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NTT West group call-centre data theft

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Made public · 9,280,000 people

What leaked7

Replaceable

  • Card number

Hard to replace

  • Mobile number
  • Home or delivery address

Permanent

  • Date of birth
  • Full name
  • Gender
  • Partial date of birth or age
  • Card number81 records from two client companies
  • Date of birthin some records · NTT West's own customers
  • Mobile numberphone number · landline or mobile
  • Genderin some records
  • Partial date of birth or ageage, in some records

To-dos3 · about 30 min in all

  1. Know the scam pattern: calls and texts that cite these leaked detailsabout 5 minfreeLimits harm from: scam calls, phishing messages
  2. Turn on instant transaction alertsabout 5 minHelps you notice: scam calls
  3. Remove your address and phone from public profiles and tighten SNS privacyabout 20 minfreeLimits harm from: visits or contact at home

What happened next25 events

  1. Undetected 2 eventsabout 10 yr 0 mo · show events
  2. Response 14 eventsNotice in 211 days · show events
  3. RemedyNone on record
  4. Penalty 6 eventsOngoing · Back to latest
  5. Disputes 3 eventsOngoing · show events

Penalty: 6 events

Back to latest
  1. PPC said it would file a criminal complaint against list broker Chuo Business Service for a false report to the commission
  2. PPC found that ProCX and NTT Business Solutions had made progress on the recommendation; the data had been sold to two list brokers, which received guidance
  3. PPC inspected the two list brokers that had bought the data · June 19, 2024 and 06-20
  4. MIC gave NTT West written administrative guidance on supervising its contractors
  5. PPC issued a recommendation (Art. 148) and guidance to ProCX and NTT Business Solutions over security-control failures, including the improper 2022 investigation report
  6. PPC ordered ProCX and NTT Business Solutions to report on the leak · Art. 146
Company
NTT West
When it happened
–
Company detected it
Made public
Notice
Leak confirmed
Affected
9,280,000 people · customers and residents of 69 client companies and local governments; ProCX December 19, 2023, PPC: about 9.28 million

How the facts developed

  1. Revised to 9.28 million records of 69 clients; 1.17 million could not be linked to a client and were notified by letter from February 2024
  2. About 9 million records of 59 clients announced; NTT West's own customers about 1.2 million

Sources