I got a call from a nonexistant number?

the 1 in front of the number would lead me to assume that it is +1 which would be north america.. which would make the area code 503 which would be located in OR and overlay with the 971 area code... http://nanpa.com/nas/public/npa_query_step2.do;nanpaid=30TTP98L4HV2LC9Gny1fT37KmRyy7x2qtDCvJb59H8t7QSS6ctHy!-1211937238?method=displayNpa but the number is too long to be a number from the US - even if you assumed that the double 503 was an error and removed one of the 503's the number is still too long to be a north american number.. now if the 1 in front was automatically placed by your caller ID or phone company the number might actually start as +503, or 011 503 in which case that would be the country code for elsalvador http://www.howtocallabroad.com/el-salvador/ but again the number would be too long for elsalvador, BUT if you assume that one of the 503's is an error or incorrect, then the number would fit into elsalvador's dial plan, and the number would be +503 7103 6092 and since the number starts with a 7 that would indicate that it was a cellular phone, so calling it back would incur the higher mobile rates to that country...