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  1. Our NPA NXX Area Code database is precise and comprehensive. Because we offer so many fields of valuable data, the NPA NXX Database is a very powerful business tool for all types of businesses. All area code database and maps come with a 1 year subscription and are accessible directly from your ac

  2. Area Code: Prefix -- 4 digits ()-. . . Enter 10 digits for best search. Leave what you don't know blank. or enter City name: or Zip code Search international ...

  3. An area code overlay is the addition of another area code (840) to the same geographic region served by an existing area code (909). An overlay does not require customers to change their existing area code, but does require customers to use a new dialing procedure to complete telephone calls.

  4. This area code was assigned on April 1st, 1999. On September 23rd, 2008 it went into service. 657 is a General Purpose Code. 657 service area does overlap with 714 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.

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