Area code 557 is in Missouri (MO), USA and some of the main locations it covers are St Louis, University City, Mehlville, etc. (jump to city list below).
In service since August 12, 2022, area code 557 is an overlay Numbering Plan Area, part of overlay complex 314/557 (overlaying NPAs cover the same area).
The current time for places served by area code 557 is 02:16:07 PM (Central Time Zone).
| 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 |
| 557-216 | St Louis | 06/01/2023 |
| 557-222 | St Louis | 05/04/2023 |
| 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 |
| 557-557 | 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 |
| 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 |