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

Need more data or want to access it via API or data downloads? Sign up to get free access

Sign up for free ›

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:    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:          51.138.0.0/16
origin:         AS8075
descr:          Microsoft
notify:         radb@microsoft.com
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 3,566 domain names hosted across 235 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 745
51.138.217.3 boiron.fr 714
51.138.206.254 figeac-emplois.com 291
51.138.42.218 pegi.info 217
51.138.47.191 ldcsurvey.com 147
51.138.57.221 renson.net 131
51.138.226.234 moore.af 110
51.138.223.14 idracfclyon.com 108
51.138.12.91 cloud.im 99
51.138.202.254 monitoracademy.com 88
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 zentralschmierung.eu 48
51.138.52.8 metodistkirkensspeiderkorps.no 38
51.138.195.232 partneruzdravlju.rs 36
51.138.55.51 corendon.dk 32
51.138.51.12 hth-giessen.com 29
51.138.104.91 casaviz.at 26
51.138.220.77 onpo.eu 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

15,842 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
51.138.50.201 AS8075 Microsoft Corporation 0.20ms from Amsterdam, NL
51.138.176.235 AS8075 Microsoft Corporation 0.14ms from Dublin, IE
51.138.232.225 AS8075 Microsoft Corporation 0.13ms from Dublin, IE
51.138.186.103 AS8075 Microsoft Corporation 0.40ms from Dublin, IE
51.138.214.35 AS8075 Microsoft Corporation 0.20ms from Paris, FR
51.138.107.35 AS8075 Microsoft Corporation 0.20ms from Amsterdam, NL
51.138.70.13 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.138.14.80 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.138.91.7 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.138.40.214 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.138.108.25 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.138.12.71 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.138.238.60 AS8075 Microsoft Corporation 0.15ms from Dublin, IE
51.138.1.60 AS8075 Microsoft Corporation 0.20ms from Amsterdam, NL
51.138.66.188 AS8075 Microsoft Corporation 0.20ms from Amsterdam, NL
51.138.48.161 AS8075 Microsoft Corporation 0.22ms from Amsterdam, NL
51.138.97.254 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.138.25.190 AS8075 Microsoft Corporation 0.19ms from Amsterdam, NL
51.138.188.217 AS8075 Microsoft Corporation 0.73ms from Dublin, IE
51.138.158.12 AS8075 Microsoft Corporation 0.59ms from Marseille, FR
51.138.153.216 AS8075 Microsoft Corporation 0.49ms from Marseille, FR
51.138.119.66 AS8075 Microsoft Corporation 0.26ms from Amsterdam, NL
51.138.100.92 AS8075 Microsoft Corporation 0.20ms from Amsterdam, NL
51.138.19.175 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.138.65.18 AS8075 Microsoft Corporation 0.22ms from Amsterdam, NL

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
97.166.90.32 AS6167 Verizon Business 14.54ms from Atlanta, US
217.12.194.32 AS204957 GREEN FLOID LLC 0.10ms from Chicago, US
177.66.75.192 AS52845 NOVA FIBRA TELECOM S.A. 12.07ms from Curitiba, BR
119.226.47.128 AS9583 Sify Limited 0.69ms from Delhi, IN
79.244.82.160 AS3320 Deutsche Telekom AG 4.70ms from Duesseldorf, DE
14.228.34.64 AS45899 VNPT Corp 6.18ms from Hanoi, VN
20.68.200.32 AS8075 Microsoft Corporation 0.19ms from London, GB
47.207.26.240 AS5650 Frontier Communications of America, Inc. 5.59ms from Miami, US
93.196.61.240 AS3320 Deutsche Telekom AG 3.59ms from Nuernberg, DE
176.146.170.208 AS5410 Bouygues Telecom SA 5.65ms from Paris, FR
34.235.61.80 AS14618 Amazon.com, Inc. 0.22ms from Reston, US
79.15.191.0 AS3269 Telecom Italia S.p.A. 1.15ms from Rome, IT
222.101.237.240 AS4766 Korea Telecom 1.66ms from Seoul, KR
159.117.66.48 AS18046 DongFong Technology Co. Ltd. 5.16ms from Taipei, TW
31.20.185.224 AS50266 Odido Netherlands B.V. 6.08ms from Amsterdam, NL
181.126.228.0 AS23201 Telecel S.A. 8.14ms from Asuncion, PY
5.38.217.0 AS5483 Magyar Telekom Plc. 1.04ms from Budapest, HU
71.194.178.112 AS7922 Comcast Cable Communications, LLC 7.03ms from Chicago, US
103.250.252.240 AS146835 Nanchang index technology development Co.,LTD 0.66ms from Haikou, CN
216.167.73.144 AS2914 NTT America, Inc. 0.65ms from Los Angeles, US
188.255.92.160 AS42610 PJSC Rostelecom 1.00ms from Moscow, RU
58.191.101.240 AS17511 OPTAGE Inc. 3.27ms from Osaka, JP
133.238.174.160 AS2497 Internet Initiative Japan Inc. 5.57ms from Osaka, JP
2.11.221.96 AS3215 Orange S.A. 3.94ms from Paris, FR
101.35.232.32 AS45090 Shenzhen Tencent Computer Systems Company Limited 1.33ms from Shanghai, CN

Traceroute

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

$
traceroute -a -n -q1 -f6 -m13 51.138.159.189
traceroute to 51.138.159.189 (51.138.159.189): 13 hops max, 52 byte packets
6 [AS174] 66.28.4.142 1.374 ms
7 [AS174] 154.54.164.233 2.139 ms
8 [AS174] 154.54.170.170 3.219 ms
9 [AS174] 38.32.158.162 15.398 ms
10 [AS8075] 51.10.38.11 16.743 ms
11 *
12 *
13 *
Measurement taken from IPinfo ProbeNet in Buffalo, US
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.

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales
IPinfo for all your IP geolocation needs

Our IP tools

Explore all tools
What is my IP

What is my IP

Test our data accuracy by viewing insights from your IP address.

See your IP address
Map IPs

Map IPs

Paste up to 500,000 IPs to see where they're located on a map.

Try Map IPs
Summarize IPs

Summarize IPs

Use our data visualization tool to create a visual overview of multiple IPs.

Try Summarize IPs