Where is Area Code 231?

Located in the state of Michigan (MI)

Area Code 231

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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
State:Michigan (MI)
Phone Prefixes
Phone Prefixes:507
Phone Numbers
Phone Numbers: 181,370

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