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Saint Martin country code +590 / +1-721 — call Saint Martin & get a number.
Saint Martin is barely 34 square miles, yet it runs on two different country codes, two currencies, and two telecom regulators — because it's actually two countries sharing one island. French Saint-Martin uses +590 (shared with Guadeloupe and Saint-Barthélemy); Dutch Sint Maarten uses +1-721 as part of the North American Numbering Plan. Here's how to dial both sides correctly, and how to cover the whole island with one platform.
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Saint Martin at a glance
The numbers and facts you need before you dial.
What is the country code for Saint Martin?
Most 'country code' pages describe a single nation. Saint Martin breaks that pattern immediately: there is no single 'Saint Martin country code,' because there is no single Saint Martin as a telecom jurisdiction.
The island — about 34 square miles total — is split roughly in half by an invisible land border with no fences, checkpoints, or walls. Cross it on foot or by car and you won't notice, but your phone will. Walk from Marigot into Philipsburg and your handset can silently jump from a French mobile network billing in euros to a Dutch Caribbean network billing in guilders or dollars, from an ARCEP-regulated numbering plan to a BTP-regulated one, and from the +590 country code to +1-721.
This isn't a quirky footnote — it's the single most important fact for any business trying to reach customers, staff, or partners on the island. A phone number that works perfectly on the French side may not be a natural fit for someone based on the Dutch side, and vice versa. Anyone building a presence on Saint Martin needs to think of it as two connected but distinct telecom markets, not one.
Code +590 / +1-721 was assigned to Saint Martin by the ITU under the E.164 plan. The “+” means “dial your local international exit code”; on a mobile, press and hold 0 to type it.
All four mean the same thing — they connect your call to Saint Martin.
How to call Saint Martin from anywhere
Because Saint Martin uses two different country codes, dialing depends on which side you're reaching. Calling the French side from abroad uses +590 followed by the local subscriber number (the French overseas convention repeats the 590 prefix inside the local number). Calling the Dutch side uses +1 721 followed by the 7-digit NANP-style subscriber number. Even a call from Marigot to Philipsburg is technically an international call — because the two sides use different country codes — even though it may travel only a few miles.
Full example: +590 / +1-721 590 XXX XXXX — drop the local leading 0 when calling from abroad.
Saint Martin phone number format explained
French Saint-Martin numbers follow the French overseas format: +590 590 XX XX XX for fixed lines, +590 690 XX XX XX for mobile (the French overseas mobile prefix). Dutch Sint Maarten numbers follow standard NANP structure: +1 721 XXX XXXX for both fixed and mobile, with numbers distinguished by their central office code block rather than by a different leading digit. Toll-free numbers are not standardized island-wide — French toll-free uses 08XX prefixes nationally, while NANP toll-free 8XX prefixes can terminate on the Dutch side but are typically US/Canada-issued.
Landline
French: +590 590 XX XX XX (fixed-line) · Dutch: +1 721 542/543 XXXX (Philipsburg-area prefixes)
Mobile
French: +590 690 XX XX XX (overseas mobile prefix) · Dutch: +1 721 5XX XXXX (NANP mobile block)
Saint Martin area codes — major cities
Drop the local leading 0 when calling from abroad.
| City | Region | Area code |
|---|---|---|
| Marigot (French) | Saint-Martin (+590) | 590 |
| Grand Case (French) | Saint-Martin (+590) | 590 |
| French Lowlands | Saint-Martin (+590) | 590 |
| Philipsburg (Dutch) | Sint Maarten (+1-721) | 721 |
| Simpson Bay (Dutch) | Sint Maarten (+1-721) | 721 |
| Cole Bay (Dutch) | Sint Maarten (+1-721) | 721 |
Saint Martin mobile network prefixes
The prefix after +590 / +1-721 tells you which network issued the SIM — though number portability means it no longer guarantees the operator.
