What area code is 557?
Here's everything about it.
Instant lookup for the 557 area code — location, time zone, cities served, and who's been calling from it. No sign-up, no app.
557 at a glance
Summary
Cities & regions served by 557
St. Louis (overlay)5 communities on record for 557.
Where 557 sits on the map
Overlay of 314Coverage area
About the 557 region
557 covers St. Louis in Missouri, including Florissant, Crestwood, Hazelwood and Kirkwood. The code has been in service since 2022.
557 itself is an overlay: it shares its territory with 314 and was introduced when those codes ran low on new number combinations. New lines may receive either code, calls between them are local, and 10-digit dialing is required across the region.
Overlaid on 314.
Who called me from 557?
Community reports- Caller ID is trivially spoofed: an incoming call that displays 557 does not prove the caller is really in the 557 region or even in the United States.
- Avoid calling back unknown one-ring numbers — some premium-rate scams rely on curiosity callbacks.
- Never share verification codes, payment details, or remote access during an unsolicited call, even if the caller claims to be your bank or a government agency.
- When a 557 call pressures you to act immediately, hang up and contact the organization directly through its official number.
Be the first to add a community report for a 557 number below.
Frequently asked questions
FAQWhat area code is 557?+–
557 is a telephone area code serving St. Louis in Missouri, United States, in service since 2022.
Where is area code 557 located?+–
It covers Florissant, Crestwood, Hazelwood and Kirkwood in Missouri.
What cities are in area code 557?+–
Major communities on record include Florissant, Crestwood, Hazelwood and Kirkwood. The code's territory spans the St. Louis region of Missouri.
What time zone is 557?+–
557 observes Central (CT), which is UTC−6 / −5 DST and follows daylight saving time.
When did area code 557 start?+–
557 entered service in 2022. Its history: overlaid on 314.
Why does area code 557 exist?+–
557 is an overlay of 314: it covers the exact same territory and was introduced when the original code ran low on new number combinations. New lines may receive either code, calls between them are local, and 10-digit dialing applies.
Is 557 a scam area code?+–
Scam and robocall traffic can use any North American code, 557 included — caller ID is easy to spoof, so the code alone does not tell you who is really calling. Check the community reports on this page before calling back an unknown 557 number, and report anything suspicious.
Can I get a 557 phone number?+–
Yes — most mobile carriers and VoIP providers let you request a 557 number regardless of where you physically live, although in an overlaid region you may be assigned 314 instead.