Area Code 256-320 located in SHEFFIELD, COLBERT, AL, more detail is as below. Place NPA (Numbering Plan Area) : 256 NXX (Local Number Prefix) : 320 City : SHEFFIELD County : COLBERT State : AL (Alabama) NXX Use Type : Wireless NXX Intro Version : 2001-06-30 FIPS (Federal Information Processing Standards) : 01033 LATA (Local Access Transport Area) : 477 Rate Center : SHEFFIELD ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 35660 Other Information NPANXX : 256320 County Population : 0 Switch CLLI (Common Language Location Identifier) : HNVIAL030MD MSA CBSA (Core Based Statistical Area) : Florence-Muscle Shoals, AL MSA CBSA Code (Core Based Statistical Area) : 22520 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : SPRINT SPECTRUM L.P. OCN (Operating Company Number) : 6664 Coverage Area Name : SHEFFIELD Latitude : 34.7654 Longitude : -87.6991 ‹ previous : 256-319 next › : 256-321 Telephone Number List 256-320-0000 ~ 256-320-9999