Orange Caribbean (French +590)
Digicel (French +590)
Dauphin Telecom (French +590)
TelCell (Dutch +1-721)
Chippie (Dutch +1-721)
UTS / Flow (Dutch +1-721)
Saint Martin time zone
Both sides of Saint Martin share Atlantic Standard Time (AST), UTC-4, year-round — no daylight saving on either side. That means the island's offset from Europe shifts by an hour depending on the season in Paris and Amsterdam (which observe DST), while its offset from the US East Coast only shifts during US daylight saving time.
The shared time zone at least simplifies scheduling even where the dialing does not — a call to a Marigot villa manager and a Philipsburg marina office is one time-zone calculation for both.
Emergency numbers in Saint Martin
Free to call from any Saint Martin phone, landline or mobile.
Common mistakes when calling Saint Martin
Almost every failed international call is a formatting issue, not a network issue.
Assuming 'Saint Martin' has one country code
Businesses frequently list a single +1-721 or +590 number and assume it covers 'the island' — missing half their addressable market. There is no single unified Saint Martin country code.
Treating a Marigot-to-Philipsburg call as free or local
Because the two sides use entirely different country codes, calls between them are billed as international by most carriers, even over a distance of a few miles.
Confusing the currency and billing side
Quoting euro pricing to a Sint Maarten-based customer (or guilder/dollar pricing to a Saint-Martin-based one) creates friction and signals unfamiliarity with the market.
Assuming EU telecom rules apply island-wide
Intra-EU roaming caps and other EU telecom protections apply only to the French side; the Dutch side sits outside EU telecom regulation entirely, since Sint Maarten is a Kingdom of the Netherlands country rather than an EU member state.
Expecting emergency numbers to route across the internal border
A call to 112 from the Dutch side, or to 911 from the French side, will typically not reach the correct dispatcher. Visitors and staff working near the border should know which side they are physically standing on.
Tips to reduce the cost of calling Saint Martin
Get both a +590 and a +1-721 number for full-island coverage
A business serious about the island typically needs both — anything less means half of Saint Martin sees you as a long-distance call.
Route each number to the right team
French-speaking staff for +590 inbound, English-speaking (or Dutch) for +1-721 — a single virtual-number platform can split calls by number without separate physical infrastructure per jurisdiction.
Match currency to the side of the island the customer is on
Euro pricing for Saint-Martin, USD or ANG for Sint Maarten — same product, two invoices.
Build in hurricane resilience
Cloud-routed virtual numbers on both sides survive local carrier outages better than lines physically tied to one side's infrastructure — worth planning for in this region.
Why businesses get a Saint Martin virtual number
The France/Netherlands border running through Saint Martin traces back to a 1648 agreement (the Treaty of Concordia), making it one of the oldest continuously shared land borders in the world. That centuries-old treaty is why the island's economy runs on two currencies, two legal systems, and — the part that matters here — two telecommunications regimes. For a market this size, that's an unusual amount of regulatory duplication, and it directly shapes how a business should set up its phone presence. Hotels, villas, charter operators, and tour companies serving both sides benefit from having local-format numbers on each — anything less means half the addressable market sees you as an international call.
Genuine dual-market coverage
A business serious about the island typically needs both a +590 number for the French side and a +1-721 number for the Dutch side — anything less means half of Saint Martin sees you as a long-distance call.
Local trust and answer rates
Local-format numbers on each side reassure callers they're reaching a business that understands their specific jurisdiction, currency, and language norms.
Tourism and hospitality demand
Saint Martin's economy is heavily tourism-driven on both sides; hotels, villas, charter operators, and tour companies benefit from letting guests reach them on a familiar local number regardless of which side of the island they're contacting from.
Simplified back-office operations
Instead of maintaining separate physical lines, SIMs, and contracts with a French carrier and a Dutch Caribbean carrier, a single virtual number platform can issue and manage both number types centrally.
