via The Verge, 'By now, you have probably heard ofthe huge Facebook data breach, in which upwards of 533 million Facebook users from 106 countries had personal data leaked online, including phone numbers, Facebook IDs, birthdates — you name it.
Your first question will be, of course, how to check whether you are part of that breach. There are a couple of places out there where you can find out whether your data has been compromised.
One well-known site that tracks data breaches isHave I Been Pwned. Just follow the link to the site and put in your email address or phone number. You will find out not only if you’ve been part of the Facebook breach, but also any other breaches in which your data may have been compromised.
Troy Hunt, creator of Have I Been Pwned, was considering whether to include a phone number search (as this comes with certain privacy risks), but ultimately decided to add the feature:'