1. All IP Ranges
  2. 51.0.0.0/8
  3. 51.138.0.0/16
  4. AS8075  | 51.138.0.0/16

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
51.176.0.0/15 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 3,521 domain names hosted across 234 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 744
51.138.217.3 boiron.fr 714
51.138.206.254 brioude-emplois.com 291
51.138.42.218 pegi.info 215
51.138.57.221 renson.net 132
51.138.47.191 falajirau.com 110
51.138.223.14 ifagauxerre.biz 108
51.138.226.234 moore-australia.com.au 107
51.138.12.91 cloud.im 99
51.138.202.254 proman-academie.com 87
51.138.38.158 fjordkraft.no 53
51.138.219.201 phytomer.ma 52
51.138.28.206 buehnen-graz.com 50
51.138.114.133 lincolnindia.com 48
51.138.52.8 metodistkirken.no 38
51.138.195.232 myhealthpartnerkh.com 36
51.138.55.51 corendon.dk 31
51.138.51.12 felderer.com 29
51.138.104.91 casaviz.net 26
51.138.220.77 joanpedragosa.es 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

15,961 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
51.138.108.112 AS8075 Microsoft Corporation 0.23ms from Amsterdam, NL
51.138.49.252 AS8075 Microsoft Corporation 0.23ms from Amsterdam, NL
51.138.105.38 AS8075 Microsoft Corporation 0.22ms from Amsterdam, NL
51.138.57.55 AS8075 Microsoft Corporation 0.22ms from Amsterdam, NL
51.138.59.25 AS8075 Microsoft Corporation 0.23ms from Amsterdam, NL
51.138.96.51 AS8075 Microsoft Corporation 0.22ms from Amsterdam, NL
51.138.89.223 AS8075 Microsoft Corporation 0.22ms from Amsterdam, NL
51.138.226.222 AS8075 Microsoft Corporation 0.14ms from Dublin, IE
51.138.154.133 AS8075 Microsoft Corporation 0.47ms from Marseille, FR
51.138.204.53 AS8075 Microsoft Corporation 0.41ms from Paris, FR
51.138.193.226 AS8075 Microsoft Corporation 0.18ms from Paris, FR
51.138.199.227 AS8075 Microsoft Corporation 0.42ms from Paris, FR
51.138.124.65 AS8075 Microsoft Corporation 0.24ms from Amsterdam, NL
51.138.92.55 AS8075 Microsoft Corporation 0.24ms from Amsterdam, NL
51.138.63.75 AS8075 Microsoft Corporation 0.24ms from Amsterdam, NL
51.138.19.226 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.138.97.35 AS8075 Microsoft Corporation 0.22ms from Amsterdam, NL
51.138.41.244 AS8075 Microsoft Corporation 0.23ms from Amsterdam, NL
51.138.42.155 AS8075 Microsoft Corporation 0.22ms from Amsterdam, NL
51.138.4.18 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.138.76.219 AS8075 Microsoft Corporation 0.26ms from Amsterdam, NL
51.138.22.110 AS8075 Microsoft Corporation 0.23ms from Amsterdam, NL
51.138.38.158 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.138.7.37 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.138.228.174 AS8075 Microsoft Corporation 0.14ms 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
50.41.16.128 AS5650 Frontier Communications of America, Inc. 9.65ms from Ashburn, US
94.44.78.144 AS21334 One Hungary Ltd. 14.80ms from Budapest, HU
88.217.22.48 AS8767 M-net Telekommunikations GmbH 7.12ms from Ljubljana, SI
94.238.102.16 AS5410 Bouygues Telecom SA 5.62ms from Marseille, FR
73.164.223.240 AS7922 Comcast Cable Communications, LLC 6.38ms from Portland, US
114.215.113.208 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 0.42ms from Qingdao, CN
39.121.198.32 AS9318 SK Broadband Co Ltd 5.74ms from Seoul, KR
58.126.62.64 AS9318 SK Broadband Co Ltd 7.61ms from Seoul, KR
18.140.222.240 AS16509 Amazon.com, Inc. 0.11ms from Singapore, SG
15.204.134.112 AS16276 OVH SAS 1.32ms from Ashburn, US
58.136.197.144 AS133481 AIS Fibre 2.58ms from Bangkok, TH
73.142.230.240 AS7922 Comcast Cable Communications, LLC 7.04ms from Boston, US
154.71.30.0 AS30999 EMTEL LIMITED 0.52ms from Ebene, MU
68.48.217.32 AS7922 Comcast Cable Communications, LLC 8.54ms from Flint, US
88.79.154.224 AS3209 Vodafone GmbH 0.94ms from Frankfurt am Main, DE
94.15.2.144 AS5607 Sky UK Limited 2.17ms from London, GB
85.54.76.240 AS12479 Orange Espagne SA 1.54ms from Madrid, ES
24.191.83.192 AS6128 Cablevision Systems Corp. 10.60ms from New York City, US
64.45.238.128 AS2379 CenturyLink Communications, LLC 0.61ms from Orlando, US
204.199.149.128 AS3549 Level 3 Parent, LLC 0.37ms from Quito, EC
4.151.184.96 AS8075 Microsoft Corporation 0.22ms from San Antonio, US
193.58.188.96 AS10557 Connect Northwest Internet Services, LLC 0.23ms from Seattle, US
36.90.54.160 AS7713 PT Telekomunikasi Indonesia 2.60ms from Surabaya, ID
43.243.25.64 AS12975 PALTEL Autonomous System 8.41ms from Tel Aviv, IL
83.131.226.0 AS5391 Hrvatski Telekom d.d. 7.00ms from Zagreb, HR

Traceroute

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

$
traceroute -a -n -q1 -f6 51.138.126.147
traceroute to 51.138.126.147 (51.138.126.147): 64 hops max, 52 byte packets
6 [AS8075] 51.138.126.147 197.358 ms
Measurement taken from IPinfo ProbeNet in Novo Hamburgo, BR
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.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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