Area Code 573-603 located in HANNIBAL, MARION, MO, more detail is as below. Place NPA (Numbering Plan Area) : 573 NXX (Local Number Prefix) : 603 City : HANNIBAL County : MARION State : MO (Missouri) NXX Use Type : Landline NXX Intro Version : 1/23/2013 FIPS (Federal Information Processing Standards) : 29127 LATA (Local Access Transport Area) : 520 Rate Center : HANNIBAL ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 63401 Other Information NPANXX : 573603 County Population : 0 MSA CBSA (Core Based Statistical Area) : Hannibal, MO MSA CBSA Code (Core Based Statistical Area) : 25300 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : CHARTER FIBERLINK, LLC - MO OCN (Operating Company Number) : 5607 Coverage Area Name : HANNIBAL Latitude : 39.7144 Longitude : -91.3666 ‹ previous : 573-599 next › : 573-604 Telephone Number List 573-603-0000 ~ 573-603-9999