172.56.72.0/21

AS21928 · T-Mobile USA, Inc.

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Summary

Country	United States
Domain	t-mobile.com
ASN	AS21928
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
OriginAS:       21928
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:        abuse@t-mobile.com
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:        ARINtechcontact@t-mobile.com
Source:         ARIN

Hosted domains

There are 10 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
172.56.78.180	lmsele.com	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
206.248.235.37	AS7795 LUMOS Networks, Inc.	`0.56ms` from Ashburn, US
52.226.51.197	AS8075 Microsoft Corporation	`0.35ms` from Ashburn, US
75.177.33.101	AS11426 Charter Communications Inc	`8.35ms` from Atlanta, US
176.126.203.101	AS44043 Cyber_Folks SRL	`5.61ms` from Bucharest, RO
172.244.69.21	AS7922 Comcast Cable Communications, LLC	`1.15ms` from Chicago, US
47.209.247.213	AS19108 Optimum	`13.01ms` from Dallas, US
38.41.228.69	AS264764 Innova Outsourcing S.A	`1.73ms` from Guatemala City, GT
14.189.165.53	AS45899 VNPT Corp	`2.21ms` from Hanoi, VN
188.220.215.53	AS5607 Sky UK Limited	`1.64ms` from London, GB
47.145.30.69	AS5650 Frontier Communications of America, Inc.	`3.12ms` from Los Angeles, US
93.191.43.149	AS47332 LASOTEL SAS	`2.01ms` from Lyon, FR
4.14.208.5	AS3356 Level 3 Parent, LLC	`0.59ms` from Minneapolis, US
68.84.54.85	AS7922 Comcast Cable Communications, LLC	`10.62ms` from New York City, US
27.202.64.133	AS4837 CHINA UNICOM China169 Backbone	`7.72ms` from Qingdao, CN
125.130.187.69	AS4766 Korea Telecom	`2.00ms` from Seoul, KR
110.46.239.21	AS9697 LG HelloVision Corp.	`8.59ms` from Seoul, KR
140.123.72.21	AS1659 Taiwan Academic Network (TANet) Information Center	`5.83ms` from Taipei, TW
210.191.26.229	AS2516 KDDI CORPORATION	`0.81ms` from Tokyo, JP
147.194.253.117	AS15128 Comwave Telecom Inc.	`10.88ms` from Toronto, CA
117.35.201.133	AS4134 CHINANET-BACKBONE	`6.21ms` from Xi'an, CN
24.74.26.117	AS11426 Charter Communications Inc	`11.11ms` from Charlotte, US
40.135.14.37	AS7029 Windstream Communications LLC	`0.47ms` from Dallas, US
82.221.56.117	AS44515 Advania Island ehf	`0.39ms` from Hafnarfjoerdur, IS
154.215.109.213	AS139880 OWGELS INTERNATIONAL CO., LIMITED	`1.03ms` from Hong Kong, HK
24.197.179.21	AS20115 Charter Communications LLC	`9.00ms` from Minneapolis, 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 -m7 172.56.78.187

traceroute to 172.56.78.187 (172.56.78.187): 7 hops max, 52 byte packets

4 [AS6939] 72.52.94.241 0.629 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Portland, US

On August 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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