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:    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 11,818 domain names hosted across 516 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 9260
51.103.129.179 fer-valais-avs.ch 148
51.103.19.211 maformation.fr 116
51.103.19.220 venteciblee-sms.fr 110
51.103.132.64 bank-job.ch 96
51.103.165.248 foxylightpromax.com 91
51.103.54.68 comptalia.com 89
51.103.100.99 hxbniyh.sbs 85
51.103.133.75 haltenspatower.ch 73
51.103.225.47 xn--schweizerkse-pcb.at 61
51.103.89.23 datif-pc.com.ee 48
51.103.209.124 huus-schnapps.ch 43
51.103.39.58 lechatbebe.fr 41
51.103.247.113 kinder-ueberraschen.ch 37
51.103.116.172 soyinvestigacion.com 35
51.103.132.157 helsana.ch 34
51.103.24.238 alexbeagroup.ro 34
51.103.165.2 trosalokaler.se 34
51.103.154.127 cloudvault.ch 32
51.103.21.152 bleu-cloud.website 32

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

7,922 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
51.103.34.185 AS8075 Microsoft Corporation 0.20ms from Paris, FR
51.103.37.60 AS8075 Microsoft Corporation 0.25ms from Paris, FR
51.103.20.166 AS8075 Microsoft Corporation 0.19ms from Paris, FR
51.103.3.29 AS8075 Microsoft Corporation 0.21ms from Paris, FR
51.103.155.38 AS8075 Microsoft Corporation 0.19ms from Kloten, CH
51.103.132.185 AS8075 Microsoft Corporation 0.18ms from Kloten, CH
51.103.123.206 AS8075 Microsoft Corporation 0.20ms from Paris, FR
51.103.102.55 AS8075 Microsoft Corporation 0.20ms from Paris, FR
51.103.88.87 AS8075 Microsoft Corporation 0.18ms from Paris, FR
51.103.32.25 AS8075 Microsoft Corporation 0.19ms from Paris, FR
51.103.4.92 AS8075 Microsoft Corporation 0.20ms from Paris, FR
51.103.127.32 AS8075 Microsoft Corporation 0.18ms from Paris, FR
51.103.2.243 AS8075 Microsoft Corporation 0.20ms from Paris, FR
51.103.80.147 AS8075 Microsoft Corporation 0.19ms from Paris, FR
51.103.104.176 AS8075 Microsoft Corporation 0.18ms from Paris, FR
51.103.7.55 AS8075 Microsoft Corporation 0.19ms from Paris, FR
51.103.66.207 AS8075 Microsoft Corporation 0.18ms from Paris, FR
51.103.97.86 AS8075 Microsoft Corporation 0.18ms from Paris, FR
51.103.8.81 AS8075 Microsoft Corporation 0.18ms from Paris, FR
51.103.11.182 AS8075 Microsoft Corporation 0.22ms from Paris, FR
51.103.81.137 AS8075 Microsoft Corporation 0.18ms from Paris, FR
51.103.31.141 AS8075 Microsoft Corporation 0.21ms from Paris, FR
51.103.115.12 AS8075 Microsoft Corporation 0.18ms from Paris, FR
51.103.103.228 AS8075 Microsoft Corporation 0.18ms from Paris, FR
51.103.158.180 AS8075 Microsoft Corporation 0.23ms from Kloten, CH

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
95.99.18.48 AS50266 Odido Netherlands B.V. 4.90ms from Amsterdam, NL
51.81.46.32 AS16276 OVH SAS 1.22ms from Ashburn, US
46.103.141.0 AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA 1.66ms from Athens, GR
97.129.172.112 AS6167 Verizon Business 15.37ms from Atlanta, US
125.24.169.112 AS23969 TOT Public Company Limited 1.32ms from Bangkok, TH
70.74.169.192 AS6327 Shaw Communications 8.81ms from Calgary, CA
184.16.202.208 AS5650 Frontier Communications of America, Inc. 9.05ms from Chicago, US
67.66.232.0 AS7018 AT&T Enterprises, LLC 9.61ms from Dallas, US
68.49.219.224 AS7922 Comcast Cable Communications, LLC 10.64ms from Flint, US
77.105.161.112 AS215428 Mykyta Skorobohatko 6.16ms from Frankfurt am Main, DE
121.199.208.192 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 5.20ms from Hangzhou, CN
24.71.125.0 AS6327 Shaw Communications 5.36ms from Kelowna, CA
151.226.68.80 AS5607 Sky UK Limited 1.85ms from London, GB
78.32.71.64 AS8468 ENTANET International Limited 3.15ms from London, GB
88.173.60.144 AS12322 Free SAS 5.76ms from Paris, FR
27.192.158.48 AS4837 CHINA UNICOM China169 Backbone 4.46ms from Qingdao, CN
18.144.4.144 AS16509 Amazon.com, Inc. 0.11ms from San Jose, US
193.121.178.128 AS5432 Proximus NV 6.61ms from Amsterdam, NL
144.41.203.192 AS553 BelWue-Koordination 3.75ms from Frankfurt am Main, DE
188.148.87.32 AS1257 Tele2 Sverige AB 11.65ms from Goeteborg, SE
14.167.10.144 AS45899 VNPT Corp 4.83ms from Hanoi, VN
119.2.72.32 AS17450 PT Bank Central Asia, Tbk 2.44ms from Jakarta, ID
36.67.224.208 AS7713 PT Telekomunikasi Indonesia 9.99ms from Jakarta, ID
216.150.114.0 AS17049 MBO Video, LLC 5.76ms from Kansas City, US
178.192.159.176 AS3303 Swisscom (Switzerland) Ltd 0.78ms from Lausanne, CH

Traceroute

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

$
traceroute -a -n -q1 -f3 51.103.140.81
traceroute to 51.103.140.81 (51.103.140.81): 64 hops max, 52 byte packets
7 [AS6453] 80.231.80.63 11.717 ms
8 [AS8075] 104.44.230.72 1.561 ms
9 *
10 *
11 *
12 [AS8075] 51.10.14.58 14.326 ms
13 *
14 *
15 *
16 *
17 [AS8075] 51.103.140.81 14.039 ms
Measurement taken from IPinfo ProbeNet in Amsterdam, NL
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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