Area code 664 serves Montserrat. Atlantic Time. In service since July 1996, split from 809.
Montserrat
Area code 664 · Atlantic Time
The country on this page rides every phone parse. Send any number and it comes back with validity and clean formats.
curl -s "https://api.parseapi.com/phone/6645550100" \ -H "X-Api-Key: $PARSEAPI_KEY"