TELEPHONE AND DATA SYSTEMS, INC. — January 2021 breach

Clustered 4 filings across 3 jurisdictions · filing window Jun 23, 2021 → Aug 3, 2021. View entity profile → Other incidents for this victim →

⚠ 1 cross-filing discrepancy →Merge100%

Determination

Confirmed

Members

4 filings

States

Affected · reported

First → last filing

Jun 23, 2021 → Aug 3, 2021

Merge confidence

100%

incident inc_e9b5ba0b2c434d10 · merged by deterministic · confidence 100%

Confirmed breach. Merged as one breach: 4 regulatory filings. The filings describe unauthorized access. Intrusion Jan 20, 2021, discovered Jun 2, 2021 — the first regulatory filing landed 21 days later. 99 individuals reported across the linked filings. Data reported: Government ID and Identity (basic). Notifications rolled out on a 41-day schedule across 4 filings beginning Jun 23, 2021. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Notification delay

21days

Discovered → first regulatory filing

Discovery variance

0days

Range of discovered_at dates across filings

Filing span

41days

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.

Regulatory clocksMaine⏱ ME AG >30d · 62dMassachusetts✓ MA credit monitoring dueFull clock table in Litigation Timeline

No cross-filing comparison data available for this incident.

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