norm: telephone data systems inc deNAICS Telephone Communications (No Radiotelephone) · USno LEI · CIK 0001051512Max severity: Medium

Canonical registry

TELEPHONE & DATA SYSTEMS INC /DE/

ent_019fa23312ed419fabb4bc6f896aba5a

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Disclosures

Leak Site · 1 jurisdiction

Multi-filing incidents

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no multi-filing incident in sample

Max affected reported

—

no filed count in sample

Leak-site claims

unverified actor claims

Identity resolution

Canonical name: TELEPHONE & DATA SYSTEMS INC /DE/
Normalized: telephone data systems inc de— dedupe via name-norm; Microsoft / MSFT collapse to one row
GLEIF LEI: No match
SEC EDGAR CIK: 0001051512
Domain: tds.net

Unverified threat-actor claim — not a regulatory filing

Attribution, victim identity, and counts shown here derive from a threat actor's public extortion-blog claims, aggregated by ransomware.live. They have not been validated by the victim or any regulator. Treat them as the threat actor's assertion until a regulatory filing or victim disclosure corroborates them.

Disclosure history (1)newest first

GLOBALLeak Siteas victim2026-05-08
tdstelecom.com TDS Telecommunications LLC, founded in 1969 and headquartered in Madison, Wisconsin, is a leading U.S. telecommunications provider serving residential and business customers across urban, suburban, and rural communities. The company delivers high-speed fiber-optic internet (up to 8 Gigabit), IP-based TV entertainment, and traditional phone services, alongside business solutions like VoIP, dedicated internet, and data networking. With over 1.1 million connections, TDS is a wholly owned subsidiary of Telephone and Data Systems, Inc. (NYSE: TDS), committed to enhancing communities through reliable, innovative communications technology.

Subsidiary disclosures (1)filed by group companies

◈ These filings were made by or about subsidiaries of TELEPHONE & DATA SYSTEMS INC /DE/ — not by TELEPHONE & DATA SYSTEMS INC /DE/ itself. Corporate relationships are mapped from GLEIF relationship records and SEC Exhibit 21 filings.

Tracked subsidiaries✦ TDS Telecommunications LLC.

GLOBALLeak Sitevia TDS Telecommunications LLC.2026-10-29
Country: Madison, Wisconsin, US | Website: tdstelecom.com | Revenue: $1.30 Billion | Industry: Telecommunications, Internet Service Providers | Employees: 3,000-5,000 | Properties: 27.4 GB (79,679 Files, 1,943 Folders)