Security News > 2021 > April > Have I Been Pwned adds search for leaked Facebook phone numbers
Facebook users can now use the Have I Been Pwned data breach notification site to check if their phone number was exposed in the social site's recent data leak.
This leak's main component is a Facebook user's phone number, rather than an email address, and thus Have I Been Pwned could not accurately alert a user if they were exposed in the breach.
"There's over 500M phone numbers but only a few million email addresses so >99% of people were getting a"miss" when they should have gotten a "hit"," Have I Been Pwned creator Troy Hunt explained in a blog post.
To more accurately alert users, Hunt has updated Have I Been Pwned so that users can now search for their phone numbers on the site to determine if the leak exposed their Facebook info.
If you wanted to check if your phone number was part of the Facebook data leak, you would need to use a search in the format '19175555555.
With this new feature added, Have I Been Pwned has become a valuable tool for Facebook members to determine if the data leak exposed their data.