557 Area Code

SE Missouri

November 12, 2025

Area Code:	557
State/Region:	SE Missouri
Major Cities:	St. Louis

Time Zone:	Central
Current Time:	10:57 PM

Date Assigned:	10/30/00
In Service Since:
Overlay?:	Yes
Overlay Complex:	314/557

Local Call Dialing:	10D
Toll Call Dialing:	1+10D

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557 Prefixes/Exchanges

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