172.56.240.0/21

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 172.56.240.0/21

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

IP Address	Domain	Domains on this IP

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
27.109.17.21	AS17625 BlazeNet's Network	`1.56ms` from Ahmedabad, IN
194.245.103.37	AS5517 CSL Computer Service Langenbach GmbH	`3.54ms` from Amsterdam, NL
3.80.226.245	AS14618 Amazon.com, Inc.	`0.63ms` from Ashburn, US
172.75.219.213	AS11426 Charter Communications Inc	`11.49ms` from Atlanta, US
193.223.21.37	AS3303 Swisscom (Switzerland) Ltd	`15.84ms` from Bologna, IT
41.83.145.165	AS8346 SONATEL-AS Autonomous System	`2.44ms` from Dakar, SN
95.223.10.21	AS3209 Vodafone GmbH	`10.29ms` from Duesseldorf, DE
85.6.179.229	AS3303 Swisscom (Switzerland) Ltd	`0.75ms` from Geneve, CH
223.214.151.101	AS4134 CHINANET-BACKBONE	`8.91ms` from Huai'an, CN
109.70.189.181	AS44391 JSC Elektrosvyaz	`0.47ms` from Karachi, PK
180.107.44.133	AS140292 CHINATELECOM Jiangsu province Suzhou 5G network	`6.60ms` from Nanjing, CN
50.86.22.101	AS11272 C Spire Fiber	`3.84ms` from New Orleans, US
157.230.181.101	AS14061 DigitalOcean, LLC	`0.20ms` from New York City, US
186.239.224.5	AS10429 TELEFÔNICA BRASIL S.A	`0.77ms` from Osasco, BR
20.106.123.5	AS8075 Microsoft Corporation	`0.43ms` from Phoenix, US
39.65.44.101	AS4837 CHINA UNICOM China169 Backbone	`1.91ms` from Qingdao, CN
187.45.172.85	AS28137 Vialink Soluções de Tecnologia Ltda	`1.67ms` from Rio de Janeiro, BR
151.63.211.229	AS1267 WIND TRE S.P.A.	`11.86ms` from Rome, IT
61.78.119.181	AS4766 Korea Telecom	`1.18ms` from Seoul, KR
62.166.219.197	AS50266 Odido Netherlands B.V.	`2.83ms` from Amsterdam, NL
73.38.216.197	AS7922 Comcast Cable Communications, LLC	`5.73ms` from Boston, US
165.0.7.197	AS37053 RSAWEB (PTY) LTD	`1.37ms` from Cape Town, ZA
20.9.72.53	AS8075 Microsoft Corporation	`0.15ms` from Des Moines, US
31.209.241.213	AS6677 Mila hf	`8.93ms` from Hafnarfjoerdur, IS
147.148.88.21	AS2856 British Telecommunications PLC	`5.79ms` from London, GB

Traceroute

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

traceroute -a -n -q1 -m6 172.56.243.95

traceroute to 172.56.243.95 (172.56.243.95): 6 hops max, 52 byte packets

1 [AS31898] 140.204.222.218 2.711 ms

2 [AS21928] 66.94.0.89 2.075 ms

3 [AS21928] 66.94.0.88 0.681 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Ashburn, US

On March 13th 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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