51.103.0.0/16

AS8075 · Microsoft Corporation

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Summary

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

WHOIS Details

inetnum:        51.103.0.0 - 51.103.255.255
netname:        cloud
country:        EU
admin-c:        DH5439-RIPE
tech-c:         MRPA3-RIPE
status:         LEGACY
mnt-by:         MICROSOFT-MAINT
created:        2025-09-05T18:13:18Z
last-modified:  2025-09-05T18:13:18Z
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:          51.103.0.0/16
origin:         AS8075
descr:          Microsoft
notify:         radb@microsoft.com
mnt-by:         MICROSOFT-MAINT
created:        2020-07-20T21:01:42Z
last-modified:  2020-07-20T21:01:42Z
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 are 11,930 domain names hosted across 522 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
51.103.45.117	souvenirs-captures.com	9321
51.103.129.179	fer-valais-avs.ch	145
51.103.133.75	haltenspatower.ch	137
51.103.19.211	maformation.fr	116
51.103.19.220	yumens-sms.fr	110
51.103.132.64	alphakadermarkt.ch	96
51.103.165.248	swissfoxy.com	95
51.103.54.68	comptalia.com	90
51.103.100.99	fvqhmbl.sbs	85
51.103.225.47	fromagesdesuisse.com	61
51.103.89.23	datifpc.com.ee	48
51.103.209.124	huusschnapps.ch	43
51.103.39.58	labelleadresse.com	40
51.103.247.113	pylonis.ch	37
51.103.116.172	guiapracticadelsida.org	35
51.103.24.238	e-crystal.ro	34
51.103.132.157	helsana.ch	34
51.103.165.2	domaintroll.se	34
51.103.21.152	cloud-bleu.site	33
51.103.59.247	afibmatters.org	30

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

8,080 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
51.103.154.255	AS8075 Microsoft Corporation	`0.20ms` from Kloten, CH
51.103.116.125	AS8075 Microsoft Corporation	`0.18ms` from Paris, FR
51.103.121.228	AS8075 Microsoft Corporation	`0.18ms` from Paris, FR
51.103.55.229	AS8075 Microsoft Corporation	`0.21ms` from Paris, FR
51.103.6.201	AS8075 Microsoft Corporation	`0.17ms` from Paris, FR
51.103.1.217	AS8075 Microsoft Corporation	`0.18ms` from Paris, FR
51.103.38.195	AS8075 Microsoft Corporation	`0.17ms` from Paris, FR
51.103.155.234	AS8075 Microsoft Corporation	`0.20ms` from Kloten, CH
51.103.86.77	AS8075 Microsoft Corporation	`0.22ms` from Paris, FR
51.103.47.234	AS8075 Microsoft Corporation	`0.18ms` from Paris, FR
51.103.64.227	AS8075 Microsoft Corporation	`0.17ms` from Paris, FR
51.103.109.196	AS8075 Microsoft Corporation	`0.18ms` from Paris, FR
51.103.78.24	AS8075 Microsoft Corporation	`0.17ms` from Paris, FR
51.103.67.233	AS8075 Microsoft Corporation	`0.18ms` from Paris, FR
51.103.79.234	AS8075 Microsoft Corporation	`0.19ms` from Paris, FR
51.103.19.192	AS8075 Microsoft Corporation	`0.17ms` from Paris, FR
51.103.70.101	AS8075 Microsoft Corporation	`0.16ms` from Paris, FR
51.103.156.233	AS8075 Microsoft Corporation	`0.18ms` from Kloten, CH
51.103.30.19	AS8075 Microsoft Corporation	`0.19ms` from Paris, FR
51.103.60.247	AS8075 Microsoft Corporation	`0.18ms` from Paris, FR
51.103.106.29	AS8075 Microsoft Corporation	`0.18ms` from Paris, FR
51.103.80.187	AS8075 Microsoft Corporation	`0.18ms` from Paris, FR
51.103.56.197	AS8075 Microsoft Corporation	`0.17ms` from Paris, FR
51.103.49.190	AS8075 Microsoft Corporation	`0.19ms` from Paris, FR
51.103.29.67	AS8075 Microsoft Corporation	`0.20ms` from Paris, FR

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
93.128.33.96	AS6805 Telefonica Germany GmbH & Co.OHG	`2.68ms` from Berlin, DE
35.195.141.64	AS396982 Google LLC	`0.14ms` from Brussels, BE
34.45.14.192	AS396982 Google LLC	`0.11ms` from Council Bluffs, US
166.195.159.160	AS20057 AT&T Enterprises, LLC	`19.65ms` from Dallas, US
108.130.153.64	AS16509 Amazon.com, Inc.	`0.58ms` from Dublin, IE
72.144.44.240	AS8075 Microsoft Corporation	`0.18ms` from Frankfurt am Main, DE
36.69.220.160	AS7713 PT Telekomunikasi Indonesia	`1.43ms` from Jakarta, ID
86.147.132.80	AS2856 British Telecommunications PLC	`1.13ms` from London, GB
90.171.242.192	AS12479 Orange Espagne SA	`2.36ms` from Madrid, ES
13.232.0.80	AS16509 Amazon.com, Inc.	`0.13ms` from Mumbai, IN
74.77.148.96	AS11351 Charter Communications Inc	`19.13ms` from New York City, US
83.159.35.128	AS12322 Free SAS	`1.29ms` from Paris, FR
88.170.8.64	AS12322 Free SAS	`8.12ms` from Paris, FR
79.186.150.80	AS5617 Orange Polska Spolka Akcyjna	`4.78ms` from Poznan, PL
151.26.135.128	AS1267 WIND TRE S.P.A.	`7.99ms` from Rome, IT
71.251.220.48	AS701 Verizon Business	`2.19ms` from Secaucus, US
149.117.216.48	AS3462 Data Communication Business Group	`2.10ms` from Taipei, TW
133.201.217.224	AS2518 BIGLOBE Inc.	`5.57ms` from Tokyo, JP
157.105.54.224	AS2907 Research Organization of Information and Systems, National Institute of Informatics	`1.68ms` from Tokyo, JP
20.48.227.80	AS8075 Microsoft Corporation	`0.48ms` from Toronto, CA
195.85.119.96	AS397976 Central Access, Inc.	`7.28ms` from Atlanta, US
87.142.134.32	AS3320 Deutsche Telekom AG	`7.26ms` from Frankfurt am Main, DE
217.227.178.128	AS3320 Deutsche Telekom AG	`8.19ms` from Frankfurt am Main, DE
188.148.87.32	AS1257 Tele2 Sverige AB	`11.12ms` from Goeteborg, SE
213.113.217.112	AS8434 Telenor Sverige AB	`1.08ms` from Goeteborg, SE

Traceroute

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

traceroute -a -n -q1 -f4 51.103.254.7

traceroute to 51.103.254.7 (51.103.254.7): 64 hops max, 52 byte packets

4 [AS201011] 81.95.9.68 0.337 ms

5 [] 91.206.52.152 0.363 ms

6 [AS8075] 51.10.50.4 1.349 ms

7 *

8 *

9 *

10 *

11 [AS8075] 51.103.254.7 0.507 ms

Measurement taken from

IPinfo ProbeNet in Zuerich, CH

On December 28th 2025

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