172.56.96.0/23

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:        2026-01-08
OfficePhone:    +1-888-662-4662
Mailbox:        ARINtechcontact@t-mobile.com
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

Overlapping Ranges

BGP prefixes that contain 172.56.96.0/23

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

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
163.129.21.39	AS13445 Cisco Webex LLC	`2.07ms` from Ashburn, US
20.22.154.231	AS8075 Microsoft Corporation	`0.28ms` from Boydton, US
5.204.157.151	AS213155 Yettel Hungary Ltd.	`13.24ms` from Budapest, HU
174.29.115.199	AS209 CenturyLink Communications, LLC	`2.04ms` from Denver, US
86.177.255.39	AS2856 British Telecommunications PLC	`6.57ms` from Erith, GB
14.175.101.87	AS45899 VNPT Corp	`2.15ms` from Hanoi, VN
103.140.146.103	AS4229 Zenlayer Inc	`0.13ms` from Manila, PH
115.129.163.55	AS7545 TPG Telecom Limited	`1.73ms` from Melbourne, AU
75.229.26.167	AS6167 Verizon Business	`13.15ms` from Miami, US
222.188.11.231	AS4134 CHINANET-BACKBONE	`5.67ms` from Nanjing, CN
92.202.14.39	AS2527 Sony Network Communications Inc.	`1.53ms` from Osaka, JP
90.110.106.231	AS3215 Orange S.A.	`3.94ms` from Paris, FR
179.156.197.55	AS28573 Claro NXT Telecomunicacoes Ltda	`11.17ms` from Sao Paulo, BR
97.88.190.7	AS20115 Charter Communications LLC	`7.99ms` from St. Louis, US
185.232.64.71	AS47890 UNMANAGED LTD	`0.37ms` from Timisoara, RO
177.191.43.151	AS53006 ALGAR TELECOM S/A	`5.50ms` from Uberlandia, BR
221.15.148.103	AS4837 CHINA UNICOM China169 Backbone	`0.38ms` from Zhengzhou, CN
97.151.233.231	AS6167 Verizon Business	`10.91ms` from Ashburn, US
76.223.89.39	AS16509 Amazon.com, Inc.	`0.04ms` from Bangkok, TH
139.30.65.23	AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.	`8.16ms` from Berlin, DE
74.1.141.151	AS27176 DataWagon LLC	`1.11ms` from Chicago, US
176.34.68.119	AS16509 Amazon.com, Inc.	`0.19ms` from Dublin, IE
159.138.56.119	AS136907 HUAWEI CLOUDS	`1.04ms` from Hong Kong, HK
86.172.246.23	AS2856 British Telecommunications PLC	`3.60ms` from London, GB
74.89.35.119	AS6128 Cablevision Systems Corp.	`6.76ms` from New York City, US

Traceroute

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

traceroute -a -n -q1 -f4 -m7 172.56.96.186

traceroute to 172.56.96.186 (172.56.96.186): 7 hops max, 52 byte packets

4 [AS21928] 100.199.0.57 0.087 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Liuzhou, CN

On March 21st 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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