172.56.42.0/23

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 172.56.42.0/23

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 is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
172.56.42.30	burrowshouse.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
4.175.212.7	AS8075 Microsoft Corporation	`0.21ms` from Amsterdam, NL
73.171.33.71	AS7922 Comcast Cable Communications, LLC	`6.73ms` from Ashburn, US
104.197.159.183	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
47.183.194.39	AS5650 Frontier Communications of America, Inc.	`1.64ms` from Dallas, US
209.172.201.151	AS62 CyrusOne LLC	`5.78ms` from Dallas, US
76.203.37.247	AS7018 AT&T Enterprises, LLC	`2.76ms` from Houston, US
95.57.3.103	AS9198 JSC Kazakhtelecom	`7.70ms` from Karagandy, KZ
80.192.45.231	AS5089 Virgin Media Limited	`8.08ms` from London, GB
220.107.125.71	AS4713 NTT DOCOMO BUSINESS,Inc.	`12.20ms` from Osaka, JP
119.191.22.231	AS4837 CHINA UNICOM China169 Backbone	`3.39ms` from Qingdao, CN
111.248.31.103	AS3462 Data Communication Business Group	`1.86ms` from Taipei, TW
220.141.210.87	AS3462 Data Communication Business Group	`1.10ms` from Taipei, TW
54.249.210.55	AS16509 Amazon.com, Inc.	`0.20ms` from Tokyo, JP
41.230.128.39	AS37705 TOPNET	`2.16ms` from Tunis, TN
121.89.180.23	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`0.85ms` from Zhangjiakou, CN
174.140.122.87	AS11776 Breezeline	`15.59ms` from Ashburn, US
66.31.54.247	AS7922 Comcast Cable Communications, LLC	`4.87ms` from Boston, US
76.130.54.23	AS7922 Comcast Cable Communications, LLC	`3.19ms` from Denver, US
189.137.194.23	AS8151 UNINET	`4.30ms` from Guadalajara, MX
187.32.138.71	AS16735 ALGAR TELECOM S/A	`0.85ms` from Osasco, BR
78.113.91.231	AS15557 Societe Francaise Du Radiotelephone - SFR SA	`14.33ms` from Paris, FR
42.96.185.55	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`0.35ms` from Qingdao, CN
41.140.121.71	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`11.84ms` from Rabat, MA
187.172.40.119	AS8151 UNINET	`17.63ms` from Santiago de Queretaro, MX
58.38.50.247	AS4812 China Telecom (Group)	`3.57ms` from Shanghai, CN

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 172.56.43.179

traceroute to 172.56.43.179 (172.56.43.179): 7 hops max, 52 byte packets

4 [AS21928] 100.199.0.57 0.074 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Liuzhou, CN

On March 14th 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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