231 Rate Centers & Exchanges
18 rate centers · Michigan · Eastern Time
A rate center is the geographic unit used by phone carriers to determine local calling areas and billing. Each rate center has a specific name and set of NXX exchanges (the 3-digit prefix after the area code) assigned to it. The map below shows the 18 rate centers within area code 231.
Rate Center Locations
18 centers in area code 231All Rate Centers in Area Code 231
| Rate Center |
|---|
|
Alanson
|
|
Alden
|
|
Baldwin
|
|
Big Rapids
|
|
Cadillac
|
|
Charlevoix
|
|
Cheboygan
|
|
Elmira
|
|
Lake Ann
|
|
Ludington
|
|
Luther
|
|
Mancelona
|
|
Muskegon
|
|
Newaygo
|
|
Reed City
|
|
Torch River Bridge
|
|
Traverse City
|
|
Whitehall
|