T-Mobile
Disclosed Dec 31, 201312 years agoConfirmed
What is known
| People affected | Not stated in the sources we have |
|---|---|
| Disclosed | Dec 31, 2013 |
| Attack | Not stated |
| Data exposed | Names, Social Security numbers, Government IDs, Addresses, Names |
| Sector | Telecom · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| Maine Attorney General breach notice archive: T-Mobilemaine.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| Maine AGresidents of ME | Dec 31, 2013 | 15 |
Other breaches at T-Mobile
| Breach | Affected | ||||
|---|---|---|---|---|---|
| Disclosed Aug 29, 2025Aug 29, 20251 year ago | Aug 29, 20251 year ago | Not stated | Telecom | Confirmed | 2 |
| Abused API leaks account data of 37 million T-Mobile customersJan 19, 20233 years agoHacking | Jan 19, 20233 years ago | Hacking | Telecom | Confirmed | 37M |
| Cyberattack steals data of tens of millions of T-Mobile customers and applicantsOct 9, 20205 years agoHacking | Oct 9, 20205 years ago | Hacking | Telecom | Settled | 54M |
History of this record
- 2026-09-25 · added · backfill source
First seen 2026-09-25 (Maine AG), confirmed by Maine AG. Record counts are as reported. Not legal advice.