(note: if dialing the cell from within Mexico, do not dial the international country code 52 but add 044 before 958 if you are calling from a land-based phone, (if you are calling from another cell-phone in Mexico, do not dial 044). If you are calling a 958 number from Huatulco, do not use the 9 unless it is the access code from your hotel -- dropping 9 does not apply to a cell phone.)
The information below has been provided by participants.