100.128.0.0/9

AS21928 · T-Mobile USA, Inc.

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Summary

Country	United States
Domain	t-mobile.com
ASN	AS21928
Registry	ARIN
ID	CORE2

WHOIS Details

NetHandle:      NET-100-128-0-0-1
OrgID:          TMOBI
Parent:         NET-100-0-0-0-0
NetName:        CORE2
NetRange:       100.128.0.0 - 100.255.255.255
NetType:        allocation
RegDate:        2012-02-27
Updated:        2012-05-24
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:        abuse@t-mobile.com
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:        ARINtechcontact@t-mobile.com
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 100.0.0.0/8

Range	ASN	Company	Num of IPs
100.48.0.0/12	AS14618	Amazon Data Services Northern Virginia	1,048,576
100.24.0.0/13	AS14618	Amazon Data Services Northern Virginia	524,288
100.20.0.0/14	AS16509	Amazon.com, Inc.	262,144
100.44.0.0/14	AS14654	AT&T Enterprises, LLC	262,144
100.43.192.0/18	AS14265	TPx Communications	16,384
100.43.64.0/19	AS208398	Edge Technology Plus d.o.o. Beograd	8,192
100.43.96.0/19	AS22995	Xplore Inc.	8,192
100.43.32.0/19	AS53809	Texas Tech University Health Sciences Center at El Paso	8,192
100.42.240.0/20	AS11260	EastLink	4,096
100.42.160.0/20	AS13692	Douglas FastNet	4,096
100.42.64.0/20	AS16509	Amazon.com, Inc.	4,096
100.42.32.0/20	AS17004	Kentucky Wimax	4,096
100.42.208.0/20	AS18450	WebNX, Inc.	4,096
100.42.144.0/20	AS20030	Artelco	4,096
100.42.128.0/20	AS26732	Wagner College	4,096
100.42.0.0/20	AS36426	IsoTropic Networks, Inc.	4,096
100.42.16.0/20	AS46841	Fork Networking, LLC	4,096
100.42.224.0/20	AS54288	SolidTools Technology, Inc.	4,096
100.42.184.0/21	AS51167	Contabo GmbH	2,048
100.42.176.0/21	AS51167	Contabo GmbH	2,048
100.43.22.0/23	AS174	APOG-HOWARD	512
100.43.20.0/23	AS395597	Apogee-Furman	512
100.43.24.0/23	AS40082	APOG-CofC	512
100.43.28.0/23	AS395597	APOG-GSU	512
100.43.27.0/24	AS395597	APOG-ATL-COLO	256
100.43.30.0/24	AS395597	APOG-GSU	256
100.43.3.0/24	AS395597	APOG-MOOREHOUSEC-24	256
100.43.5.0/24	AS395597	BOLD-CACC	256
100.43.13.0/24	AS400614	University of the Ozarks	256
100.43.2.0/24	AS40082	APOG-CofC	256
100.42.89.0/24	AS62643	The Community Agency	256
100.43.0.0/24	AS22773	BOLD-UniversityWestFlorida	256
100.42.26.0/24	AS17676	SoftBank Corp	256
100.42.17.0/24	AS26241	Castle VPN	256
100.42.193.0/24	AS32524	M9 Systems	256
100.42.27.0/24	AS54098	Fork Networking	256
100.43.14.0/24	AS3356	Lock Haven University	256
100.42.92.0/24	AS62643	The Community Agency	256
100.43.31.0/24	AS395461	Apogee Dev Lab	256
100.43.12.0/24	AS395597	Apogee - Morehouse College	256
100.43.26.0/24	AS395597	APOG-GSU	256

Hosted domains

There are 277 domain names hosted across 55 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
100.200.30.42	eventbasedinnovation.com	109
100.200.30.41	limitmfs.com	82
100.150.100.7	supericehockey.pro	16
100.172.94.1	hotelaveinn.com	10
100.247.208.97	colegioasaf.com	3
100.204.208.97	oldhamcountyday.com	3
100.204.28.97	napabouncebash.com	3
100.200.30.40	cynk.finance	3
100.173.196.1	fs-yasha.com	2
100.240.208.97	mg-insulation.com	2
100.200.100.200	kazanmakistermisin.net	2
100.244.208.97	xxplosivecandy.com	2
100.244.137.163	gigatoolstore.in	1
100.200.0.0	jacegu.work	1
100.231.100.171	landsdoctor.com	1
100.163.8.190	floenzfactory.de	1
100.224.208.97	thestaingang.com	1
100.170.132.100	forexgate.in	1
100.218.193.229	doalias.site	1
100.200.158.151	hgb.com.cn	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
154.254.128.41	AS36947 Telecom Algeria	`11.59ms` from Algiers, DZ
34.208.247.153	AS16509 Amazon.com, Inc.	`0.16ms` from Boardman, US
213.160.185.89	AS6855 Slovak Telekom, a.s.	`1.82ms` from Bratislava, SK
71.70.196.185	AS11426 Charter Communications Inc	`9.25ms` from Charlotte, US
24.106.157.25	AS33363 Charter Communications, Inc	`5.18ms` from Chicago, US
40.134.194.89	AS7029 Windstream Communications LLC	`5.99ms` from Dallas, US
20.228.14.105	AS8075 Microsoft Corporation	`0.40ms` from Des Moines, US
156.67.170.89	AS60294 Deutsche Glasfaser Wholesale GmbH	`0.99ms` from Duesseldorf, DE
221.176.238.217	AS24445 Henan Mobile Communications Co.,Ltd	`9.57ms` from Jinan, CN
8.41.21.137	AS27425 IdeaTek Telcom, LLC	`5.94ms` from Kansas City, US
95.106.187.9	AS12389 PJSC Rostelecom	`11.10ms` from Moscow, RU
43.231.238.185	AS55352 Microscan Internet Limited	`0.36ms` from Mumbai, IN
91.188.10.233	AS43279 Telespazio S.p.A.	`3.10ms` from Rome, IT
200.209.117.41	AS4230 CLARO S.A.	`0.59ms` from Sao Paulo, BR
211.187.165.169	AS9318 SK Broadband Co Ltd	`1.69ms` from Seoul, KR
210.168.135.249	AS2516 KDDI CORPORATION	`0.96ms` from Tokyo, JP
202.160.65.185	AS2914 NTT America, Inc.	`0.27ms` from Tokyo, JP
95.155.25.217	AS8585 Crnogorski Telekom a.d.Podgorica	`12.41ms` from Zagreb, HR
199.255.49.9	AS13572 Lahey Clinic, Inc.	`1.23ms` from Boston, US
82.76.147.137	AS8708 DIGI ROMANIA S.A.	`0.83ms` from Bucharest, RO
129.128.81.9	AS3359 University of Alberta	`5.52ms` from Calgary, CA
187.228.72.185	AS8151 UNINET	`14.44ms` from Cancún, MX
175.6.172.169	AS63835 CT-HuNan-Changsha-IDC	`0.29ms` from Changsha, CN
76.136.191.9	AS7922 Comcast Cable Communications, LLC	`5.88ms` from Chicago, US
34.69.206.153	AS396982 Google LLC	`0.11ms` from Council Bluffs, US

Traceroute

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

traceroute -a -n -q1 -f2 -m9 100.171.166.57

traceroute to 100.171.166.57 (100.171.166.57): 9 hops max, 52 byte packets

2 [AS917] 199.119.65.2 0.443 ms

3 *

4 *

5 *

6 [AS174] 154.54.10.182 0.265 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Ashburn, US

On December 14th 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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