Country Code: +503 International Call Prefix: 00 National Significant Numbers (NSN): seven or eight digits.
Format: +503 NXYZ MCDU where 'N' is the National Destination Code (NDC), and 'X', 'Y', 'Z', 'M', 'C', 'D', and 'U' stand for millions, hundred thousands, ten thousands, thousands, hundreds, tens, and units, respectively.
New number plan took effect in 2005.
The numbering plan for the Republic of El Salvador uses the following numbering structure: Notes