172.56.138.0/24

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 172.56.138.0/24

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

1 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
172.56.138.65	AS21928 T-Mobile USA, Inc.	`2.62ms` from Los Angeles, US

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
23.77.251.24	AS16625 Akamai Technologies, Inc.	`0.22ms` from Copenhagen, DK
174.92.240.184	AS577 Bell Canada	`3.38ms` from Montreal, CA
198.143.23.216	AS10753 Level 3 Parent, LLC	`1.99ms` from New York City, US
138.128.164.120	AS33182 HostDime.com, Inc.	`0.18ms` from Orlando, US
78.28.229.40	AS5518 SIA Tet	`0.93ms` from Riga, LV
73.35.179.168	AS7922 Comcast Cable Communications, LLC	`1.23ms` from Seattle, US
18.253.101.168	AS8987 Amazon Data Services Ireland Ltd	`0.83ms` from Columbus, US
214.78.1.232	AS5972 United States Department of Defense (DoD)	`10.79ms` from Dallas, US
63.181.155.216	AS16509 Amazon.com, Inc.	`0.14ms` from Frankfurt am Main, DE
58.79.236.232	AS3786 LG DACOM Corporation	`1.67ms` from Incheon, KR
12.67.74.72	AS7018 AT&T Enterprises, LLC	`1.03ms` from Kansas City, US
202.184.79.40	AS9930 TTNET-MY	`1.78ms` from Kuala Lumpur, MY
37.134.225.104	AS12479 Orange Espagne SA	`1.75ms` from Madrid, ES
195.24.64.152	AS48287 JSC RU-CENTER	`1.49ms` from Moscow, RU
177.10.210.168	AS262856 Mil Negócios LTDA.	`8.78ms` from Novo Hamburgo, BR
92.126.19.248	AS12389 PJSC Rostelecom	`5.56ms` from Novosibirsk, RU
20.63.208.184	AS8075 Microsoft Corporation	`0.34ms` from Osaka, JP
54.67.62.72	AS16509 Amazon.com, Inc.	`0.17ms` from San Jose, US
142.250.69.184	AS15169 Google LLC	`0.11ms` from Seattle, US
126.71.55.168	AS17676 SoftBank Corp.	`3.63ms` from Tokyo, JP
165.16.106.168	AS37284 Aljeel Aljadeed For Technology	`0.26ms` from Tripoli, LY
54.205.7.184	AS14618 Amazon.com, Inc.	`0.53ms` from Ashburn, US
44.222.78.56	AS14618 Amazon.com, Inc.	`0.76ms` from Ashburn, US
60.226.204.200	AS1221 Telstra Limited	`3.09ms` from Brisbane, AU
103.191.140.56	AS137817 KGISL Trust	`9.73ms` from Chennai, IN

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 172.56.138.65

traceroute to 172.56.138.65 (172.56.138.65): 64 hops max, 52 byte packets

1 [AS15169] 142.251.49.148 0.66 ms

2 [AS15169] 108.170.248.44 0.883 ms

3 *

4 *

5 *

6 *

7 [AS21928] 172.56.138.65 2.638 ms

Measurement taken from

IPinfo ProbeNet in Los Angeles, US

On March 13th 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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