Published: 17.10.2026
The .sx extension is the country-code domain of Sint Maarten, which occupies the southern part of the island of Saint Martin in the Caribbean. Hotels, shops, marinas and local services use it to show that they are based on the island. Dutch is the official language, and English is widely spoken in daily life and in tourism. Use the availability form just below this text to see whether your name in .sx is still available.
Check if a .sx domain is available .sx Check
A short history
The national code was assigned as the island connected to the global internet, and the zone was first used by government bodies, schools and early online services. Tourism has long been one of the main activities on the island, so many sites in the zone describe hotels, beaches, yachts and events. Over time local businesses of every size have adopted the ending as their address on the web.
Who runs it
The zone is managed by a registry operator that keeps the central list of names and publishes the registration policy. Accredited registrars sell names to customers and forward orders to the registry. Because the policy is set by the operator, read the current conditions for holders, contact details and renewal before you order.
Rules in practice
- Holder conditions: conditions on who may register a .sx name can apply, so check whether you meet them before you pay.
- Contact data: holder details must be accurate, and the registry may ask for them to be confirmed.
- Characters: names use letters, digits and hyphens, within the limits the registry publishes.
- Renewal: write the expiry date into a shared calendar and turn on automatic renewal where it is offered.
Who uses .sx
- Hotels, villa rental agencies and restaurants that welcome guests to the island.
- Marinas, yacht charters and boat services that work with sailors.
- Shops, real estate offices and professional firms that serve residents and visitors.
- Community groups, schools and event organisers with a local audience.
Strengths
- The ending points clearly to the island, which helps a local business stand out in a busy visitor market.
- Search engines may use the country-code ending as one signal, which can help when visitors search for services on the island.
- The zone is short and easy to print on a boat name, a sign or a brochure.
Things to keep in mind
- The zone is tied to one island, so a business with customers across the wider region may also need a generic address.
- Dutch is the official language while English is used in everyday life, so decide which languages your site should use.
- Visitors from elsewhere may not recognise the ending, so write the full address on every map, card and menu.
- Terms for holders can change, so keep your details current.
Checklist for island businesses
- Check the same name in .com and in the booking platforms that send guests to you.
- Use the official company name in the holder details, matching your trade papers.
- Publish opening hours, booking terms and a contact address on the site from the start.
- Set up mail records before you send reservations or invoices from the domain.
- Keep the registrar account protected and record who is able to approve the renewal.
Frequently asked questions
Can a business from outside the island register a .sx name? Holder conditions can apply, so read the registry's current rules before you order.
Does .sx help a site appear in local search results? It can be a useful local signal, but accurate listings, reviews and clear pages carry more weight.
Can I use .sx for a site in English? Yes. The ending does not set the language, and English is widely used on the island, so it suits many visitors.
