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Updated Jan 02, 2010Area Code 231
  1. "E" is Eastern Time Zone, "C" is Central Time Zone, "M" is Mountain Time Zone, and "P" is Pacific Time Zone. Occasionally, an area code will fall in more than one time zone. In this case, the abbreviation is a combination of the previous abbreviations. Some area codes are shown with time zones referencing Universal Coordinated Time (UTC).
  2. Additional technical status can be retrived from the North American Numbering Plan Administration on the 231 area code specific link here.
Area Code231 (area code map)
LocationMichigan
Dates and historical informationArea code 231 went live into service on June 05, 1999.  It was formed as a subdivision of the 616 area code.
Technical Status 2Area code 231 is currently live and in service.
Time Zone(s) 1E
LATA numbers served348
Number of rate centers served99
List of rate centersCHIPPEWALK, MECOSTA, ALANSON, FIFE LAKE, BRUTUS, MUSKEGON, HONOR, BOYNEFALLS, SUTTONSBAY, LE ROY, BEAR LAKE, TRAVERSECY, MERRITT, EASTJORDAN, OLDMISSION, FREMONT, GLEN LAKE, MOORESTOWN, ELMIRA, LUDINGTON, LEVERING, LAKE CITY, CHARLEVOIX, INDIAN RIV, LAKE ANN, PENTWATER, HARBOR SPG, NEWAYGO, CHEBOYGAN, BIG RAPIDS, ONEKAMA, LKLEELANAU, KALKASKA, SHELBY, KINGSLEY, ELK RAPIDS, IRONS, WILLIAMSBG, BUCKLEY, INTERLOCHN, GRANT, HART, PETOSKEY, CADILLAC, MORLEY, MANISTEE, FRANKFORT, BOYNE CITY, MACKINAWCY, TRCHRIVBDG, ALDEN, MCBAIN, BALDWIN, REED CITY, BELLAIRE, SCOTTVILLE, CORAL, MANCELONA, CENTRAL LK, KALEVA, WOLVERINE, FRUITPORT, SOBOARDMAN, EVART, CLAM RIVER, COPESHTNVL, BEULAH, NORTHPORT, HARRIETTA, STANWOOD, CARR, ST JAMES, HESPERIA, FOUNTAIN, FREESOIL, BRETHREN, LUTHER, WALLOON LK, PELLSTON, ALBA, LAKE NORTH, ELLSWORTH, EASTPORT, BOIS BLANC, HOWARDCITY, DUBLIN, MARION, WHITECLOUD, WELLSTON, AMBLE, HOLTON, MANTON, FALMOUTH, TWIN LAKE, TUSTIN, RAVENNA, HOXEYVILLE, MESICK, WHITEHALL
Number of major cities served132
Names of major cities served (ZIP code)Pontiac (48342), Chippewa Lake (49320), Mecosta (49332), Alanson (49706), Fife Lake (49633), Brutus (49716), Muskegon (49444), Meskegon (49444), Norton Shores (49444), Muskegon Heights (49444), Muskegon Hts (49444), Honor (49640), Boyne Falls (49713), Suttons Bay (49682), Peshawbestown (49682), Leroy (49655), Le Roy (49655), Bear Lake (49614), Pierport (49614), Traverse City (49684), Merritt (49667), East Jordan (49727), Old Mission (49673), Fremont (49412), Glen Arbor (49636), Cedar (49621), Lake