Autonomous system
AS21928 T-MOBILE-AS21928
Mobile ARIN
IPv4 addresses
13.12M
127 prefixes
IPv6 prefixes
193
counted as prefixes, not addresses
Countries
1
mostly US
Flagged prefixes
0
none
Summary
T-Mobile US
isp mobile eyeball
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. Source, and how to suggest an edit.
Address space
Summary
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 320 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS21928- Registry name
- T-MOBILE-AS21928
- Registrant
- T-Mobile USA, Inc.
- Abuse contact
- abuse@t-mobile.com
- Registered
- 2002-06-12
- Last changed
- 2012-02-24
- Status
- active
Reputation
Classification and threat
Mobile Cellular carrier. Addresses are shared by many handsets via CGNAT.
No IC3 indicators Nothing from the FBI IC3 feed.
Threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere