Area Code 231

Michigan (MI) • Muskegon, Traverse City, Afton, Alanson, Alba, Alden, Arcadia, Bailey • Eastern Time (ET)

What Stands Out

•Coverage: 698.3K people across 136 ZIP codes.
•Major cities: Muskegon, Traverse City, Afton.

Spotlight: Coverage

Snapshot highlights for area code 231.

Income

45th

Home values

53rd

Poverty rate

60th

Area Code Basics

Primary State

Michigan (MI)

States Served

Michigan (MI)

Major Cities

Muskegon, Traverse City, Afton, Alanson, Alba, Alden, Arcadia, Bailey

Time Zone(s)

Eastern Time (ET)

Est. Population

698.3K

ZIP Codes

136

Data accuracy & methodology

This report aggregates 2020–2024 ACS 5-year estimates and geographic overlays for orientation. Area-code service areas can cross ZIP/state boundaries and change over time; verify official assignments with NANPA for critical use.