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:      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:        [email protected]
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:        2025-01-09
OfficePhone:    +1-888-662-4662
Mailbox:        [email protected]
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
60.206.88.103	AS4808 China Unicom Beijing Province Network	`4.30ms` from Beijing, CN
99.149.26.103	AS7018 AT&T Enterprises, LLC	`6.79ms` from Chicago, US
72.179.99.167	AS11427 Charter Communications Inc	`12.78ms` from Dallas, US
90.220.72.215	AS5607 Sky UK Limited	`6.00ms` from Erith, GB
171.242.9.55	AS7552 Viettel Group	`1.87ms` from Hanoi, VN
95.40.152.135	AS16509 Amazon.com, Inc.	`0.15ms` from Hong Kong, HK
97.202.69.119	AS6167 Verizon Business	`16.72ms` from Los Angeles, US
34.129.64.135	AS396982 Google LLC	`0.09ms` from Melbourne, AU
73.254.90.55	AS7922 Comcast Cable Communications, LLC	`13.06ms` from Seattle, US
112.168.108.119	AS4766 Korea Telecom	`1.35ms` from Seoul, KR
47.103.104.23	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`3.72ms` from Shanghai, CN
217.24.184.167	AS28890 INSYS ISP	`0.78ms` from Yekaterinburg, RU
177.82.136.7	AS28573 Claro NXT Telecomunicacoes Ltda	`9.46ms` from Curitiba, BR
72.46.85.39	AS396356 Latitude.sh	`0.09ms` from Dallas, US
106.110.86.135	AS4134 CHINANET-BACKBONE	`10.02ms` from Huai'an, CN
86.142.231.183	AS2856 British Telecommunications PLC	`12.92ms` from London, GB
51.49.221.151	AS16509 Amazon.com, Inc.	`6.09ms` from Madrid, ES
201.166.143.7	AS7438 PEGASO PCS	`19.45ms` from Monterrey, MX
35.182.23.7	AS16509 Amazon.com, Inc.	`0.16ms` from Montreal, CA
46.181.47.23	AS39927 E-Light-Telecom Ltd.	`4.37ms` from Novosibirsk, RU
91.254.90.167	AS1267 WIND TRE S.P.A.	`10.44ms` from Rome, IT
3.39.33.7	AS16509 Amazon.com, Inc.	`0.33ms` from Seoul, KR
172.70.223.247	AS13335 Cloudflare, Inc.	`0.45ms` from Tokyo, JP
172.199.207.199	AS8075 Microsoft Corporation	`0.31ms` from Amsterdam, NL
122.181.92.87	AS24560 Bharti Airtel Ltd., Telemedia Services	`6.02ms` from Delhi, IN

Traceroute

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

traceroute -a -n -q1 -m6 172.56.136.181

traceroute to 172.56.136.181 (172.56.136.181): 6 hops max, 52 byte packets

1 [AS7203] 209.58.131.61 0.144 ms

2 [AS7203] 173.208.122.6 0.796 ms

3 [AS6461] 64.125.43.65 0.274 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in San Jose, US

On November 28th 2025

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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