The NANPA newsletter for the 2nd quarter of 2008 mentions that Sint
Maarten, part of the Netherlands Antilles, has applied to join the
North American Numbering Plan. Sint Maarten encompasses the southern
half of the island of Sint Maarten/Saint-Martin - the northern half
and some neighbouring islets belong to France. The newsletter goes on
to say that NANPA is seeking input regarding this application for an
upcoming presentation to the Industry Numbering Committee.
Sint Maarten is one of the five "island areas" of the Netherlands
Antilles, which uses country code 599. Local telephone numbers in Sint
Maarten are seven digits long and begin with the digit 5, so the full
international format would be +599 5xxxxxx. The Netherlands Antilles
was scheduled to be dissolved on 15 December 2008, with Sint Maarten
and Curaçao becoming separate countries within the Kingdom of the
Netherlands, and the other islands (Bonaire, Saba and Sint Eustatius)
directly becoming part of the Netherlands as special municipalities.
This, however, has been postponed indefinitely. The Netherlands
Antilles are not part of the European Union and use their own
currency, the Antillean guilder.
St-Martin is an overseas collectivity of France, formerly administered
as part of Guadeloupe and still sharing country code 590. It is part
of the European Union, and uses the euro as its currency.
I recall reading somewhere that calls between the two halves of the
island must be dialled in full international format. That won't change
if Sint Maarten joins the NANP.