Area code 231 — Muskegon, Michigan

Where is area code 231?

Area code 231 is in Muskegon, Michigan, covering Muskegon and surrounding communities in Michigan. All 231 numbers are on Eastern Time.

Is area code 231 a scam?

No. Area code 231 is a legitimate area code serving Muskegon since 1999. Scammers spoof caller ID to display 231 numbers, which is why complaints exist against a code that is itself genuine.

Neighbour spoofing is the reason a local-looking number is not a guarantee. A caller anywhere in the world can display a 231 number, and the number they display may belong to a real business in Muskegon that has nothing to do with the call.

• ·Area code 231 had 668 different numbers reported for spam calls in the 30 days to 28 July 2026.
• ·Area code 231 ranks 73rd of 331 US geographic area codes by spam complaint volume.
• ·Of the 719 complaints about area code 231 in the 30 days to 28 July 2026, 80% were reported as a recorded message or robocall.
• ·The most reported subject on area code 231 is reducing your debt (credit cards, mortgage, student loans), appearing in 34% of its complaints in the 30 days to 28 July 2026.

What these calls were about

Each figure is that subject’s share of every 231 complaint in the 30 days to 28 July 2026, as categorised by the consumer who reported it.

Businesses can prevent their own numbers from being mistaken for calls like these.

Why am I getting text messages from area code 231?

Texts from 231 numbers follow the same pattern as calls — mostly local businesses and services. Treat any text asking for payment or credentials as suspect regardless of the code.

The common patterns are a wrong-number opener that turns into conversation, an unsolicited job offer, and a crypto or investment tip. Do not reply, do not follow the link, and forward the message to 7726 (SPAM) to report it to your carrier.

Who works in the Muskegon area?

Area code 231 covers the western and northwestern reaches of Michigan's Lower Peninsula, from Muskegon on Lake Michigan's shore up through Traverse City and the resort country beyond. Muskegon, Michigan carries the industrial end of the code. The town built ships and engines for a century, and manufacturing still matters, with foundries, metalworking shops, and suppliers tied to the furniture and auto industries of West Michigan. The port handles Great Lakes cargo, healthcare through Trinity Health Muskegon is a top employer, and the lakeshore's beaches pull a growing summer trade. In 2024 Muskegon's median household income was $44,735 and its employed population was about 14,300, per DataUSA.

Who lives in the 231 region

The city itself is small, around 37,000 people, and working-class in composition, with Black residents making up 10,800 of the population and a poverty rate of 24.9 percent in 2024, per DataUSA. The wider 231 territory tells a different story north of town, where Traverse City's wine, cherry, and tourism economy draws second-home money and the seasonal population swells every summer.

What a 231 number signals to a caller

Callers describe business across the 231 as neighborly and unhurried, done between people who expect to see each other at the hardware store. The code has covered the region since 1999, and it spans two economies, factory towns along the southern lakeshore and resort country to the north, so what a 231 number signals depends on the exchange behind it. Anyone dialling in should know the northern half of the code practically reschedules itself around summer, when tourism runs the calendar.

Questions