1. All IP Ranges
  2. 51.0.0.0/8
  3. AS8075  | 51.144.0.0/15

51.144.0.0/15

AS8075  ·  Microsoft Corporation

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Summary

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

WHOIS Details

inetnum:        51.144.0.0 - 51.144.255.255
netname:        cloud
country:        EU
admin-c:        DH5439-RIPE
tech-c:         MRPA3-RIPE
status:         LEGACY
mnt-by:         MICROSOFT-MAINT
created:        2025-09-05T18:13:20Z
last-modified:  2025-09-05T18:13:20Z
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:          51.144.0.0/15
origin:         AS8075
descr:          Microsoft
notify:         [email protected]
mnt-by:         MICROSOFT-MAINT
created:        2020-07-22T15:06:00Z
last-modified:  2020-07-22T15:06:00Z
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 8,779 domain names hosted across 1,006 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
51.145.110.210 visitisleofwight.co.uk 820
51.144.188.75 boschaftermarket.com 419
51.144.190.143 larousse.fr 345
51.144.7.192 familieretshuset.dk 265
51.144.88.178 capsugel.com 239
51.145.250.217 nets.eu 215
51.144.159.14 heidpol.nl 211
51.145.11.248 lloyds.com 208
51.144.182.8 cityandguilds.com 187
51.144.116.43 damirscorner.com 178
51.144.186.101 heydoc.pl 166
51.144.107.53 ruokavirasto.fi 142
51.144.164.215 cursosodontologia.com 141
51.145.26.96 ofertasmimosapascoa.com 132
51.145.92.67 gatherherelondon.co.uk 128
51.145.232.156 franquiciashoy.es 120
51.145.209.49 kick-protocollen.nl 111
51.144.54.180 alphatv.gr 100
51.145.144.212 jihlavskyvecernik.cz 98
51.145.38.120 ayrshirealignment.com 96

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

16,967 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
51.144.3.110 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.144.7.67 AS8075 Microsoft Corporation 0.22ms from Amsterdam, NL
51.144.5.102 AS8075 Microsoft Corporation 0.24ms from Amsterdam, NL
51.144.0.86 AS8075 Microsoft Corporation 0.22ms from Amsterdam, NL
51.144.6.23 AS8075 Microsoft Corporation 0.24ms from Amsterdam, NL
51.144.4.200 AS8075 Microsoft Corporation 0.23ms from Amsterdam, NL
51.144.1.68 AS8075 Microsoft Corporation 0.23ms from Amsterdam, NL
51.144.2.166 AS8075 Microsoft Corporation 0.23ms from Amsterdam, NL
51.145.159.28 AS8075 Microsoft Corporation 0.24ms from Amsterdam, NL
51.145.188.7 AS8075 Microsoft Corporation 0.24ms from Amsterdam, NL
51.145.138.100 AS8075 Microsoft Corporation 0.28ms from Amsterdam, NL
51.145.234.142 AS8075 Microsoft Corporation 0.29ms from Amsterdam, NL
51.145.229.219 AS8075 Microsoft Corporation 0.27ms from Amsterdam, NL
51.145.146.83 AS8075 Microsoft Corporation 0.28ms from Amsterdam, NL
51.145.67.227 AS8075 Microsoft Corporation 0.27ms from London, GB
51.145.25.123 AS8075 Microsoft Corporation 0.28ms from London, GB
51.145.190.120 AS8075 Microsoft Corporation 0.24ms from Amsterdam, NL
51.145.158.7 AS8075 Microsoft Corporation 0.22ms from Amsterdam, NL
51.145.230.182 AS8075 Microsoft Corporation 0.29ms from Amsterdam, NL
51.145.147.187 AS8075 Microsoft Corporation 0.25ms from Amsterdam, NL
51.145.29.91 AS8075 Microsoft Corporation 0.21ms from London, GB
51.145.154.2 AS8075 Microsoft Corporation 0.25ms from Amsterdam, NL
51.145.160.39 AS8075 Microsoft Corporation 0.22ms from Amsterdam, NL
51.145.215.135 AS8075 Microsoft Corporation 0.24ms from Amsterdam, NL
51.145.143.91 AS8075 Microsoft Corporation 0.25ms 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
77.171.245.207 AS1136 KPN B.V. 1.68ms from Amsterdam, NL
142.44.183.111 AS16276 OVH SAS 0.41ms from Beauharnois, CA
186.113.68.63 AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC 3.34ms from Bogota, CO
186.130.91.63 AS22927 Telefonica de Argentina 1.96ms from Buenos Aires, AR
108.166.105.31 AS19994 Rackspace Hosting 1.25ms from Chicago, US
109.193.235.63 AS3209 Vodafone GmbH 11.26ms from Frankfurt am Main, DE
62.156.16.111 AS3320 Deutsche Telekom AG 3.77ms from Frankfurt am Main, DE
105.113.124.223 AS36873 Airtel Networks Limited 13.11ms from Lagos, NG
88.135.50.47 AS47118 MAN net Ltd. 6.88ms from Moscow, RU
95.247.126.47 AS3269 Telecom Italia S.p.A. 3.34ms from Naples, IT
5.128.119.63 AS31200 Novotelecom Ltd 1.51ms from Novosibirsk, RU
79.218.188.175 AS3320 Deutsche Telekom AG 6.59ms from Nuernberg, DE
52.250.23.95 AS8075 Microsoft Corporation 0.28ms from Quincy, US
154.209.222.95 AS49505 JSC Selectel 1.03ms from Saint Petersburg, RU
148.100.209.143 AS6124 Marist University 2.67ms from Secaucus, US
183.184.23.175 AS4837 CHINA UNICOM China169 Backbone 3.03ms from Taiyuan, CN
105.154.214.207 AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM 8.42ms from Casablanca, MA
138.122.210.255 AS28343 UNIFIQUE TELECOMUNICACOES S/A 6.68ms from Chapeco, BR
75.191.182.47 AS11426 Charter Communications Inc 7.43ms from Charlotte, US
222.177.247.159 AS4134 CHINANET-BACKBONE 1.59ms from Chongqing, CN
171.240.244.175 AS7552 Viettel Group 1.13ms from Ho Chi Minh City, VN
73.32.83.47 AS7922 Comcast Cable Communications, LLC 7.54ms from Houston, US
167.142.132.239 AS5056 Aureon Network Services 6.25ms from Kansas City, US
81.103.236.95 AS5089 Virgin Media Limited 7.17ms from London, GB
195.74.111.15 AS8468 ENTANET International Limited 1.17ms from London, GB

Traceroute

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

$
traceroute -a -n -q1 -f2 51.144.21.123
traceroute to 51.144.21.123 (51.144.21.123): 64 hops max, 52 byte packets
2 [AS6718] 128.0.34.101 22.548 ms
3 *
4 *
5 *
7 [AS8075] 104.44.43.133 30.051 ms
8 *
9 *
10 *
11 *
12 [AS8075] 104.44.52.186 37.715 ms
13 *
14 *
15 *
16 *
17 [AS8075] 51.144.21.123 36.241 ms
Measurement taken from IPinfo ProbeNet in Bucharest, RO
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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