Frontenac, Missouri

Nearest ZIP codes to Frontenac

These are the ZIP codes nearest to Frontenac, each listed with the post office it is named after.

Area codes for Frontenac

• Area code 314

  In service since 1947. Shares its area with 557. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

• Area code 557

  In service since August 12, 2022. Shares its area with 314. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

Area codes here are matched from telephone rate centers, so a place near a boundary can have local numbers from either side of it.

Time zone

Frontenac is in the Central Time zone.

Towns near Frontenac

• Crystal Lake Park1.5 km (0.9 mi)
• Westwood2 km (1.2 mi)
• Huntleigh2.1 km (1.3 mi)
• Ladue3 km (1.9 mi)
• Country Life Acres3.3 km (2.1 mi)
• Warson Woods3.5 km (2.2 mi)
• Creve Coeur4.1 km (2.5 mi)
• Des Peres4.2 km (2.6 mi)