In April, Chipotle announced that its payment system had likely fallen victim to hackers and that customer credit card information was at risk. Now, following an investigation of all credit card transactions that occurred between between March 24 and April 18, the burrito chain has confirmed that “most” of its locations across the country were affected, CNNMoney reports.

In short, if you ate at a Chipotle at any time during those dates, there’s a strong chance that the massive data breach compromised your credit card. As Lifehacker reports, the damage doesn’t end there: Pizzeria Locale, a fast-casual pizza chain operated by Chipotle, was also hacked. (Currently, the chain only has seven locations, so the fallout isn’t as widespread.)

In a blog post published last Friday, Chipotle confirmed that the hackers got their hands on customers' “track data,” a.k.a. the information that’s stored on a credit card’s magnetic strip. Track data can consist of a cardholder’s name, along with their card number, the expiration date, and its internal verification code. Chipotle says there is “no indication that other customer information was affected."

Wondering whether you visited one of the affected restaurants? Chipotle's blog post contains an online tool to help you find out. Scroll to the bottom of the page, choose your state and city, and you’ll be provided with a list of restaurant locations. Still have questions? Call 888-738-0534 during a weekday between the hours of 9 a.m. and 9 p.m.

[h/t CNNMoney]