172.56.136.0/23

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:        2025-01-09
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 172.56.136.0/23

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
128.160.25.199	AS668 United States Department of Defense (DoD)	`0.52ms` from Atlanta, US
194.176.241.71	AS5483 Magyar Telekom Plc.	`10.21ms` from Budapest, HU
24.12.24.247	AS7922 Comcast Cable Communications, LLC	`5.90ms` from Chicago, US
34.45.240.103	AS396982 Google LLC	`0.11ms` from Council Bluffs, US
98.55.56.23	AS7922 Comcast Cable Communications, LLC	`15.15ms` from Denver, US
201.166.182.23	AS7438 PEGASO PCS	`9.25ms` from Monterrey, MX
13.232.69.183	AS16509 Amazon.com, Inc.	`0.16ms` from Mumbai, IN
73.254.90.55	AS7922 Comcast Cable Communications, LLC	`13.06ms` from Seattle, US
146.87.3.71	AS786 Jisc Services Limited	`4.26ms` from Sheffield, GB
166.193.116.7	AS20057 AT&T Enterprises, LLC	`3.56ms` from Ashburn, US
52.42.32.71	AS16509 Amazon.com, Inc.	`0.17ms` from Boardman, US
105.76.146.215	AS36884 Wana Corporate	`10.98ms` from Casablanca, MA
34.243.177.103	AS16509 Amazon.com, Inc.	`0.16ms` from Dublin, IE
34.252.178.23	AS16509 Amazon.com, Inc.	`0.13ms` from Dublin, IE
176.199.134.23	AS3209 Vodafone GmbH	`7.70ms` from Duesseldorf, DE
152.26.20.119	AS81 MCNC	`10.51ms` from Herndon, US
83.216.161.87	AS21309 HERABIT S.p.A.	`9.80ms` from Milan, IT
107.3.223.199	AS7922 Comcast Cable Communications, LLC	`13.76ms` from Murfreesboro, US
154.242.58.183	AS36947 Telecom Algeria	`13.18ms` from Palermo, IT
64.167.233.23	AS7018 AT&T Enterprises, LLC	`4.20ms` from Redding, US
151.53.167.231	AS1267 WIND TRE S.P.A.	`4.80ms` from Rome, IT
190.139.216.167	AS7303 Telecom Argentina S.A.	`2.68ms` from Rosario, AR
101.124.2.215	AS23724 IDC, China Telecommunications Corporation	`3.44ms` from Tianjin, CN
111.178.37.151	AS4134 CHINANET-BACKBONE	`2.42ms` from Wuhan, CN
132.183.196.231	AS40831 Mass General Brigham Incorporated	`10.94ms` from Ashburn, US

Traceroute

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

traceroute -a -n -q1 -m5 172.56.137.130

traceroute to 172.56.137.130 (172.56.137.130): 5 hops max, 52 byte packets

1 [AS31898] 140.91.236.16 0.066 ms

2 [AS15802] 91.74.125.162 0.987 ms

3 *

4 *

5 *

Measurement taken from

IPinfo ProbeNet in Dubai, AE

On December 6th 2025

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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