Question 1

What is the area code for Rockville?

Accepted Answer

The main area code for Rockville, Maryland is 301. Rockville is now served by 3 area codes in total: 301, 240, 227.

Question 2

How many area codes does Rockville have?

Accepted Answer

Rockville has 3 area codes: 301, 240, 227.

Question 3

Why does Rockville have more than one area code?

Accepted Answer

As Rockville used up the numbers available in its original area code (301, 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 Rockville number?

Accepted Answer

Dial all 10 digits — the area code (301 or 240 or 227) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.

Area codes in Rockville, Maryland

Area codes serving Rockville

Nearby cities