The area code (939) for Puerto Rico, operates as an overlay for the original local (787) telephone area code. The area code (787) is the local telephone area code of Puerto Rico. ...
As an overlay, the area code was added on or around the date September, 2001. The (939) area code was created following (787)'s split from the legacy regional (809) area code. A telephone numbering plan is a system that allows subscribers to make and receive telephone calls across long distances. ... September is the ninth month of the year in the Gregorian Calendar and one of four Gregorian months with 30 days. ... 2001: A Space Odyssey. ...
When in Puerto Rico, the full area code + seven digit phone number must be dialed. When calling to Puerto Rico from anywhere in the United States or Canada dial, 1(939) + seven digit phone number.
The Ottawa area has local dialing capability with the Gatineau region in areacode 819.
It is expected that by 2012, a second areacode will be added in the region as the areacode exhausts; it will most likely be in the form of an areacode overlay, but it has not been determined.