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 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

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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
65.190.167.55	AS11426 Charter Communications Inc	`11.67ms` from Ashburn, US
108.226.129.199	AS7018 AT&T Enterprises, LLC	`1.92ms` from Atlanta, US
80.133.117.167	AS3320 Deutsche Telekom AG	`3.83ms` from Berlin, DE
97.224.92.119	AS6167 Verizon Business	`12.71ms` from Chicago, US
107.193.168.119	AS7018 AT&T Enterprises, LLC	`7.98ms` from Chicago, US
194.6.236.151	AS8434 Telenor Sverige AB	`1.09ms` from Goeteborg, SE
116.102.242.7	AS7552 Viettel Group	`1.27ms` from Ho Chi Minh City, VN
180.100.43.199	AS4134 CHINANET-BACKBONE	`6.33ms` from Huai'an, CN
222.237.194.39	AS9318 SK Broadband Co Ltd	`1.29ms` from Incheon, KR
126.209.68.39	AS135607 Infinivan Incorporated	`0.25ms` from Manila, PH
31.188.192.71	AS24608 WIND TRE S.P.A.	`5.66ms` from Milan, IT
185.126.82.199	AS63473 HostHatch, LLC	`0.09ms` from New York City, US
89.168.44.151	AS31898 Oracle Corporation	`0.17ms` from Paris, FR
171.33.105.183	AS50624 Outscale SASU	`0.79ms` from Paris, FR
47.119.139.167	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`1.46ms` from Shenzhen, CN
219.69.44.135	AS9416 Hoshin Multimedia Center Inc.	`1.62ms` from Taipei, TW
106.178.247.151	AS2516 KDDI CORPORATION	`7.80ms` from Tokyo, JP
83.4.166.119	AS5617 Orange Polska Spolka Akcyjna	`1.52ms` from Wrocław, PL
171.6.181.199	AS45758 Triple T Broadband Public Company Limited	`2.48ms` from Bangkok, TH
119.250.81.247	AS4837 CHINA UNICOM China169 Backbone	`6.17ms` from Beijing, CN
109.137.151.55	AS5432 Proximus NV	`0.92ms` from Brussels, BE
84.238.38.247	AS33796 BOLIGNET-AARHUS F.M.B.A.	`3.42ms` from Copenhagen, DK
189.162.89.247	AS8151 UNINET	`4.55ms` from Guadalajara, MX
106.240.0.151	AS3786 LG DACOM Corporation	`1.89ms` from Incheon, KR
123.213.222.119	AS9318 SK Broadband Co Ltd	`5.03ms` from Incheon, KR

Traceroute

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

traceroute -a -n -q1 -m6 172.56.166.89

traceroute to 172.56.166.89 (172.56.166.89): 6 hops max, 52 byte packets

1 [AS31898] 140.204.222.216 0.129 ms

2 [AS21928] 66.94.0.89 13.498 ms

3 [AS21928] 66.94.0.88 0.534 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Ashburn, US

On January 18th 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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