51.12.0.0/15

AS8075 · Microsoft Corporation

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Summary

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

WHOIS Details

inetnum:        51.12.0.0 - 51.12.255.255
netname:        cloud
country:        EU
admin-c:        DH5439-RIPE
tech-c:         MRPA3-RIPE
status:         LEGACY
mnt-by:         MICROSOFT-MAINT
created:        2025-09-05T18:13:17Z
last-modified:  2025-09-05T18:13:17Z
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:          51.12.0.0/15
origin:         AS8075
descr:          Microsoft
notify:         radb@microsoft.com
mnt-by:         MICROSOFT-MAINT
created:        2020-07-22T15:00:57Z
last-modified:  2020-07-22T15:00:57Z
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 6,204 domain names hosted across 458 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
51.12.31.0	audistockholm.se	561
51.12.80.48	fulgentin.se	419
51.13.160.245	aezcvj.sbs	376
51.13.104.222	smartliving-norway.com	355
51.12.31.3	aktiespararna.se	248
51.12.31.1	lo.se	223
51.12.31.2	hindenburg.com	221
51.13.72.20	filmfondnord.no	209
51.13.16.58	arran.no	203
51.12.31.8	vaccindirekt.se	183
51.12.31.13	parfym.se	155
51.13.107.20	bim2share.no	143
51.12.31.5	qing.se	137
51.12.31.7	tabussen.nu	134
51.13.36.62	fiksuvesi.fi	132
51.13.74.50	modum-bad.no	129
51.12.48.106	wartburg.se	128
51.12.80.214	frederiksberg-shop.dk	109
51.13.105.46	bbqshop.no	105
51.12.31.10	nrgrd.com	101

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

7,630 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
51.12.196.202	AS8075 Microsoft Corporation	`2.48ms` from Copenhagen, DK
51.12.199.21	AS8075 Microsoft Corporation	`2.48ms` from Copenhagen, DK
51.12.52.77	AS8075 Microsoft Corporation	`0.46ms` from Gaevle, SE
51.12.29.68	AS8075 Microsoft Corporation	`0.19ms` from Gaevle, SE
51.12.55.148	AS8075 Microsoft Corporation	`0.46ms` from Gaevle, SE
51.12.205.29	AS8075 Microsoft Corporation	`2.88ms` from Copenhagen, DK
51.12.9.9	AS8075 Microsoft Corporation	`2.57ms` from Copenhagen, DK
51.12.209.187	AS8075 Microsoft Corporation	`0.50ms` from Gaevle, SE
51.12.85.173	AS8075 Microsoft Corporation	`0.18ms` from Gaevle, SE
51.12.99.115	AS8075 Microsoft Corporation	`0.48ms` from Gaevle, SE
51.12.22.172	AS8075 Microsoft Corporation	`2.45ms` from Copenhagen, DK
51.12.221.146	AS8075 Microsoft Corporation	`0.54ms` from Gaevle, SE
51.12.44.145	AS8075 Microsoft Corporation	`0.21ms` from Gaevle, SE
51.12.30.72	AS8075 Microsoft Corporation	`0.18ms` from Gaevle, SE
51.12.48.7	AS8075 Microsoft Corporation	`0.65ms` from Gaevle, SE
51.12.1.69	AS8075 Microsoft Corporation	`2.46ms` from Copenhagen, DK
51.12.132.110	AS8075 Microsoft Corporation	`0.21ms` from Gaevle, SE
51.12.149.201	AS8075 Microsoft Corporation	`0.19ms` from Gaevle, SE
51.12.43.0	AS8075 Microsoft Corporation	`0.20ms` from Gaevle, SE
51.12.72.128	AS8075 Microsoft Corporation	`0.21ms` from Gaevle, SE
51.12.93.188	AS8075 Microsoft Corporation	`0.19ms` from Gaevle, SE
51.12.130.21	AS8075 Microsoft Corporation	`0.17ms` from Gaevle, SE
51.12.150.77	AS8075 Microsoft Corporation	`0.20ms` from Gaevle, SE
51.12.213.52	AS8075 Microsoft Corporation	`0.76ms` from Gaevle, SE
51.12.100.6	AS8075 Microsoft Corporation	`0.47ms` from Gaevle, SE

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
61.161.89.207	AS4134 CHINANET-BACKBONE	`0.97ms` from Chongqing, CN
81.149.176.47	AS2856 British Telecommunications PLC	`2.88ms` from London, GB
151.48.191.223	AS1267 WIND TRE S.P.A.	`2.77ms` from Milan, IT
3.94.243.223	AS14618 Amazon.com, Inc.	`0.18ms` from Reston, US
73.41.237.47	AS7922 Comcast Cable Communications, LLC	`11.06ms` from Santa Clara, US
47.164.185.47	AS5650 Frontier Communications of America, Inc.	`5.11ms` from Secaucus, US
15.165.245.63	AS16509 Amazon.com, Inc.	`0.18ms` from Seoul, KR
118.127.233.255	AS17839 LG HelloVision Corp.	`1.83ms` from Seoul, KR
14.34.137.143	AS4766 Korea Telecom	`2.19ms` from Seoul, KR
183.96.165.239	AS4766 Korea Telecom	`1.31ms` from Seoul, KR
111.186.14.207	AS4538 China Education and Research Network Center	`2.52ms` from Shanghai, CN
139.217.195.207	AS58593 Shanghai Blue Cloud Technology Co.,Ltd	`3.59ms` from Shanghai, CN
52.77.89.175	AS16509 Amazon.com, Inc.	`0.14ms` from Singapore, SG
212.233.174.239	AS29582 Optisprint OOD	`3.64ms` from Sofia, BG
176.228.86.223	AS12400 Partner Communications Ltd.	`1.27ms` from Tel Aviv, IL
37.133.4.159	AS12479 Orange Espagne SA	`5.73ms` from Zaragoza, ES
3.150.165.175	AS16509 Amazon.com, Inc.	`0.20ms` from Columbus, US
50.24.42.47	AS19108 Optimum	`7.13ms` from Dallas, US
136.158.71.223	AS17639 Converge ICT Solutions Inc.	`3.19ms` from Manila, PH
5.48.49.111	AS5410 Bouygues Telecom SA	`4.45ms` from Marseille, FR
156.229.3.255	AS63139 BEDGE CO LIMITED	`0.62ms` from Riyadh, SA
14.46.151.127	AS4766 Korea Telecom	`4.95ms` from Seoul, KR
177.95.200.111	AS27699 TELEFÔNICA BRASIL S.A	`8.54ms` from São Paulo, BR
120.0.150.143	AS4837 CHINA UNICOM China169 Backbone	`11.46ms` from Beijing, CN
176.101.176.255	AS57566 Wircom s.r.o.	`2.32ms` from Bratislava, SK

Traceroute

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

traceroute -a -n -q1 -f4 -m9 51.12.66.225

traceroute to 51.12.66.225 (51.12.66.225): 9 hops max, 52 byte packets

4 [AS28917] 80.77.167.173 64.433 ms

5 [] 80.249.209.21 40.036 ms

6 [AS8075] 104.44.52.36 38.458 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Moscow, RU

On October 30th 2025

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