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:        [email protected]
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:        [email protected]
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
36.134.192.167	AS9808 China Mobile Communications Group Co., Ltd.	`0.46ms` from Chengdu, CN
113.206.19.231	AS4837 CHINA UNICOM China169 Backbone	`1.85ms` from Chongqing, CN
67.190.21.231	AS7922 Comcast Cable Communications, LLC	`2.58ms` from Denver, US
94.114.162.39	AS3209 Vodafone GmbH	`8.82ms` from Frankfurt am Main, DE
154.195.156.199	AS62240 Clouvider	`0.27ms` from Frankfurt am Main, DE
88.29.138.39	AS3352 TELEFONICA DE ESPANA S.A.U.	`16.44ms` from Madrid, ES
103.7.152.7	AS15830 Equinix (EMEA) Acquisition Enterprises B.V.	`1.14ms` from Tokyo, JP
182.171.3.183	AS2527 Sony Network Communications Inc.	`2.34ms` from Tokyo, JP
170.130.134.215	AS62904 Eonix Corporation	`0.49ms` from Dallas, US
65.71.73.135	AS7018 AT&T Enterprises, LLC	`1.00ms` from Dallas, US
115.236.96.7	AS58461 CT-HangZhou-IDC	`5.63ms` from Hangzhou, CN
31.195.108.55	AS3269 Telecom Italia S.p.A.	`4.77ms` from Milan, IT
36.163.112.103	AS56046 China Mobile communications corporation	`6.49ms` from Nanjing, CN
81.249.31.23	AS3215 Orange S.A.	`6.83ms` from Paris, FR
181.220.26.247	AS28573 Claro NXT Telecomunicacoes Ltda	`10.23ms` from Porto Alegre, BR
111.4.108.151	AS9808 China Mobile Communications Group Co., Ltd.	`7.89ms` from Wuhan, CN
161.189.128.71	AS135629 Ningxia West Cloud Data Technology Co.Ltd.	`0.46ms` from Zhongwei, CN
188.155.63.103	AS6730 Sunrise GmbH	`0.96ms` from Zuerich, CH
18.246.113.247	AS16509 Amazon.com, Inc.	`0.69ms` from Boardman, US
190.51.146.167	AS22927 Telefonica de Argentina	`2.08ms` from Buenos Aires, AR
112.15.194.23	AS56041 China Mobile communications corporation	`6.99ms` from Hangzhou, CN
36.80.227.151	AS7713 PT Telekomunikasi Indonesia	`1.61ms` from Jakarta, ID
124.29.217.39	AS9541 Cyber Internet Services (Pvt) Ltd.	`17.28ms` from Karachi, PK
111.43.124.151	AS132525 HeiLongJiang Mobile Communication Company Limited	`19.22ms` from Liaoyang, CN
86.58.114.71	AS3212 Telemach Slovenija d.o.o.	`1.03ms` from Ljubljana, SI

Traceroute

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

traceroute -a -n -q1 -m6 172.56.39.20

traceroute to 172.56.39.20 (172.56.39.20): 6 hops max, 52 byte packets

1 [AS31898] 140.204.222.216 0.18 ms

2 [AS21928] 66.94.0.89 0.6 ms

3 [AS21928] 66.94.0.88 0.576 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Ashburn, US

On November 28th 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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