Florissant, Missouri Area Code

Florissant, MO is officially utilizing an area code overlay in which area codes 314, and 557 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.

In addition to Florissant, MO area code information read more about area codes 314, 557 and Missouri area codes.

Florissant, MO is located in Saint Louis County and observes the Central Time Zone.
View our Times by Area Code tool.