172.56.216.0/21

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 172.56.216.0/21

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 10 domain names hosted across 15 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP

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
97.223.242.53	AS6167 Verizon Business	`11.45ms` from Chicago, US
87.36.75.197	AS1213 ASIERA TECHNOLOGY SERVICES CLG	`2.82ms` from Dublin, IE
86.145.246.213	AS2856 British Telecommunications PLC	`1.99ms` from Erith, GB
221.206.200.133	AS4837 CHINA UNICOM China169 Backbone	`6.37ms` from Harbin, CN
69.5.3.133	AS150436 Byteplus Pte. Ltd.	`0.81ms` from Jakarta, ID
197.243.115.245	AS37228 KT RWANDA NETWORK Ltd	`0.51ms` from Kigali, RW
23.190.112.5	AS22357 Secure Shores Data Center	`1.59ms` from Nassau, BS
189.7.132.117	AS28573 Claro NXT Telecomunicacoes Ltda	`8.83ms` from Porto Alegre, BR
75.198.152.245	AS6167 Verizon Business	`14.96ms` from San Jose, US
200.83.132.5	AS22047 VTR BANDA ANCHA S.A.	`12.59ms` from Santiago, CL
182.228.199.21	AS17858 LG POWERCOMM	`6.46ms` from Seoul, KR
153.195.206.181	AS4713 NTT DOCOMO BUSINESS,Inc.	`3.17ms` from Tokyo, JP
150.60.124.181	AS9597 KDDI Web Communications Inc.	`0.79ms` from Tokyo, JP
70.31.155.69	AS577 Bell Canada	`1.15ms` from Toronto, CA
94.240.37.69	AS47223 Lukman Multimedia Sp. z o.o	`0.33ms` from Warsaw, PL
80.90.160.5	AS48832 Jordanian mobile phone services Ltd	`1.37ms` from Amman, JO
77.170.233.85	AS1136 KPN B.V.	`3.93ms` from Amsterdam, NL
73.134.187.21	AS7922 Comcast Cable Communications, LLC	`6.93ms` from Ashburn, US
217.230.184.229	AS3320 Deutsche Telekom AG	`4.46ms` from Berlin, DE
182.239.78.101	AS9231 China Mobile Hong Kong Company Limited	`8.27ms` from Hong Kong, HK
1.226.227.21	AS9318 SK Broadband Co Ltd	`9.29ms` from Incheon, KR
154.117.107.117	AS37714 BITFLUX COMMUNICATIONS LIMITED	`16.31ms` from Lagos, NG
97.206.23.229	AS6167 Verizon Business	`8.65ms` from San Jose, US
180.228.21.21	AS17858 LG POWERCOMM	`2.17ms` from Seoul, KR
79.190.96.5	AS5617 Orange Polska Spolka Akcyjna	`5.83ms` from Warsaw, PL

Traceroute

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

traceroute -a -n -q1 -f4 -m7 172.56.217.181

traceroute to 172.56.217.181 (172.56.217.181): 7 hops max, 52 byte packets

4 [AS21928] 100.199.0.57 0.071 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Liuzhou, CN

On March 21st 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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