172.56.104.0/21

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:      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


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

Hosted domains

There are 10 domain names hosted across 10 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
172.56.104.235	getbetter.email	1
172.56.105.128	thechoe.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
212.189.202.5	AS137 Consortium GARR	`11.74ms` from Arezzo, IT
136.47.219.181	AS16591 Google Fiber Inc.	`6.89ms` from Ashburn, US
177.22.190.149	AS263121 Atende Telecom LTDA	`8.09ms` from Belo Horizonte, BR
187.181.181.69	AS28573 Claro NXT Telecomunicacoes Ltda	`10.83ms` from Curitiba, BR
208.85.180.245	AS16654 Vero Broadband	`3.08ms` from Denver, US
54.75.89.165	AS16509 Amazon.com, Inc.	`0.19ms` from Dublin, IE
27.71.155.245	AS7552 Viettel Group	`15.63ms` from Ho Chi Minh City, VN
156.240.52.165	AS139646 HONG KONG Megalayer Technology Co.,Limited	`3.16ms` from Hong Kong, HK
197.157.144.245	AS327707 Airtel Rwanda Ltd	`0.99ms` from Kigali, RW
175.150.96.37	AS4837 CHINA UNICOM China169 Backbone	`12.92ms` from Liaoyang, CN
82.71.50.245	AS13037 Zen Internet Ltd	`2.17ms` from London, GB
90.203.56.229	AS5607 Sky UK Limited	`6.23ms` from London, GB
201.174.16.37	AS32098 Transtelco Inc	`0.61ms` from Los Angeles, US
151.26.133.213	AS1267 WIND TRE S.P.A.	`17.39ms` from Milan, IT
108.62.137.181	AS396362 Leaseweb USA, Inc.	`0.77ms` from New York City, US
222.144.190.37	AS4713 NTT Communications Corporation	`3.35ms` from Osaka, JP
67.181.9.21	AS7922 Comcast Cable Communications, LLC	`9.59ms` from Santa Clara, US
200.6.122.165	AS27659 Ingeniería e Informática Asociada Ltda (IIA Ltda)	`0.79ms` from Santiago, CL
189.238.181.85	AS8151 UNINET	`15.55ms` from Santiago de Queretaro, MX
116.46.62.229	AS17858 LG POWERCOMM	`5.54ms` from Seoul, KR
119.212.138.149	AS4766 Korea Telecom	`2.58ms` from Seoul, KR
220.84.98.181	AS4766 Korea Telecom	`6.69ms` from Seoul, KR
14.56.65.133	AS4766 Korea Telecom	`2.90ms` from Seoul, KR
93.173.35.37	AS1680 Cellcom Fixed Line Communication L.P	`2.78ms` from Tel Aviv, IL
221.249.135.53	AS17506 ARTERIA Networks Corporation	`0.92ms` 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 -f4 -m10 172.56.106.232

traceroute to 172.56.106.232 (172.56.106.232): 10 hops max, 52 byte packets

4 [AS63949] 173.230.159.133 21.209 ms

5 [AS20940] 23.203.158.50 0.753 ms

6 [AS20940] 23.207.232.33 0.67 ms

7 [AS21928] 66.94.0.36 0.823 ms

8 *

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Measurement taken from

IPinfo ProbeNet in Santa Clara, 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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