172.56.238.0/23

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 172.56.238.0/23

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 is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
172.56.238.82	testingjohnross.com	1

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
51.81.61.71	AS16276 OVH SAS	`1.25ms` from Ashburn, US
39.97.209.199	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`2.04ms` from Beijing, CN
188.228.91.7	AS214875 Altibox Danmark AS	`5.65ms` from Copenhagen, DK
75.77.135.87	AS7029 Windstream Communications LLC	`1.30ms` from Miami, US
211.178.16.39	AS9318 SK Broadband Co Ltd	`0.98ms` from Seoul, KR
175.171.166.167	AS4837 CHINA UNICOM China169 Backbone	`8.13ms` from Tieling, CN
4.153.102.135	AS8075 Microsoft Corporation	`0.19ms` from Boydton, US
50.2.118.39	AS62904 Eonix Corporation	`1.17ms` from Dallas, US
18.203.71.247	AS16509 Amazon.com, Inc.	`0.17ms` from Dublin, IE
82.24.224.199	AS30860 Virtual Systems LLC	`0.43ms` from Kyiv, UA
158.125.234.87	AS786 Jisc Services Limited	`5.02ms` from London, GB
75.102.24.103	AS13768 Aptum Technologies	`0.09ms` from Los Angeles, US
79.154.76.55	AS3352 TELEFONICA DE ESPANA S.A.U.	`8.41ms` from Madrid, ES
219.211.209.215	AS17676 SoftBank Corp.	`3.80ms` from Osaka, JP
51.120.77.71	AS8075 Microsoft Corporation	`0.62ms` from Oslo, NO
34.234.122.119	AS14618 Amazon.com, Inc.	`0.17ms` from Reston, US
193.252.56.23	AS3215 Orange S.A.	`1.97ms` from Saint-Denis, FR
35.247.164.183	AS396982 Google LLC	`0.14ms` from Singapore, SG
164.126.160.199	AS39603 P4 Sp. z o.o.	`5.77ms` from Warsaw, PL
192.68.157.7	AS397402 Atrius Health, Inc.	`1.35ms` from Boston, US
20.118.252.39	AS8075 Microsoft Corporation	`0.20ms` from Des Moines, US
18.203.228.55	AS16509 Amazon.com, Inc.	`0.19ms` from Dublin, IE
194.35.189.71	AS9063 VSE NET GmbH	`4.32ms` from Frankfurt am Main, DE
81.187.165.151	AS20712 Andrews & Arnold Ltd	`3.13ms` from London, GB
83.40.45.231	AS3352 TELEFONICA DE ESPANA S.A.U.	`10.69ms` from Madrid, ES

Traceroute

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

traceroute -a -n -q1 -f6 -m9 172.56.238.224

traceroute to 172.56.238.224 (172.56.238.224): 9 hops max, 52 byte packets

6 [AS6453] 180.87.38.5 4.506 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Mumbai, IN

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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