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231 is the only area code for its territory.
Numbers in area code 231 are in the Eastern time zone.
Area code 231 has been in service since 1999.
A local number gives callers in Michigan a number they recognize, wherever your team works:
People are more likely to answer and call back a number with their own area code. A 231 number shows customers in Michigan that you’re part of their community.
Give out your 231 number for work, listings, and online forms, and keep your personal number for friends and family.
Use your 231 number from your phone, your computer, or the EasyRinger app, whether you’re in Michigan or abroad.
Plans start at $10 per month with no contract and nothing to install. Set up your number in minutes and cancel any time.