Palau's country code is 680; there are no area codes. All Palauan numbers have seven digits.
Palau National Communications Corporation offers GSM mobile phone service in most areas, and prepaid SIM cards are available for purchase. A SIM card package is US$25, including US$10 of calls. You can buy top-up cards everywhere. Local calls cost 22 cents per minute while international calls are 57 cents per minute.
Note that most foreign phones set up for global roaming won't work in Palau because PNCC doesn't have roaming agreements with foreign operators.