557 Area Code
Missouri, USA
Local time now · Central Time
2:44 AM
Area code 557 is in Missouri, USA, serving St. Louis, Florissant, Oakville and University City. It uses Central Time — the time there now is 2:44 AM. 314 is an overlay for the same area, so local calls need 10-digit dialing. In service since 2022.
| Area code | 557 |
|---|---|
| Location | Missouri, USA |
| Major cities | St. Louis, Florissant, Oakville, University City, Kirkwood, Mehlville, Maryland Heights, Hazelwood |
| Time zone | Central Time |
| Overlay codes | 314 |
| In service since | 2022 |
| Dialing | 1+10 digit permissible at service provider discretion |
Other area codes in Missouri
Time zone converterAll area codes
Frequently asked questions
Where is area code 557?
Missouri, USA — including St. Louis, Florissant, Oakville, University City and Kirkwood.
What time zone is area code 557?
Central Time.
How do I call a 557 number from abroad?
Dial your international access code, then 1 (the country code), then 557 and the 7-digit number — for example +1 557 555 0100. From the UK or India dial 00 1 557 …; from Bangladesh 00 1 557 … .
Is a call from 557 a scam?
Not by itself — 557 is an ordinary geographic area code in Missouri. Numbers can be spoofed, so be careful with unexpected calls asking for money or personal details.
Sources: North American Numbering Plan Administrator (NANPA) NPA database (10/25/2026); major cities from Wikidata (CC0). An area code shows where a number was first assigned — with number portability and mobile phones, the caller may be anywhere.