Calling Sint Maarten
from the United States explained:
1 - North American long distance prefix
721 - area code assigned to Sint Maarten
local phone number - 7 digits
US to Sint Maarten international dialing format:
1 721 ??? ????
this country is in the North American Numbering
Plan (calling it works like a US long distance call)...however,
international or sometimes unexpected charges may apply when calling numbers in area code 721!