Telephone numbers in Curaçao and the Caribbean Netherlands
599 was assigned to the Netherlands Antilles, and is in use by Curaçao and the Caribbean Netherlands.
Aruba and Sint Maarten, also former parts of the Netherlands Antilles, discontinued using the code in 1986 and 2011 respectively. Aruba uses country code 297, and Sint Maarten joined the North American Numbering Plan with area code 721.
The International call prefix is 00.
Area codes
Originally each island had an area code with the length of the local numbering varying from island to island. Beginning in 1999, the numbers were modified so that each local number was seven digits long. This change left the islands without any area codes, except for Curaçao, which has the area code of 9 along with the seven digit local number.Sint Maarten joined NANP
On September 30, 2009, the North American Numbering Plan Administration approved the request of Sint Maarten's government to join the NANP with area code 721. Effective 30 September 2011, Sint Maarten's country code changed to the NANP code of 1. A permissive dialing period of one full year was in place when dialing or country code 599 could be used.Historic list of area codes and number ranges
| Island | Number range |
| Bonaire | 7xx xxxx 717 xxxx 750 xxxx 700 xxxx 701 xxxx 795 xxxx 796 5xxx |
| Curaçao | 9 4xx xxxx 9 5xx xxxx 9 6xx xxxx 9 7xx xxxx 9 8xx xxxx |
| Sint Maarten | 5xx xxxx |
| Saba | 416xxxx |
| Sint Eustatius | 3xx xxxx |
| Aruba | 8xx xxxx |
| Non-geographic | 1xx xxxx 6xx xxxx |