Telephone numbers in the Dominican Republic use area code 809 with 829 and 849 as overlay codes. Telecommunications in the Dominican Republic use the North American Numbering Plan (NANP) country code, 1, followed by the area code in the same form as an internal area code in other NANP countries, such as the US and Canada.The area codes 809, 829 and 849 are telephone area codes solely for the Dominican Republic. Following Saint Vincent and the Grenadines' leaving 809 in 1999, no other countries use the legacy 809 area code. When in the Dominican Republic, the 3-digit area code followed by the 7-digit phone number must be dialed. When calling the Dominican Republic from the United States or Canada, this must be prefixed by the digit "1". From other countries the international prefix used in the originating country must be dialled before the "1".