April 11, 2021

Check if your phone number was leaked; Facebook does not plan to notify half-billion users affected by data leak

On April 3rd, Business Insider reported that 533 million Facebook users’ phone numbers were leaked on a forum.1

On April 7th, Reuters reported that Facebook does not plan to notify the 533 million users affected by data leak.2 Facebook only published a blog post to report the issue.3

Since Facebook won’t tell you whether your phone number was leaked; you can search for yourself using Troy Hunt’s tool:

https://haveibeenpwned.com/

The existence of this database was first reported by CNET in September 2019.4 Data had been scraped because of a vulnerability, Facebook said.

Details leaked can include: Phone number, Facebook ID, full name, location, past Locations, birthdate, (sometimes) email address, account creation date, relationship status, bio.

credit: Alon Galcredit: Alon Gal

The information can be used to impersonate people, commit fraud, scam people or marketing. It is not clear yet what the risks are.


Hey, I’m writing a book to explain the nature of our relation with tech platforms” (e.g. Facebook, Google), and the impact our usage of platforms has on our autonomy, individuality, desire, and intimacy.


  1. 533 million Facebook users’ phone numbers and personal data have been leaked online, April 3rd, 2021, Business Insider↩︎

  2. Facebook does not plan to notify half-billion users affected by data leak, April 7th, 2021 Reuters↩︎

  3. The Facts on News Reports About Facebook Data, April 6th, 2021, Facebook Newsroom↩︎

  4. Database of Facebook user phone numbers is offline, September 7th, 2019, CNET↩︎


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