Data Breach Notifications

Entity Information

  • Type of Organization: Other Commercial
  • Entity Name: Telephone and Data Systems, Inc.
  • Street Address: 30 N. LaSalle Street, Suite 4000
  • City: Chicago
  • State, or Country if outside the US: IL
  • Zip Code: 60602

Submitted By

  • Name: Colleen Brown
  • Title: Partner
  • Firm name (if different than entity): Sidley Austin LLP
  • Telephone Number: 202.736.8465
  • Email Address: ctbrown@sidley.com
  • Relationship to entity whose information was compromised: Outside Counsel

Breach Information

  • Total number of persons affected (including residents): 99
  • Total number of Maine residents affected: 9
  • If the number of Maine residents exceeds 1,000, have the consumer reporting agencies been notified:
  • Date(s) Breach Occured: 01/20/2021
  • Date Breach Discovered: 06/02/2021
  • Description of the Breach:
    • External system breach (hacking)
  • Information Acquired - Name or other personal identifier in combination with: Social Security Number

Notification and Protection Services

  • Type of Notification: Written
  • Date(s) of consumer notification: July 2, 2021
  • Copy of notice to affected Maine residents: Sample Data Breach Notice Letter.pdf
  • Date of any previous (within 12 months) breach notifications: This filing supplements the June 23, 2021 portal filing for an updated final notice letter and mailing date
  • Were identity theft protection services offered: Yes
  • If yes, please provide the duration, the provider of the service and a brief description of the service: 24 months, Experian, credit monitoring