Area Code 318-550 located in SHREVEPORT, CADDO, LA, more detail is as below. Place NPA (Numbering Plan Area) : 318 NXX (Local Number Prefix) : 550 City : SHREVEPORT County : CADDO State : LA (Louisiana) NXX Use Type : Landline NXX Intro Version : 2001-10-31 FIPS (Federal Information Processing Standards) : 22017 LATA (Local Access Transport Area) : 486 Rate Center : SHREVEPORT ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 71103 Other Information NPANXX : 318550 County Population : 0 Switch CLLI (Common Language Location Identifier) : SHPTLAMADS3 MSA CBSA (Core Based Statistical Area) : Shreveport-Bossier City, LA MSA CBSA Code (Core Based Statistical Area) : 43340 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : NETWORK TELEPHONE CORPORATION - LA OCN (Operating Company Number) : 3807 Coverage Area Name : SHREVEPORT Latitude : 32.5070 Longitude : -93.7541 ‹ previous : 318-550 next › : 318-551 Telephone Number List 318-550-0000 ~ 318-550-9999