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400 Area Code Phone Directory
Phone Prefixes in the 400 Area Code
Information for Area Code 400
Largest City in Area: ROANOKE
Where is Area Code 400?
Area code (400) is in the state of VA. Below, are the major cities in the area code (400).
Area Codes Starting with 4
Major Cities in 400
ROANOKE, VA (115)
SYRACUSE, NY (90)
CLEVELAND, OH (54)
SAN JOSE, CA (48)
BALTIMORE, MD (40)
LIVERPOOL, NY (39)
ORLANDO, FL (34)
ATLANTA, GA (32)
OKLAHOMA CITY, OK (29)
LORAIN, OH (24)