In all, 216 Jimmy John's stores were breached, and those are scattered far and wide. That's why Jimmy John's has created a site where you can quickly see what stores in your area were hit.
Click here and type in your city name to see if stores in your area were affected and the danger period for those stores. Just remember that the search is very specific. If you live in a metro area with lots of fuzzy city borders, you might want to search by state to make sure you're seeing every store in your area.
I checked the greater Phoenix area, and while we have more than 40 Jimmy John's stores only 8 were hit. So if you're a Jimmy John's patron, that might be a load off your mind. Of course, you'll still want to keep an eye on your bank statements.
Really, though, there are too many breaches happening to keep track of or protect yourself against, and I know more are going to be on the way. That's why I recommend getting identity theft protection, and I have just the service.