172.56.66.0/23

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:        [email protected]
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:        2025-01-09
OfficePhone:    +1-888-662-4662
Mailbox:        [email protected]
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 172.56.66.0/23

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 9 domain names hosted across 7 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
172.56.66.132	soozerama.com	2

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
109.239.32.247	AS39824 JSC Alma Telecommunications	`0.72ms` from Almaty, KZ
48.194.108.87	AS8075 Microsoft Corporation	`0.45ms` from Ashburn, US
44.235.193.215	AS16509 Amazon.com, Inc.	`0.16ms` from Boardman, US
139.209.148.151	AS4837 CHINA UNICOM China169 Backbone	`6.52ms` from Changchun, CN
203.32.23.199	AS202656 Ivanov Vitaliy Sergeevich	`0.24ms` from Frankfurt am Main, DE
128.214.194.71	AS1741 CSC - Tieteen tietotekniikan keskus Oy	`2.91ms` from Helsinki, FI
222.74.220.151	AS4134 CHINANET-BACKBONE	`1.53ms` from Hohhot, CN
37.55.143.7	AS6849 JSC "Ukrtelecom"	`12.33ms` from Kyiv, UA
42.54.140.231	AS4837 CHINA UNICOM China169 Backbone	`8.30ms` from Liaoyang, CN
2.4.240.71	AS3215 Orange S.A.	`6.24ms` from Marseille, FR
204.216.196.71	AS31898 Oracle Corporation	`0.19ms` from Phoenix, US
27.216.224.135	AS4837 CHINA UNICOM China169 Backbone	`7.13ms` from Qingdao, CN
192.69.236.215	AS7992 Cogeco Connexion Inc.	`6.15ms` from Toronto, CA
27.155.176.119	AS4134 CHINANET-BACKBONE	`2.00ms` from Fuzhou, CN
36.101.35.215	AS4134 CHINANET-BACKBONE	`3.80ms` from Haikou, CN
23.128.248.23	AS400226 StormyCloud Inc	`1.29ms` from Houston, US
136.37.85.119	AS16591 Google Fiber Inc.	`0.75ms` from Kansas City, US
38.242.211.151	AS51167 Contabo GmbH	`0.16ms` from Lauterbourg, FR
89.36.142.215	AS201341 trafficforce, UAB	`0.37ms` from London, GB
63.196.150.23	AS7018 AT&T Enterprises, LLC	`2.35ms` from Los Angeles, US
64.238.190.55	AS10674 Gainesville Regional Utilities	`8.36ms` from Miami, US
160.251.171.215	AS58791 GMO Internet Group, Inc.	`7.28ms` from Osaka, JP
193.85.18.231	AS13036 T-Mobile Czech Republic a.s.	`0.77ms` from Prague, CZ
50.19.164.119	AS14618 Amazon.com, Inc.	`0.23ms` from Reston, US
93.177.223.39	AS20910 SIA "BITE Latvija"	`0.57ms` from Riga, LV

Traceroute

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

traceroute -a -n -q1 -f4 -m10 172.56.66.217

traceroute to 172.56.66.217 (172.56.66.217): 10 hops max, 52 byte packets

4 [AS63949] 173.230.159.133 0.428 ms

5 [AS20940] 23.203.158.50 0.744 ms

6 [AS20940] 23.207.232.33 0.766 ms

7 [AS21928] 66.94.0.36 0.877 ms

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Measurement taken from

IPinfo ProbeNet in Santa Clara, US

On November 28th 2025

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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