Resilience against single-network outages
Hurricane exposure is significant in this region; having numbers and routing that aren't tied to one physical carrier on one side of the island adds continuity if local infrastructure is disrupted.
One dashboard for two jurisdictions
Route calls, monitor analytics, and manage both +590 and +1-721 numbers from a single MCM account — no duplicated vendor relationships.
Saint Martin virtual numbers with My Country Mobile
MCM lets you provision and manage both sides of Saint Martin's split numbering system from one dashboard — get local-format virtual numbers for +590 (French Saint-Martin) and +1-721 (Dutch Sint Maarten) side by side, and route calls to any device, team, or country without separate physical infrastructure per jurisdiction.
Local DIDs in major area codes — provisioned in minutes
Call forwarding to any mobile, landline, SIP endpoint, or softphone worldwide
HD voice with G.711, G.729, Opus & AMR-WB — auto-negotiated per call
Sub-150ms latency on major voice corridors via distributed PoPs
99.99% uptime SLA backed by geo-redundant infrastructure & sub-2s failover
WebRTC support for browser-based calling without softphone installs
REST APIs for provisioning, routing & call detail records (CDRs)
Built-in fraud protection with AI anomaly detection & STIR/SHAKEN
24/7 network monitoring and dedicated support
How to get your Saint Martin virtual number
Most businesses are live within hours, not days.
Decide your coverage need: +590, +1-721, or both, based on where your customers, staff, or partners are physically located on the island.
Choose your number type(s) — local-format virtual numbers for each side you need to cover, from the MCM dashboard.
Set up call routing to point incoming calls on each number to the team, device, or IVR flow appropriate for that side of the island.
Go live and monitor — activate the number(s) and use MCM's analytics to track call volume and performance separately for the French and Dutch sides.
Other country dialing guides
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Get a Saint Martin virtual number with MCM
Cover both sides of the island from one account — start your free trial and claim your +590 and +1-721 numbers today.
Saint Martin +590 / +1-721 — FAQ
Does Saint Martin have one country code or two?expand_more
Two. French Saint-Martin uses +590 (the same code shared with Guadeloupe and Saint-Barthélemy), while Dutch Sint Maarten uses +1-721 as part of the North American Numbering Plan. There is no single unified 'Saint Martin' country code.
Why does the Dutch side use a NANP code if it's in the Caribbean, not North America?expand_more
The North American Numbering Plan extends to many Caribbean nations and territories with historic ties to the US/Canadian telecom system, regardless of continental geography. Sint Maarten is one of several Caribbean NANP members alongside places like Jamaica, the Bahamas, and Anguilla.
Is a call from the French side to the Dutch side of the island a local call?expand_more
No. Even though the two sides are a few miles apart, they use different country codes, so a call between them is typically billed as an international call by most carriers.
What currency does each side of Saint Martin use?expand_more
French Saint-Martin uses the euro, as an Outermost Region of the European Union. Dutch Sint Maarten uses the Netherlands Antillean guilder, though US dollars are also widely accepted; a 'Caribbean guilder' has been proposed as a future replacement for the guilder in the Dutch Caribbean.
Which regulator oversees phone numbers on each side?expand_more
ARCEP, the French national telecom regulator, oversees the French side as part of France's overseas telecom framework. The Bureau Telecommunication and Post (BTP) oversees numbering and telecom licensing on the Dutch side.
Do I need two different virtual numbers to cover the whole island?expand_more
For genuine full-island coverage, most businesses get one +590 number for the French side and one +1-721 number for the Dutch side, since customers on each side expect a number format native to their jurisdiction.
What time zone is Saint Martin in?expand_more
Both sides of the island share Atlantic Standard Time (UTC-4) year-round, with no daylight saving time observed on either side.
How do I dial from the French side to the Dutch side?expand_more
Dial as an international call: from the +590 side, use 00-1-721-XXX-XXXX. Even a call travelling only a few miles will be billed as international by most carriers.