Question 1

What is the area code for Union City?

Accepted Answer

The main area code for Union City, California is 510. Union City is now served by 2 area codes in total: 510, 341.

Question 2

How many area codes does Union City have?

Accepted Answer

Union City has 2 area codes: 510, 341.

Question 3

Why does Union City have more than one area code?

Accepted Answer

As Union City used up the numbers available in its original area code (510, in service since 1991), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.

Question 4

How do you dial a Union City number?

Accepted Answer

Dial all 10 digits — the area code (510 or 341) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.

Area codes in Union City, California

Area codes serving Union City

Nearby cities