Area Code 557: St. Louis Overlay

Area code 557 is in St. Louis Overlay, Missouri. Numbers that start with 557 are based in St. Louis, Hazelwood, Ferguson.

Area code 557 covers St. Louis Overlay in Missouri. The primary cities served include St. Louis, Hazelwood, Ferguson.

Area code 557 is primarily associated with St. Louis, along with Hazelwood, Ferguson. It serves the broader St. Louis Overlay area.

Area code 557 is in Missouri (MO). Missouri has 8 area codes in total.

Area code 557 operates in the Central Time Zone. Keep this in mind when scheduling calls with contacts in the St. Louis Overlay area.

Yes, area code 557 is an overlay of area code 314. Both codes serve the same geographic area, St. Louis Overlay, and were introduced to meet growing demand for phone numbers. Because 557 is an overlay, 10-digit dialing is required for all local calls within the region.

Yes. Because 557 is an overlay sharing its territory with area code 314, 10-digit dialing, the full area code plus the 7-digit number, is required for all local calls within St. Louis Overlay.

No, area code 557 is a local geographic area code, not a toll-free number. Standard call charges apply based on your carrier plan. Toll-free area codes include 800, 833, 844, 855, 866, 877, and 888.

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