557 Rate Centers & Exchanges
3 rate centers · Missouri · Central Time
A rate center is the geographic unit used by phone carriers to determine local calling areas and billing. Each rate center has a specific name and set of NXX exchanges (the 3-digit prefix after the area code) assigned to it. The map below shows the 3 rate centers within area code 557.
Rate Center Locations
3 centers in area code 557All Rate Centers in Area Code 557
| Rate Center |
|---|
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Creve Coeur
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Ladue
|
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St Louis
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