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Area Code 557

Area code 557 is in Missouri, USA , spanning 1 county and serving 21 cities, including St Louis, University City or Mehlville; it currently uses 35 prefixes, assigned from 557-200-XXXX through 557-999-XXXX.

In service since August 12, 2022, area code 557 is an overlay Numbering Plan Area, part of overlay complex 314/557.

The current local time is .

557 area code location on a map

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For exact boundaries see official 557 area code map

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Locate any 557-NXX prefix:

NPANXX Area served1 Date2
557-200 Ladue 8/8/2022
557-201 Kirkwood 04/14/2023
557-202 St Louis 03/27/2023
557-203 Mehlville 05/19/2023
557-204 St Louis 05/22/2023
557-205 St Louis 06/01/2023
557-206 St Louis 06/01/2023
557-207 Oakville 06/15/2023
557-208 Ladue 09/07/2023
557-210 Ladue 09/21/2023
557-212 Mehlville 09/29/2023
557-213 St Louis 09/29/2023
557-214 St Louis 11/13/2023
557-215 St Louis 11/15/2023
557-216 St Louis 06/01/2023
557-217 Sappington 11/15/2023
557-218 Ladue 12/22/2023
557-219 Ladue 01/18/2024
557-220 Creve Coeur 01/23/2024
557-222 St Louis 05/04/2023
557-224 Creve Coeur 12/15/2023
557-273 St Louis 01/25/2023
557-362 St Louis 01/25/2023
557-454 St Louis 01/25/2023
557-467 St Louis 8/8/2022
557-500 St Louis 8/12/2022
557-507 St Louis 08/16/2023
557-557 St Louis 05/15/2023
557-653 St Louis 01/25/2023
557-747 St Louis 01/25/2023
557-777 Creve Coeur 8/24/2022
557-888 Kirkwood 9/16/2022
557-953 St Louis 01/25/2023
557-996 St Louis 01/25/2023
557-999 Sappington 9/16/2022
  1. For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
  2. Assignment date.
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Cities in area code 557

City1 County Time2
Affton St Louis C
Bridgeton St Louis C
Creve Coeur St Louis C
Earth City St Louis C
Ferguson St Louis C
Florissant St Louis C
Glencoe St Louis C
Hazelwood St Louis C
Kirkwood St Louis C
Ladue St Louis C
Maryland Heights St Louis C
Mehlville St Louis C
Oakville St Louis C
Overland St Louis C
Sappington St Louis C
Spanish Lake St Louis C
St Ann St Louis C
St Louis St Louis C
University City St Louis C
Valley Park St Louis C
Webster Groves St Louis C
  1. Listed above are most places served by USA area code 557. When multiple places in a US state share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
  2. C stands for Central Time Zone (currently ).
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