Lookup › Area code 231
231 Area Code — Muskegon, Michigan
Area code 231 serves Muskegon, MI.
Most looked-up 231 numbers
Phone prefixes in 231
Carriers serving 231
- Verizon (4 numbers)
- T-Mobile (1 numbers)
- At&t (1 numbers)
- Teleport Communications Americ (1 numbers)
Frequently asked questions
Where is area code 231?
Area code 231 serves Muskegon, MI.
What prefixes are in area code 231?
Phone2.io tracks 6 phone prefixes in area code 231, with carrier and spam-report data on individual numbers.
More about area code 231
Area code 231 overview, history, and local numbers · Get a MI phone number
Last updated: January 14, 2026