840 Rate Centers & Exchanges
10 rate centers · California · Pacific 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 10 rate centers within area code 840.
Rate Center Locations
10 centers in area code 840All Rate Centers in Area Code 840
| Rate Center |
|---|
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Big Bear City
|
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Chino
|
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Colton
|
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Diamond Bar
|
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Ontario
|
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Pomona
|
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Redlands
|
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Rialto
|
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San Bernardino
|
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Upland
|