172.56.120.0/21

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:        2026-01-08
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

Overlapping Ranges

BGP prefixes that contain 172.56.120.0/21

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 7 domain names hosted across 6 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP

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
77.172.94.21	AS1136 KPN B.V.	`2.88ms` from Amsterdam, NL
74.234.166.5	AS8075 Microsoft Corporation	`1.34ms` from Amsterdam, NL
71.204.118.21	AS7922 Comcast Cable Communications, LLC	`5.43ms` from Atlanta, US
98.220.26.165	AS7922 Comcast Cable Communications, LLC	`11.87ms` from Chicago, US
24.106.241.213	AS10796 Charter Communications Inc	`3.53ms` from Columbus, US
158.95.140.21	AS55256 Netskope Inc	`0.21ms` from Frankfurt am Main, DE
90.1.66.37	AS3215 Orange S.A.	`7.16ms` from Marseille, FR
79.19.104.37	AS3269 Telecom Italia S.p.A.	`8.53ms` from Rende, IT
170.39.36.69	AS398437 Hot Springs Telephone Company	`13.51ms` from Seattle, US
91.242.138.213	AS48427 VISOVISION S.L.	`1.76ms` from Sevilla, ES
180.157.210.117	AS4812 China Telecom (Group)	`3.88ms` from Shanghai, CN
126.70.254.149	AS17676 SoftBank Corp.	`2.68ms` from Tokyo, JP
99.138.131.21	AS7018 AT&T Enterprises, LLC	`7.13ms` from Atlanta, US
61.137.12.229	AS4134 CHINANET-BACKBONE	`1.73ms` from Changsha, CN
96.11.227.165	AS10796 Charter Communications Inc	`1.71ms` from Cleveland, US
54.194.32.69	AS16509 Amazon.com, Inc.	`0.17ms` from Dublin, IE
93.230.146.165	AS3320 Deutsche Telekom AG	`7.42ms` from Frankfurt am Main, DE
219.79.55.181	AS4760 HKT Limited	`7.74ms` from Hong Kong, HK
110.172.101.101	AS45996 DAOU TECHNOLOGY	`0.92ms` from Incheon, KR
114.5.84.101	AS4761 INDOSAT Internet Network Provider	`13.67ms` from Jakarta, ID
109.149.197.69	AS2856 British Telecommunications PLC	`5.15ms` from London, GB
159.183.122.245	AS11377 SendGrid, Inc.	`6.29ms` from Los Angeles, US
23.203.47.101	AS20940 Akamai International B.V.	`0.71ms` from Los Angeles, US
104.206.82.37	AS62904 Eonix Corporation	`0.26ms` from New York City, US
143.107.186.53	AS28571 UNIVERSIDADE DE SAO PAULO	`8.42ms` from Osasco, BR

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 172.56.127.67

traceroute to 172.56.127.67 (172.56.127.67): 7 hops max, 52 byte packets

4 [AS21928] 100.199.0.93 0.149 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Tieling, CN

On March 21st 2026

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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