http://debianws.lexgopc.com/wiki143/index.php?action=history&feed=atom&title=Area_code_231Area code 231 - Revision history2026-10-26T17:10:34ZRevision history for this page on the wikiMediaWiki 1.43.1http://debianws.lexgopc.com/wiki143/index.php?title=Area_code_231&diff=3076269&oldid=previmported>Eastmain: removed stray </ref>2025-06-25T17:52:37Z<p>removed stray </ref></p>
<p><b>New page</b></p><div>{{short description|Area code in Michigan, United States}}<br />
[[File:MI area code 231.png|thumb|right|Map of area code 231 in Michigan.]]<br />
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'''Area code 231''' is a telephone [[area code]] in the [[North American Numbering Plan]] (NANP) for the northwestern portion of the [[Lower Peninsula of Michigan|Lower Peninsula]] in the [[U.S. state]] of [[Michigan]],<br />
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== History ==<br />
Area code 231 was created in June 1999 by an [[area code split]] of [[area code 616]], which had served the entire western half of the Lower Peninsula, extending west from the north-south line aligned with the [[Mackinac Bridge]]. 231 was carved out of the northern part. It is centered around the western half of the territory generally defined as [[Northern Michigan]]. It also includes [[Muskegon]], which is almost universally counted as part of [[West Michigan]].<br />
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==Service area==<br />
Area code 231 includes (but is not limited to) the following communities:<br />
{{Div col|content=* [[Big Rapids, Michigan|Big Rapids]]<br />
* [[Boyne City, Michigan|Boyne City]]<br />
* [[Cadillac, Michigan|Cadillac]]<br />
* [[Charlevoix, Michigan|Charlevoix]]<br />
* [[Cheboygan, Michigan|Cheboygan]]<br />
* [[East Jordan, Michigan|East Jordan]]<br />
* [[Elk Rapids, Michigan|Elk Rapids]]<br />
* [[Harbor Springs, Michigan|Harbor Springs]]<br />
* [[Hart, Michigan|Hart]]<br />
* [[Kalkaska, Michigan|Kalkaska]]<br />
* [[Kingsley, Michigan|Kingsley]]<br />
* [[Lake City, Michigan|Lake City]]<br />
* [[Ludington, Michigan|Ludington]]<br />
* [[Mackinaw City, Michigan|Mackinaw City]]<br />
* [[Manistee, Michigan|Manistee]]<br />
* [[Muskegon, Michigan|Muskegon]]<br />
* [[Newaygo, Michigan|Newaygo]]<br />
* [[Norton Shores, Michigan|Norton Shores]]<br />
* [[Petoskey, Michigan|Petoskey]]<br />
* [[Traverse City, Michigan|Traverse City]]}}<br />
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In addition, 231 also includes [[Bois Blanc Township, Michigan|Bois Blanc Township]], which is part of the Upper Peninsula. It is the only municipality in the Upper Peninsula that uses 231, while the rest uses [[Area code 906|906]].<br />
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==External links==<br />
* [http://www.nationalnanpa.com/pdf/pl-nanp-167.pdf Planning letter 167, which details 231's creation] (PDF)<br />
* {{Cite web |title=Michigan [map] {{!}} NANPA |url=https://www.nanpa.com/resources/area-code-map/michigan |access-date=2025-06-25 |website=NANPA}}<br />
*[http://www.nanpa.com/area_code_maps/display.html?mi Map of Michigan area codes] {{Webarchive|url=https://web.archive.org/web/20080630055917/http://www.nanpa.com/area_code_maps/display.html?mi |date=2008-06-30 }} at [[North American Numbering Plan Administration]]'s website<br />
*[https://web.archive.org/web/20081017115948/http://www.areacodedownload.com/231/index.html List of exchanges from AreaCodeDownload.com, 231 Area Code]<br />
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{{Area code box | State = MI | This = 231<br />
| N = [[area code 906|906]]<br />
| W = [[Lake Michigan]]<br />
| E = [[area code 989|989]]<br />
| S = [[area code 616|616]]}}<br />
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{{coord|44.5|N|85.5|W|region:US-MI_scale:1000000|display=title}}<br />
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[[Category:Telecommunications-related introductions in 1999]]<br />
[[Category:Area codes in the United States|231]]<br />
[[Category:Area codes in Michigan|231]]<br />
[[Category:West Michigan]]<br />
[[Category:Northern Michigan]]<br />
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{{Michigan-geo-stub}}<br />
{{areacode-stub}}</div>imported>Eastmain