172.56.112.0/21

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:      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


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

Overlapping Ranges

BGP prefixes that contain 172.56.112.0/21

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 4 domain names hosted across 4 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
172.56.118.214	b-buckner.com	1
172.56.112.58	dcdiag.net	1

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
171.100.243.117	AS7470 TRUE INTERNET Co.,Ltd.	`1.97ms` from Bangkok, TH
89.18.70.69	AS49406 Fast Wireless Internet Ltd	`15.19ms` from Dublin, IE
5.35.234.117	AS20773 Host Europe GmbH	`3.05ms` from Frankfurt am Main, DE
116.6.37.117	AS136199 CHINANET Guangdong province Yuedong MAN network	`4.74ms` from Guangzhou, CN
114.234.163.85	AS4134 CHINANET-BACKBONE	`10.42ms` from Huai'an, CN
200.37.85.69	AS6147 INTEGRATEL PERÚ S.A.A.	`1.30ms` from Lima, PE
31.190.212.53	AS1267 WIND TRE S.P.A.	`1.94ms` from Milan, IT
81.57.38.85	AS29447 SCALEWAY S.A.S.	`13.24ms` from Milan, IT
58.213.164.181	AS4134 CHINANET-BACKBONE	`1.13ms` from Nanjing, CN
189.148.143.101	AS8151 UNINET	`13.19ms` from Santiago de Queretaro, MX
49.59.76.197	AS4766 Korea Telecom	`3.86ms` from Seoul, KR
186.183.17.245	AS28114 Alpha Tel S.A.	`0.70ms` from Buenos Aires, AR
34.118.200.69	AS396982 Google LLC	`0.13ms` from Council Bluffs, US
194.25.240.117	AS3320 Deutsche Telekom AG	`1.41ms` from Duesseldorf, DE
34.141.54.117	AS396982 Google LLC	`0.10ms` from Frankfurt am Main, DE
59.149.153.85	AS9269 Hong Kong Broadband Network Ltd.	`0.96ms` from Hong Kong, HK
81.131.78.181	AS2856 British Telecommunications PLC	`2.58ms` from London, GB
37.186.129.149	AS20811 Retelit Digital Services S.p.A.	`4.50ms` from Milan, IT
96.72.33.85	AS7922 Comcast Cable Communications, LLC	`8.14ms` from Minneapolis, US
94.159.122.101	AS49531 NetCom-R LLC	`1.02ms` from Moscow, RU
58.190.115.53	AS17511 OPTAGE Inc.	`1.73ms` from Osaka, JP
77.238.182.69	AS203070 Yahoo-UK Limited	`0.34ms` from Paris, FR
181.218.66.21	AS28573 Claro NXT Telecomunicacoes Ltda	`2.80ms` from Porto Alegre, BR
112.158.27.69	AS17858 LG POWERCOMM	`2.01ms` from Seoul, KR
1.99.135.21	AS4766 Korea Telecom	`2.05ms` from Seoul, KR

Traceroute

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

traceroute -a -n -q1 -f2 -m6 172.56.116.164

traceroute to 172.56.116.164 (172.56.116.164): 6 hops max, 52 byte packets

2 [] 156.146.32.232 0.649 ms

3 [AS60068] 185.229.188.49 0.204 ms

4 *

5 *

6 *

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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