Area codes in Grand Junction, Colorado
Grand Junction, Colorado uses 2 area codes — 970 and 748. The main Grand Junction area code is 970.
Area codes serving Grand Junction
Phone numbers in Grand Junction are written as ten digits — for example (970) 555-0190 — and fall in the Mountain Time zone.
How Grand Junction came to have 2 area codes
The original Grand Junction area code is 970, in service since 1995. As the area ran low on available numbers, an overlay code was added over the same region for new phone lines: 748 (2025). Existing numbers kept their original code — an overlay never forces anyone to change their number — which is why Grand Junction 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 Grand Junction?
The main area code for Grand Junction, Colorado is 970. Grand Junction is now served by 2 area codes in total: 970, 748.
How many area codes does Grand Junction have?
Grand Junction has 2 area codes: 970, 748.
Why does Grand Junction have more than one area code?
As Grand Junction used up the numbers available in its original area code (970, in service since 1995), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.
How do you dial a Grand Junction number?
Dial all 10 digits — the area code (970 or 748) 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.