Area codes in Clifton, New Jersey
Clifton, New Jersey uses 2 area codes — 973 and 862. The main Clifton area code is 973.
Area codes serving Clifton
Phone numbers in Clifton are written as ten digits — for example (973) 555-0190 — and fall in the Eastern Time zone.
How Clifton came to have 2 area codes
The original Clifton area code is 973, in service since 1997. As the area ran low on available numbers, an overlay code was added over the same region for new phone lines: 862 (2001). Existing numbers kept their original code — an overlay never forces anyone to change their number — which is why Clifton now uses all 2 codes and every local call is dialed with ten digits.
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Frequently asked questions
What is the area code for Clifton?
The main area code for Clifton, New Jersey is 973. Clifton is now served by 2 area codes in total: 973, 862.
How many area codes does Clifton have?
Clifton has 2 area codes: 973, 862.
Why does Clifton have more than one area code?
As Clifton used up the numbers available in its original area code (973, in service since 1997), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.
How do you dial a Clifton number?
Dial all 10 digits — the area code (973 or 862) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.