172.56.176.0/21

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 172.56.176.0/21

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 3 domain names hosted across 3 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
109.177.194.165	AS5384 Emirates Internet	`3.87ms` from Al Fujairah City, AE
5.193.6.181	AS5384 Emirates Internet	`4.63ms` from Al Fujairah City, AE
179.61.144.21	AS43641 SOLLUTIUM EU Sp z.o.o.	`0.20ms` from Amsterdam, NL
100.49.52.69	AS14618 Amazon.com, Inc.	`0.48ms` from Ashburn, US
93.226.250.21	AS3320 Deutsche Telekom AG	`5.55ms` from Berlin, DE
74.103.242.101	AS701 Verizon Business	`1.92ms` from Boston, US
165.166.143.21	AS12208 TruVista Communications	`5.25ms` from Charlotte, US
217.249.202.197	AS3320 Deutsche Telekom AG	`7.79ms` from Frankfurt am Main, DE
193.183.119.5	AS34385 Tripnet AB	`0.64ms` from Goeteborg, SE
216.8.12.229	AS7672 Hokuden Information System Service Co.,Ltd.	`11.76ms` from Hiroshima, JP
4.191.78.37	AS8075 Microsoft Corporation	`0.30ms` from Hong Kong, HK
72.219.173.21	AS22773 Cox Communications Inc.	`6.08ms` from Los Angeles, US
89.29.208.229	AS3339 FIBRAWORLD TELECOM S.A.U.	`6.82ms` from Madrid, ES
37.152.147.149	AS57970 OLE COMUNICACION S.L.	`8.24ms` from Madrid, ES
58.240.113.149	AS4837 CHINA UNICOM China169 Backbone	`2.01ms` from Nanjing, CN
79.233.102.181	AS3320 Deutsche Telekom AG	`2.32ms` from Nuernberg, DE
151.15.92.37	AS1267 WIND TRE S.P.A.	`3.47ms` from Rome, IT
179.97.107.197	AS28601 UNIVERSIDADE DO ESTADO DE SANTA CATARINA	`17.62ms` from Sao Paulo, BR
186.249.139.21	AS28649 Desktop Sigmanet Comunicação Multimídia SA	`2.13ms` from Sao Paulo, BR
175.194.232.69	AS4766 Korea Telecom	`1.90ms` from Seoul, KR
27.121.6.21	AS10010 TOKAI Communications Corporation	`0.63ms` from Tokyo, JP
20.56.124.165	AS8075 Microsoft Corporation	`0.37ms` from Amsterdam, NL
71.71.81.117	AS11426 Charter Communications Inc	`5.01ms` from Charlotte, US
122.179.214.165	AS24560 Bharti Airtel Ltd., Telemedia Services	`10.69ms` from Chennai, IN
112.127.175.181	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`4.61ms` from Hangzhou, 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 -m10 172.56.177.212

traceroute to 172.56.177.212 (172.56.177.212): 10 hops max, 52 byte packets

4 [AS63949] 173.230.159.133 10.764 ms

5 [AS20940] 23.203.158.50 0.585 ms

6 [AS20940] 23.207.232.33 0.684 ms

7 [AS21928] 66.94.0.36 10.611 ms

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Measurement taken from

IPinfo ProbeNet in Santa Clara, US

On March 20th 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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