Area Code 504-221 located in GRETNA, JEFFERSON, LA, more detail is as below. Place NPA (Numbering Plan Area) : 504 NXX (Local Number Prefix) : 221 City : GRETNA County : JEFFERSON State : LA (Louisiana) NXX Use Type : Wireless NXX Intro Version : 1998-01-25 FIPS (Federal Information Processing Standards) : 22051 LATA (Local Access Transport Area) : 490 Rate Center : NEWORLEANS ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 70053 Other Information NPANXX : 504221 Switch CLLI (Common Language Location Identifier) : NWORLAMADS0 MSA CBSA (Core Based Statistical Area) : New Orleans-Metairie-Kenner, LA MSA CBSA Code (Core Based Statistical Area) : 35380 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : SPRINT SPECTRUM L.P. OCN (Operating Company Number) : 6664 Coverage Area Name : KENNER Latitude : 29.9729 Longitude : -90.2440 ‹ previous : 504-220 next › : 504-222 Telephone Number List 504-221-0000 ~ 504-221-9999