A little google work will tell you that a great majority of states, accept the CCW permits from a great majority of other states. Of course the highly restrictive states do not reciprocate. The states that do accept other states CCWs still may have different carry laws that must be abided by. It is complicated, but the information is available. As far as I know, no state will allow you to carry concealed unless you have that state's or one of the partner state's license. An exception would be a state that has no permit necessary to carry.
Search for "fireams reciprocity" or something similar and you will get the answers you need.
"It is better to be too skeptical then too credulous"