Where is Area Code 231?

Located in the state of Michigan (MI)

Area Code 231

Area Code 231 507 RESULTS FOUND
The 231 Area Code is located in the state of Michigan. Area Code 231 is one of the 312 three-digit telephone area codes in the USA. It covers roughly 181,370 unique phone numbers.
State:Michigan (MI)
Phone Prefixes
Phone Prefixes:507
Phone Numbers
Phone Numbers: 181,370

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