207	AS45899 VNPT Corp	`2.46ms` from Ho Chi Minh City, VN
176.234.116.79	AS34984 Superonline Iletisim Hizmetleri A.S.	`8.71ms` from Istanbul, TR
23.8.253.191	AS16625 Akamai Technologies, Inc.	`0.10ms` from Kolkata, IN
81.34.244.31	AS3352 TELEFONICA DE ESPANA S.A.U.	`4.25ms` from Madrid, ES
189.139.85.127	AS8151 UNINET	`1.67ms` from Mexico City, MX

Traceroute

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

traceroute -a -n -q1 -f4 51.144.23.214

traceroute to 51.144.23.214 (51.144.23.214): 64 hops max, 52 byte packets

4 [AS8075] 104.44.238.45 1.49 ms

5 [AS8075] 104.44.11.71 15.495 ms

6 [AS8075] 51.10.25.64 16.016 ms

7 [AS8075] 51.10.33.37 16.712 ms

8 [AS8075] 104.44.53.3 15.822 ms

9 [AS8075] 104.44.53.24 16.818 ms

10 *

11 *

12 *

13 *

14 [AS8075] 51.144.23.214 14.706 ms

Measurement taken from

IPinfo ProbeNet in Dublin, IE

On October 30th 2025

What are IP address ranges?

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