172.56.104.0/21

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 172.56.104.0/21

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

IP Address	Domain	Domains on this IP
172.56.107.255	myomv.top	1
172.56.104.65	432island.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
108.141.69.245	AS8075 Microsoft Corporation	`0.21ms` from Amsterdam, NL
114.250.82.197	AS4808 China Unicom Beijing Province Network	`3.01ms` from Beijing, CN
199.253.121.245	AS393568 ITT Corporation	`1.66ms` from Boston, US
149.200.60.69	AS5483 Magyar Telekom Plc.	`6.62ms` from Budapest, HU
3.145.130.165	AS16509 Amazon.com, Inc.	`0.70ms` from Columbus, US
156.240.208.229	AS399077 Tcloudnet	`0.92ms` from Hong Kong, HK
196.41.181.165	AS16637 MTN SA	`1.97ms` from Johannesburg, ZA
102.222.89.5	AS327750 JENNY INTERNET (PTY) LTD	`14.80ms` from Johannesburg, ZA
77.229.134.133	AS12430 VODAFONE ESPANA S.A.U.	`8.22ms` from Madrid, ES
193.110.141.69	AS47954 Alpha Net Telecom Ltd	`0.81ms` from Moscow, RU
179.189.233.197	AS28669 VERO S.A	`0.46ms` from Osasco, BR
172.233.26.117	AS63949 Akamai Connected Cloud	`0.22ms` from Osasco, BR
76.138.177.117	AS7922 Comcast Cable Communications, LLC	`4.96ms` from Portland, US
213.92.201.37	AS29314 VECTRA S.A.	`5.19ms` from Poznan, PL
181.73.146.213	AS6535 Telmex Servicios Empresariales S.A.	`6.99ms` from Santiago, CL
59.18.204.197	AS4766 Korea Telecom	`1.76ms` from Seoul, KR
112.65.116.85	AS138421 China Unicom	`4.93ms` from Shanghai, CN
77.71.191.229	AS12709 Melita Limited	`5.22ms` from Swieqi, MT
60.156.122.5	AS17676 SoftBank Corp.	`3.15ms` from Tokyo, JP
121.62.240.5	AS4134 CHINANET-BACKBONE	`2.51ms` from Wuhan, CN
3.232.163.85	AS14618 Amazon.com, Inc.	`0.53ms` from Ashburn, US
73.212.107.21	AS7922 Comcast Cable Communications, LLC	`7.69ms` from Ashburn, US
89.192.166.181	AS8011 MongoDB, Inc.	`0.49ms` from Ashburn, US
181.53.71.133	AS14080 Telmex Colombia S.A.	`1.01ms` from Bogota, CO
179.36.183.5	AS22927 Telefonica de Argentina	`2.37ms` from Buenos Aires, AR

Traceroute

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

traceroute -a -n -q1 -f4 -m9 172.56.108.140

traceroute to 172.56.108.140 (172.56.108.140): 9 hops max, 52 byte packets

4 [AS63949] 173.255.239.102 0.57 ms

5 [AS20940] 23.203.154.42 0.887 ms

6 [AS21928] 66.94.0.84 3.881 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Morris Plains, US

On December 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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