Area codes › Sint Maarten › 721

Area code 721 - All of Sint Maarten

Area code 721 is a country-wide North American Numbering Plan code serving all of Sint Maarten; its largest city is Philipsburg. It serves a population of roughly 43,923 (World Bank, 2025). It was activated in 2011 .

Sources: FCC OpenData, Wikipedia, and community-submitted reports · Updated
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Local time in 721 ?
-
Time zone ?
America/Lower_Princes
Activated ?
2011

Who called me from area code 721?

A call from area code 721 can come from anywhere in Sint Maarten - it is a country-wide code, with Philipsburg its largest city - but caller ID spoofing means the area code alone cannot confirm who called. The only reliable way to identify the caller is to check the full 10-digit number:

  1. Run the number through the reverse phone lookup at the top of this page to see the owner's name, carrier, and location.
  2. Compare it against the recently reported scam numbers in 721 below.
  3. If the call was unwanted, report it to the FTC and use the report form on this page so other 721 residents see it.
Report a scam call from 721 Help other 721-area residents - takes 20 seconds, no signup

Reports are reviewed by our team before appearing on the page. The highest-reported numbers get added to the “Recently reported scam numbers” list above with a “community” badge.

Only the number, category, and description are stored. IP addresses are one-way hashed for rate-limiting and never stored raw. Reports are moderated before publication. Links are not allowed in descriptions.

Should I answer a call from a 721 number? Take the 30-second quiz - 5 questions, verdict + advice

Runs entirely in your browser - nothing is sent or stored.

1. Were you expecting a call today?
2. Do you recognise the specific number (not just the area code)?
3. Have you searched the number online yet?
4. Is it during normal business hours in 721?
5. Are you actively waiting on a business decision (delivery, loan, job, etc.)?

Where is the 721 area code? Coverage map

The pin marks Philipsburg, the largest city in Sint Maarten. Zoom and pan to explore the coverage region.

Interactive map. Click a pin for city details. Data © OpenStreetMap contributors.

Why do scammers use 721 numbers?

Area code 721 belongs to Sint Maarten, but it looks like a normal North American number because Sint Maarten shares the +1 country code with the US and Canada. Scammers exploit exactly that confusion. The classic pattern is the one-ring callback scam: your phone rings once from a 721 number, and calling back connects you to a premium international line that bills by the minute. Caribbean area codes including 809, 876 and 473 are so associated with this scheme that US consumer agencies have warned about it for years.

  • Missed a call from 721? Do not call back unless you know someone in Sint Maarten. Run the number through the lookup on this page first.
  • Calling 721 costs international rates. It is not a US or Canadian domestic call, even though it looks like one - check your carrier's rates before dialing.
  • Report it: US residents can report unwanted 721 calls to the FTC; Canadians to the Canadian Anti-Fraud Centre.

Legitimate calls from Sint Maarten exist too - businesses, hotels, family. The lookup form above is the fastest way to tell the difference.

Recently reported scam numbers in 721

No reports for 721 yet. Be the first - use the “Report a scam call” form below to flag a number you've received. Approved reports appear here alongside FCC-recorded complaints.

How to block 721 spam calls (by carrier)

Getting repeated spam calls from 721 numbers around Philipsburg, Sint Maarten? You can't legitimately block every 721 call without also missing legitimate ones from Philipsburg, Sint Maarten - so the practical fix is to turn on your carrier's free spam filter and register on the national do-not-call list. Step-by-step for each major US carrier below.

AT&T

  1. Download the free AT&T ActiveArmor app (iOS + Android).
  2. Sign in with your wireless number.
  3. Enable Fraud Blocking and Suspected Spam Warning.
  4. To block a specific number, tap the call in your history → Block.

Verizon

  1. Download the free Verizon Call Filter app (iOS + Android).
  2. Sign in with your Verizon account.
  3. Turn on Spam Filter.
  4. To block a specific number: My Verizon → Blocks → Add Number.

T-Mobile

  1. Download the free Scam Shield app (iOS + Android).
  2. Enable Scam Block (blocks known scam calls silently).
  3. Use Scam ID to see “Scam Likely” caller ID on suspicious numbers.
  4. To block a specific number, dial #662# from your device.

All carriers

  1. Register on the FTC's National Do-Not-Call list.
  2. Report unwanted calls to the FCC at fcc.gov/complaints.
  3. On iPhone: Settings → Phone → Silence Unknown Callers.
  4. On Android: Phone app → ⋮ → Settings → Caller ID & spam.

Sources: carrier support pages (AT&T, Verizon, T-Mobile), FCC consumer guides. Free features as of 2026. Every one of these steps costs nothing.

History of the 721 area code

Area code 721 is the telephone area code in the North American Numbering Plan (NANP) for Sint Maarten, a constituent country of the Kingdom of the Netherlands in the Caribbean. The area code was assigned in 2011 after membership of the country in the NANP became effective. International dialing to the country requires the use of country code 1.

721 area code FAQ: common questions

What area code is 721?

Area code 721 is a North American Numbering Plan area code that serves NANP area code for the country of St. Maarten (Caribbean) in Sint Maarten, primarily including Philipsburg and surrounding communities. It was activated in 2011.

Where does area code 721 cover?

Area code 721 covers the Philipsburg, Sint Maarten area.

Is 721 a real area code or a scam?

721 is a real, actively-assigned US area code - not itself a scam. However, spammers do use 721 numbers because the code is well-known and appears local to millions of residents. Always verify the specific number, not the area code.

How do I block 721 spam calls?

You cannot legitimately block an entire area code without also blocking legitimate calls from Philipsburg. Better options: register on the National Do-Not-Call list, enable your carrier's spam-filter (all major US carriers now offer this free), and report unwanted calls to the FCC at fcc.gov/complaints so they show up in the trend data on this page.

What's the overlay area code for 721?

721 does not currently have an overlay area code assigned. New numbers in the region are still issued with the 721 prefix.

Sources

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