Area Code Lookup
What Area Code Is St Louis?
2 area codes serve St Louis · Missouri
St Louis is served by area codes 314, 557. It is located in Missouri.
Area Codes Serving St Louis
Frequently Asked Questions
What area code is St Louis?
St Louis is served by area codes 314, 557. It is located in Missouri.
Why does St Louis have multiple area codes?
As demand for phone numbers increased, NANPA added area codes through splits (dividing the region) or overlays (layering a new code over the same geography). St Louis now has 2 area codes — 314 and 557 — covering the same or overlapping areas.
How do I call St Louis from outside the US?
To call St Louis from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-314-XXX-XXXX). The +1 is the country code for all NANPA countries.