The phone code 1787 at the beginning of the phone number +1787 (subscriber’s phone) means that you are being called from Puerto Rico or you are calling a subscriber registered in Puerto Rico.
+1787 — Puerto Rico
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Telephone Code +1787 — what country it is
The international phone code +1787 officially belongs to Puerto Rico, so all phone numbers that start with these numbers refer to this country.
It means that you must enter “1787″ after the “+” sign to call to Puerto Rico. Then the next digits of the phone number can be entered.
Whose country code is +1787?
+1787 is the beginning of a phone number which can belong to any subscriber who purchased a SIM card in Puerto Rico. It does not mean that a subscriber is definitely there at the time of the call (since he or she can make a call in roaming), but there is such a possibility.