According to Autozone's company policy they do not... any more.... they got sued for it, and now are not allowed to do it anymore....
kragens also will not loan or scan tools out in CA or HI http://shop.oreillyauto.com//Help/InStoreServices.aspx
Thats nice and all, but I had a code run on my ford not more than 2 weeks ago in vacaville. Used to have them run all the time in Sacramento, but that was a while ago. I'm not saying whether they do or not, but its always worth checking. The worse they can do is say no.