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557 Area Code 🌍☎️

Area Code Profile · Missouri

The 557 area code is located in the state of Missouri and covers 91 cities, serving a total population of approximately 1,052,285. Major cities covered by the 557 area code include St. Louis, Florissant, Chesterfield, Oakville, University City (which represents the most populated areas). There are a total of 39 telephone prefix exchanges in this area code, which support an estimated 390,000 active or assignable phone numbers. These prefix lines are operated by 12 distinct carriers, with St. Louis as the primary rate center location.

Central Time91 Cities39 Prefixes

Reverse Phone Lookup in St. Louis, Missouri

Unmask unknown callers, verify telemarketing reports, and view detailed owner information for any phone number beginning with area code (557).

How it works

1

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Provide any 10-digit phone number starting with the (557) area code.

2

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Our system scans public registries, carrier mappings, and spam reports.

3

Reveal Report

Access location details, line type, carrier, owner information, and safety levels.

Neighborhood Demographics

Calculated demographics and census summary estimations for area code 557.

34.4 y/oMedian Age
$45,900Median Income
$584,000Median Home Value
1,052,285Total Population

Telemarketer Complaints

Most recent complaints and comments for phone numbers beginning with 557.

Did you receive an unwanted call from a (557) phone number?

Help the community identify spammers by filing a comment.

(557) 731-8636May 19, 2026Scam / Fraud
Received a text and follow-up call saying my bank account was locked due to suspicious transactions. Included a link to a fake login portal. Do not click!
See Details
(557) 744-8653May 18, 2026Robocall
Robocall regarding health insurance plans. Said my current coverage was expiring and offered a "free consultation". Calling multiple times a day from slightly different numbers.
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(557) 757-8670May 17, 2026Scam / Fraud
Robocall claiming to be from the IRS. Stated that my Social Security Number has been flagged and suspended. Asked to press 1 to speak with an agent. Obvious phishing scam.
See Details
(557) 770-8687May 16, 2026Robocall
Received a silent call. When I answered, there was just dead air for 5 seconds before it automatically disconnected. Likely an automated system testing for active numbers.
See Details
(557) 783-8704May 20, 2026Telemarketer
Offered an unsolicited quote for local roofing and home energy services. They knew my area code but when I asked how they got my number, they hung up immediately.
See Details

Cities in the 557 Area Code

The most populous cities in area code 557 are: St. Louis (319,294), Florissant (52,158), Chesterfield (47,484), Oakville (36,143), and University City (35,371).

Other cities in the 557 area code include:

Mehlville, Kirkwood, Maryland Heights, Hazelwood, Webster Groves, Ferguson, Affton, Spanish Lake, Old Jamestown, Creve Coeur, Lemay, Concord, Overland, Clayton, Jennings, St. Ann, Crestwood, Bridgeton, Bellefontaine Neighbors, Town and Country, Berkeley, Richmond Heights, Ladue, Sunset Hills, Des Peres.

CityPopulation% in Area Code
St. Louis319,294100%
Florissant52,158100%
Chesterfield47,48421%
Oakville36,14399%
University City35,371100%
Mehlville28,380100%
Kirkwood27,54099%
Maryland Heights27,472100%
Hazelwood25,703100%
Webster Groves22,995100%
Ferguson21,203100%
Affton20,307100%
Spanish Lake19,650100%
Old Jamestown19,184100%
Creve Coeur17,833100%
Lemay16,645100%
Concord16,421100%
Overland16,062100%
Clayton15,939100%
Jennings14,712100%

Showing top 20 of 91 cities.

What Time Zone is Area Code 557?

Central Time Zone

Abbreviation: CT · UTC Offset: UTC-6

The 557 area code lies within the Central Time Zone (CT, UTC-6).

Nearby Area Codes

235Columbia, Missouri314St. Louis, Missouri417Springfield, Missouri573Columbia, Missouri636O'Fallon, Missouri660Sedalia, Missouri816Kansas City, Missouri975Kansas City, Missouri

Phone Prefixes in the 557 Area Code

39 prefixes found · 12 carriers · 7 rate centers

PrefixCarrierRate Center
(557) 200ONVOY, LLC - MOLADUE
(557) 201TELEPORT COMMUNICATIONS AMERICA, LLC - MOKIRKWOOD
(557) 202COMCAST IP PHONE, LLCST LOUIS
(557) 203METROPCS, INC.MEHLVILLE
(557) 204FIVE9, INC.ST LOUIS
(557) 205TELEPORT COMMUNICATIONS AMERICA, LLC - MOST LOUIS
(557) 206TELEPORT COMMUNICATIONS AMERICA, LLC - MOST LOUIS
(557) 207FIVE9, INC.OAKVILLE
(557) 208ONVOY, LLC - MOLADUE
(557) 209ONVOY, LLC - MOKIRKWOOD
(557) 210CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MOLADUE
(557) 212METROPCS, INC.MEHLVILLE
(557) 213METROPCS, INC.ST LOUIS
(557) 214NEW CINGULAR WIRELESS PCS, LLC - ILST LOUIS
(557) 215CALLWORKS CORPORATIONST LOUIS
(557) 216TELEPORT COMMUNICATIONS AMERICA, LLC - MOST LOUIS
(557) 217NEW CINGULAR WIRELESS PCS, LLC - ILSAPPINGTON
(557) 218NEW CINGULAR WIRELESS PCS, LLC - ILLADUE
(557) 219CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MOLADUE
(557) 220NEW CINGULAR WIRELESS PCS, LLC - ILCREVECOEUR
(557) 221ONVOY, LLC - MOMEHLVILLE
(557) 222LEAP TELECOM, LLCST LOUIS
(557) 223CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MOLADUE
(557) 224TELEPORT COMMUNICATIONS AMERICA, LLC - MOCREVECOEUR
(557) 225NEW CINGULAR WIRELESS PCS, LLC - ILLADUE
(557) 273TELEPORT COMMUNICATIONS AMERICA, LLC - MOST LOUIS
(557) 362TELEPORT COMMUNICATIONS AMERICA, LLC - MOST LOUIS
(557) 454TELEPORT COMMUNICATIONS AMERICA, LLC - MOST LOUIS
(557) 467ONVOY, LLC - MOST LOUIS
(557) 500ONVOY SPECTRUM, LLCST LOUIS
(557) 507ONVOY SPECTRUM, LLCST LOUIS
(557) 557ONVOY, LLC - MOST LOUIS
(557) 653TELEPORT COMMUNICATIONS AMERICA, LLC - MOST LOUIS
(557) 747TELEPORT COMMUNICATIONS AMERICA, LLC - MOST LOUIS
(557) 777TERRA NOVA TELECOM INC.CREVECOEUR
(557) 888TERRA NOVA TELECOM INC.KIRKWOOD
(557) 953TELEPORT COMMUNICATIONS AMERICA, LLC - MOST LOUIS
(557) 996TELEPORT COMMUNICATIONS AMERICA, LLC - MOST LOUIS
(557) 999WIRETAP TELECOM, LLC.SAPPINGTON

Frequently Asked Questions

Where is area code 557?
Area code 557 is located in Missouri, covering cities including St. Louis, Florissant, Chesterfield.
What time zone is area code 557?
Area code 557 is in the Central Time Zone (CT, UTC-6).
What state is area code 557?
Area code 557 is in Missouri.