City (49651), Moorestown (49651), Elmira (49730), Ludington (49431), Levering (49755), Charlevoix (49720), Indian River (49749), Lake Ann (49650), Pentwater (49449), Harbor Springs (49740), Harbor Point (49740), Harbor Spgs (49740), Wequetonsing (49740), Newaygo (49337), Croton (49337), Cheboygan (49721), Big Rapids (49307), Onekama (49675), Lake Leelanau (49653), Kalkaska (49646), Shelby (49455), Kingsley (49649), Elk Rapids (49629), Irons (49644), Peacock (49644), Williamsburg (49690), Buckley (49620), Grawn (49637), Grant (49327), Hart (49420), Petoskey (49770), Bay Harbor (49770), Bay View (49770), Cadillac (49601), Hoxeyville (49601), Morley (49336), Manistee (49660), Stronach (49660), Frankfort (49635), Boyne City (49712), Mackinaw City (49701), Mackinac City (49701), Rapid City (49676), Empire (49630), Alden (49612), Mc Bain (49657), Baldwin (49304), Reed City (49677), Bellaire (49615), Scottville (49454), Trufant (49347), Mancelona (49659), Central Lake (49622), Kaleva (49645), Wolverine (49799), Fruitport (49415), South Boardman (49680), S Boardman (49680), Evart (49631), Copemish (49625), Beulah (49617), Northport (49670), North Port (49670), Northport Point (49670), Harrietta (49638), Stanwood (49346), Canadian Lake (49346), Canadian Lakes (49346), Branch (49402), Beaver Island (49782), Saint James (49782), Hesperia (49421), Fountain (49410), Brethren (49619), Luther (49656), Walloon Lake (49796), Pellston (49769), Grand Rapids (49503), Wyoming (49503), Gr (49503), Muskegon (49440), Meskegon (49440), Galesburg (49053), Ellsworth (49729), Eastport (49627), Pointe Aux Pins (49775), Bois Blanc Is (49775), Bois Blanc Island (49775), Point Aux Pin (49775), Howard City (49329), Wellston (49689), Marion (49665), White Cloud (49349), Muskegon (49445), Meskegon (49445), N Muskegon (49445), North Muskegon (49445), Muskegon (49441), Meskegon (49441), Norton Shores (49441), Roosevelt Pk (49441), Muskegon (49442), Meskegon (49442), Holton (49425), Brunswick (49425), Manton (49663), Falmouth (49632), Twin Lake (49457), Lakewood Club (49457), Tustin (49688), Ravenna (49451), Mesick (49668), Whitehall (49461), Sylvan Beach (49461), Acme (49610)
Number of exchanges served457
