51.138.0.0/16

AS8075 · Microsoft Corporation

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Summary

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

WHOIS Details

inetnum:        51.138.0.0 - 51.138.255.255
netname:        cloud
country:        EU
admin-c:        DH5439-RIPE
tech-c:         MRPA3-RIPE
status:         LEGACY
mnt-by:         MICROSOFT-MAINT
created:        2025-09-05T18:13:19Z
last-modified:  2025-09-05T18:13:19Z
source:         RIPE
abuse-email:    [email protected]
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:         [email protected]
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:          51.138.0.0/16
origin:         AS8075
descr:          Microsoft
notify:         [email protected]
mnt-by:         MICROSOFT-MAINT
created:        2020-07-22T15:04:09Z
last-modified:  2020-07-22T15:04:51Z
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
51.172.0.0/15	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
51.220.0.0/15	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
51.190.0.0/15	AS5607	SKY UK Limited	131,072
51.212.0.0/15	AS16509	A100 ROW Inc	131,072
51.184.0.0/15	AS16509	A100 ROW Inc	131,072
51.174.0.0/15	AS29695	Altibox AS	131,072
51.208.0.0/15	AS16509	A100 ROW Inc	131,072
51.168.0.0/15	AS16509	A100 ROW Inc	131,072
51.224.0.0/15	AS16509	Amazon Data Services European Sovereign Cloud GmbH	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
51.252.0.0/15	AS25019	Saudi Telecom Company JSC	131,072
51.186.0.0/15	AS5607	SKY UK Limited	131,072
51.216.0.0/15	AS16509	A100 ROW Inc	131,072
51.4.0.0/15	AS8075	Microsoft Deutschland MCIO GmbH	131,072
51.180.0.0/15	AS16509	A100 ROW Inc	131,072
51.214.0.0/15	AS16509	A100 Row Inc	131,072
51.196.0.0/15	AS16509	A100 ROW Inc	131,072
51.182.0.0/15	AS5607	SKY UK Limited	131,072
51.156.0.0/15	AS16509	A100 Row Inc	131,072
51.122.0.0/15	AS16509	A100 Row Inc	131,072
51.188.0.0/15	AS16509	A100 ROW Inc	131,072
51.254.0.0/15	AS16276	OVH SAS	131,072
51.176.0.0/15	AS16509	A100 ROW Inc	131,072
51.192.0.0/15	AS16509	A100 ROW Inc	131,072
51.16.0.0/15	AS16509	A100 Row Inc	131,072
51.228.0.0/15	AS16509	A100 ROW Inc	131,072
51.139.0.0/16	AS16509	A100 ROW Inc	65,536
51.150.0.0/16	AS16509	A100 Row Inc	65,536
51.20.0.0/16	AS16509	A100 ROW Inc	65,536
51.148.0.0/16	AS13037	Zen Internet Limited	65,536
51.125.0.0/16	AS16509	A100 ROW Inc	65,536
51.131.0.0/16	AS16509	A100 ROW Inc	65,536
51.134.0.0/16	AS16509	A100 ROW Inc	65,536
51.110.0.0/16	AS16509	A100 Row Inc	65,536
51.108.0.0/16	AS16509	A100 Row Inc	65,536
51.160.0.0/16	AS16509	A100 ROW Inc	65,536
51.21.0.0/16	AS16509	A100 ROW Inc	65,536
51.91.0.0/16	AS16276	OVH SAS	65,536
51.89.0.0/16	AS16276	OVH SAS	65,536
51.83.0.0/16	AS16276	OVH SAS	65,536
51.112.0.0/16	AS16509	A100 ROW Inc	65,536
51.77.0.0/16	AS16276	OVH SAS	65,536

Hosted domains

There are 3,473 domain names hosted across 232 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
51.138.205.104	yourluxuryproperty.com	746
51.138.217.3	boiron.fr	714
51.138.206.254	etampes-emplois.com	291
51.138.42.218	pegi.info	215
51.138.57.221	renson.net	132
51.138.223.14	esprit-ri.com	109
51.138.226.234	moore-australia.com.au	106
51.138.12.91	cloud.im	99
51.138.47.191	aliaxis-survey.com	90
51.138.202.254	premium-academie.com	86
51.138.219.201	phytomer.ma	54
51.138.38.158	fjordkraft.no	53
51.138.28.206	buehnen-graz.com	50
51.138.52.8	metodistkirke.no	38
51.138.195.232	actforlegs.com.pa	36
51.138.55.51	corendon.dk	31
51.138.51.12	felderer-rhein-main.de	29
51.138.104.91	casavis.io	26
51.138.114.133	lubase.com	25
51.138.220.77	grupowebstudio.com	22

