Credit reporting firm Equifax says a giant cybersecurity breach compromised the personal information of as many as 143 million Americans – almost half the country.

Cyber criminals accessed sensitive information – which includes names, social security numbers, addresses and the numbers of some driver’s licenses.

Equifax says the credit card numbers of about 209,000 U.S. customers were exposed – as was “personal identifying information” on roughly 182,000 U.S. customers involved in credit reporting disputes.

Residents in Canada and the U.K. were also affected by this breach – which occurred between mid-May and July – and was discovered on July 29th.