Area Code Atlas

NPA 939 overlay on 787 announced

NPA 939 To Overlay NPA 787 (Puerto Rico)

Relief planned for NPA 787 with overlay 939

Planning for relief of number exhaustion in area code 787 began with the announcement of an overlay area code 939 on July 26, 2000. This was in response to rapid growth in demand for telephone numbers in Puerto Rico.

Supplemental Information NPA Overlay 787/939 (Puerto Rico)

NPA 939 overlaid on 787 in Puerto Rico

Area code 939 was overlaid on the existing 787 area code in Puerto Rico on September 15, 2001. This overlay was implemented due to rapid number exhaustion and mandated ten-digit dialing for all calls within the territory.

Mandatory ten-digit dialing in 787/939 overlay complex

Mandatory ten-digit dialing was implemented on September 15, 2001, for the overlay complex of area codes 787 and 939 in Puerto Rico, requiring callers to dial the area code for all local calls.