List of exchanges served231-201-xxxx, 231-202-xxxx, 231-203-xxxx, 231-204-xxxx, 231-205-xxxx, 231-206-xxxx, 231-207-xxxx, 231-208-xxxx, 231-209-xxxx, 231-214-xxxx, 231-215-xxxx, 231-217-xxxx, 231-218-xxxx, 231-219-xxxx, 231-220-xxxx, 231-222-xxxx, 231-223-xxxx, 231-224-xxxx, 231-225-xxxx, 231-226-xxxx, 231-228-xxxx, 231-229-xxxx, 231-230-xxxx, 231-232-xxxx, 231-233-xxxx, 231-235-xxxx, 231-236-xxxx, 231-237-xxxx, 231-238-xxxx, 231-239-xxxx, 231-240-xxxx, 231-241-xxxx, 231-242-xxxx, 231-243-xxxx, 231-245-xxxx, 231-249-xxxx, 231-250-xxxx, 231-255-xxxx, 231-256-xxxx, 231-258-xxxx, 231-259-xxxx, 231-262-xxxx, 231-263-xxxx, 231-264-xxxx, 231-266-xxxx, 231-267-xxxx, 231-268-xxxx, 231-269-xxxx, 231-271-xxxx, 231-274-xxxx, 231-275-xxxx, 231-276-xxxx, 231-282-xxxx, 231-286-xxxx, 231-288-xxxx, 231-290-xxxx, 231-301-xxxx, 231-302-xxxx, 231-305-xxxx, 231-306-xxxx, 231-307-xxxx, 231-308-xxxx, 231-309-xxxx, 231-312-xxxx, 231-313-xxxx, 231-314-xxxx, 231-315-xxxx, 231-316-xxxx, 231-317-xxxx, 231-318-xxxx, 231-319-xxxx, 231-320-xxxx, 231-322-xxxx, 231-323-xxxx, 231-325-xxxx, 231-326-xxxx, 231-328-xxxx, 231-329-xxxx, 231-330-xxxx, 231-331-xxxx, 231-332-xxxx, 231-333-xxxx, 231-334-xxxx, 231-335-xxxx, 231-336-xxxx, 231-337-xxxx, 231-338-xxxx, 231-339-xxxx, 231-340-xxxx, 231-341-xxxx, 231-342-xxxx, 231-343-xxxx, 231-344-xxxx, 231-345-xxxx, 231-346-xxxx, 231-347-xxxx, 231-348-xxxx, 231-349-xxxx, 231-350-xxxx, 231-351-xxxx, 231-352-xxxx, 231-353-xxxx, 231-354-xxxx, 231-355-xxxx, 231-356-xxxx, 231-357-xxxx, 231-358-xxxx, 231-360-xxxx, 231-361-xxxx, 231-362-xxxx, 231-363-xxxx, 231-365-xxxx, 231-366-xxxx, 231-368-xxxx, 231-369-xxxx, 231-372-xxxx, 231-373-xxxx, 231-377-xxxx, 231-378-xxxx, 231-382-xxxx, 231-383-xxxx, 231-384-xxxx, 231-386-xxxx, 231-388-xxxx, 231-389-xxxx, 231-392-xxxx, 231-394-xxxx, 231-395-xxxx, 231-398-xxxx, 231-399-xxxx, 231-404-xxxx, 231-408-xxxx, 231-409-xxxx, 231-414-xxxx, 231-416-xxxx, 231-420-xxxx, 231-421-xxxx, 231-423-xxxx, 231-424-xxxx, 231-425-xxxx, 231-429-xxxx, 231-432-xxxx, 231-435-xxxx, 231-436-xxxx, 231-437-xxxx, 231-438-xxxx, 231-439-xxxx, 231-440-xxxx, 231-441-xxxx, 231-445-xxxx, 231-448-xxxx, 231-450-xxxx, 231-452-xxxx, 231-457-xxxx, 231-459-xxxx, 231-460-xxxx, 231-462-xxxx, 231-463-xxxx, 231-464-xxxx, 231-465-xxxx, 231-468-xxxx, 231-477-xxxx, 231-480-xxxx, 231-482-xxxx, 231-486-xxxx, 231-487-xxxx, 231-488-xxxx, 231-492-xxxx, 231-494-xxxx, 231-498-xxxx, 231-499-xxxx, 231-508-xxxx, 231-509-xxxx, 231-510-xxxx, 231-512-xxxx, 231-514-xxxx, 231-515-xxxx, 231-516-xxxx, 231-518-xxxx, 231-519-xxxx, 231-520-xxxx, 231-522-xxxx, 231-525-xxxx, 231-526-xxxx, 231-527-xxxx, 231-529-xxxx, 231-532-xxxx, 231-533-xxxx, 231-534-xxxx, 231-535-xxxx, 231-536-xxxx, 231-537-xxxx, 231-538-xxxx, 231-539-xxxx, 231-543-xxxx, 231-544-xxxx, 