172.56.78.0/23

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:      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


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

Overlapping Ranges

BGP prefixes that contain 172.56.78.0/23

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 6 domain names hosted across 5 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
172.56.79.79	mikespiering.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
74.136.133.231	AS10796 Charter Communications Inc	`15.86ms` from Flint, US
3.120.59.87	AS16509 Amazon.com, Inc.	`0.18ms` from Frankfurt am Main, DE
111.124.209.215	AS4134 CHINANET-BACKBONE	`1.53ms` from Guiyang, CN
118.69.186.71	AS18403 FPT Telecom Company	`0.66ms` from Ho Chi Minh City, VN
81.158.203.7	AS2856 British Telecommunications PLC	`7.93ms` from London, GB
130.0.90.39	AS207147 Nexera SAS	`0.41ms` from Paris, FR
112.164.19.199	AS4766 Korea Telecom	`5.29ms` from Seoul, KR
213.89.161.231	AS1257 Tele2 Sverige AB	`5.28ms` from Stockholm, SE
115.120.222.167	AS55990 Huawei Cloud Service data center	`3.00ms` from Suzhou, CN
60.60.179.215	AS9824 JCOM Co., Ltd.	`10.17ms` from Tokyo, JP
27.17.164.231	AS4134 CHINANET-BACKBONE	`2.32ms` from Wuhan, CN
47.72.169.151	AS9500 One New Zealand Group Limited	`2.37ms` from Auckland, NZ
85.106.81.247	AS9121 Turk Telekomunikasyon Anonim Sirketi	`14.74ms` from Bursa, TR
74.139.186.55	AS10796 Charter Communications Inc	`17.68ms` from Columbus, US
71.218.163.247	AS209 CenturyLink Communications, LLC	`1.89ms` from Denver, US
128.77.4.215	AS394089 Google LLC	`0.93ms` from Frankfurt am Main, DE
70.112.101.151	AS11427 Charter Communications Inc	`11.34ms` from Houston, US
78.180.124.87	AS9121 Turk Telekomunikasyon Anonim Sirketi	`3.00ms` from Istanbul, TR
16.78.171.119	AS16509 Amazon.com, Inc.	`0.13ms` from Jakarta, ID
86.184.124.215	AS2856 British Telecommunications PLC	`6.34ms` from London, GB
95.252.80.87	AS3269 Telecom Italia S.p.A.	`5.59ms` from Milan, IT
74.14.194.7	AS577 Bell Canada	`3.56ms` from Montreal, CA
95.191.32.71	AS12389 PJSC Rostelecom	`5.38ms` from Novosibirsk, RU
138.2.55.199	AS31898 Oracle Corporation	`0.22ms` from Osaka, JP
177.172.84.231	AS26599 TELEFÔNICA BRASIL S.A	`2.10ms` from Osasco, BR

Traceroute

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

traceroute -a -n -q1 -f4 -m9 172.56.78.104

traceroute to 172.56.78.104 (172.56.78.104): 9 hops max, 52 byte packets

4 [AS63949] 173.230.159.134 0.252 ms

5 [AS20940] 23.203.158.52 0.566 ms

6 [AS21928] 66.94.0.36 9.554 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Santa Clara, US

On December 20th 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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