Area codes › Caribbean & Atlantic
🇲🇸 664 area code
Area code 664 belongs to Montserrat. It is dialed like any US or Canadian number — 1 plus ten digits — but a call to it is an international call, billed at international rates. Enter a 664 number below for a free check before you call back.
- Location: Montserrat
- Time zone: Atlantic (UTC−4)
- In service since July 1, 1996
Look up a number
Validity, carrier, line type, and region on the first pass.
Area code 664 at a glance
- Area code
- 664
- Location
- Montserrat
- Time zone
- Atlantic (UTC−4)
- Local time now
- —
- In service since
- July 1, 1996
- Created from
- 809
- Local calls
- Dial 7 digits
- Number format
- (664) 555-0123
- From abroad
- +1 664 555 0123
664 and the one-ring scam
Because 664 looks like a US area code, it is a favourite of "one-ring" (wangiri) scams: the phone rings once, you call back, and the call is billed as international — sometimes with premium per-minute charges that go to the scammer.
If you do not know anyone in Montserrat, do not call back a missed 664 call. Look the number up first, and ask your carrier to block outgoing international calls if you never make them.
About area code 664
664 entered service on July 1, 1996, when it was split from 809.
FAQ
Area code 664 questions
Sources: NANPA NPA database (11/04/2026) and Google libphonenumber. Area codes show where a number was assigned, not where its owner is today.
Where is area code 664?
Area code 664 is in Montserrat.
What time zone is area code 664?
664 is in the Atlantic (UTC−4) time zone, and does not observe daylight saving time.
When did area code 664 start?
664 entered service on July 1, 1996, created from 809.
Is calling area code 664 international?
Yes. 664 is Montserrat, so calls from the US or Canada are billed as international even though you dial 1 + ten digits. Check your carrier's rates before calling back.
How do I find out who called me from 664?
Enter the full number in the lookup at the top of this page. The free check confirms whether the number is valid and shows its carrier, line type and region; a full report adds owner and public-web records where they are available.
Got a call from 664?
Run the free check first — validity, carrier, line type and region — and unlock the full report only if you need it.