423
- 42301 Owensboro
- 42303 Owensboro
- 42320 Beaver Dam
- 42321 Beech Creek
- 42322
- 42323 Beechmont
- 42324 Belton
- 42325 Bremen
- 42326 Browder
- 42327 Calhoun
- 42328 Centertown
- 42330 Central City
- 42332 Cleaton
- 42333 Cromwell
- 42337 Drakesboro
- 42338 Dundee
- 42339 Dunmor
- 42343 Fordsville
- 42344 Graham
- 42345 Greenville
- 42347 Hartford
- 42348 Hawesville
- 42349 Horse Branch
- 42350 Island
- 42351 Lewisport
- 42352 Livermore
- 42354 Mc Henry
- 42355 Maceo
- 42356
- 42361 Olaton
- 42366 Philpot
- 42367 Powderly
- 42368 Reynolds Station
- 42369 Rockport
- 42370 Rosine
- 42371 Rumsey
- 42372 Sacramento
- 42374 South Carrollton
- 42376 Utica
- 42378 Whitesville