Question 1

What is the area code for Sunnyvale?

Accepted Answer

The main area code for Sunnyvale, California is 408. Sunnyvale is now served by 2 area codes in total: 408, 669.

Question 2

How many area codes does Sunnyvale have?

Accepted Answer

Sunnyvale has 2 area codes: 408, 669.

Question 3

Why does Sunnyvale have more than one area code?

Accepted Answer

As Sunnyvale used up the numbers available in its original area code (408, in service since 1959), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.

Question 4

How do you dial a Sunnyvale number?

Accepted Answer

Dial all 10 digits — the area code (408 or 669) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.

Area codes in Sunnyvale, California

Area codes serving Sunnyvale

Nearby cities