Telephone numbers in El Salvador
Country Code: +503
International Call Prefix: 00
National Significant Numbers : seven or eight digits.
Format: +503 NXYZ MCDU where 'N' is the National Destination Code, and 'X', 'Y', 'Z', 'M', 'C', 'D', and 'U' stand for millions, hundred thousands, ten thousands, thousands, hundreds, tens, and units, respectively.
Number plan
New number plan took effect in 2005.The numbering plan for the Republic of El Salvador uses the following numbering structure:
| Digit X | Use within the structure XYZ–MCDU |
| 0 | Not used in this structure – reserved for future use. |
| 1 | For future use in the Metropolitan area. |
| 2 and 5 | Used for identifying the fixed telephony service in any locality within the Metropolitan area known as “San Salvador”. |
| 3 | Used for identifying the fixed telephony service in any locality within the Central area. |
| 4 | Used for identifying the fixed telephony service in any locality within the Western area. |
| 6 | Used for identifying the fixed telephony service in any locality within the Eastern area. |
| 7 | For future use in the Eastern area. |
| 8 | For future use in the Western area. |
| 9 | For future use in the Central area. |
Notes