172.56.38.0/23

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:      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


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

Overlapping Ranges

BGP prefixes that contain 172.56.38.0/23

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
130.35.191.183	AS31898 Oracle Corporation	`1.05ms` from Ashburn, US
75.22.30.247	AS7018 AT&T Enterprises, LLC	`2.02ms` from Dallas, US
80.220.178.151	AS1759 Telia Finland Oyj	`0.88ms` from Helsinki, FI
78.151.125.135	AS13285 TalkTalk Communications Limited	`1.39ms` from London, GB
35.179.28.247	AS16509 Amazon.com, Inc.	`0.20ms` from London, GB
69.9.207.199	AS11232 Midcontinent Communications	`0.18ms` from Minneapolis, US
118.212.61.183	AS4837 CHINA UNICOM China169 Backbone	`4.25ms` from Nanchang, CN
112.1.28.23	AS56046 China Mobile communications corporation	`4.67ms` from Nanjing, CN
104.225.253.87	AS16276 OVH SAS	`0.17ms` from Singapore, SG
140.114.193.167	AS18047 National Tsing-Hua University	`2.41ms` from Taipei, TW
14.14.9.87	AS131927 TV Matsumoto Cablevision	`4.30ms` from Tokyo, JP
13.159.26.231	AS16509 Amazon.com, Inc.	`0.21ms` from Tokyo, JP
124.211.226.183	AS2516 KDDI CORPORATION	`3.21ms` from Tokyo, JP
4.215.202.103	AS8075 Microsoft Corporation	`0.13ms` from Tokyo, JP
124.44.205.71	AS9595 NTT-ME Corporation	`3.29ms` from Tokyo, JP
94.31.238.71	AS12389 PJSC Rostelecom	`1.12ms` from Yekaterinburg, RU
42.233.148.71	AS4837 CHINA UNICOM China169 Backbone	`6.74ms` from Zhengzhou, CN
77.175.181.151	AS1136 KPN B.V.	`3.04ms` from Amsterdam, NL
52.5.187.135	AS14618 Amazon.com, Inc.	`0.49ms` from Ashburn, US
3.19.94.23	AS16509 Amazon.com, Inc.	`0.13ms` from Columbus, US
174.16.182.167	AS209 CenturyLink Communications, LLC	`1.75ms` from Denver, US
217.93.196.23	AS3320 Deutsche Telekom AG	`3.80ms` from Duesseldorf, DE
176.57.138.23	AS56876 Ociris GmbH	`0.25ms` from Frankfurt am Main, DE
111.230.143.55	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.96ms` from Guangzhou, CN
223.18.242.151	AS9304 HGC Global Communications Limited	`1.72ms` from Hong Kong, HK

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 172.56.38.44

traceroute to 172.56.38.44 (172.56.38.44): 7 hops max, 52 byte packets

4 [AS21928] 100.199.0.93 0.09 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Tieling, 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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