128.203.0.0/16

AS8075 · Microsoft Corporation

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Summary

Country	United Kingdom
Domain	microsoft.com
ASN	AS8075
Registry	RIPE
ID	UK-MICROSOFT-19870219

WHOIS Details

inetnum:        128.203.0.0 - 128.203.255.255
netname:        UK-MICROSOFT-19870219
country:        GB
org:            ORG-MA42-RIPE
admin-c:        DH5439-RIPE
tech-c:         MRPA3-RIPE
status:         ALLOCATED PA
mnt-by:         MICROSOFT-MAINT
mnt-by:         RIPE-NCC-HM-MNT
created:        2023-09-18T13:18:03Z
last-modified:  2023-09-18T13:18:03Z
source:         RIPE
abuse-email:    abuse@microsoft.com
abuse-c:        MAC274-RIPE
abuse-org:      ORG-MA42-RIPE

organisation:   ORG-MA42-RIPE
org-name:       Microsoft Limited
country:        GB
org-type:       LIR
descr:          Microsoft Corporation AS8075
descr:          To report suspected security issues specific to
descr:          traffic emanating from Microsoft online services,
descr:          including the distribution of malicious content
descr:          or other illicit or illegal material through a
descr:          Microsoft online service, please submit reports
descr:          to:
descr:          * https://cert.microsoft.com
descr:          For SPAM and other abuse issues, such as Microsoft
descr:          Accounts, please contact:
descr:          * abuse@microsoft.com
descr:          To report security vulnerabilities in Microsoft
descr:          products and services, please contact:
descr:          * secure@microsoft.com
descr:          For legal and law enforcement-related requests,
descr:          please contact:
descr:          * msndcc@microsoft.com
descr:          For routing, peering or DNS issues, please
descr:          contact:
descr:          * IOC@microsoft.com
address:        One Microsoft Way
address:        WA 98052
address:        Redmond
address:        UNITED STATES
phone:          +1 425 882 8080
fax-no:         +1 425 936 7329
e-mail:         iphostmaster@microsoft.com
abuse-c:        MAC274-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        MICROSOFT-MAINT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MICROSOFT-MAINT
created:        2004-04-17T12:18:10Z
last-modified:  2022-03-08T18:20:31Z
source:         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

Nearby Ranges

BGP prefixes that overlap with 128.0.0.0/8

Range	ASN	Company	Num of IPs
128.78.0.0/15	AS5410	Bouygues Telecom SA	131,072
128.178.0.0/15	AS559	Ecublens Camp Net	131,072
128.130.0.0/15	AS679	Technische Universitaet Wien	131,072
128.180.0.0/16	AS6522	Lehigh University	65,536
128.49.0.0/16	AS22	Navy Network Information Center (NNIC)	65,536
128.218.0.0/16	AS5653	University of California San Francisco	65,536
128.171.0.0/16	AS6360	University of Hawaii	65,536
128.120.0.0/16	AS6192	University of California, Davis	65,536
128.234.0.0/16	AS25019	Saudi Telecom Company JSC	65,536
128.227.0.0/16	AS6356	University of Florida	65,536
128.238.0.0/16	AS54965	Polytechnic University	65,536
128.52.0.0/16	AS3	Massachusetts Institute of Technology	65,536
128.248.0.0/16	AS6200	University of Illinois Chicago	65,536
128.60.0.0/16	AS48	Navy Network Information Center (NNIC)	65,536
128.235.0.0/16	AS4246	New Jersey Institute of Technology	65,536
128.211.0.0/16	AS397511	Purdue University	65,536
128.249.0.0/16	AS302	Baylor College of Medicine	65,536
128.143.0.0/16	AS225	University of Virginia	65,536
128.100.0.0/16	AS239	University of Toronto	65,536
128.32.0.0/16	AS25	University of California at Berkeley	65,536
128.97.0.0/16	AS52	University of California, Los Angeles	65,536
128.219.0.0/16	AS50	Oak Ridge National Laboratory	65,536
128.200.0.0/16	AS299	University of California, Irvine	65,536
128.253.0.0/16	AS26	Cornell University	65,536
128.134.0.0/16	AS45381	Korea Telecom	65,536
128.134.0.0/16	AS4766	Korea Telecom	65,536
128.231.0.0/16	AS3527	National Institutes of Health	65,536
128.6.0.0/16	AS46	Rutgers, The State University	65,536
128.163.0.0/16	AS396261	University of Kentucky	65,536
128.118.0.0/16	AS3999	The Pennsylvania State University	65,536
128.211.0.0/16	AS397501	Purdue University	65,536
128.210.0.0/16	AS397511	Purdue University	65,536
128.177.0.0/16	AS6461	Zayo Bandwidth	65,536
128.34.0.0/16	AS22	Navy Network Information Center (NNIC)	65,536
128.93.0.0/16	AS2200	Institut National de Recherche en Informatique et Automatique	65,536
128.39.0.0/16	AS224	UNINETT backbone network	65,536
128.233.0.0/16	AS22950	University of Saskatchewan	65,536
128.163.0.0/16	AS23162	University of Kentucky	65,536
128.170.0.0/16	AS243	L3Harris Technologies, Inc.	65,536
128.98.0.0/16	AS24775	QinetiQ TIM	65,536
128.195.0.0/16	AS299	University of California, Irvine	65,536
128.226.0.0/16	AS4190	Binghamton University	65,536
128.53.0.0/16	AS2514	NTT PC Communications,Inc.	65,536
128.28.0.0/16	AS2514	NTT PC Communications,Inc.	65,536
128.47.0.0/16	AS252	Headquarters, USAISC	65,536
128.84.0.0/16	AS26	Cornell University	65,536
128.252.0.0/16	AS2552	Washington University	65,536
128.186.0.0/16	AS2553	Florida State University	65,536
128.123.0.0/16	AS40246	New Mexico State University	65,536
128.18.0.0/16	AS264	SRI International	65,536