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

15,939 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
51.138.211.33	AS8075 Microsoft Corporation	`0.39ms` from Paris, FR
51.138.203.95	AS8075 Microsoft Corporation	`0.37ms` from Paris, FR
51.138.198.66	AS8075 Microsoft Corporation	`0.38ms` from Paris, FR
51.138.197.115	AS8075 Microsoft Corporation	`0.38ms` from Paris, FR
51.138.220.3	AS8075 Microsoft Corporation	`0.38ms` from Paris, FR
51.138.237.210	AS8075 Microsoft Corporation	`0.15ms` from Dublin, IE
51.138.202.59	AS8075 Microsoft Corporation	`0.37ms` from Paris, FR
51.138.222.129	AS8075 Microsoft Corporation	`0.37ms` from Paris, FR
51.138.227.114	AS8075 Microsoft Corporation	`0.14ms` from Dublin, IE
51.138.238.66	AS8075 Microsoft Corporation	`0.16ms` from Dublin, IE
51.138.201.163	AS8075 Microsoft Corporation	`0.34ms` from Paris, FR
51.138.235.106	AS8075 Microsoft Corporation	`0.17ms` from Dublin, IE
51.138.215.120	AS8075 Microsoft Corporation	`0.37ms` from Paris, FR
51.138.214.14	AS8075 Microsoft Corporation	`0.38ms` from Paris, FR
51.138.194.5	AS8075 Microsoft Corporation	`0.35ms` from Paris, FR
51.138.221.87	AS8075 Microsoft Corporation	`0.39ms` from Paris, FR
51.138.219.17	AS8075 Microsoft Corporation	`0.38ms` from Paris, FR
51.138.232.210	AS8075 Microsoft Corporation	`0.14ms` from Dublin, IE
51.138.224.132	AS8075 Microsoft Corporation	`0.15ms` from Dublin, IE
51.138.210.202	AS8075 Microsoft Corporation	`0.36ms` from Paris, FR
51.138.200.47	AS8075 Microsoft Corporation	`0.37ms` from Paris, FR
51.138.209.244	AS8075 Microsoft Corporation	`0.42ms` from Paris, FR
51.138.236.85	AS8075 Microsoft Corporation	`0.15ms` from Dublin, IE
51.138.199.8	AS8075 Microsoft Corporation	`0.38ms` from Paris, FR
51.138.230.227	AS8075 Microsoft Corporation	`0.16ms` from Dublin, IE

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
209.6.119.176	AS6079 RCN	`3.85ms` from Boston, US
104.154.191.96	AS396982 Google LLC	`0.13ms` from Council Bluffs, US
67.22.143.128	AS13767 DataBank Holdings, Ltd.	`1.48ms` from Dallas, US
189.187.128.176	AS8151 UNINET	`5.74ms` from Guadalajara, MX
187.213.91.144	AS8151 UNINET	`0.95ms` from Guadalajara, MX
202.190.48.240	AS9930 TTNET-MY	`1.43ms` from Kuala Lumpur, MY
131.94.220.0	AS3681 Florida International University	`1.31ms` from Miami, US
89.85.114.32	AS5410 Bouygues Telecom SA	`0.93ms` from Paris, FR
81.75.9.0	AS3269 Telecom Italia S.p.A.	`6.52ms` from Rome, IT
87.30.188.0	AS3269 Telecom Italia S.p.A.	`1.09ms` from Rome, IT
1.11.93.80	AS45996 DAOU TECHNOLOGY	`1.65ms` from Seoul, KR
202.169.112.112	AS38195 Superloop	`1.82ms` from Sydney, AU
45.76.220.224	AS20473 The Constant Company, LLC	`0.16ms` from Tokyo, JP
79.96.158.32	AS12824 home.pl S.A.	`0.88ms` from Warsaw, PL
35.71.64.0	AS16509 Amazon.com, Inc.	`0.46ms` from Boardman, US
175.149.134.32	AS4837 CHINA UNICOM China169 Backbone	`9.13ms` from Liaoyang, CN
113.230.12.240	AS4837 CHINA UNICOM China169 Backbone	`6.32ms` from Liaoyang, CN
37.192.47.64	AS31200 Novotelecom Ltd	`1.64ms` from Novosibirsk, RU
37.65.215.128	AS15557 Societe Francaise Du Radiotelephone - SFR SA	`11.58ms` from Paris, FR
99.6.134.96	AS7018 AT&T Enterprises, LLC	`3.77ms` from San Jose, US
49.72.116.128	AS140292 CHINATELECOM Jiangsu province Suzhou 5G network	`12.40ms` from Shanghai, CN
129.151.215.160	AS31898 Oracle Corporation	`0.15ms` from Stockholm, SE
126.36.52.176	AS17676 SoftBank Corp.	`4.73ms` from Tokyo, JP
133.201.37.64	AS2518 BIGLOBE Inc.	`4.23ms` from Tokyo, JP
72.39.142.192	AS7992 Cogeco Connexion Inc.	`10.48ms` from Toronto, CA

Traceroute

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

traceroute -a -n -q1 51.138.55.118

traceroute to 51.138.55.118 (51.138.55.118): 64 hops max, 52 byte packets

1 [AS63023] 69.50.92.1 3.682 ms

2 [AS3257] 207.162.204.121 0.157 ms

3 [AS3257] 89.149.130.10 0.619 ms

4 [AS8075] 51.138.55.118 120.642 ms

Measurement taken from

IPinfo ProbeNet in Denver, US

On December 6th 2025

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