231-546-xxxx, 231-547-xxxx, 231-548-xxxx, 231-549-xxxx, 231-556-xxxx, 231-557-xxxx, 231-563-xxxx, 231-564-xxxx, 231-568-xxxx, 231-569-xxxx, 231-570-xxxx, 231-571-xxxx, 231-577-xxxx, 231-578-xxxx, 231-580-xxxx, 231-582-xxxx, 231-583-xxxx, 231-584-xxxx, 231-585-xxxx, 231-587-xxxx, 231-588-xxxx, 231-590-xxxx, 231-591-xxxx, 231-592-xxxx, 231-593-xxxx, 231-594-xxxx, 231-596-xxxx, 231-597-xxxx, 231-598-xxxx, 231-599-xxxx, 231-604-xxxx, 231-605-xxxx, 231-606-xxxx, 231-607-xxxx, 231-608-xxxx, 231-613-xxxx, 231-614-xxxx, 231-615-xxxx, 231-620-xxxx, 231-622-xxxx, 231-623-xxxx, 231-624-xxxx, 231-625-xxxx, 231-627-xxxx, 231-628-xxxx, 231-629-xxxx, 231-631-xxxx, 231-632-xxxx, 231-633-xxxx, 231-634-xxxx, 231-635-xxxx, 231-636-xxxx, 231-637-xxxx, 231-638-xxxx, 231-639-xxxx, 231-640-xxxx, 231-642-xxxx, 231-643-xxxx, 231-644-xxxx, 231-645-xxxx, 231-646-xxxx, 231-647-xxxx, 231-648-xxxx, 231-649-xxxx, 231-651-xxxx, 231-652-xxxx, 231-656-xxxx, 231-660-xxxx, 231-662-xxxx, 231-667-xxxx, 231-668-xxxx, 231-670-xxxx, 231-672-xxxx, 231-674-xxxx, 231-675-xxxx, 231-676-xxxx, 231-677-xxxx, 231-678-xxxx, 231-679-xxxx, 231-680-xxxx, 231-681-xxxx, 231-682-xxxx, 231-683-xxxx, 231-686-xxxx, 231-689-xxxx, 231-690-xxxx, 231-693-xxxx, 231-694-xxxx, 231-695-xxxx, 231-697-xxxx, 231-698-xxxx, 231-704-xxxx, 231-709-xxxx, 231-712-xxxx, 231-714-xxxx, 231-715-xxxx, 231-719-xxxx, 231-720-xxxx, 231-721-xxxx, 231-722-xxxx, 231-723-xxxx, 231-724-xxxx, 231-725-xxxx, 231-726-xxxx, 231-727-xxxx, 231-728-xxxx, 231-729-xxxx, 231-730-xxxx, 231-731-xxxx, 231-732-xxxx, 231-733-xxxx, 231-734-xxxx, 231-735-xxxx, 231-736-xxxx, 231-737-xxxx, 231-739-xxxx, 231-740-xxxx, 231-741-xxxx, 231-742-xxxx, 231-743-xxxx, 231-744-xxxx, 231-745-xxxx, 231-747-xxxx, 231-750-xxxx, 231-753-xxxx, 231-754-xxxx, 231-755-xxxx, 231-757-xxxx, 231-758-xxxx, 231-759-xxxx, 231-760-xxxx, 231-762-xxxx, 231-764-xxxx, 231-766-xxxx, 231-767-xxxx, 231-768-xxxx, 231-769-xxxx, 231-773-xxxx, 231-774-xxxx, 231-775-xxxx, 231-776-xxxx, 231-777-xxxx, 231-778-xxxx, 231-779-xxxx, 231-780-xxxx, 231-782-xxxx, 231-785-xxxx, 231-788-xxxx, 231-789-xxxx, 231-790-xxxx, 231-791-xxxx, 231-792-xxxx, 231-793-xxxx, 231-794-xxxx, 231-796-xxxx, 231-797-xxxx, 231-798-xxxx, 231-799-xxxx, 231-803-xxxx, 231-805-xxxx, 231-806-xxxx, 231-808-xxxx, 231-813-xxxx, 231-818-xxxx, 231-821-xxxx, 231-822-xxxx, 231-823-xxxx, 231-824-xxxx, 231-825-xxxx, 231-826-xxxx, 231-827-xxxx, 231-828-xxxx, 231-829-xxxx, 231-830-xxxx, 231-832-xxxx, 231-833-xxxx, 231-834-xxxx, 231-835-xxxx, 