Montserrat country code +1 664 — call Montserrat & get a number.
Everything you need to dial Montserrat correctly and understand its NANP numbering format. Plus how to set up a local presence on this small Caribbean territory — a British Overseas Territory best known for the volcanic eruption that buried its former capital, Plymouth — without a physical office there.
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Montserrat at a glance
The numbers and facts you need before you dial.
What is the country code for Montserrat?
Montserrat is a small British Overseas Territory in the Leeward Islands, between Antigua and Guadeloupe. Often called "the Emerald Isle of the Caribbean" for its green volcanic terrain and Irish settler heritage — it's one of the few places outside Ireland where Saint Patrick's Day is a public holiday.
What sets it apart isn't its size — it's what happened to its geography. A long-dormant volcano at the island's southern end reactivated in past decades, and the eruptions buried the capital city, Plymouth. That single event reshaped the population, the administrative map, and even where the phone exchanges sit today.
On the numbering side, Montserrat is part of the North American Numbering Plan (NANP) — dial it like a US or Canadian area code, even though it sits thousands of miles from North America and uses UK-style governance as an Overseas Territory.
Code +1 664 was assigned to Montserrat 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 Montserrat.
How to call Montserrat from anywhere
From the US or Canada, Montserrat behaves like any NANP long-distance call: dial 1 664 XXX XXXX — no exit code needed. From the UK: 00 1 664 XXX XXXX. From anywhere else: your international exit code + 1 + 664 + the 7-digit number.
Within Montserrat, local calls are dialed using just the 7-digit subscriber number; the 664 area code isn't required for on-island calls, though including it will still connect. Out of Montserrat, the international exit code is 011.
Full example: +1 664 664 XXX XXXX — drop the local leading 0 when calling from abroad.
Montserrat phone number format explained
Montserrat numbers follow the standard NANP structure: 3-digit area code (664) plus 7-digit subscriber number, in the form +1 664 NXX XXXX. The exchange prefix (the first three digits after 664) identifies the specific carrier or service block on the island.
Because Montserrat is so small, its pool of active exchange codes is limited compared to larger NANP members — a handful of prefixes cover the entire territory's landline and mobile numbering. This is normal for micro-territories inside the NANP and doesn't affect how a number is dialed from outside.
Landline
+1-664-XXX-XXXX (small pool of active exchange codes covering the whole island)
Mobile
+1-664-XXX-XXXX (Flow and Digicel mobile ranges)
Montserrat area codes — major cities
Drop the local leading 0 when calling from abroad.
| City | Region | Area code |
|---|---|---|
| Brades (de facto capital) | Saint Peter Parish | 664 |
| Little Bay (planned future capital) | Saint Peter Parish | 664 |
| Salem | Saint Peter Parish | 664 |
| Saint John's | Saint Peter Parish | 664 |
| Plymouth (de jure, exclusion zone) | Saint Anthony Parish | 664 |
Montserrat mobile network prefixes
The prefix after +1 664 tells you which network issued the SIM — though number portability means it no longer guarantees the operator.
Flow (Cable & Wireless / Liberty Latin America)
Digicel Montserrat
Montserrat time zone
Montserrat operates on Atlantic Standard Time (AST), UTC−4, year-round. The territory does not observe daylight saving time, so the offset from UTC stays fixed all year.
Montserrat is 1 hour ahead of US Eastern Time during Eastern Daylight Time (roughly spring through autumn), and matches Eastern Standard Time the rest of the year — always check current DST status in the country you're calling from.
It aligns closely with most of the Eastern Caribbean (Puerto Rico, the US Virgin Islands, and other AST territories). For scheduling calls with Montserrat, AST is a stable, DST-free reference point.
Emergency numbers in Montserrat
Free to call from any Montserrat phone, landline or mobile.
Common mistakes when calling Montserrat
Almost every failed international call is a formatting issue, not a network issue.
Forgetting the leading "1" when dialing from outside the NANP
Because +1 664 looks unfamiliar next to well-known US area codes, callers sometimes drop the "1" or add an extra digit, resulting in a failed connection.
Assuming Plymouth is a functioning city
Older references, maps, and even some official documents still list Plymouth as Montserrat's capital. In practice it has been uninhabited and largely inaccessible for years — Brades is where government offices and most administrative activity actually operate.
Confusing Montserrat's +1 664 with unrelated Caribbean area codes
With over two dozen Caribbean nations and territories sharing the NANP's +1 prefix, it's easy to mistype 664 for a similar-looking neighbor's code — always double-check against the specific number, not just the country name.
Overestimating the size of the local numbering pool
Montserrat uses standard 7-digit NANP-format numbers, but the active population and subscriber base are small — the exchange codes in active use reflect that.
Tips to reduce the cost of calling Montserrat
Don't waste effort on Plymouth-based addresses or exchanges
the southern part of the island, including Plymouth, is an official exclusion zone. Any modern Montserrat presence sits in the north, around Brades and Little Bay.