Hosted domains

There are 445 domain names hosted across 137 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
128.203.141.41	buymssoft.com	58
128.203.250.56	bcycle.com	47
128.203.237.15	michiganurgentcare.com	42
128.203.86.32	movo.technology	28
128.203.129.14	aaaceus.com	27
128.203.105.253	smamunicipalmanager.com	18
128.203.192.176	eliteforumsglobal.com	15
128.203.132.52	olinchloralkali.ca	14
128.203.233.133	dbu.edu	11
128.203.131.149	nexgenrx.us	10
128.203.168.223	iowarealty.net	10
128.203.243.251	newgensoft.com	6
128.203.235.118	ciyex.com	4
128.203.220.13	tournaments360.me	3
128.203.206.210	infonet-biovision.org	3
128.203.92.99	hirework.com.br	3
128.203.201.190	techyeahinc.com	3
128.203.74.45	iccscd.com.br	3
128.203.137.226	hcpsampling.com	3
128.203.123.108	darwoft.us	3

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

18,040 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
128.203.149.119	AS8075 Microsoft Corporation	`0.18ms` from Des Moines, US
128.203.183.65	AS8075 Microsoft Corporation	`0.18ms` from Des Moines, US
128.203.236.181	AS8075 Microsoft Corporation	`0.18ms` from Des Moines, US
128.203.129.232	AS8075 Microsoft Corporation	`0.23ms` from Des Moines, US
128.203.77.32	AS8075 Microsoft Corporation	`0.41ms` from Ashburn, US
128.203.124.48	AS8075 Microsoft Corporation	`0.41ms` from Ashburn, US
128.203.113.62	AS8075 Microsoft Corporation	`0.36ms` from Ashburn, US
128.203.136.245	AS8075 Microsoft Corporation	`0.29ms` from Des Moines, US
128.203.219.246	AS8075 Microsoft Corporation	`0.18ms` from Des Moines, US
128.203.218.203	AS8075 Microsoft Corporation	`0.19ms` from Des Moines, US
128.203.169.149	AS8075 Microsoft Corporation	`0.18ms` from Des Moines, US
128.203.125.63	AS8075 Microsoft Corporation	`0.39ms` from Ashburn, US
128.203.69.114	AS8075 Microsoft Corporation	`0.33ms` from Ashburn, US
128.203.32.131	AS8075 Microsoft Corporation	`0.47ms` from Ashburn, US
128.203.181.39	AS8075 Microsoft Corporation	`0.17ms` from Des Moines, US
128.203.160.167	AS8075 Microsoft Corporation	`0.23ms` from Des Moines, US
128.203.168.187	AS8075 Microsoft Corporation	`0.17ms` from Des Moines, US
128.203.132.248	AS8075 Microsoft Corporation	`0.23ms` from Des Moines, US
128.203.133.106	AS8075 Microsoft Corporation	`0.23ms` from Des Moines, US
128.203.101.240	AS8075 Microsoft Corporation	`0.42ms` from Ashburn, US
128.203.94.45	AS8075 Microsoft Corporation	`0.35ms` from Ashburn, US
128.203.118.79	AS8075 Microsoft Corporation	`0.36ms` from Ashburn, US
128.203.80.124	AS8075 Microsoft Corporation	`0.39ms` from Ashburn, US
128.203.144.19	AS8075 Microsoft Corporation	`0.20ms` from Des Moines, US
128.203.167.48	AS8075 Microsoft Corporation	`0.26ms` from Des Moines, US

