1. All IP Ranges
  2. 51.0.0.0/8
  3. 51.103.0.0/16
  4. AS8075  | 51.103.0.0/16

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:    [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:          51.103.0.0/16
origin:         AS8075
descr:          Microsoft
notify:         [email protected]
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 11,797 domain names hosted across 518 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 9244
51.103.129.179 fer-valais-avs.ch 147
51.103.19.211 maformation.fr 116
51.103.19.220 tonicradio-sms.com 110
51.103.132.64 mydreamjob.ch 96
51.103.165.248 alfagolftours.ch 91
51.103.54.68 comptalia.com 89
51.103.100.99 sibxkoe.sbs 85
51.103.133.75 haltenspatower.ch 73
51.103.225.47 formatgedesuissa.com 61
51.103.89.23 datifpc.com.ee 48
51.103.209.124 gnusshuus.ch 43
51.103.39.58 lesbelleseconomies.com 40
51.103.247.113 cascobici.ch 37
51.103.116.172 noteloinventas.com 35
51.103.165.2 spcq1.pl 34
51.103.24.238 rocontainere.ro 34
51.103.132.157 helsana.ch 34
51.103.21.152 cloudbleu.net 32
51.103.88.187 v1v12rb2br1v12.net 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

7,921 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
51.103.142.207 AS8075 Microsoft Corporation 0.23ms from Kloten, CH
51.103.44.183 AS8075 Microsoft Corporation 0.59ms from Paris, FR
51.103.81.248 AS8075 Microsoft Corporation 0.20ms from Paris, FR
51.103.143.1 AS8075 Microsoft Corporation 0.20ms from Kloten, CH
51.103.36.127 AS8075 Microsoft Corporation 0.19ms from Paris, FR
51.103.101.184 AS8075 Microsoft Corporation 0.22ms from Paris, FR
51.103.26.48 AS8075 Microsoft Corporation 0.18ms from Paris, FR
51.103.58.245 AS8075 Microsoft Corporation 0.20ms from Paris, FR
51.103.88.89 AS8075 Microsoft Corporation 0.21ms from Paris, FR
51.103.41.201 AS8075 Microsoft Corporation 0.21ms from Paris, FR
51.103.67.230 AS8075 Microsoft Corporation 0.19ms from Paris, FR
51.103.65.201 AS8075 Microsoft Corporation 0.21ms from Paris, FR
51.103.16.250 AS8075 Microsoft Corporation 0.21ms from Paris, FR
51.103.75.5 AS8075 Microsoft Corporation 0.17ms from Paris, FR
51.103.138.149 AS8075 Microsoft Corporation 0.20ms from Kloten, CH
51.103.153.106 AS8075 Microsoft Corporation 0.17ms from Kloten, CH
51.103.79.27 AS8075 Microsoft Corporation 0.20ms from Paris, FR
51.103.109.66 AS8075 Microsoft Corporation 0.21ms from Paris, FR
51.103.62.185 AS8075 Microsoft Corporation 0.19ms from Paris, FR
51.103.149.105 AS8075 Microsoft Corporation 0.20ms from Kloten, CH
51.103.0.159 AS8075 Microsoft Corporation 0.19ms from Paris, FR
51.103.121.92 AS8075 Microsoft Corporation 0.22ms from Paris, FR
51.103.61.251 AS8075 Microsoft Corporation 0.19ms from Paris, FR
51.103.97.187 AS8075 Microsoft Corporation 0.19ms from Paris, FR
51.103.85.55 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
130.35.181.64 AS31898 Oracle Corporation 0.30ms from Ashburn, US
80.78.152.240 AS12570 O2 Czech Republic, a.s. 2.91ms from Brno, CZ
97.150.30.208 AS6167 Verizon Business 19.16ms from Dallas, US
68.49.219.224 AS7922 Comcast Cable Communications, LLC 8.85ms from Flint, US
170.33.34.128 AS45102 Alibaba (US) Technology Co., Ltd. 0.47ms from Frankfurt am Main, DE
134.94.159.208 AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. 4.72ms from Frankfurt am Main, DE
37.59.96.48 AS16276 OVH SAS 0.14ms from Gravelines, FR
223.252.210.240 AS45062 Netease-Network 3.37ms from Hangzhou, CN
39.58.217.176 AS17557 Pakistan Telecommunication Company Limited 1.33ms from Islamabad, PK
123.190.112.160 AS4837 CHINA UNICOM China169 Backbone 8.14ms from Liaoyang, CN
88.166.55.176 AS12322 Free SAS 5.40ms from Paris, FR
37.116.113.144 AS30722 Vodafone Italia S.p.A. 12.01ms from Rome, IT
71.94.21.144 AS20115 Charter Communications LLC 9.74ms from San Jose, US
59.9.205.192 AS4766 Korea Telecom 1.43ms from Seoul, KR
34.177.89.240 AS396982 Google LLC 0.14ms from Singapore, SG
77.55.227.16 AS15967 Nazwa.pl Sp.z.o.o. 0.71ms from Warsaw, PL
178.196.229.112 AS3303 Swisscom (Switzerland) Ltd 1.39ms from Zuerich, CH
92.66.230.112 AS1136 KPN B.V. 2.54ms from Amsterdam, NL
73.74.85.48 AS7922 Comcast Cable Communications, LLC 5.86ms from Chicago, US
177.125.74.64 AS52766 Printnet telecomunicaçoes 7.78ms from Curitiba, BR
72.41.6.176 AS16509 Amazon.com, Inc. 0.09ms from Houston, US
151.224.72.128 AS5607 Sky UK Limited 8.60ms from London, GB
154.127.210.144 AS36907 TV CABO ANGOLA LDA 3.67ms from Luanda, AO
34.110.210.176 AS396982 Google LLC 0.09ms from Santiago de Queretaro, MX
113.131.186.0 AS9697 LG HelloVision Corp. 8.20ms 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 -f3 51.103.226.42
traceroute to 51.103.226.42 (51.103.226.42): 64 hops max, 52 byte packets
3 [AS16509] 99.82.8.250 0.715 ms
4 [AS16509] 99.82.8.251 0.902 ms
5 [AS8075] 104.44.51.136 0.198 ms
6 *
7 *
8 [AS8075] 51.10.20.244 5.149 ms
9 [AS8075] 51.10.14.86 3.983 ms
10 *
11 *
12 *
13 *
14 [AS8075] 51.103.226.42 4.022 ms
Measurement taken from IPinfo ProbeNet in Milan, IT
On

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.

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