Area Code 419-558 located in ADA, HARDIN, OH, more detail is as below. Place NPA (Numbering Plan Area) : 419 NXX (Local Number Prefix) : 558 City : ADA County : HARDIN State : OH (Ohio) NXX Use Type : Landline NXX Intro Version : 2001-10-31 FIPS (Federal Information Processing Standards) : 39065 LATA (Local Access Transport Area) : 923 Rate Center : ADA ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 45810 Other Information NPANXX : 419558 County Population : 0 Switch CLLI (Common Language Location Identifier) : YNTWOHHD7MD Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : LEVEL 3 COMMUNICATIONS, LLC - OH OCN (Operating Company Number) : 4863 Coverage Area Name : ADA Latitude : 40.7671 Longitude : -83.8209 ‹ previous : 419-557 next › : 419-559 Telephone Number List 419-558-0000 ~ 419-558-9999