Country Code: +507
All telephone numbers in Panama are seven or eight digits long (xxx-xxxx or 6xxx-xxxx) and there are no area codes. However, the first digit(s) will tell you something about where the phone is (if it is a land-line) or else if it is a mobile phone.
Telephone numbers in Panama Wikipedia
The following table lists the first digit for locations of land-lines:
The following three-digit numbers are also in use: