Area code 557
Area code 557 serves St. Louis and nearby parts of Missouri, including Florissant, Chesterfield and Wildwood. It is on Central Time, which observes daylight saving time. 314 is an overlay for the same area.
Area code 557 at a glance
| State | Missouri (MO) |
| Main city | St. Louis |
| Time zone | Central Time |
| UTC offset | UTC−6 in winter, UTC−5 in summer |
| Daylight saving time | Yes |
| Overlay codes | 314 |
Cities in 557
- St. Louis
- Florissant
- Chesterfield
- Wildwood
An area code shows where a number was first assigned. Mobile numbers keep their area code when people move, so the person you’re calling may be somewhere else.
When you can call a 557 number
Federal telemarketing rules under the TCPA allow sales calls between 8 AM and 9 PM in the called person’s local time. Here is that window for a 557 number, shown in your own time zone.
General information, not legal advice. Some states add rules for Sundays, holidays or the number of calls. See our calling hours guide.
| If you’re on | You can call 557 between |
|---|---|
| Eastern | 9:00 AM to 10:00 PM |
| Central | 8:00 AM to 9:00 PM |
| Mountain | 7:00 AM to 8:00 PM |
| Arizona | 6:00 AM to 7:00 PM |
| Pacific | 6:00 AM to 7:00 PM |
See the time in 557 without leaving your CRM
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Other area codes in Missouri
Questions about 557
What time zone is area code 557?
Area code 557 is on Central Time. It observes daylight saving time.
Where is area code 557?
Area code 557 is in Missouri. Its main city is St. Louis, and it also covers Florissant, Chesterfield and Wildwood.
What are the legal hours to call a 557 number?
Under the federal TCPA, sales calls are allowed from 8 AM to 9 PM in the called person’s local time. Personal and informational calls are not limited by these hours.
What area codes overlay 557?
314 covers the same area as 557, so numbers in the same town can have either code.