ASN Lookup Tool

T Mobile USA, Inc. t-mobile.com US US 541 Routes

AS Data

AS21928

AS21928 – T Mobile USA, Inc.

AS Number 21928
AS Name T-MOBILE-AS21928
Organization T Mobile USA, Inc. (tmobi)
Country US
Website t-mobile.com
Number of IPv4 Routes 285
Number of IPv6 Routes 256
ASN type ISP
Registry ARIN
Date Allocated 2002-06-12

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Use ASN data for AS21928 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
208.54.142.0/24 256
172.58.0.0/15 131072
2607:fb90:3c00::/40 ~309×10²⁴
172.56.18.0/23 512
66.94.29.0/24 256
208.54.112.0/24 256
100.128.0.0/9 8388608
2607:fb90:2300::/40 ~309×10²⁴
2607:fb91:2d00::/40 ~309×10²⁴
2607:fb90:700::/40 ~309×10²⁴
208.54.75.0/24 256
2607:fb91:5100::/40 ~309×10²⁴
2607:fb90:8f00::/40 ~309×10²⁴
66.94.6.0/24 256
2607:fb91:1400::/40 ~309×10²⁴
172.56.78.0/23 512
172.56.210.0/23 512
2607:fb91:400::/40 ~309×10²⁴
2607:fb91:900::/40 ~309×10²⁴
172.59.56.0/21 2048
172.56.24.0/23 512
2607:fb92:2f00::/40 ~309×10²⁴
2607:fb90:cd00::/40 ~309×10²⁴
2607:fb91:1900::/40 ~309×10²⁴
208.54.136.0/23 512
2607:fb91:3e00::/40 ~309×10²⁴
2607:fb90:fff::/48 ~1×10²⁴
172.56.54.0/23 512
2607:fb92:1600::/40 ~309×10²⁴
172.59.184.0/21 2048
2607:fb91:c00::/40 ~309×10²⁴
172.56.240.0/23 512
72.250.0.0/17 32768
2607:fb92:600::/40 ~309×10²⁴
2607:fb92:1e00::/40 ~309×10²⁴
2607:fb90:3900::/40 ~309×10²⁴
172.59.32.0/21 2048
172.56.116.0/23 512
172.56.168.0/21 2048
172.58.128.0/21 2048
2607:fb90:7e00::/40 ~309×10²⁴
2607:fb92:3100::/40 ~309×10²⁴
162.173.20.0/24 256
172.56.204.0/23 512
2607:fb90:6d00::/40 ~309×10²⁴
208.54.39.0/24 256
172.56.182.0/23 512
2607:fb91:2000::/40 ~309×10²⁴
2607:fb92:2a00::/40 ~309×10²⁴
66.94.5.0/24 256
172.56.234.0/23 512
2607:fb90:4500::/40 ~309×10²⁴
172.56.120.0/21 2048
208.54.143.0/24 256
2607:fb90:1200::/40 ~309×10²⁴
208.54.20.0/24 256
2607:fb90:7100::/40 ~309×10²⁴
172.56.236.0/23 512
208.54.2.0/24 256
2607:fb90:fe00::/40 ~309×10²⁴

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       21928
ASName:         T-MOBILE-AS21928
ASHandle:       AS21928
RegDate:        2002-06-12
Updated:        2012-02-24
Ref:            https://rdap.arin.net/registry/autnum/21928



OrgName:        T-Mobile USA, Inc.
OrgId:          TMOBI
Address:        12920 SE 38th Street
City:           Bellevue
StateProv:      WA
PostalCode:     98006
Country:        US
RegDate:        2003-01-02
Updated:        2017-01-28
Ref:            https://rdap.arin.net/registry/entity/TMOBI


OrgAbuseHandle: ABUSE4857-ARIN
OrgAbuseName:   abuse
OrgAbusePhone:  +1-888-662-4662 
OrgAbuseEmail:  abuse@t-mobile.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE4857-ARIN

