Area code 557 — Missouri
Area code 557 is in Missouri and serves St. Louis, St. Louis County, Florissant, Crestwood. Time zone, overlays, counties and ZIP codes.
| Location | Missouri (St. Louis, St. Louis County, Florissant, Crestwood, Hazelwood, Kirkwood, and surrounding suburbs of St. Louis) |
|---|---|
| Main places | St. Louis, St. Louis County, Florissant, Crestwood, Hazelwood, Kirkwood |
| State | Missouri |
| Status | In service · since 2022 |
| Time zone | Central · |
| Overlay codes | 314 Overlays share the same area. Local calls usually need 10-digit dialing. |
| Local dialing | 10 digits |
History
- Overlaid on 314
Counties (approximate)
Saint CharlesSt. Charles CountySt. Louis (city)St. Louis CountySt. Louis city
ZIP codes in area code 557
Approximate: area code boundaries follow telephone rate centers, not ZIP codes.
63031 Florissant63033 Florissant63034 Florissant63042 Hazelwood63043 Maryland Heights63044 Bridgeton63045 Earth City63074 Saint Ann63101 Saint Louis63102 Saint Louis63103 Saint Louis63104 Saint Louis63105 Saint Louis63106 Saint Louis63107 Saint Louis63108 Saint Louis63109 Saint Louis63110 Saint Louis63111 Saint Louis63112 Saint Louis63113 Saint Louis63114 Saint Louis63115 Saint Louis63116 Saint Louis63117 Saint Louis63118 Saint Louis63119 Saint Louis63120 Saint Louis63121 Saint Louis63124 Saint Louis63125 Saint Louis63130 Saint Louis63132 Saint Louis63133 Saint Louis63134 Saint Louis63135 Saint Louis63136 Saint Louis63137 Saint Louis63138 Saint Louis63139 Saint Louis
Format a 557 number
US numbers are written as (557) 555-0123 or 557-555-0123. From outside the US, dial +1 557 555 0123.
Is a call from 557 a scam?
An area code only tells you where a number was assigned. Caller ID can be faked (“spoofed”), so do not trust a call just because the area code looks local. Never share codes or payment details with unexpected callers.
Sources: NANPA via NumberResearch.org (CC BY 4.0); place names and history from Wikipedia (CC BY-SA 4.0). See data sources.