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Where Is 231 Area Code?

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Database Updated: July 14, 2025
Michigan Phone Number Lookups
Where Is 231 Area Code?

Where is Area Code 231?

Area Code 231 encompasses several counties in the northwestern portion of Michigan’s Lower Peninsula. It is frequently associated with communities along the Lake Michigan shoreline, as well as inland areas that serve as economic and cultural hubs.

• Notable cities within the 231 area code:
– Muskegon
– Traverse City
– Cadillac
– Ludington
– Petoskey
– Manistee

• Major counties covered:
– Muskegon County
– Oceana County
– Mason County
– Wexford County
– Manistee County
– Antrim County

For specific details on local service providers within this region, individuals may contact the Michigan Public Service Commission’s area code resources. In-person assistance is available at MPSC – 7109 W. Saginaw Hwy, Lansing, MI 48917.

What Time Zone Is 231 Area Code in the USA?

The 231 area code operates under the Eastern Time Zone (ET). Residents and businesses in this area observe Daylight Saving Time, which typically begins the second Sunday in March and concludes the first Sunday in November. Coordination with the national standard is essential for timely communication, particularly for business operations, transportation schedules, and official government affairs.

History of the 231 Area Code

The creation of Area Code 231 was a direct response to the growing demand for telephone numbers within Michigan. Initially part of Area Code 616, the 231 code took form in 1999 to ensure adequate numbering resources for expanding communities and businesses.

Some key milestones in its history include: • 1999 – Area Code 231 was officially split from the 616 code to accommodate population growth and increased telephone use.
• No overlay area code has been assigned to 231 since its inception, meaning residents continue to dial only the standard ten-digit number, without additional numbering complexities.
• Regulatory oversight of area code distribution is managed by the Federal Communications Commission’s telephone numbering resources.

For clarification on state-level regulations or upcoming changes, individuals are encouraged to consult the official sources at FCC – 45 L Street NE, Washington, DC 20554, or the Michigan Public Service Commission at MPSC – 7109 W. Saginaw Hwy, Lansing, MI 48917.

How Many People Use the 231 Area Code?

The 231 area code serves a variety of urban and rural communities, collectively representing several hundred thousand households, commercial entities, and government agencies. Exact population coverage shifts based on each county’s growth, yet it remains substantial enough to represent a significant portion of Northwestern Michigan’s total population.

• Population estimates:
– Muskegon County contributes the largest share of residents within the 231 footprint.
– The northern region of the Lower Peninsula, including Wexford, Antrim, and Manistee counties, provides a spread of smaller cities and townships.
– Seasonal tourism in cities such as Traverse City and Ludington also affects local telephone use, particularly during summer months when visitors require short-term telecommunications arrangements.

Additional data on distribution and numbering resources is maintained by the area code regulatory policies available from the Federal Communications Commission.

Is the 231 Area Code Toll-Free?

The 231 area code is a standard geographic area code and is not designated as a toll-free zone. Calls placed to or from this area code can incur local or long-distance charges, as determined by each telephone service provider. For clarity concerning toll or billing rules, subscribers should review the following:

• Check with local carriers for included calling areas and any additional fees.
• Confirm whether your provider applies long-distance charges for specific out-of-area calls.
• Monitor any regulatory changes announced by the Michigan Public Service Commission’s area code resources.

For further assistance, individuals may reach the Michigan Public Service Commission in person at MPSC – 7109 W. Saginaw Hwy, Lansing, MI 48917 or contact the Federal Communications Commission at FCC – 45 L Street NE, Washington, DC 20554 to determine if any upcoming changes or special rules might impact calling options within the 231 region.

Cities in 231 Area Code
  • Muskegon
  • Norton Shores
  • Traverse City
  • Muskegon Heights
  • Big Rapids
  • Cadillac
  • Ludington
  • Manistee
  • Petoskey
  • Cheboygan
  • Wolf Lake
  • Fremont
  • Roosevelt Park
  • North Muskegon
  • Boyne City
  • Canadian Lakes
  • Whitehall
  • Charlevoix
  • Reed City
  • Montague
  • East Jordan
  • Hart
  • Shelby
  • Kalkaska
  • Newaygo
  • Indian River
  • Evart
  • Howard City
  • Twin Lake
  • Elk Rapids
  • Greilickville
  • Kingsley
  • White Cloud
  • Mancelona
  • Rapid City
  • Lakewood Club
  • Manton
  • Frankfort
  • Ravenna
  • Scottville
  • Baldwin
  • Harbor Springs
  • Bellaire
  • Fruitport
  • Hesperia
  • Central Lake
  • Chums Corner
  • Lakes of the North
  • Grant
  • Marion
Counties in 231 Area Code
  • Grand Traverse
  • Muskegon
  • Newaygo
  • Wexford
  • Mecosta
  • Osceola
  • Cheboygan
  • Antrim
  • Emmet
  • Kalkaska
  • Missaukee
  • Charlevoix
  • Mason
  • Lake
  • Oceana
  • Manistee
  • Montcalm
  • Benzie
  • Leelanau
  • Clare
  • Otsego
Prefix Codes for Area Code 231
  • (231) 201
  • (231) 202
  • (231) 203
  • (231) 204
  • (231) 205
  • (231) 206
  • (231) 207
  • (231) 208
  • (231) 209
  • (231) 214
  • (231) 215
  • (231) 217
  • (231) 218
  • (231) 219
  • (231) 220
  • (231) 222
  • (231) 223
  • (231) 224
  • (231) 225
  • (231) 226
  • (231) 227
  • (231) 228
  • (231) 229
  • (231) 230
  • (231) 232
  • (231) 233
  • (231) 235
  • (231) 236
  • (231) 237
  • (231) 238
  • (231) 239
  • (231) 240
  • (231) 241
  • (231) 242
  • (231) 243
  • (231) 245
  • (231) 249
  • (231) 250
  • (231) 255
  • (231) 256
Michigan Area Codes
  • 231
  • 248
  • 269
  • 313
  • 517
  • 586
  • 616
  • 734
  • 810
  • 906
  • 947
  • 989
Michigan Phone Numbers
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