Question 1

What is the area code for Joliet?

Accepted Answer

The main area code for Joliet, Illinois is 815. Joliet is now served by 2 area codes in total: 815, 779.

Question 2

How many area codes does Joliet have?

Accepted Answer

Joliet has 2 area codes: 815, 779.

Question 3

Why does Joliet have more than one area code?

Accepted Answer

As Joliet used up the numbers available in its original area code (815, in service since 1947), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.

Question 4

How do you dial a Joliet number?

Accepted Answer

Dial all 10 digits — the area code (815 or 779) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.

Area codes in Joliet, Illinois

Area codes serving Joliet

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