172.56.72.0/21

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:      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 172.56.72.0/21

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 11 domain names hosted across 9 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
172.56.72.111	abettercommissary.com	2
172.56.79.198	ccbtech.org	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

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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
20.229.224.213	AS8075 Microsoft Corporation	`0.27ms` from Amsterdam, NL
73.54.210.149	AS7922 Comcast Cable Communications, LLC	`4.97ms` from Atlanta, US
156.193.255.197	AS8452 TE-AS	`5.43ms` from Cairo, EG
170.244.203.149	AS266013 Moratec Equipamentos	`2.93ms` from Curitiba, BR
77.91.78.245	AS211522 Hypercore Ltd	`0.46ms` from Frankfurt am Main, DE
141.94.85.21	AS16276 OVH SAS	`0.10ms` from Gravelines, FR
176.217.227.181	AS8386 Vodafone Net Iletisim Hizmetler AS	`10.94ms` from Istanbul, TR
5.8.192.101	AS49301 Joint Stock Company TransTeleCom	`0.69ms` from Khabarovsk, RU
91.140.226.69	AS3225 GULFNET COMMUNICATIONS CO. WLL	`0.63ms` from Kuwait City, KW
90.162.130.69	AS12479 Orange Espagne SA	`12.65ms` from Madrid, ES
79.41.10.21	AS3269 Telecom Italia S.p.A.	`5.80ms` from Milan, IT
68.47.34.37	AS7922 Comcast Cable Communications, LLC	`4.97ms` from Minneapolis, US
58.213.46.149	AS4134 CHINANET-BACKBONE	`1.02ms` from Nanjing, CN
177.35.150.229	AS28573 Claro NXT Telecomunicacoes Ltda	`7.62ms` from Sao Paulo, BR
73.221.192.245	AS7922 Comcast Cable Communications, LLC	`6.31ms` from Seattle, US
49.31.251.165	AS4766 Korea Telecom	`7.08ms` from Seoul, KR
119.209.93.85	AS4766 Korea Telecom	`1.59ms` from Seoul, KR
110.13.54.69	AS9318 SK Broadband Co Ltd	`1.93ms` from Seoul, KR
13.114.18.101	AS16509 Amazon.com, Inc.	`0.16ms` from Tokyo, JP
126.221.183.101	AS17676 SoftBank Corp.	`3.17ms` from Tokyo, JP
34.146.140.181	AS396982 Google LLC	`0.14ms` from Tokyo, JP
143.90.232.101	AS4725 SoftBank Corp.	`1.25ms` from Tokyo, JP
197.3.201.5	AS37705 TOPNET	`1.65ms` from Tunis, TN
187.112.39.213	AS18881 TELEFÔNICA BRASIL S.A	`7.09ms` from Vinhedo, BR
167.199.128.117	AS2897 Georgia Technology Authority	`7.61ms` from Atlanta, US

Traceroute

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

traceroute -a -n -q1 -f4 -m11 172.56.74.223

traceroute to 172.56.74.223 (172.56.74.223): 11 hops max, 52 byte packets

4 [AS63949] 45.79.12.101 0.378 ms

5 [AS20940] 23.203.147.38 0.887 ms

6 [AS20940] 23.209.172.88 0.953 ms

7 [AS20940] 23.209.172.93 1.028 ms

8 [AS21928] 66.94.2.114 4.153 ms

9 *

10 *

11 *

Measurement taken from

IPinfo ProbeNet in Richardson, US

On December 15th 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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