172.56.188.0/23

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 172.56.188.0/23

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
96.109.51.103	AS7922 Comcast Cable Communications, LLC	`4.13ms` from Ashburn, US
197.55.51.231	AS8452 TE-AS	`8.23ms` from Cairo, EG
47.54.43.215	AS855 Bell Canada	`9.88ms` from Fredericton, CA
192.166.58.23	AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.	`8.76ms` from Garching, DE
47.120.22.215	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`0.44ms` from Heyuan, CN
185.188.131.55	AS206375 NETSPEED INTERNET A.S.	`2.06ms` from Istanbul, TR
113.19.34.23	AS17639 Converge ICT Solutions Inc.	`1.65ms` from Manila, PH
188.191.138.7	AS6758 Monaco Telecom S.A.	`3.92ms` from Marseille, FR
156.248.237.23	AS264750 TELEOPERADORA DEL NORDESTE S.R.L	`18.46ms` from Miami, US
79.35.21.119	AS3269 Telecom Italia S.p.A.	`6.08ms` from Milan, IT
197.237.178.167	AS15399 Wananchi Group (Kenya) Limited	`2.53ms` from Nairobi, KE
191.193.88.87	AS27699 TELEFÔNICA BRASIL S.A	`4.44ms` from Osasco, BR
81.254.229.55	AS3215 Orange S.A.	`9.28ms` from Paris, FR
91.187.68.23	AS6752 Andorra Telecom	`15.07ms` from Saint-Denis, FR
40.131.60.103	AS7029 Windstream Communications LLC	`0.57ms` from Secaucus, US
221.249.219.55	AS17506 ARTERIA Networks Corporation	`1.00ms` from Tokyo, JP
133.125.68.183	AS7684 SAKURA Internet Inc.	`16.27ms` from Tokyo, JP
84.87.45.23	AS1136 KPN B.V.	`1.06ms` from Amsterdam, NL
49.226.252.87	AS9500 One New Zealand Group Limited	`13.15ms` from Auckland, NZ
74.242.61.7	AS8075 Microsoft Corporation	`0.70ms` from Geneve, CH
14.231.232.87	AS45899 VNPT Corp	`1.41ms` from Hanoi, VN
1.55.186.7	AS18403 FPT Telecom Company	`1.23ms` from Ho Chi Minh City, VN
86.19.131.23	AS5089 Virgin Media Limited	`9.05ms` from London, GB
73.188.241.87	AS7922 Comcast Cable Communications, LLC	`6.64ms` from New York City, US
52.225.33.39	AS8075 Microsoft Corporation	`0.56ms` from San Jose, 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 172.56.189.89

traceroute to 172.56.189.89 (172.56.189.89): 7 hops max, 52 byte packets

4 [AS21928] 100.199.0.57 0.086 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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