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T‐Mobile USA, Inc. / Experian

Disclosed Oct 1, 201515,100,000 affectedConfirmed

Official notice

What is known

People affected15,100,000 (as reported by the organization)
DisclosedOct 1, 2015
HappenedSep 14, 2015
AttackNot stated
Data exposedNot stated
SectorTelecom · US
StatusConfirmed

Sources

Notices filed

History of this record
Added2026-09-25
First recordedby backfillSource

First seen 2026-09-25 (Indiana AG), confirmed by Indiana AG. Record counts are as reported. Not legal advice.

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