557 area code
Area code 557 is in Missouri, including St. Louis, Florissant, Hazelwood and Bridgeton. It's on Central Time.
557 is an overlay area code: it was added on top of 314 and covers the same area, so new numbers there can get either code.
Central Time
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Business hours are taken as 9 AM to 5 PM on weekdays. US telemarketing rules only allow sales calls between 8 AM and 9 PM local time.
Cities in area code 557
| City | Time zone |
|---|---|
| St. Louis, MO | Central Time |
| Florissant, MO | Central Time |
| Hazelwood, MO | Central Time |
| Bridgeton, MO | Central Time |
Other area codes in Missouri
More: look up another area code · time zone converter · US time zones map
Questions people ask
Where is area code 557?
Area code 557 is in Missouri, including St. Louis, Florissant, Hazelwood and Bridgeton.
What time zone is area code 557?
557 is on Central Time (UTC−6, UTC−5 in summer).
What time is it in area code 557 right now?
The live clock at the top of this page shows the current local time in area code 557.