Geographic regions and area codes

Area code 904 covers:

  • Jacksonville
  • St. Augustine
  • St. Johns
  • Fernandina Beach
  • Orange Park
  • Middleburg

The 2024 overlay, area code 324, introduced mandatory ten-digit dialing while expanding number availability. New numbers began receiving 324 area codes starting February 26, 2024, while existing 904 numbers remained unchanged.