OrgTechHandle: DNSAD11-ARIN
OrgTechName:   DNS Administrators
OrgTechPhone:  +1-888-662-4662 
OrgTechEmail:  ARINtechcontact@t-mobile.com
OrgTechRef:    https://rdap.arin.net/registry/entity/DNSAD11-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number Description Country
AS21738 Rozint US
AS262589 SAMM TECNOLOGIA E TELECOMUNICACOES S.A BR
AS393577 Tritan Development US
AS401703 Ordinal Advisors LLC US
AS38880 Micron21 Datacentre Pty Ltd AU
AS14537 Continent 8 LLC US
AS4230 CLARO S.A. BR
AS37468 Angola Cables AO
AS199524 G-Core Labs S.A. LU
AS3130 RGnet OU EE
AS293 ESnet US
AS400318 Versa Networks, Inc. US
AS53597 Hoyos Consulting LLC US
AS400818 Ausra LLC US
AS6461 Zayo Bandwidth US
AS58453 China Mobile International Limited HK
AS263237 PowerHost Telecom SPA CL
AS32590 Valve Corporation US
AS38439 ZFS.RENT LLC US
AS19684 Latigo, LLC US
AS61568 ALOO TELECOM - FSF TECNOLOGIA SA BR
AS401332 Triplebit US
AS16550 Google LLC US
AS61461 Airtek Solutions C.A. VE
AS1031 PEER 1031 LLC US
AS6140 Two P US
AS1828 Unitas Global US
AS262355 VSX Networks BR
AS999 CORIX NETWORKS US
AS263152 MIGO TELECOM BR
AS45701 PT. Internet Madju Abad Milenindo ID
AS24516 Virtutel Pty Ltd AU
AS4826 Vocus Connect International Backbone AU
AS32621 Twin City VoIP, Inc. US
AS52025 ParadoxNetworks Limited GB
AS20205 Amplex Electric, Inc. US
AS28398 INTERNET TELEFONIA Y TV DE MICHOACAN SA DE CV MX
AS4455 IX Reach Ltd GB
AS14041 University Corporation for Atmospheric Research US
AS64126 DOMINICAN TELECOM PRIME, DTP, S.R.L. DO
AS264409 GRUPO YAX BR
AS39120 Convergenze S.p.A. IT
AS9002 RETN Limited GB
AS263444 Open X Tecnologia Ltda BR
AS4766 Korea Telecom KR
AS52468 UFINET PANAMA S.A. PA
AS6057 Administracion Nacional de Telecomunicaciones UY
AS148968 Falcore Investments Pty Ltd AU
AS4474 TCT West, Inc. US
AS7575 Australian Academic and Research Network (AARNet) AU
AS17639 Converge ICT Solutions Inc. PH
AS19151 BroadbandONE, LLC US
AS41327 Fiber Telecom S.p.A. IT
AS13786 Seabras 1 USA, LLC US
AS20080 Florida International University US
AS35280 F5 Networks SARL FR
AS21559 OSNET PR
AS16735 ALGAR TELECOM S/A BR
AS21700 Neptune Networks, LLC US
AS49600 NEAR IP, S.L. ES

Upstreams

AS Number Description Country
AS60068 Datacamp Limited GB
AS39120 Convergenze S.p.A. IT
AS64126 DOMINICAN TELECOM PRIME, DTP, S.R.L. DO
AS58453 China Mobile International Limited HK
AS7195 EDGEUNO S.A.S CO
AS18678 INTERNEXA S.A. E.S.P CO
AS9002 RETN Limited GB
AS6939 Hurricane Electric LLC US
AS6057 Administracion Nacional de Telecomunicaciones UY
AS174 Cogent Communications, LLC US
AS32621 Twin City VoIP, Inc. US
AS33891 Core Backbone GmbH DE
AS4230 CLARO S.A. BR
AS37468 Angola Cables AO
AS7575 Australian Academic and Research Network AU
AS52025 ParadoxNetworks Limited GB
AS35280 F5 Networks SARL FR
AS394256 Tech Futures Interactive Inc. CA
AS1031 PEER 1031 LLC US
AS6424 EDGOO NETWORKS UNIPESSOAL LDA PT
AS3356 Level 3 Parent, LLC US
AS6461 Zayo Bandwidth US
AS137409 GSL Networks Pty LTD AU

Downstreams

AS Number Description Country
AS22140 T Mobile USA, Inc. US
AS16550 Google LLC US
AS400318 Versa Networks, Inc. US

Contacts

Email Contacts

ARINtechcontact@t-mobile.com

Abuse Contacts

abuse@t-mobile.com

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Frequently Asked Questions

ASN AS21928 is an Autonomous System Number used to identify a network for BGP internet routing.
AS21928 is listed under T Mobile USA, Inc..
Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.
Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.
WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.
This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.