Some American companies operating in the Caribbean have international 800 numbers, meaning, they work from some Caribbean countries (or any country with an area code pre-fix, not a country code). For example American Airlines' 800 number works in Canada and The Bahamas, while for most others you would have to dial the 888 in order to reach them (like in the DR), and be charged for them. Not sure if this is the same in the DR, but one would assume so.