The 721 area code belongs to Sint Maarten (Dutch part of St. Martin island) and some of the locations covered are Cul de Sac, Philipsburg and more:
| Country | Larger cities in area code 721 | Time Zone |
|---|---|---|
| Sint Maarten | Cole Bay, Cul de Sac, Little Bay, Philipsburg, Prince's Quarter, Simpson Bay | AST Current time is
06:01:30 PM |
Area code 721 was introduced on September 30, 2011 when Sint Maarten's phone system became part of the North American Numbering Plan. Previously this island nation had used country code 599 along with the other 5 islands formerly known as the Netherlands Antilles (Aruba, Bonaire, Curacao, Saba, Sint Eustatius). Only the southern (Dutch) part of Sint Maarten uses area code 721 within the NANP while the northern French territory, also known as Saint Martin uses country code 590.