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
51.172.0.0/15 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
51.220.0.0/15 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
51.190.0.0/15 AS5607 SKY UK Limited 131,072
51.212.0.0/15 AS16509 A100 ROW Inc 131,072
51.184.0.0/15 AS16509 A100 ROW Inc 131,072
51.174.0.0/15 AS29695 Altibox AS 131,072
51.208.0.0/15 AS16509 A100 ROW Inc 131,072
51.168.0.0/15 AS16509 A100 ROW Inc 131,072
51.224.0.0/15 AS16509 Amazon Data Services European Sovereign Cloud GmbH 131,072
51.232.0.0/15 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
51.252.0.0/15 AS25019 Saudi Telecom Company JSC 131,072
51.186.0.0/15 AS5607 SKY UK Limited 131,072
51.216.0.0/15 AS16509 A100 ROW Inc 131,072
51.4.0.0/15 AS8075 Microsoft Deutschland MCIO GmbH 131,072
51.180.0.0/15 AS16509 A100 ROW Inc 131,072
51.214.0.0/15 AS16509 A100 Row Inc 131,072
51.196.0.0/15 AS16509 A100 ROW Inc 131,072
51.182.0.0/15 AS5607 SKY UK Limited 131,072
51.156.0.0/15 AS16509 A100 Row Inc 131,072
51.122.0.0/15 AS16509 A100 Row Inc 131,072
51.188.0.0/15 AS16509 A100 ROW Inc 131,072
51.254.0.0/15 AS16276 OVH SAS 131,072
51.176.0.0/15 AS16509 A100 ROW Inc 131,072
51.192.0.0/15 AS16509 A100 ROW Inc 131,072
51.16.0.0/15 AS16509 A100 Row Inc 131,072
51.228.0.0/15 AS16509 A100 ROW Inc 131,072
51.139.0.0/16 AS16509 A100 ROW Inc 65,536
51.150.0.0/16 AS16509 A100 Row Inc 65,536
51.20.0.0/16 AS16509 A100 ROW Inc 65,536
51.148.0.0/16 AS13037 Zen Internet Limited 65,536
51.125.0.0/16 AS16509 A100 ROW Inc 65,536
51.131.0.0/16 AS16509 A100 ROW Inc 65,536
51.134.0.0/16 AS16509 A100 ROW Inc 65,536
51.110.0.0/16 AS16509 A100 Row Inc 65,536
51.108.0.0/16 AS16509 A100 Row Inc 65,536
51.160.0.0/16 AS16509 A100 ROW Inc 65,536
51.21.0.0/16 AS16509 A100 ROW Inc 65,536
51.91.0.0/16 AS16276 OVH SAS 65,536
51.89.0.0/16 AS16276 OVH SAS 65,536
51.83.0.0/16 AS16276 OVH SAS 65,536
51.112.0.0/16 AS16509 A100 ROW Inc 65,536
51.77.0.0/16 AS16276 OVH SAS 65,536

Hosted domains

There are 8,671 domain names hosted across 1,002 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 822
51.144.188.75 boschaftermarket.com 424
51.144.190.143 larousse.fr 346
51.144.7.192 familieretshuset.dk 258
51.144.88.178 capsugel.com 239
51.144.159.14 herinneringsbos.nl 212
51.145.11.248 lloyds.com 208
51.144.182.8 cityandguilds.com 185
51.144.116.43 damirscorner.com 177
51.144.186.101 heydoc.pl 170
51.145.250.217 nets.eu 146
51.144.164.215 relearning.education 142
51.144.107.53 ruokavirasto.fi 142
51.145.26.96 ofertasmimosaproteina.com 133
51.145.92.67 unityot.co.uk 128
51.145.232.156 franquiciashoy.es 118
51.145.209.49 zorg-vernieuwers.nl 111
51.144.54.180 alphatv.gr 100
51.145.144.212 roman-paulus.cz 98
51.145.38.120 tyresinluton.co.uk 97

