Phone prefix +1-231220
Phone prefix: +1231220
This prefix is distributed within the state Michigan
The largest city within this prefix is Muskegon, MI
District: Muskegon
The largest organization: Local Exchange Carriers Of Michigan
Time Zone: Eastern
Winter time: UTC-5
Summer time: UTC-4
The largest city within the prefix of +1-231220.... numbers is shown below
Muskegon, MI.