172.56.166.0/23

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:        abuse@t-mobile.com
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

Overlapping Ranges

BGP prefixes that contain 172.56.166.0/23

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 2 domain names hosted across 2 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
172.56.166.200	mattlikes.men	1
172.56.166.175	packetsnbits.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
24.253.155.215	AS22773 Cox Communications Inc.	`8.83ms` from Ashburn, US
119.52.105.231	AS4837 CHINA UNICOM China169 Backbone	`8.75ms` from Changchun, CN
129.229.97.247	AS668 United States Department of Defense (DoD)	`4.19ms` from Chicago, US
128.203.219.167	AS8075 Microsoft Corporation	`0.16ms` from Des Moines, US
59.36.229.23	AS4134 CHINANET-BACKBONE	`3.75ms` from Guangzhou, CN
60.19.216.247	AS4837 CHINA UNICOM China169 Backbone	`7.84ms` from Liaoyang, CN
66.44.54.23	AS6079 RCN	`6.31ms` from Manassas, US
116.240.109.87	AS9443 Vocus Retail	`1.69ms` from Melbourne, AU
195.154.171.247	AS12876 Scaleway SAS	`0.46ms` from Paris, FR
58.20.17.87	AS4837 CHINA UNICOM China169 Backbone	`3.25ms` from Changsha, CN
69.131.119.103	AS4181 TDS TELECOM	`15.40ms` from Chicago, US
99.73.137.103	AS7018 AT&T Enterprises, LLC	`3.84ms` from Chicago, US
174.61.118.199	AS7922 Comcast Cable Communications, LLC	`4.60ms` from Miami, US
34.158.170.135	AS396982 Google LLC	`0.13ms` from Oudeschip, NL
187.73.156.231	AS268976 Weclix Telecom S/A	`2.13ms` from Sao Jose do Rio Preto, BR
23.210.98.71	AS16625 Akamai Technologies, Inc.	`0.17ms` from Singapore, SG
219.164.60.119	AS4713 NTT DOCOMO BUSINESS,Inc.	`16.98ms` from Tokyo, JP
89.193.168.7	AS8011 MongoDB, Inc.	`0.41ms` from Ashburn, US
54.230.237.71	AS16509 Amazon.com, Inc.	`0.55ms` from Bangkok, TH
101.75.37.199	AS4837 CHINA UNICOM China169 Backbone	`9.03ms` from Beijing, CN
198.145.164.215	AS6079 RCN	`0.59ms` from Boston, US
176.170.166.55	AS5410 Bouygues Telecom SA	`8.49ms` from Frankfurt am Main, DE
31.120.61.55	AS2856 British Telecommunications PLC	`2.24ms` from London, GB
62.158.6.71	AS3320 Deutsche Telekom AG	`8.28ms` from Nuernberg, DE
217.94.146.55	AS3320 Deutsche Telekom AG	`8.67ms` from Nuernberg, DE

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 172.56.166.55

traceroute to 172.56.166.55 (172.56.166.55): 7 hops max, 52 byte packets

4 [AS21928] 100.199.0.57 0.07 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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