172.56.0.0/23

AS21928 · T-Mobile USA, Inc.

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Summary

Country	United States
Domain	t-mobile.com
ASN	AS21928
Parent Range	172.32.0.0/11
Registry	ARIN
ID	TMO9

WHOIS Details

NetHandle:      NET-172-32-0-0-1
OrgID:          TMOBI
Parent:         NET-172-0-0-0-0
NetName:        TMO9
NetRange:       172.32.0.0 - 172.63.255.255
NetType:        allocation
Comment:        Geofeed https://raw.githubusercontent.com/tmobile/tmus-geofeed/main/tmus-geo-ip.txt
RegDate:        2012-09-18
Updated:        2020-11-18
Source:         ARIN


OrgID:          TMOBI
OrgName:        T-Mobile USA, Inc.
CanAllocate:    
Street:         12920 SE 38th Street
City:           Bellevue
State/Prov:     WA
Country:        US
PostalCode:     98006
RegDate:        2003-01-02
Updated:        2017-01-28
OrgAdminHandle: DNSAD11-ARIN
OrgTechHandle:  DNSAD11-ARIN
OrgAbuseHandle: ABUSE4857-ARIN
Source:         ARIN


POCHandle:      ABUSE4857-ARIN
IsRole:         Y
LastName:       abuse
FirstName:      
Street:         12920 SE 38th Street
City:           Bellevue
State/Prov:     WA
Country:        US
PostalCode:     98006
RegDate:        2014-09-23
Updated:        2025-05-27
OfficePhone:    +1-888-662-4662
Mailbox:        [email protected]
Source:         ARIN


POCHandle:      DNSAD11-ARIN
IsRole:         Y
LastName:       DNS Administrators
FirstName:      
Street:         12920 SE 38th Street
City:           Bellevue
State/Prov:     WA
Country:        US
PostalCode:     98027
RegDate:        2003-01-02
Updated:        2025-01-09
OfficePhone:    +1-888-662-4662
Mailbox:        [email protected]
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 172.56.0.0/23

Range	ASN	Company	Num of IPs
172.32.0.0/11	AS21928	T-Mobile USA, Inc.	2,097,152

Nearby Ranges

BGP prefixes that overlap with 172.56.0.0/16

Range	ASN	Company	Num of IPs
172.32.0.0/11	AS21928	T-Mobile USA, Inc.	2,097,152

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

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
172.111.216.247	AS3223 Voxility LLP	`0.33ms` from Amsterdam, NL
205.197.239.135	AS2828 Verizon Business	`1.31ms` from Atlanta, US
92.112.184.183	AS47583 Hostinger International Limited	`0.70ms` from Boston, US
223.155.249.199	AS4134 CHINANET-BACKBONE	`5.39ms` from Changsha, CN
34.29.216.7	AS396982 Google LLC	`0.11ms` from Council Bluffs, US
66.68.33.39	AS11427 Charter Communications Inc	`9.22ms` from Houston, US
46.166.40.39	AS25454 ORANGE MOLDOVA S.A.	`19.47ms` from Iasi, RO
51.4.4.7	AS8075 Microsoft Corporation	`0.18ms` from Modiin Ilit, IL
27.207.196.231	AS4837 CHINA UNICOM China169 Backbone	`8.09ms` from Qingdao, CN
23.16.182.55	AS852 TELUS Communications Inc.	`4.41ms` from Seattle, US
182.122.244.23	AS4837 CHINA UNICOM China169 Backbone	`3.87ms` from Zhengzhou, CN
73.29.132.87	AS7922 Comcast Cable Communications, LLC	`8.26ms` from Ashburn, US
20.242.106.23	AS8075 Microsoft Corporation	`0.24ms` from Boydton, US
78.23.199.71	AS6848 Telenet BV	`7.53ms` from Brussels, BE
190.176.61.199	AS22927 Telefonica de Argentina	`19.63ms` from Buenos Aires, AR
31.189.4.167	AS24608 WIND TRE S.P.A.	`12.94ms` from Frosinone, IT
14.21.249.167	AS4134 CHINANET-BACKBONE	`2.99ms` from Guangzhou, CN
147.30.56.23	AS9198 JSC Kazakhtelecom	`4.70ms` from Karagandy, KZ
94.3.180.199	AS5607 Sky UK Limited	`7.88ms` from London, GB
146.174.17.39	AS4181 TDS TELECOM	`8.36ms` from Los Angeles, US
143.42.182.199	AS63949 Akamai Connected Cloud	`0.18ms` from Morris Plains, US
139.129.171.247	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`0.42ms` from Qingdao, CN
70.67.137.87	AS6327 Shaw Communications	`8.78ms` from Seattle, US
36.228.75.7	AS3462 Data Communication Business Group	`2.04ms` from Taipei, TW
153.122.84.247	AS131921 GMO GlobalSign Holdings K.K.	`1.15ms` from Tokyo, JP

Traceroute

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

traceroute -a -n -q1 -f3 -m7 172.56.1.35

traceroute to 172.56.1.35 (172.56.1.35): 7 hops max, 52 byte packets

3 [] 84.17.33.92 0.234 ms

4 [AS60068] 185.229.188.49 0.248 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Chicago, US

On December 14th 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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