California State AG
Clustered 8 filings across 8 jurisdictions · filing window Apr 9, 2024 → Apr 25, 2024. View entity profile → Other incidents for this victim →
incident inc_960ca9f652bf4bec · merge_method deterministic · confidence 100%
Discovered → first regulatory filing
Range of discovered_at dates across filings
CA DE IN MT NH OR VT WA
Time between earliest and latest filing
Not recorded for this incident
Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster.
all State AG
per-filing reported counts
State AGs report only their own residents; bars show per-filing counts.
Earliest sighting first · deep chronology in Litigation Timeline
8 filings across 8 jurisdictions · Apr 9, 2024 – Apr 25, 2024 · 2 milestones
Jun 1, 2019 → Jun 30, 2019
When the intrusion reportedly occurred, per the linked filings
Mar 26, 2024
Reported by CALIFORNIA AG, VERMONT AG, WASHINGTON AG, DELAWARE AG filings
About this clustering
DisclosureLens links filings into incidents through layered matchers: deterministic rules (same source document, multistate filings of one breach, tight-window same-victim pairs), a weighted-similarity scorer for cross-source candidates, and an operator review queue for everything uncertain. Each link records its own method and confidence — shown per filing in the timeline below. The system defaults to NOT merging when uncertain, because a false merge (collapsing two unrelated breaches) is more harmful than a false split (showing related filings separately); uncertain pairs route to human review instead of auto-merging. Filing summaries shown in the timeline are AI-generated extracts — verify each against its linked source.
AT&T Inc. notified customers that their personal information was compromised after appearing in a dataset released on the dark web on March 17, 2024. AT&T determined customer data was included on March 26, 2024. Affected data may include name, email, address, phone, SSN, DOB, account number, and passcode. Data dates from June 2019 or earlier. AT&T reset passcodes and offered credit monitoring.
AT&T Inc. reported a data breach to the Montana Attorney General. The breach was reported on 2024-04-09. The breach occurred on 3/26/2024. 70,747 Montana residents were affected.
Affected (this filing): 70,747
AT&T notified consumers of a data breach where customer information was found in a dataset released on the dark web on March 17, 2024. The data, originating from June 2019 or earlier, included names, contact info, SSNs, and account credentials. AT&T reset passcodes for affected accounts and offered one year of credit monitoring via Experian.
AT&T Inc reported a data breach to the Indiana Attorney General. 1,437,078 Indiana residents were affected. 51,226,382 individuals affected in total.
Affected (this filing): 51,226,382
AT&T Inc., a business sector entity reported a theft or mistake incident to the Washington Attorney General. The organization became aware of the incident on 2024-03-26 and filed notice on 2024-04-10. 378,471 Washington residents were affected. 15 days elapsed between awareness and notification. 0 days to identify the breach. 0 days to contain the breach.
Affected (this filing): 378,471
AT&T Inc. reported a data breach to the Oregon Attorney General. The breach was reported on 2024-04-10. 51,226,382 individuals were affected.
Affected (this filing): 51,226,382
AT&T Inc. notified the New Hampshire Attorney General on April 9, 2024, regarding a data set released online containing personal information of New Hampshire residents. The incident involved unauthorized access to a cloud storage bucket, resulting in the exfiltration of customer data. AT&T engaged Gibson Dunn for legal and forensic assistance and has contained the incident.
AT&T notified customers that their personal information (names, SSNs, DOBs, account numbers, passcodes) was found in a dataset released on the dark web on March 17, 2024. The data originated from June 2019. AT&T reset affected passcodes and offered one year of credit monitoring via Experian. The incident status is contained.