172.56.56.0/23

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 172.56.56.0/23

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

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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
20.42.33.247	AS8075 Microsoft Corporation	`0.43ms` from Ashburn, US
3.137.21.71	AS16509 Amazon.com, Inc.	`0.17ms` from Columbus, US
90.193.186.23	AS5607 Sky UK Limited	`1.80ms` from Erith, GB
45.248.108.231	AS146772 Shenzhen Pengcheng communication network Co., Ltd	`2.75ms` from Guangzhou, CN
182.182.57.71	AS17557 Pakistan Telecommunication Company Limited	`6.61ms` from Karachi, PK
49.86.140.7	AS4134 CHINANET-BACKBONE	`4.86ms` from Nanjing, CN
91.5.121.215	AS3320 Deutsche Telekom AG	`5.44ms` from Nuernberg, DE
78.13.198.23	AS16509 Amazon.com, Inc.	`0.34ms` from Santiago de Queretaro, MX
189.5.211.7	AS28573 Claro NXT Telecomunicacoes Ltda	`5.33ms` from Sao Paulo, BR
146.12.217.7	AS11179 Aryaka Networks, Inc.	`0.90ms` from Toronto, CA
23.23.243.23	AS14618 Amazon.com, Inc.	`0.51ms` from Ashburn, US
161.249.255.7	AS10879 Unitedhealthcare	`11.36ms` from Atlanta, US
45.47.2.103	AS11351 Charter Communications Inc	`18.59ms` from Chicago, US
76.210.95.231	AS7018 AT&T Enterprises, LLC	`9.63ms` from Dallas, US
91.60.143.103	AS3320 Deutsche Telekom AG	`5.04ms` from Duesseldorf, DE
188.155.159.135	AS6730 Sunrise GmbH	`1.46ms` from Geneve, CH
60.184.132.151	AS4134 CHINANET-BACKBONE	`10.99ms` from Hangzhou, CN
185.188.38.71	AS43231 KARBIL YAZILIM VE BILISIM TEKNOLOJILERI TIC. A.S.	`3.75ms` from Istanbul, TR
117.233.239.183	AS9829 National Internet Backbone	`3.08ms` from Kolkata, IN
20.219.34.119	AS8075 Microsoft Corporation	`0.15ms` from Lohogaon, IN
154.61.142.215	AS174 Cogent Communications, LLC	`0.41ms` from London, GB
163.150.112.247	AS22315 San Bernardino County Superintendent of Schools	`1.63ms` from Los Angeles, US
71.136.235.135	AS7018 AT&T Enterprises, LLC	`1.02ms` from Los Angeles, US
173.44.53.7	AS20473 The Constant Company, LLC	`0.52ms` from Miami, US
108.190.134.55	AS33363 Charter Communications, Inc	`8.82ms` from Orlando, US

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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