Question 1

What is the area code for St. Louis?

Accepted Answer

The main area code for St. Louis, Missouri is 314. St. Louis is now served by 3 area codes in total: 314, 636, 557.

Question 2

How many area codes does St. Louis have?

Accepted Answer

St. Louis has 3 area codes: 314, 636, 557.

Question 3

Why does St. Louis have more than one area code?

Accepted Answer

As St. Louis used up the numbers available in its original area code (314, 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 St. Louis number?

Accepted Answer

Dial all 10 digits — the area code (314 or 636 or 557) followed by the 7-digit local number. From outside the U.S., dial +1, then the area code and number.

Area codes in St. Louis, Missouri

Area codes serving St. Louis