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Regulator-posted notice

Breach notice filed by T-Mobile USA (January 2023)

Organization named: T-Mobile USA Provisional: identity as filed, not yet matched to the directory

What the sources say

Washington Attorney General data breach notifications Primary notice

Posted on the Washington Attorney General data breach notifications with a submission date of Jan. 19, 2023.

Organization as reported
T-Mobile USA
Information types as reported
Name; Full Date of Birth; Other
Incident dates as reported
Nov. 25, 2022
Submission date
Jan. 19, 2023
Observed by BreachRecords
2026-10-19 04:57 UTC (revision 26007, page:18:row:16)
Archived copy
Held in the private archive (provenance)

The listing records a filing with the agency; it is not a finding by the agency.

Washington data breach notifications dataset (data.wa.gov sb4j-ca4h) Duplicate filing

Posted on the Washington data breach notifications dataset with a submission date of Jan. 19, 2023.

Organization as reported
T-Mobile USA, WA
Entity type as reported
Business
Category as reported
Unauthorized Access
Incident dates as reported
Nov. 25, 2022 to Jan. 5, 2023
Discovery date as reported
Jan. 5, 2023
Submission date
Jan. 19, 2023
Observed by BreachRecords
2026-11-01 20:03 UTC (revision 63106, row:822)
Extraction
Parsed from a document; extraction confidence 0.85
Archived copy
Held in the private archive (provenance)

The listing records a filing with the agency; it is not a finding by the agency.

Figures, per source

  • 772,593 individuals affected (residents of the reporting state), according to the Washington Attorney General data breach notifications, source date Jan. 19, 2023, revision observed 2026-10-19.
  • 772,593 individuals affected (residents of the reporting state), according to the Washington data breach notifications dataset, source date Jan. 19, 2023, revision observed 2026-11-01.

Each figure is one source's figure with the basis that source gave. Figures from different sources are shown side by side and are not added, averaged or chosen between.

Timeline

Source dates are the dates the sources give. Observation dates are when BreachRecords recorded each revision.

  • Submission date (Washington Attorney General data breach notifications)
  • Submission date (Washington data breach notifications dataset)
  • Observed by BreachRecords (revision 26007)
  • Observed by BreachRecords (revision 63106)
  • Approved by a reviewer

Organizations linked by a reviewer

  • T-Mobile USA Named as the filer Provisional: identity as filed, not yet matched to the directory Linked 2026-11-04, method manual.

Archived evidence

  • 264d45f73831ec8fc298837002b836f792a7cfd7f3d6b4d2128484a23223c042
    text/csv, 453,656 bytes, retrieved from Washington data breach notifications dataset, 2026-11-01 20:03 UTC. Archived privately · Provenance · Source page
  • 7b4dbf08c13c5d81cc8afcfad1fa7da9b993a03dd54ac45e1fe6a2597e9ce02e
    text/html, 154,435 bytes, retrieved from Washington Attorney General data breach notifications, 2026-10-19 04:57 UTC. Archived privately · Provenance · Source page

Records reflect source filings as of the dates shown. BreachRecords is not a regulator.

Request a correction

A record that disagrees with its source, names the wrong organization or duplicates another is corrected after review. This form is about Breach notice filed by T-Mobile USA (January 2023). We acknowledge every request within two business days. We reply by email.

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