172.56.168.0/21

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 172.56.168.0/21

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 3 domain names hosted across 3 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
103.185.104.165	AS149560 AAYOG NETWORK PVT LTD	`1.75ms` from Bengaluru, IN
209.6.245.117	AS6079 RCN	`4.05ms` from Boston, US
216.115.191.5	AS62722 Central States Southeast and Southwest Areas Health and Welfare and Pension Funds	`1.06ms` from Chicago, US
84.178.49.101	AS3320 Deutsche Telekom AG	`4.57ms` from Duesseldorf, DE
92.32.246.197	AS8434 Telenor Sverige AB	`0.47ms` from Goeteborg, SE
46.46.68.197	AS48045 TOV "Flagman Telecom"	`8.30ms` from Kyiv, UA
73.65.29.165	AS7922 Comcast Cable Communications, LLC	`6.82ms` from Minneapolis, US
188.254.83.197	AS12389 PJSC Rostelecom	`0.38ms` from Moscow, RU
77.51.24.85	AS12389 PJSC Rostelecom	`1.50ms` from Moscow, RU
67.245.56.69	AS12271 Charter Communications Inc	`7.04ms` from New York City, US
180.58.16.133	AS4713 NTT DOCOMO BUSINESS,Inc.	`1.15ms` from Osaka, JP
43.157.174.213	AS132203 Tencent Building, Kejizhongyi Avenue	`0.50ms` from Sao Paulo, BR
54.180.31.117	AS16509 Amazon.com, Inc.	`0.79ms` from Seoul, KR
124.220.5.213	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.47ms` from Shanghai, CN
83.166.63.165	AS3249 Telia Eesti AS	`6.41ms` from Tallinn, EE
209.5.228.5	AS812 Rogers Communications Canada Inc.	`0.60ms` from Toronto, CA
99.224.155.69	AS812 Rogers Communications Canada Inc.	`3.23ms` from Toronto, CA
217.119.232.149	AS16350 Root Holding B.V.	`2.30ms` from Amsterdam, NL
47.48.153.149	AS20115 Charter Communications LLC	`9.06ms` from Atlanta, US
66.70.236.5	AS16276 OVH SAS	`0.10ms` from Beauharnois, CA
71.184.247.5	AS701 Verizon Business	`1.65ms` from Boston, US
134.204.109.5	AS16504 Granite Telecommunications LLC	`0.81ms` from Chicago, US
203.94.35.5	AS55850 Mercury NZ Limited	`1.54ms` from Christchurch, NZ
97.155.63.37	AS6167 Verizon Business	`19.67ms` from Dallas, US
218.204.241.69	AS9808 China Mobile Communications Group Co., Ltd.	`4.17ms` from Guangzhou, CN

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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