231-836-xxxx, 231-837-xxxx, 231-838-xxxx, 231-839-xxxx, 231-842-xxxx, 231-843-xxxx, 231-844-xxxx, 231-845-xxxx, 231-846-xxxx, 231-848-xxxx, 231-852-xxxx, 231-853-xxxx, 231-854-xxxx, 231-855-xxxx, 231-856-xxxx, 231-859-xxxx, 231-861-xxxx, 231-862-xxxx, 231-863-xxxx, 231-864-xxxx, 231-865-xxxx, 231-866-xxxx, 231-867-xxxx, 231-869-xxxx, 231-871-xxxx, 231-872-xxxx, 231-873-xxxx, 231-874-xxxx, 231-875-xxxx, 231-876-xxxx, 231-877-xxxx, 231-878-xxxx, 231-879-xxxx, 231-881-xxxx, 231-882-xxxx, 231-883-xxxx, 231-884-xxxx, 231-885-xxxx, 231-886-xxxx, 231-887-xxxx, 231-889-xxxx, 231-890-xxxx, 231-893-xxxx, 231-894-xxxx, 231-896-xxxx, 231-898-xxxx, 231-899-xxxx, 231-902-xxxx, 231-903-xxxx, 231-907-xxxx, 231-908-xxxx, 231-912-xxxx, 231-916-xxxx, 231-920-xxxx, 231-922-xxxx, 231-923-xxxx, 231-924-xxxx, 231-925-xxxx, 231-926-xxxx, 231-928-xxxx, 231-929-xxxx, 231-930-xxxx, 231-931-xxxx, 231-932-xxxx, 231-933-xxxx, 231-935-xxxx, 231-936-xxxx, 231-937-xxxx, 231-938-xxxx, 231-941-xxxx, 231-942-xxxx, 231-943-xxxx, 231-944-xxxx, 231-946-xxxx, 231-947-xxxx, 231-955-xxxx, 231-962-xxxx, 231-970-xxxx, 231-972-xxxx, 231-974-xxxx, 231-981-xxxx, 231-994-xxxx, 231-995-xxxx
Number of telephone companies37 telephone companies servicing the 231 area code
List of telephone companiesCENTENNIAL MICHIANA LICENSE COMPANY LLC, DOBSON CELLULAR SYSTEMS, INC., USA MOBILITY WIRELESS, INC., TELNET WORLDWIDE, INC., NEXTEL COMMUNICATIONS, INC., CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI, LOCAL EXCHANGE CARRIERS OF MICHIGAN, INC. - MI, NEW CINGULAR WIRELESS PCS, LLC - IL, LEVEL 3 COMMUNICATIONS, LLC - MI, PENINSULA TELEPHONE CO., LUCRE, INC., BROOKS FIBER COMMUNICATIONS OF MICHIGAN - MI, CENTURYTEL OF MICHIGAN, INC., ALLTEL COMMUNICATIONS, INC. - MI, AMERITECH MICHIGAN, CENTURYTEL WIRELESS, INC.-MI, DAYSTARR, LLC DBA DAYSTARR COMMUNICATIONS - MI, CHARTER FIBERLINK - MICHIGAN, LLC - MI, ACD TELECOM, INC. - MI, CENTURY TELEPHONE CO. OF NORTHERN MICHIGAN, VERIZON WIRELESS (VAW), LLC, ACE TELEPHONE CO. OF MICHIGAN, INC., AMERICAN MESSAGING (AM), INC., VERIZON NORTH INC.-MI, SPRINT SPECTRUM L.P.- MI, KALEVA TELEPHONE COMPANY, TCG DETROIT - MI, ISLAND TELEPHONE CO., LONG DISTANCE OF MICHIGAN, INC. DBA LDMI - MI, AT&T LOCAL, KALEVA TELEPHONE COMPANY - MI, PIGEON TELEPHONE CO., CARR TELEPHONE CO., BANDWIDTH.COM CLEC, LLC -MI, UPPER PENINSULA TELEPHONE CO., CENTURYTEL MIDWEST-MIDWEST, INC., CYNERGYCOMM.NET, INC. - MI

231 Area Code Map

 
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