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

Cyber criminals have accessed sensitive information — including names, social security numbers, birth dates, addresses, and the numbers of some driver’s licenses.

Additionally, Equifax said that credit card numbers for about 209,000 U.S. customers were exposed, as was “personal identifying information” on roughly 182,000 U.S. customers involved in credit report disputes. Residents in the U.K. and Canada were also impacted.

The breach occurred between mid-May and July, Equifax said. The company said it discovered the hack on July 29.

The data breach is one of the worst ever, by its reach and by the kind of information exposed to the public.

CLICK HERE TO CHECK IF YOUR PERSONAL INFORMATION WAS STOLEN FROM EQUIFAX

Equifax is one of three nationwide credit-reporting companies that track and rates the financial history of U.S. consumers. The companies are supplied with data about loans, loan payments and credit cards, as well as information on everything from child support payments, credit limits,missed rent and utilities payments, addresses and employer history, which all factor into credit scores.