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
86.96.21.64	AS5384 Emirates Internet	`2.21ms` from Al Fujairah City, AE
216.15.22.144	AS6079 RCN	`5.80ms` from Ashburn, US
47.95.204.176	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`2.06ms` from Beijing, CN
91.7.86.48	AS3320 Deutsche Telekom AG	`5.29ms` from Berlin, DE
52.42.194.64	AS16509 Amazon.com, Inc.	`0.16ms` from Boardman, US
205.178.10.224	AS6079 RCN	`4.91ms` from Chicago, US
176.71.56.64	AS1257 Tele2 Sverige AB	`0.48ms` from Goeteborg, SE
78.85.250.64	AS12389 PJSC Rostelecom	`19.03ms` from Kazan, RU
94.63.118.192	AS12353 Vodafone Portugal	`3.77ms` from Lisbon, PT
5.57.61.224	AS204167 Hyve Ltd	`0.43ms` from London, GB
14.12.39.32	AS2516 KDDI CORPORATION	`14.74ms` from Osaka, JP
170.33.31.128	AS45102 Alibaba (US) Technology Co., Ltd.	`0.34ms` from Singapore, SG
16.62.190.144	AS16509 Amazon.com, Inc.	`0.27ms` from Zuerich, CH
177.114.231.0	AS26599 TELEFÔNICA BRASIL S.A	`12.50ms` from Belo Horizonte, BR
180.105.184.208	AS4134 CHINANET-BACKBONE	`9.16ms` from Huai'an, CN
38.120.74.0	AS174 Cogent Communications, LLC	`2.29ms` from Lincoln, US
95.237.116.224	AS3269 Telecom Italia S.p.A.	`1.49ms` from Milan, IT
68.161.177.176	AS701 Verizon Business	`2.72ms` from New York City, US
83.109.98.32	AS2119 Telenor Norge AS	`0.98ms` from Oslo, NO
83.108.119.192	AS2119 Telenor Norge AS	`0.97ms` from Oslo, NO
54.234.48.96	AS14618 Amazon.com, Inc.	`0.23ms` from Reston, US
186.104.115.112	AS7418 TELEFÓNICA CHILE S.A.	`6.51ms` from Santiago, CL
182.13.8.144	AS23693 PT. Telekomunikasi Selular	`12.65ms` from Batam, ID
156.196.221.144	AS8452 TE-AS	`5.14ms` from Cairo, EG
18.200.235.224	AS16509 Amazon.com, Inc.	`0.20ms` from Dublin, IE

Traceroute

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

traceroute -a -n -q1 128.203.183.92

traceroute to 128.203.183.92 (128.203.183.92): 64 hops max, 52 byte packets

1 [AS2901] 198.59.104.2 0.174 ms

2 [AS2901] 198.59.96.134 0.16 ms

3 [AS2901] 198.59.96.128 0.178 ms

4 *

5 *

6 *

7 [AS8075] 104.44.234.84 11.852 ms

8 *

9 *

10 *

11 [AS8075] 104.44.55.10 33.203 ms

12 *

13 *

14 *

15 *

16 [AS8075] 128.203.183.92 33.172 ms

Measurement taken from

IPinfo ProbeNet in Albuquerque, US

On October 30th 2025

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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