@Simon2627 I don't understand your question. What do you mean "What do I do?" In what regard? Are you concerned that the guest isn't being truthful about where they are from?
A guest from Puerto Rico could easily have a number with an Orlando area code. Many phone plans these days make it easy to use the same number in many places. Mexicans may have a phone number from the other side of Mexico than where they currently live, because they moved from there. But since you can call everywhere in Mexico without long distance charges, there's no need for them to get a new local number. There are many US and Canadians who live here most of the year and yet use their US or Canadian number here.
But it is a good idea to make sure the guest's phone number as listed on their account is current, so just ask the guest if it is. I've had a couple of guests who had failed to update their phone number on their account when it changed, so I couldn't phone them.