Since my parents’ rural county was assigned a new area code in the late 1990s, they’ve had to dial eleven digits (1-555-555-5555) even just to call across the street. It sucks. We still have seven-digit dialing where I live.
The municipal government of the rather large city in which I live has that. Very convenient. I can call city hall, the police department, parks and rec, coworkers in my court, etc. just by picking up the phone and dialing four digits.
This thread may be of interest, too: When will all the area codes run out?