Beautiful Virgin Islands

Monday, Oct 06, 2025

Tool checks phone numbers from Facebook data breach

Tool checks phone numbers from Facebook data breach

People can now enter their phone numbers into a website to see if they appeared in a recent Facebook data breach.

Details of more than 530 million people were leaked in a database online, largely consisting of mobile numbers.

People can use the Have I Been Pwned online tool to check if their numbers or emails were compromised.

Facebook says the data is from an “old” breach in 2019 but privacy watchdogs are now investigating.

The data


Facebook said it had "found and fixed" the breach more than a year-and-a-half ago.

But the information has now been published for free in a hacking forum, making it widely available.

The database covers 533 million people in 106 countries, according to researchers analysing the data. That includes 11 million Facebook users in the UK, 30 million Americans and 7 million Australians.

Not every piece of data is available for each user but 500 million phone numbers were leaked compared with “only a few million email addresses”, Troy Hunt, a security expert who runs HaveIBeenPwned said in a blog on his website.

'Not just a tiny slice of people'


Mr Hunt launched the phone number search function after “unprecedented traffic” to the website, following the news of the Facebook data leak.

Previously, users of the platform could only search for email addresses.

Visitors to the website can now enter their mobile number into a search box, and the website will confirm if it has appeared in the leaked database.

“I wanted to ensure Have I Been Pwned could answer that question for everyone, not just a tiny slice of people,” Mr Hunt told the BBC.

It has also been suggested that Facebook’s own chief executive, Mark Zuckerberg, had his mobile number leaked in the database.

"This is the number associated with his account from the recent Facebook leak," security expert Dave Walker tweeted, along with a screenshot of Zuckerberg's leaked phone number.


The screenshot also suggests Mr Zuckerberg was on messaging platform Signal - which uses end-to-end encryption and is not owned by Facebook.

Mark Zuckerberg's phone number was released in the leak, experts have suggested

Facebook has requested users input their phone numbers since 2011, citing security reasons.

It allows for “two-factor authentication”, an additional feature that sends a text to a user’s mobile whenever somebody logs into their account.

But the tech giant has not elaborated on the recent leak, beyond saying the “old data” was "found and fixed" in August 2019.

Facebook are yet to put out a clear position on this,” Mr Hunt added. “They've alluded to a 2019 incident being the root cause, but that doesn't go far enough to explain the data in circulation.

“There's a vacuum of information right now, and that vacuum is being filled with a lot of speculation.”

Facebook did not respond to the BBC’s request for comment.

Meanwhile, several investigations have been launched into Facebook by privacy watchdogs around the world.

Ireland's Data Protection Commission said it was working with the tech firm to establish if “the dataset referred to is indeed the same as that reported in 2019”.

The Philippines’ National Privacy Commission and Hong Kong’s Office of the Privacy Commissioner have also launched probes into the breach.


De'Graft was shocked by the data Facebook stored on him


Newsletter

Related Articles

Beautiful Virgin Islands
0:00
0:00
Close
Munich Airport Reopens After Second Drone Shutdown
France Names New Government Amid Political Crisis
Trump Stands Firm in Shutdown Showdown and Declares War on Drug Cartels — Turning Crisis into Opportunity
Surge of U.S. Billionaires Transforms London’s Peninsula Apartments into Ultra-Luxury Stronghold
Pro Europe and Anti-War Babiš Poised to Return to Power After Czech Parliamentary Vote
Jeff Bezos Calls AI Surge a ‘Good’ Bubble, Urges Focus on Lasting Innovation
Japan’s Ruling Party Chooses Sanae Takaichi, Clearing Path to First Female Prime Minister
Sean ‘Diddy’ Combs Sentenced to Fifty Months in Prison Following Prostitution Conviction
Taylor Swift’s ‘Showgirl’ Launch Extends Billion-Dollar Empire
Trump Administration Launches “TrumpRx” Plan to Enable Direct Drug Sales at Deep Discounts
Trump Announces Intention to Impose 100 Percent Tariff on Foreign-Made Films
Altman Says GPT-5 Already Outpaces Him, Warns AI Could Automate 40% of Work
Singapore and Hong Kong Vie to Dominate Asia’s Rising Gold Trade
Trump Organization Teams with Saudi Developer on $1 Billion Trump Plaza in Jeddah
Manhattan Sees Surge in Office-to-Housing Conversions, Highest Since 2008
Switzerland and U.S. Issue Joint Assurance Against Currency Manipulation
Electronic Arts to Be Taken Private in Historic $55 Billion Buyout
Thomas Jacob Sanford Named as Suspect in Deadly Michigan Church Shooting and Arson
Russian Research Vessel 'Yantar' Tracked Mapping Europe’s Subsea Cables, Raising Security Alarms
New York Man Arrested After On-Air Confession to 2017 Parents’ Murders
U.S. Defense Chief Orders Sudden Summit of Hundreds of Generals and Admirals
Global Cruise Industry Posts Dramatic Comeback with 34.6 Million Passengers in 2024
Trump Claims FBI Planted 274 Agents at Capitol Riot, Citing Unverified Reports
India: Internet Suspended in Bareilly Amid Communal Clashes Between Muslims and Hindus
Supreme Court Extends Freeze on Nearly $5 Billion in U.S. Foreign Aid at Trump’s Request
Archaeologists Recover Statues and Temples from 2,000-Year-Old Sunken City off Alexandria
China Deploys 2,000 Workers to Spain to Build Major EV Battery Factory, Raising European Dependence
Speed Takes Over: How Drive-Through Coffee Chains Are Rewriting U.S. Coffee Culture
U.S. Demands Brussels Scrutinize Digital Rules to Prevent Bias Against American Tech
Ringo Starr Champions Enduring Beatles Legacy While Debuting Las Vegas Art Show
Private Equity’s Fundraising Surge Triggers Concern of European Market Shake-Out
Colombian President Petro Vows to Mobilize Volunteers for Gaza and Joins List of Fighters
FBI Removes Agents Who Kneeled at 2020 Protest, Citing Breach of Professional Conduct
Trump Alleges ‘Triple Sabotage’ at United Nations After Escalator and Teleprompter Failures
Shock in France: 5 Years in Prison for Former President Nicolas Sarkozy
Tokyo’s Jimbōchō Named World’s Coolest Neighbourhood for 2025
European Officials Fear Trump May Shift Blame for Ukraine War onto EU
BNP Paribas Abandons Ban on 'Controversial Weapons' Financing Amid Europe’s Defence Push
Typhoon Ragasa Leaves Trail of Destruction Across East Asia Before Making Landfall in China
The Personality Rights Challenge in India’s AI Era
Big Banks Rebuild in Hong Kong as Deal Volume Surges
Italy Considers Freezing Retirement Age at 67 to Avert Scheduled Hike
Italian City to Impose Tax on Visiting Dogs Starting in 2026
Arnault Denounces Proposed Wealth Tax as Threat to French Economy
Study Finds No Safe Level of Alcohol for Dementia Risk
Denmark Investigates Drone Incursion, Does Not Rule Out Russian Involvement
Lilly CEO Warns UK Is ‘Worst Country in Europe’ for Drug Prices, Pulls Back Investment
Nigel Farage Emerges as Central Force in British Politics with Reform UK Surge
Disney Reinstates ‘Jimmy Kimmel Live!’ after Six-Day Suspension over Charlie Kirk Comments
U.S. Prosecutors Move to Break Up Google’s Advertising Monopoly
×