172.56.64.0/21

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 172.56.64.0/21

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 14 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

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
3.220.109.101	AS14618 Amazon.com, Inc.	`0.43ms` from Ashburn, US
35.245.112.21	AS396982 Google LLC	`0.12ms` from Ashburn, US
20.231.56.101	AS8075 Microsoft Corporation	`0.48ms` from Ashburn, US
207.250.77.149	AS3549 Level 3 Parent, LLC	`0.52ms` from Charlotte, US
135.134.123.101	AS4181 TDS TELECOM	`5.48ms` from Chicago, US
177.157.43.181	AS18881 TELEFÔNICA BRASIL S.A	`12.82ms` from Curitiba, BR
46.236.231.5	AS61244 Manfred Casper trading as EURO-SAT	`4.71ms` from Frankfurt am Main, DE
173.197.111.197	AS20001 Charter Communications Inc	`6.66ms` from Honolulu, US
223.222.232.21	AS17849 SK Broadband Co Ltd	`2.88ms` from Incheon, KR
78.169.231.5	AS9121 Turk Telekomunikasyon Anonim Sirketi	`11.61ms` from Istanbul, TR
18.169.164.117	AS16509 Amazon.com, Inc.	`0.20ms` from London, GB
162.236.164.101	AS7018 AT&T Enterprises, LLC	`2.01ms` from Miami, US
151.67.222.213	AS1267 WIND TRE S.P.A.	`4.83ms` from Milan, IT
13.200.64.181	AS16509 Amazon.com, Inc.	`0.14ms` from Mumbai, IN
213.166.201.133	AS12727 Vialis SEM	`7.17ms` from Paris, FR
187.36.34.181	AS28573 Claro NXT Telecomunicacoes Ltda	`4.37ms` from Porto Alegre, BR
189.125.84.245	AS3549 Level 3 Parent, LLC	`0.62ms` from Porto Alegre, BR
176.74.148.5	AS35613 FASTER CZ spol. s r.o.	`4.80ms` from Prague, CZ
101.81.118.133	AS4812 China Telecom (Group)	`5.85ms` from Shanghai, CN
186.217.133.37	AS53166 UNIVERSIDADE ESTADUAL PAULISTA	`7.25ms` from São Paulo, BR
221.113.67.117	AS4685 Asahi Net	`2.70ms` from Tokyo, JP
100.26.86.21	AS14618 Amazon.com, Inc.	`0.51ms` from Ashburn, US
44.238.48.213	AS16509 Amazon.com, Inc.	`0.21ms` from Boardman, US
41.36.165.181	AS8452 TE-AS	`4.37ms` from Cairo, EG
47.71.60.5	AS3209 Vodafone GmbH	`17.80ms` from Frankfurt am Main, DE

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 172.56.69.57

traceroute to 172.56.69.57 (172.56.69.57): 7 hops max, 52 byte packets

4 [AS21928] 100.199.0.93 0.078 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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