172.56.18.0/23

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 172.56.18.0/23

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
172.56.19.167	barbaretta.net	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
20.4.192.183	AS8075 Microsoft Corporation	`0.21ms` from Amsterdam, NL
221.222.47.39	AS4808 China Unicom Beijing Province Network	`3.93ms` from Beijing, CN
157.92.170.55	AS3449 Universidad Nacional de Buenos Aires	`1.57ms` from Buenos Aires, AR
92.45.167.55	AS34984 Superonline Iletisim Hizmetleri A.S.	`9.55ms` from Izmir, TR
187.111.202.199	AS53123 Power Telecomunicações Ltda. - ME	`13.78ms` from Joao Pessoa, BR
176.159.217.7	AS5410 Bouygues Telecom SA	`4.11ms` from Saint-Denis, FR
137.184.189.199	AS14061 DigitalOcean, LLC	`0.23ms` from Santa Clara, US
59.2.230.103	AS4766 Korea Telecom	`4.26ms` from Seoul, KR
1.96.223.39	AS4766 Korea Telecom	`1.85ms` from Seoul, KR
218.81.173.7	AS4812 China Telecom (Group)	`4.23ms` from Shanghai, CN
212.69.132.231	AS48031 Ivanov Vitaliy Sergeevich	`0.15ms` from Sofia, BG
90.235.255.119	AS3301 Telia Company AB	`14.98ms` from Stockholm, SE
52.69.189.199	AS16509 Amazon.com, Inc.	`0.21ms` from Tokyo, JP
24.77.102.231	AS6327 Shaw Communications	`3.71ms` from Winnipeg, CA
73.135.123.183	AS7922 Comcast Cable Communications, LLC	`9.02ms` from Ashburn, US
164.191.97.167	AS668 United States Department of Defense (DoD)	`0.62ms` from Atlanta, US
81.251.202.55	AS3215 Orange S.A.	`2.09ms` from Lyon, FR
101.141.142.55	AS17511 OPTAGE Inc.	`2.30ms` from Osaka, JP
98.171.85.215	AS22773 Cox Communications Inc.	`5.44ms` from Phoenix, US
112.246.61.135	AS4837 CHINA UNICOM China169 Backbone	`11.13ms` from Qingdao, CN
103.132.124.55	AS138124 Universitas Samudra	`19.33ms` from Singapore, SG
16.16.163.39	AS16509 Amazon.com, Inc.	`0.11ms` from Stockholm, SE
178.155.129.247	AS39642 Norlys Digital A/S	`11.94ms` from Tønder, DK
222.137.138.87	AS4837 CHINA UNICOM China169 Backbone	`2.37ms` from Zhengzhou, CN
77.60.187.135	AS1136 KPN B.V.	`2.55ms` from Amsterdam, NL

Traceroute

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

traceroute -a -n -q1 -f2 -m6 172.56.19.199

traceroute to 172.56.19.199 (172.56.19.199): 6 hops max, 52 byte packets

2 [] 84.17.33.142 215.579 ms

3 [] 138.199.0.107 0.165 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Los Angeles, 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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