172.56.174.0/23

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 172.56.174.0/23

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
137.117.232.39	AS8075 Microsoft Corporation	`0.26ms` from Amsterdam, NL
54.89.130.87	AS14618 Amazon.com, Inc.	`0.52ms` from Ashburn, US
90.69.16.215	AS12479 Orange Espagne SA	`4.24ms` from Madrid, ES
5.175.120.135	AS12389 PJSC Rostelecom	`17.70ms` from Moscow, RU
114.161.241.119	AS4713 NTT DOCOMO BUSINESS,Inc.	`4.88ms` from Osaka, JP
89.3.26.247	AS15557 Societe Francaise Du Radiotelephone - SFR SA	`8.10ms` from Paris, FR
123.135.159.103	AS4837 CHINA UNICOM China169 Backbone	`5.60ms` from Qingdao, CN
115.86.194.135	AS17598 LG HelloVision Corp.	`2.86ms` from Seoul, KR
60.76.203.71	AS17676 SoftBank Corp.	`2.63ms` from Tokyo, JP
69.157.112.7	AS577 Bell Canada	`3.37ms` from Toronto, CA
107.21.185.7	AS14618 Amazon.com, Inc.	`0.53ms` from Ashburn, US
66.202.4.183	AS7029 Windstream Communications LLC	`10.35ms` from Chicago, US
141.83.112.119	AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.	`1.77ms` from Hamburg, DE
73.6.139.167	AS7922 Comcast Cable Communications, LLC	`7.92ms` from Houston, US
149.36.239.71	AS174 Cogent Communications, LLC	`0.55ms` from Madrid, ES
187.150.140.103	AS8151 UNINET	`12.33ms` from Miami, US
24.44.230.87	AS6128 Cablevision Systems Corp.	`3.39ms` from New York City, US
179.104.110.167	AS53006 ALGAR TELECOM S/A	`6.33ms` from Osasco, BR
58.224.145.23	AS9318 SK Broadband Co Ltd	`1.55ms` from Seoul, KR
121.103.9.87	AS2527 Sony Network Communications Inc.	`2.31ms` from Tokyo, JP
52.178.98.7	AS8075 Microsoft Corporation	`0.23ms` from Amsterdam, NL
100.22.87.71	AS16509 Amazon.com, Inc.	`0.17ms` from Boardman, US
4.152.177.87	AS8075 Microsoft Corporation	`0.29ms` from Boydton, US
34.253.155.103	AS16509 Amazon.com, Inc.	`0.17ms` from Dublin, IE
217.81.83.199	AS3320 Deutsche Telekom AG	`5.31ms` 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 -f2 -m9 172.56.175.143

traceroute to 172.56.175.143 (172.56.175.143): 9 hops max, 52 byte packets

2 [AS20278] 64.44.164.129 0.136 ms

3 *

4 *

5 *

6 [AS174] 154.54.40.110 13.632 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Jacksonville, US

On March 20th 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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