172.56.240.0/21

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 172.56.240.0/21

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 7 domain names hosted across 7 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
172.56.241.27	blakenoble.com	1

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
44.216.114.165	AS14618 Amazon.com, Inc.	`0.52ms` from Ashburn, US
149.97.236.37	AS15830 Equinix (EMEA) Acquisition Enterprises B.V.	`0.47ms` from Atlanta, US
52.10.47.5	AS16509 Amazon.com, Inc.	`0.18ms` from Boardman, US
107.137.86.69	AS7018 AT&T Enterprises, LLC	`14.82ms` from Columbus, US
50.84.221.229	AS11427 Charter Communications Inc	`2.46ms` from Dallas, US
63.97.4.5	AS701 Verizon Business	`2.36ms` from Dallas, US
3.28.62.101	AS16509 Amazon.com, Inc.	`1.80ms` from Dubai, AE
145.223.46.5	AS13213 UK-2 Limited	`0.47ms` from London, GB
189.126.83.21	AS270632 ACESSE WI-FI SERVICOS, INSTALACAO E MANUTENCAO	`0.15ms` from Osasco, BR
95.157.187.85	AS49112 Societe Francaise Du Radiotelephone - SFR SA	`7.85ms` from Paris, FR
217.24.249.149	AS42313 ONE ALBANIA SH.A.	`6.67ms` from Pristina, XK
50.3.98.133	AS395793 Arisk Communications inc.	`0.15ms` from Seattle, US
49.170.109.21	AS17858 LG POWERCOMM	`7.38ms` from Seoul, KR
20.227.45.117	AS8075 Microsoft Corporation	`0.71ms` from Sydney, AU
24.3.206.101	AS7922 Comcast Cable Communications, LLC	`10.55ms` from Ashburn, US
99.108.118.149	AS7018 AT&T Enterprises, LLC	`7.66ms` from Chicago, US
189.58.108.69	AS18881 TELEFÔNICA BRASIL S.A	`12.63ms` from Curitiba, BR
201.20.123.5	AS28598 DB3 SERVICOS DE TELECOMUNICACOES S.A	`0.68ms` from Fortaleza, BR
195.30.193.21	AS5539 SpaceNet AG	`5.60ms` from Frankfurt am Main, DE
4.225.110.5	AS8075 Microsoft Corporation	`0.22ms` from Gaevle, SE
178.17.133.21	AS42514 Signal Service LLC	`12.09ms` from Moscow, RU
185.87.101.181	AS16347 ADISTA SAS	`0.46ms` from Paris, FR
129.219.153.213	AS2900 Arizona Tri University Network	`0.83ms` from Phoenix, US
18.178.223.245	AS16509 Amazon.com, Inc.	`0.16ms` from Tokyo, JP
191.55.116.197	AS53006 ALGAR TELECOM S/A	`8.14ms` from Uberlandia, BR

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 172.56.243.229

traceroute to 172.56.243.229 (172.56.243.229): 10 hops max, 52 byte packets

4 [AS63949] 173.230.159.133 0.672 ms

5 [AS20940] 23.203.158.50 0.733 ms

6 [AS20940] 23.207.232.33 0.608 ms

7 [AS21928] 66.94.0.36 0.691 ms

8 *

9 *

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Measurement taken from

IPinfo ProbeNet in Santa Clara, US

On December 29th 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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