AS21928 T-Mobile USA, Inc. πŸ‡ΊπŸ‡Έ US

Announcing 543 prefixes, seen at the RIS collectors.

IPv4 prefixes
284
13,956,864 (54,519 Γ— /24)
IPv6 prefixes
259
18 Γ— /32
Upstreams
5
transit providers observed
Peers
11
settlement-free adjacencies
Downstreams
3
transit customers observed
Customer cone
4
ASes reachable through it

Registry and operator data

AS number
AS21928
Name
T-Mobile USA, Inc.
Organisation
T-Mobile USA
Country
πŸ‡ΊπŸ‡Έ US
RIR
ARIN
Allocated
2002-06-12
Network type
Cable/DSL/ISP
Scope
North America
Peering policy
Selective
IRR as-set
AS-21928
PeeringDB
net/3592
Exchanges
9
Facilities
16

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

543 valid (100.0%) 0 invalid (0.0%) 0 no ROA (0.0%)

Announcement history

One point per day, recorded at each table import

07114221328409-1809-2610-0410-1210-2010-2811-0511-06
IPv4 IPv6

Recorded changes

New prefixes and origin changes seen on the live stream

WhenChangePrefixOriginPath
2026-11-03 08:29:02Z new prefix 2607:fb92:1d00::/40 AS21928 T-Mobile USA, Inc. 4439320579464515655342047321928
2026-11-02 07:42:03Z origin change 208.54.1.0/24 AS21928 β†’ AS198949 557202914198949198949198949198949198949198949198949
2026-11-01 05:08:34Z origin change 208.54.1.0/24 AS21928 β†’ AS198949 3288403277271743356198949198949198949198949198949198949198949
2026-11-01 04:59:25Z origin change 208.54.1.0/24 AS198949 β†’ AS21928 37989563001321324657463721928
2026-11-01 04:59:25Z origin change 208.54.1.0/24 AS198949 β†’ AS21928 37989563001321324657463721928
2026-10-29 09:25:46Z new prefix 104.152.21.0/24 AS21928 T-Mobile USA, Inc. 49134533566424646121928219282192821928
2026-10-28 21:04:35Z origin change 208.54.1.0/24 AS21928 β†’ AS198949 35493356198949
2026-10-28 21:04:19Z origin change 208.54.1.0/24 AS21928 β†’ AS198949 205141299198949198949198949198949198949198949198949
2026-10-28 21:04:18Z origin change 208.54.1.0/24 AS198949 β†’ AS21928 37989563001321324657463721928
2026-10-28 21:04:18Z origin change 208.54.1.0/24 AS198949 β†’ AS21928 37989563001321324657463721928
2026-10-28 21:04:01Z origin change 208.54.1.0/24 AS21928 β†’ AS198949 14035773356198949
2026-10-28 21:03:59Z origin change 208.54.1.0/24 AS198949 β†’ AS21928 46081221463721928
2026-10-28 20:23:58Z origin change 208.54.1.0/24 AS21928 β†’ AS198949 49432483621299198949
2026-10-28 20:23:58Z origin change 208.54.1.0/24 AS21928 β†’ AS198949 491345335669391299198949