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640 Area Code Phone Directory
Phone Prefixes in the 640 Area Code
Information for Area Code 640
Largest City in Area: CEDAR RAPIDS
Where is Area Code 640?
Area code (640) is in the state of IA. Below, are the major cities in the area code (640).
Area Codes Starting with 6
Major Cities in 640
CEDAR RAPIDS, IA (43)
NEW YORK, NY (42)
DES MOINES, IA (39)
BRONX, NY (32)
LOUISVILLE, KY (30)
DAVENPORT, IA (26)
BROOKLYN, NY (23)
PHILADELPHIA, PA (23)
WICHITA FALLS, TX (22)
AMES, IA (19)