Montserrat is +1 664

A local writes 664 555 0123 — the dialer below turns that into what you press.

Country code
+1
Dialing out
011
Trunk prefix
none
Area codes
664

Montserrat is a full North American Numbering Plan member, split out of the Caribbean-wide 809 in 1996 with area code 664, whose digits spell MNI on a keypad. From the US or Canada it is just 1 664 and the number, no country code gymnastics, while islanders dial 011 to leave the NANP world.

NANP format: area code 664 plus a seven-digit local number; local calls need only the seven digits.

You dial

1 6645550123

Both countries share the North American plan — no exit code, just 1 and the ten digits. From any mobile, +1 6645550123 works worldwide.

Type the number the way a local writes it — the arithmetic is derived from each country's ITU plan.

Plan facts verified against ITU-T E.164 assigned country codes · Area code 664 — Wikipedia. Prose is our own.

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