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

17,038 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
51.144.100.254 AS8075 Microsoft Corporation 0.26ms from Amsterdam, NL
51.144.57.135 AS8075 Microsoft Corporation 0.24ms from Amsterdam, NL
51.144.85.194 AS8075 Microsoft Corporation 0.24ms from Amsterdam, NL
51.144.79.232 AS8075 Microsoft Corporation 0.28ms from Amsterdam, NL
51.144.65.62 AS8075 Microsoft Corporation 0.24ms from Amsterdam, NL
51.144.47.77 AS8075 Microsoft Corporation 0.23ms from Amsterdam, NL
51.144.49.212 AS8075 Microsoft Corporation 0.24ms from Amsterdam, NL
51.144.34.233 AS8075 Microsoft Corporation 0.23ms from Amsterdam, NL
51.144.83.65 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.144.96.96 AS8075 Microsoft Corporation 0.25ms from Amsterdam, NL
51.144.42.166 AS8075 Microsoft Corporation 0.22ms from Amsterdam, NL
51.144.40.174 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.144.69.28 AS8075 Microsoft Corporation 0.31ms from Amsterdam, NL
51.144.61.143 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.144.43.42 AS8075 Microsoft Corporation 0.23ms from Amsterdam, NL
51.144.19.66 AS8075 Microsoft Corporation 0.24ms from Amsterdam, NL
51.144.77.151 AS8075 Microsoft Corporation 0.27ms from Amsterdam, NL
51.144.84.123 AS8075 Microsoft Corporation 0.23ms from Amsterdam, NL
51.144.56.170 AS8075 Microsoft Corporation 0.25ms from Amsterdam, NL
51.144.90.1 AS8075 Microsoft Corporation 0.26ms from Amsterdam, NL
51.144.45.220 AS8075 Microsoft Corporation 0.24ms from Amsterdam, NL
51.144.22.157 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
51.144.51.136 AS8075 Microsoft Corporation 0.25ms from Amsterdam, NL
51.144.102.157 AS8075 Microsoft Corporation 0.23ms from Amsterdam, NL
51.144.21.106 AS8075 Microsoft Corporation 0.26ms 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
68.10.231.31 AS22773 Cox Communications Inc. 9.85ms from Ashburn, US
69.244.64.143 AS7922 Comcast Cable Communications, LLC 4.40ms from Ashburn, US
20.121.4.15 AS8075 Microsoft Corporation 0.42ms from Ashburn, US
45.229.206.15 AS266721 VISIO RED SRL 0.40ms from Buenos Aires, AR
192.182.47.159 AS5650 Frontier Communications of America, Inc. 5.15ms from Chicago, US
209.93.203.255 AS6871 Plusnet 15.51ms from Erith, GB
130.61.154.15 AS31898 Oracle Corporation 0.37ms from Frankfurt am Main, DE
46.93.150.31 AS3320 Deutsche Telekom AG 11.41ms from Frankfurt am Main, DE
14.189.108.239 AS45899 VNPT Corp 5.15ms from Hanoi, VN
14.247.26.143 AS45899 VNPT Corp 3.34ms from Hanoi, VN
203.80.68.79 AS9269 Hong Kong Broadband Network Ltd. 0.86ms from Hong Kong, HK
222.186.131.31 AS4134 CHINANET-BACKBONE 4.20ms from Huai'an, CN
95.144.166.15 AS2856 British Telecommunications PLC 6.28ms from London, GB
92.176.27.95 AS12479 Orange Espagne SA 18.93ms from Madrid, ES
108.5.227.95 AS701 Verizon Business 1.76ms from New York City, US
72.186.179.143 AS33363 Charter Communications, Inc 16.14ms from Orlando, US
23.19.133.15 AS19148 Leaseweb USA, Inc. 1.08ms from Phoenix, US
211.221.35.223 AS4766 Korea Telecom 7.34ms from Seoul, KR
13.250.146.31 AS16509 Amazon.com, Inc. 0.12ms from Singapore, SG
1.175.35.239 AS3462 Data Communication Business Group 5.66ms from Taichung, TW
64.141.50.15 AS399688 Hy-Tek Computer Sales and Services Ltd 7.07ms from Calgary, CA
95.138.100.127 AS21351 Canal + Telecom SAS 1.11ms from Le Lamentin, MQ
212.145.49.159 AS12430 VODAFONE ESPANA S.A.U. 11.72ms from Madrid, ES
87.22.21.255 AS3269 Telecom Italia S.p.A. 3.40ms from Milan, IT
95.84.135.111 AS42610 PJSC Rostelecom 1.39ms from Moscow, RU

Traceroute

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

$
traceroute -a -n -q1 51.144.19.1
traceroute to 51.144.19.1 (51.144.19.1): 64 hops max, 52 byte packets
1 [AS57403] 188.241.240.1 24.011 ms
2 *
3 *
4 [AS8075] 104.44.197.201 10.761 ms
5 [AS8075] 104.44.41.51 83.812 ms
6 [AS8075] 13.106.238.234 68.576 ms
7 [AS8075] 51.10.16.9 44.842 ms
8 *
9 *
10 [AS8075] 104.44.52.186 53.645 ms
11 *
12 *
13 *
14 *
15 [AS8075] 51.144.19.1 44.801 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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