209.185.128.0/21

AS3561 · CenturyLink Communications, LLC

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Summary

Country	United States
Domain	microsoft.com
ASN	AS3561
Parent Range	209.185.0.0/16
Registry	ARIN
ID	SAVV-S233053-14

WHOIS Details

NetHandle:      NET-209-185-128-0-1
OrgID:          MSFT
Parent:         NET-209-185-0-0-1
NetName:        SAVV-S233053-14
NetRange:       209.185.128.0 - 209.185.131.255
NetType:        reallocation
RegDate:        2006-11-06
Updated:        2007-05-07
Source:         ARIN


OrgID:          MSFT
OrgName:        Microsoft Corporation
CanAllocate:    
Street:         One Microsoft Way
City:           Redmond
State/Prov:     WA
Country:        US
PostalCode:     98052
Comment:        To report suspected security issues specific to traffic emanating from Microsoft online services, including the distribution of malicious content or other illicit or illegal material through a Microsoft online service, please submit reports to:
Comment:        * https://cert.microsoft.com.  
Comment:        For SPAM and other abuse issues, such as Microsoft Accounts, please contact:
Comment:        * abuse@microsoft.com.  
Comment:        To report security vulnerabilities in Microsoft products and services, please contact:
Comment:        * secure@microsoft.com.  
Comment:        For legal and law enforcement-related requests, please contact:
Comment:        * msndcc@microsoft.com
Comment:        For routing, peering or DNS issues, please 
Comment:        contact:
Comment:        * IOC@microsoft.com
RegDate:        1998-07-10
Updated:        2025-06-10
OrgAdminHandle: IPHOS5-ARIN
OrgTechHandle:  BEDAR6-ARIN
OrgTechHandle:  IPHOS5-ARIN
OrgTechHandle:  MRPD-ARIN
OrgTechHandle:  SINGH683-ARIN
OrgAbuseHandle: MAC74-ARIN
OrgRoutingHandle:   CHATU3-ARIN
Source:         ARIN


POCHandle:      BEDAR6-ARIN
IsRole:         N
LastName:       Bedard
FirstName:      Dawn
Street:         1 Redmond Way
City:           Redmond
State/Prov:     WA
Country:        US
PostalCode:     98052
RegDate:        2016-10-20
Updated:        2025-08-19
OfficePhone:    +1-425-538-6637
Mailbox:        dabedard@microsoft.com
Source:         ARIN


POCHandle:      IPHOS5-ARIN
IsRole:         N
LastName:       IPHostmaster
FirstName:      IPHostmaster
Street:         One Microsoft Way
City:           Redmond
State/Prov:     WA
Country:        US
PostalCode:     20147
RegDate:        2021-10-13
Updated:        2025-10-21
OfficePhone:    +1-425-538-6637
Mailbox:        iphostmaster@microsoft.com
Source:         ARIN


POCHandle:      SINGH683-ARIN
IsRole:         N
LastName:       Singh
FirstName:      Prachi
Street:         1 Microsoft Way
City:           Redmond
State/Prov:     WA
Country:        US
PostalCode:     98052
RegDate:        2023-06-13
Updated:        2023-07-11
OfficePhone:    +1-425-707-5601
Mailbox:        pracsin@microsoft.com
Source:         ARIN


POCHandle:      MAC74-ARIN
IsRole:         Y
LastName:       Microsoft Abuse Contact
FirstName:      
Street:         One Microsoft Way
City:           Redmond
State/Prov:     WA
Country:        US
PostalCode:     98052
RegDate:        2013-08-20
Updated:        2025-06-10
OfficePhone:    +1-425-882-8080
Mailbox:        abuse@microsoft.com
Source:         ARIN


POCHandle:      MRPD-ARIN
IsRole:         Y
LastName:       Microsoft Routing, Peering, and DNS
FirstName:      
Street:         One Microsoft Way
City:           Redmond
State/Prov:     WA
Country:        US
PostalCode:     98052
RegDate:        2013-08-20
Updated:        2025-10-16
OfficePhone:    +1-425-882-8080
Mailbox:        IOC@microsoft.com
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 209.185.128.0/21