Route calls through VoIP or an MCM virtual number rather than paying carrier international rates into 664.
911 or 999 — either works
unlike most NANP territories, Montserrat honors both the North American and UK emergency numbers; use whichever is easier for your callers to remember.
Pair with other Eastern Caribbean numbers
if you're building regional Caribbean coverage, a 664 line pairs naturally with Saint Vincent, Grenada, Antigua and Saint Kitts numbers for a complete Leeward/Windward footprint.
Why businesses get a Montserrat virtual number
Let's be direct about this one: Montserrat is not a high-volume market. With a population in the low thousands, it will never be a significant standalone revenue opportunity, and no legitimate provider should tell you otherwise.
Where a Montserrat number does make sense is narrow but real — regional Caribbean coverage, disaster-recovery and reconstruction work tied to ongoing volcanic monitoring, diaspora-facing communication back to the island, and the small tourism sector that benefits from a recognizable local number for booking inquiries.
Regional Caribbean coverage
businesses building out an Eastern Caribbean footprint (alongside Saint Vincent, Grenada, Antigua or Saint Kitts) can add Montserrat to present a complete regional presence, even if call volume is modest.
NGOs, government contractors, and reconstruction-related work
given Montserrat's ongoing volcanic monitoring and infrastructure redevelopment as a UK Overseas Territory, organizations doing disaster-recovery, geological research, or UK-government-adjacent work may need a genuinely local point of contact.
Diaspora connectivity
with a large share of Montserratians having relocated to the UK and elsewhere after the volcanic crisis, a local number helps diaspora-facing organizations, remittance services, or family-oriented businesses maintain an easy, local-rate line back to the island.
Tourism and hospitality
Montserrat's tourism sector, while small, benefits from a recognizable local number for booking inquiries rather than requiring visitors to dial an international line.
Low-cost regional test bed
a virtual 664 number is inexpensive to trial for a specific use case — no local hire, no lease, no hardware — and removes real friction for the callers who do dial it.
Real PSTN presence
a true 664 number on the network, not a forwarding workaround.
Montserrat virtual numbers with My Country Mobile
Setting up a physical presence on a Caribbean island of a few thousand people isn't realistic for most businesses — and it doesn't need to be. MCM provisions a Montserrat +1 664 virtual number in minutes, routing calls to any phone, softphone or contact-center stack you already use, and lets you manage it alongside numbers from 190+ other countries from one dashboard.
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 Montserrat virtual number
Most businesses are live within hours, not days.
Choose your Montserrat number — select a +1 664 virtual number through the MCM dashboard.
Verify any local requirements — standard KYC applies; requirements are generally light for this number type.
Connect your routing — point the number to your existing phone system, mobile device, VoIP softphone, or contact center platform.
Go live — start receiving calls immediately, with usage, call logs and billing visible from the same dashboard.
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Montserrat +1 664 — FAQ
What is Montserrat's country code?expand_more
Montserrat's country code is +1 664. It's part of the North American Numbering Plan (NANP), so it uses a "+1" prefix like the US and Canada, followed by the unique 664 area code.
How do I call a Montserrat number from the US?expand_more
Dial 1, then 664, then the 7-digit local number — the same way you'd dial any other NANP long-distance number.
Is Montserrat's capital Plymouth or Brades?expand_more
Technically, Plymouth is still the de jure (legal) capital, but it has been uninhabited for years due to volcanic damage and is not accessible for normal use. Brades functions as the de facto seat of government today, and a future permanent capital is planned for Little Bay.
Why was Montserrat's capital abandoned?expand_more
A previously dormant volcano at the island's southern end, Soufrière Hills, reactivated in past decades and produced eruptions that buried much of Plymouth in ash and volcanic material, rendering it permanently uninhabitable. It's one of the most well-documented cases of a capital city being lost to a natural disaster.
Can I still visit the southern part of Montserrat?expand_more
The southern portion of the island, including the area around Plymouth, remains an official exclusion zone with access restrictions due to ongoing volcanic monitoring. Rules and boundaries can change, so always check current guidance from local authorities before planning any visit.
What currency does Montserrat use?expand_more
The Eastern Caribbean Dollar (XCD), shared with several other Eastern Caribbean nations and territories.
What time zone is Montserrat in?expand_more
Atlantic Standard Time (AST), UTC−4, with no daylight saving time adjustments during the year.
How big is Montserrat's population?expand_more
Approximately 4,400 people as of the most recent census — a fraction of its pre-volcanic-crisis population, which was around 12,000.
What's the emergency number in Montserrat?expand_more
Both 911 and 999 are used for police, fire, and ambulance services — reflecting the territory's dual identity as a NANP member and a British Overseas Territory.
Can businesses get a virtual Montserrat number without an office there?expand_more
Yes. Providers like MCM issue Montserrat +1 664 virtual numbers that route to any phone or system you already use, without requiring a physical presence on the island.