172.56.204.0/23

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 172.56.204.0/23

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 are no domains currently hosted on this ASN.

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
92.253.73.247	AS8376 Jordan Data Communications Company LLC	`1.47ms` from Amman, JO
107.210.112.71	AS7018 AT&T Enterprises, LLC	`6.21ms` from Atlanta, US
80.134.212.39	AS3320 Deutsche Telekom AG	`4.24ms` from Berlin, DE
116.117.33.199	AS4837 CHINA UNICOM China169 Backbone	`13.90ms` from Changchun, CN
71.228.34.167	AS7922 Comcast Cable Communications, LLC	`5.75ms` from Chicago, US
42.191.89.183	AS4788 TM TECHNOLOGY SERVICES SDN. BHD.	`7.76ms` from Kuala Lumpur, MY
86.150.126.183	AS2856 British Telecommunications PLC	`6.37ms` from London, GB
60.153.247.215	AS17676 SoftBank Corp.	`4.07ms` from Osaka, JP
44.223.200.183	AS14618 Amazon.com, Inc.	`0.22ms` from Reston, US
122.35.231.167	AS17858 LG POWERCOMM	`1.56ms` from Seoul, KR
14.49.82.135	AS4766 Korea Telecom	`6.33ms` from Seoul, KR
13.213.157.247	AS16509 Amazon.com, Inc.	`0.10ms` from Singapore, SG
62.166.183.199	AS50266 Odido Netherlands B.V.	`9.01ms` from Amsterdam, NL
197.36.88.39	AS8452 TE-AS	`3.98ms` from Cairo, EG
45.36.75.199	AS11426 Charter Communications Inc	`9.04ms` from Charlotte, US
35.222.241.167	AS396982 Google LLC	`0.11ms` from Council Bluffs, US
79.152.202.167	AS3352 TELEFONICA DE ESPANA S.A.U.	`8.28ms` from Madrid, ES
79.22.201.103	AS3269 Telecom Italia S.p.A.	`6.19ms` from Milan, IT
74.125.146.55	AS15169 Google LLC	`0.16ms` from Santiago, CL
51.79.31.119	AS16276 OVH SAS	`0.09ms` from Beauharnois, CA
51.137.183.119	AS8075 Microsoft Corporation	`0.19ms` from Cardiff, GB
97.243.227.103	AS6167 Verizon Business	`12.17ms` from Chicago, US
54.195.211.215	AS16509 Amazon.com, Inc.	`0.19ms` from Dublin, IE
156.249.153.87	AS9304 HGC Global Communications Limited	`2.92ms` from Hong Kong, HK
97.90.137.151	AS20115 Charter Communications LLC	`3.29ms` from Los Angeles, US

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 172.56.204.222

traceroute to 172.56.204.222 (172.56.204.222): 7 hops max, 52 byte packets

4 [AS21928] 100.199.0.93 0.092 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Tieling, CN

On March 22nd 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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