Cedar Knolls, New Jersey Area Code
Cedar Knolls, NJ is officially utilizing an area code overlay in which area codes 862 and 973 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.
In addition to Cedar Knolls, NJ area code information read more about area codes 862 and 973 details and New Jersey area codes.
Cedar Knolls, NJ is located in Morris County and observes the Eastern Time Zone. View our Times by Area Code tool.
Select Any New Jersey City or Town Alphabetically
Area Codes Look Up By State and City
Area Codes Look Up in Surrounding Places
