172.56.136.0/23

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 172.56.136.0/23

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
131.224.2.135	AS1103 SURF B.V.	`0.65ms` from Amsterdam, NL
14.242.215.231	AS45899 VNPT Corp	`4.73ms` from Ho Chi Minh City, VN
75.85.94.183	AS20001 Charter Communications Inc	`5.40ms` from Honolulu, US
201.103.255.103	AS8151 UNINET	`3.77ms` from Santiago de Queretaro, MX
141.196.130.215	AS16135 Turkcell A.S.	`15.31ms` from Ankara, TR
146.168.243.215	AS11776 Breezeline	`10.87ms` from Ashburn, US
136.50.186.215	AS16591 Google Fiber Inc.	`6.97ms` from Dallas, US
134.41.164.103	AS855 Bell Canada	`5.73ms` from Fredericton, CA
168.253.207.119	AS37276 VOffice Solutions	`2.13ms` from Johannesburg, ZA
27.225.60.215	AS4134 CHINANET-BACKBONE	`9.14ms` from Lanzhou, CN
95.166.5.231	AS48101 Trooli Ltd.	`1.37ms` from London, GB
91.212.61.103	AS47270 GL-21 LLC	`1.04ms` from Moscow, RU
222.188.51.231	AS4134 CHINANET-BACKBONE	`4.63ms` from Nanjing, CN
126.108.34.199	AS17676 SoftBank Corp.	`2.30ms` from Osaka, JP
76.144.157.215	AS7922 Comcast Cable Communications, LLC	`6.93ms` from Portland, US
20.104.140.103	AS8075 Microsoft Corporation	`0.16ms` from Quebec, CA
14.57.114.247	AS4766 Korea Telecom	`2.24ms` from Seoul, KR
210.165.67.55	AS2514 NTT PC Communications, Inc.	`6.80ms` from Tokyo, JP
143.125.242.167	AS2514 NTT PC Communications, Inc.	`0.70ms` from Tokyo, JP
75.197.250.215	AS6167 Verizon Business	`10.26ms` from Chicago, US
177.96.28.151	AS18881 TELEFÔNICA BRASIL S.A	`4.63ms` from Curitiba, BR
90.208.58.231	AS5607 Sky UK Limited	`2.54ms` from Erith, GB
183.62.47.215	AS4134 CHINANET-BACKBONE	`1.91ms` from Guangzhou, CN
114.55.112.231	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`4.69ms` from Hangzhou, CN
85.108.174.215	AS9121 Turk Telekomunikasyon Anonim Sirketi	`3.92ms` from Istanbul, TR

Traceroute

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

traceroute -a -n -q1 -f4 -m10 172.56.137.77

traceroute to 172.56.137.77 (172.56.137.77): 10 hops max, 52 byte packets

4 [AS63949] 173.230.159.133 1.946 ms

5 [AS20940] 23.203.158.50 0.658 ms

6 [AS20940] 23.207.232.33 0.697 ms

7 [AS21928] 66.94.0.36 10.553 ms

8 *

9 *

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Measurement taken from

IPinfo ProbeNet in Santa Clara, US

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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