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area code

Biggest city:

St. Louis




Central (GMT -6)

Nearby area codes: 

Zip codes



Major Cities:

St. Louis area (proposed for future use).

St. Louis

Average Income:





Unemployment Rate:

The 557 area code is a planned area code for the state of Missouri, specifically designated to serve the St. Louis metropolitan area. Here are some key points about it: Future Overlay for the St. Louis Area: The 557 area code is intended as an overlay to the existing 314 area code, which currently serves the city of St. Louis and parts of its surrounding suburbs. The introduction of 557 is in response to the growing demand for new phone numbers in the region, driven by population growth and the proliferation of digital devices and services. Supporting a Growing Urban Population: The St. Louis region, which will be served by the 557 area code along with 314, is a significant urban and economic hub in Missouri. The area is known for its rich history, cultural institutions, and as a center for industries such as healthcare, education, and manufacturing. The new area code will support the high volume of communication necessary for the region's continued growth and development. Adapting to Technological and Demographic Changes: The implementation of the 557 area code as an overlay reflects the need to adapt to the evolving telecommunications landscape. It ensures a steady supply of phone numbers while avoiding the disruption of changing existing numbers. This strategic move is indicative of the region's ongoing development and its ability to evolve with changing communication needs. The introduction of the 557 area code represents the St. Louis area's growth and adaptability, ensuring the continuity and efficiency of telecommunication services for one of Missouri's most populous and dynamic regions.
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