172.56.124.0/23

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 172.56.124.0/23

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
172.56.124.17	costello-homelab.com	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

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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
195.85.20.135	AS399399 Luxottica of America Inc.	`0.29ms` from Ashburn, US
37.223.239.231	AS12430 VODAFONE ESPANA S.A.U.	`6.06ms` from Barcelona, ES
180.77.108.135	AS17429 BEIJING GEHUA CATV NETWORK CO.LTD	`10.81ms` from Beijing, CN
186.56.81.7	AS22927 Telefonica de Argentina	`1.03ms` from Buenos Aires, AR
67.175.197.231	AS7922 Comcast Cable Communications, LLC	`6.92ms` from Chicago, US
176.235.202.247	AS34984 Superonline Iletisim Hizmetleri A.S.	`10.94ms` from Istanbul, TR
125.168.237.215	AS9443 Vocus Retail	`1.00ms` from Melbourne, AU
47.197.90.151	AS5650 Frontier Communications of America, Inc.	`6.28ms` from Miami, US
2.32.161.135	AS30722 Vodafone Italia S.p.A.	`2.29ms` from Milan, IT
42.125.147.231	AS10010 TOKAI Communications Corporation	`5.73ms` from Osaka, JP
186.176.142.71	AS262197 MILLICOM CABLE COSTA RICA S.A.	`8.57ms` from San Jose, CR
106.10.49.135	AS135354 NAVER BUSINESS PLATFORM ASIA PACIFIC PTE. LTD.	`1.47ms` from Seoul, KR
59.19.85.247	AS4766 Korea Telecom	`7.31ms` from Seoul, KR
27.1.49.23	AS9943 KangNam CableTV	`1.40ms` from Seoul, KR
20.191.239.55	AS8075 Microsoft Corporation	`0.72ms` from Sydney, AU
60.104.55.151	AS17676 SoftBank Corp.	`3.26ms` from Tokyo, JP
122.222.53.23	AS2519 ARTERIA Networks Corporation	`18.40ms` from Tokyo, JP
37.209.191.23	AS41872 Flashcable Network	`0.89ms` from Zuerich, CH
84.80.93.103	AS1136 KPN B.V.	`1.75ms` from Amsterdam, NL
77.174.132.247	AS1136 KPN B.V.	`1.29ms` from Amsterdam, NL
51.15.124.135	AS12876 SCALEWAY S.A.S.	`0.36ms` from Amsterdam, NL
108.31.46.215	AS701 Verizon Business	`3.39ms` from Ashburn, US
51.0.136.103	AS16509 Amazon.com, Inc.	`0.93ms` from Berlin, DE
105.233.138.39	AS36874 Cybersmart	`1.58ms` from Cape Town, ZA
125.70.13.87	AS4134 CHINANET-BACKBONE	`3.08ms` from Chengdu, CN

Traceroute

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

traceroute -a -n -q1 -m6 172.56.124.77

traceroute to 172.56.124.77 (172.56.124.77): 6 hops max, 52 byte packets

1 [AS31898] 140.204.222.224 0.177 ms

2 [AS21928] 66.94.0.89 0.611 ms

3 [AS21928] 66.94.0.88 0.625 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Ashburn, US

On December 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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