Range	ASN	Company	Num of IPs
209.185.0.0/16	AS3561	CenturyLink Communications, LLC	65,536

Nearby Ranges

BGP prefixes that overlap with 209.185.0.0/16

Range	ASN	Company	Num of IPs
209.185.0.0/16	AS3561	CenturyLink Communications, LLC	65,536
209.185.8.0/24	AS13713	CA, Inc. (a successor to Arcot System Inc.) Co-location	256
209.185.8.0/24	AS3561	CA, Inc. (a successor to Arcot System Inc.) Co-location	256

Hosted domains

There are no domains currently hosted on this ASN.

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

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

IP Address	ASN	Details
209.185.135.97	AS3561 CenturyLink Communications, LLC	`2.52ms` from Santa Clara, 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
86.95.150.197	AS1136 KPN B.V.	`2.83ms` from Amsterdam, NL
198.20.217.53	AS18733 ZeniMax Media Incorporated	`0.80ms` from Ashburn, US
44.238.156.85	AS16509 Amazon.com, Inc.	`0.12ms` from Boardman, US
121.214.67.101	AS1221 Telstra Limited	`3.78ms` from Brisbane, AU
103.122.64.69	AS138064 PT. Jinom Network Indonesia	`0.40ms` from Jakarta, ID
37.230.175.21	AS200350 Yandex.Cloud LLC	`6.28ms` from Moscow, RU
144.126.150.53	AS40021 Contabo Inc.	`0.74ms` from New York City, US
208.192.200.53	AS701 Verizon Business	`0.68ms` from Philadelphia, US
179.129.153.117	AS26599 TELEFÔNICA BRASIL S.A	`2.33ms` from Sao Paulo, BR
211.119.131.197	AS3786 LG DACOM Corporation	`1.24ms` from Seoul, KR
47.106.35.165	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`1.46ms` from Shenzhen, CN
60.112.125.101	AS17676 SoftBank Corp.	`2.78ms` from Tokyo, JP
99.239.225.5	AS812 Rogers Communications Canada Inc.	`3.69ms` from Toronto, CA
49.113.179.117	AS4134 CHINANET-BACKBONE	`1.96ms` from UEruemqi, CN
31.179.79.229	AS9141 P4 Sp. z o.o.	`11.58ms` from Warsaw, PL
54.174.242.213	AS14618 Amazon.com, Inc.	`0.49ms` from Ashburn, US
100.36.94.133	AS701 Verizon Business	`2.33ms` from Ashburn, US
184.71.55.213	AS6327 Shaw Communications	`0.87ms` from Calgary, CA
68.147.2.101	AS6327 Shaw Communications	`5.11ms` from Calgary, CA
97.134.91.21	AS6167 Verizon Business	`8.39ms` from Los Angeles, US
90.45.64.149	AS3215 Orange S.A.	`9.75ms` from Paris, FR
119.207.79.213	AS4766 Korea Telecom	`0.95ms` from Seoul, KR
168.232.72.21	AS262765 Net Fácil Sistemas Eletrônicos Ltda ME	`6.46ms` from São Paulo, BR
59.153.126.85	AS132471 ATOMA	`16.02ms` from Tashkent, UZ
209.29.64.21	AS852 TELUS Communications Inc.	`0.30ms` from Toronto, CA

Traceroute

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

traceroute -a -n -q1 -f2 209.185.135.89

traceroute to 209.185.135.89 (209.185.135.89): 64 hops max, 52 byte packets

2 [AS42831] 78.110.170.193 6.843 ms

3 *

4 [AS3356] 4.69.209.78 75.398 ms

5 [AS3356] 4.68.110.154 101.022 ms

6 [AS209] 67.14.43.82 141.727 ms

7 [AS3561] 208.50.173.234 142.067 ms

8 [AS3561] 208.50.179.234 140.649 ms

9 [AS3561] 209.185.135.89 141.003 ms

Measurement taken from

IPinfo ProbeNet in Coventry, GB

On December 28th 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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