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Have a Chase account? Change your passwords right now.

JPMorgan Chase, the biggest bank in the U.S., told regulators on Thursday that a previously disclosed data breach affected 76 million households and 7 million small businesses, Bloomberg News reports.

Customer names, addresses, phone numbers and e-mail addresses were taken by unidentified hackers, the company said in a security filing. 

“There is no evidence that account information for such affected customers — account numbers, passwords, user IDs, dates of birth or Social Security numbers — was compromised during this attack,” the company told Bloomberg News.

The data breach affects a huge number of Americans: According to the U.S. Census Bureau, there are around 117 million households in the country, meaning 64% of households were affected by the breach. The breach hit "anyone who visited the company’s websites, including, or used its mobile app," according to a Bloomberg News source.

JPMorgan executives are flipping out, according to the New York Times: "The new details about the extent of the hack — which began in June but was not discovered until July — sent JPMorgan scrambling for the second time in just three months to contain the fallout ... As the severity of the hack became more clear in recent days and new information was unearthed, some top executives flew back to New York from Naples, Fla., where many had convened for a leadership conference."

Concerned yet? Good. Stop what you're doing, call your bank, and change all your information right now.