The 557 area code serves St. Louis and most of its inner-ring suburbs in St. Louis County, Missouri. Look up any phone number starting with 557 area code.
Federal Data
State Data
County Data
City Data
Area Code 557 phone numbers reported as unwanted calls to the FTC in the last 30 days.
(557) 210-8558
3 reports ·
(557) 200-3164
1 report ·
(557) 200-7157
1 report ·
(557) 210-8391
1 report ·
(557) 240-0322
1 report ·
(557) 240-8844
1 report ·
(557) 221-6421
1 report ·
(557) 202-4190
1 report ·
(557) 379-2338
1 report ·
(557) 210-8090
1 report ·
No, 557 is a real St. Louis, Missouri area code that overlays with 314, serving Florissant, Oakville, and surrounding communities. Fraudsters spoof it to make out-of-state calls appear local to Missouri residents.
A St. Louis number on your caller ID lowers your guard, and that familiarity is the core spoofing motivation here. Fake process server threats and bogus subscription renewal scams impersonating tech companies are among the most active fraud patterns reported from this prefix.
Phone numbers with the 557 area code originate from the core of the St. Louis area, including the city of St. Louis and its inner-ring suburbs.
Area code 557 is an overlay to area code 314 . Area code 314 was established in 1947. Area code 557 was added on August 12, 2022. Ten-digit dialing is required.
Area code 557 is a general purpose code which was placed in service on August 12, 2022.
| Rate Center | Number of Prefixes |
|---|
Browse Missouri area codes for phone number lookup: