Saint Martin is +590
A local writes 0690 12 34 56 — the dialer below turns that into what you press.
The French side of the island shares country code 590 with Guadeloupe and Saint-Barthélemy. The leading zero is a trunk digit dropped from abroad, so 0690 12 34 56 answers to +590 690 12 34 56, and 00 gets an international line. Mind the border: Dutch Sint Maarten is a NANP territory on +1 721, so crossing the street changes the dialing plan entirely.
Ten digits in the French style: fixed lines start 0590, mobiles 0690 or 0691, written in pairs.
You dial
011 590 690123456
011 exits United States · 590 reaches Saint Martin · the leading 0 stays home. From any mobile, +590 690123456 works worldwide.
Type the number the way a local writes it — the arithmetic is derived from each country's ITU plan.
Plan facts verified against ITU-T E.164 assigned country codes · Telephone numbers in Guadeloupe — Wikipedia. Prose is our own.
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