AS21928 — T-MOBILE-AS21928

Network type: mobile

AS21928 announces 26 IPv4 prefixes covering 13,121,792 addresses and 20 IPv6 prefixes.

About this network

T-Mobile US (T-MOBILE-AS21928) — one of the three big US mobile carriers, and increasingly a home-internet provider via 5G fixed wireless.

What it's used for

• Mobile data for tens of millions of subscribers, plus T-Mobile Home Internet (5G fixed wireless).

Notable

• A large "eyeball" network — addresses here are typically mobile devices or fixed-wireless homes, often behind carrier-grade NAT.
• Grew by merging with Sprint in 2020.

Interesting

• T-Mobile's "Un-carrier" strategy and the Sprint merger reshaped US mobile competition into a three-carrier market.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 65.76.0.0/16
• 66.94.0.0/19
• 72.250.0.0/18
• 72.250.64.0/20
• 72.250.96.0/20
• 74.60.0.0/16
• 75.122.0.0/15
• 97.65.105.0/24
• 100.128.0.0/9
• 104.152.20.0/24
• 162.160.0.0/11
• 167.20.0.0/16
• 168.73.0.0/16
• 170.206.0.0/16
• 172.32.0.0/11
• 174.141.208.0/20
• 206.29.168.0/22
• 206.29.188.0/22
• 208.54.0.0/19
• 208.54.32.0/24
• 208.54.34.0/23
• 208.54.36.0/22
• 208.54.40.0/21
• 208.54.48.0/20
• 208.54.64.0/18
• 208.54.128.0/19
• 2001:4870:150::/44
• 2001:4870:e00b::/48
• 2607:f880:ff20::/44
• 2607:fb90::/32
• 2607:fb90:c13f::/48
• 2607:fb90:c140::/42
• 2607:fb90:c180::/41
• 2607:fb90:c200::/39
• 2607:fb90:c400::/38
• 2607:fb90:c800::/37
• 2607:fb90:d000::/36
• 2607:fb90:e000::/35
• 2607:fb91::/32
• 2607:fb91:a600::/39
• 2607:fb91:a800::/37
• 2607:fb91:b000::/36
• 2607:fb91:c000::/34
• 2607:fb92::/31
• 2607:fb94::/30
• 2607:fb98::/29

Upstream networks

• AS174 Cogent Communications, LLC
• AS6939 Hurricane Electric LLC
• AS6461 Zayo Bandwidth
• AS3356 Level 3 Parent, LLC
• AS4637 Telstra Global
• AS24482 SG.GS
• AS20205 Amplex Electric, Inc.
• AS9002 RETN Limited
• AS7922 Comcast Cable Communications, LLC
• AS394256 Tech Futures Interactive Inc.
• AS35280 F5 Networks SARL
• AS33891 Core-Backbone GmbH
• AS7575 Australian Academic and Research Network (AARNet)
• AS17639 Converge ICT Solutions Inc.
• AS34927 iFog GmbH
• AS6424 EDGOO NETWORKS UNIPESSOAL LDA
• AS293 ESnet
• AS3130 RGnet OU
• AS4230 CLARO S.A.
• AS52025 ParadoxNetworks Limited

Downstream networks

• AS400318 Versa Networks, Inc.
• AS22140 T-Mobile USA, Inc.
• AS16550 Google LLC

Adjacent networks

• AS174 Cogent Communications, LLC
• AS6939 Hurricane Electric LLC
• AS6461 Zayo Bandwidth
• AS3356 Level 3 Parent, LLC
• AS4637 Telstra Global
• AS24482 SG.GS
• AS20205 Amplex Electric, Inc.
• AS9002 RETN Limited
• AS7922 Comcast Cable Communications, LLC
• AS400318 Versa Networks, Inc.
• AS22140 T-Mobile USA, Inc.
• AS394256 Tech Futures Interactive Inc.
• AS35280 F5 Networks SARL
• AS7575 Australian Academic and Research Network (AARNet)
• AS33891 Core-Backbone GmbH
• AS17639 Converge ICT Solutions Inc.
• AS34927 iFog GmbH
• AS6424 EDGOO NETWORKS UNIPESSOAL LDA
• AS293 ESnet
• AS3130 RGnet OU
• AS4230 CLARO S.A.
• AS16550 Google LLC
• AS52025 ParadoxNetworks Limited

Internet exchanges

• Equinix Internet Exchange Ashburn — Ashburn, United States
• Seattle Internet Exchange — Seattle, United States
• Coresite - Any2 West — Los Angeles, United States
• Any2 California — Los Angeles, United States
• Equinix Internet Exchange Chicago — Chicago, United States
• Equinix Internet Exchange Dallas — Dallas, United States
• New York International Internet Exchange — New York, United States
• FL-IX - The Florida Internet Exchange / Community IX - Florida — Miami, United States
• Midwest Internet Cooperative Exchange — Minneapolis, United States
• San Francisco Metropolitan Internet Exchange — San Francisco, United States
• Northwest Access Exchange — Portland, United States
• Detroit Internet Exchange — Detroit, United States
• Boston Internet Exchange — Boston, United States
• Puerto Rico Internet Exchange — San Juan, Puerto Rico