Telephone Area 231. Page 3.
Prefix: +1231
This prefix is distributed within the state Michigan
The largest city in the region is Muskegon
Time Zone: Eastern
Winter time: UTC-5
Summer time: UTC-4
Below on the map, there is indicated the largest city in the telephone area +1-231-...-.... Michigan Muskegon.
Phone numbers +1-231-YYY-YYYY
| Company | District | Major City | Prefix |
|---|---|---|---|
| Usa Mobility Wireless | Cheboygan | Cheboygan, MI | +1-231607-SSSS |
| Usa Mobility Wireless | Benzie | Frankfort, MI | +1-231608-SSSS |
| Emmet | +1-231610-SSSS | ||
| New Cingular Wireless PCS - IL | Mason | Scottville, MI | +1-231613-SSSS |
| Lucre | Oceana | Shelby, MI | +1-231614-SSSS |
| American Messaging (am) | Cheboygan | Cheboygan, MI | +1-231615-SSSS |
| New Cingular Wireless PCS - IL | Grand Traverse | Traverse City, MI | +1-231620-SSSS |
| Level 3 Communications | Emmet | Petoskey, MI | +1-231622-SSSS |
| Lucre | Cheboygan | Wolverine, MI | +1-231623-SSSS |
| Nextel Communications | Kalkaska | Kalkaska, MI | +1-231624-SSSS |
| Ameritech Michigan | Cheboygan | Cheboygan, MI | +1-231625-SSSS |
| Ameritech Michigan | Cheboygan | Cheboygan, MI | +1-231627-SSSS |
| American Messaging (am) | Manistee | Manistee, MI | +1-231628-SSSS |
| Nextel Communications | Mecosta | Big Rapids, MI | +1-231629-SSSS |
| Cellco Partnership DBA Verizon Wireless | Grand Traverse | Traverse City, MI | +1-231631-SSSS |
| New Cingular Wireless PCS - IL | Grand Traverse | Traverse City, MI | +1-231632-SSSS |
| New Cingular Wireless PCS - IL | Grand Traverse | Traverse City, MI | +1-231633-SSSS |
| Island Telephone Co. | Cheboygan | Cheboygan, MI | +1-231634-SSSS |
| Local Exchange Carriers Of Michigan | Cheboygan | Mackinaw City, MI | +1-231635-SSSS |
| Local Exchange Carriers Of Michigan | Montcalm | Howard City, MI | +1-231636-SSSS |
| Telnet Worldwide | Leelanau | Northport, MI | +1-231637-SSSS |
| Nextel Communications | Muskegon | Muskegon, MI | +1-231638-SSSS |
| Local Exchange Carriers Of Michigan | Benzie | Beulah, MI | +1-231639-SSSS |
| New Cingular Wireless PCS - IL | Benzie | Lake Ann, MI | +1-231640-SSSS |
| Nextel Communications | Grand Traverse | Traverse City, MI | +1-231642-SSSS |
| Local Exchange Carriers Of Michigan | Mecosta | Morley, MI | +1-231643-SSSS |
| Lucre | Manistee | Brethren, MI | +1-231644-SSSS |
| New Cingular Wireless PCS - IL | Grand Traverse | Traverse City, MI | +1-231645-SSSS |
| Frontier North | Antrim | Ellsworth, MI | +1-231646-SSSS |
| Telnet Worldwide | Montcalm | Coral, MI | +1-231647-SSSS |
| Lucre | Montcalm | Howard City, MI | +1-231648-SSSS |
| Cellco Partnership DBA Verizon Wireless | Grand Traverse | Traverse City, MI | +1-231649-SSSS |
| New Cingular Wireless PCS - IL | Benzie | Beulah, MI | +1-231651-SSSS |
| Ameritech Michigan | Newaygo | Newaygo, MI | +1-231652-SSSS |
| Local Exchange Carriers Of Michigan | Kalkaska | Kalkaska, MI | +1-231656-SSSS |
| Local Exchange Carriers Of Michigan | Mecosta | Big Rapids, MI | +1-231660-SSSS |
| Lucre | Lake | Irons, MI | +1-231662-SSSS |
| New Cingular Wireless PCS - IL | Osceola | Marion, MI | +1-231667-SSSS |
| Level 3 Communications | Grand Traverse | Traverse City, MI | +1-231668-SSSS |
| Cellco Partnership DBA Verizon Wireless | Muskegon | Muskegon, MI | +1-231670-SSSS |
| AT&T Local | Muskegon | Muskegon, MI | +1-231672-SSSS |
| Level 3 Communications | Newaygo | Grant, MI | +1-231674-SSSS |
| New Cingular Wireless PCS - IL | Charlevoix | Boyne City, MI | +1-231675-SSSS |
| New Cingular Wireless PCS - IL | Antrim | Bellaire, MI | +1-231676-SSSS |
| Lake | Baldwin, MI | +1-231677-SSSS | |
| Acd Telecom | Manistee | Brethren, MI | +1-231678-SSSS |
| Verizon Wireless (vaw) | Mecosta | Big Rapids, MI | +1-231679-SSSS |
| Level 3 Communications | Osceola | Reed City, MI | +1-231680-SSSS |
| Frontier North | Muskegon | Fruitport, MI | +1-231681-SSSS |
| Telnet Worldwide | Antrim | Alden, MI | +1-231682-SSSS |
| Level 3 Communications | Muskegon | Muskegon, MI | +1-231683-SSSS |
| Local Exchange Carriers Of Michigan | Benzie | Frankfort, MI | +1-231686-SSSS |
| Ameritech Michigan | Newaygo | White Cloud, MI | +1-231689-SSSS |
| Verizon Wireless (vaw) | Mason | Ludington, MI | +1-231690-SSSS |
| Lucre | Cheboygan | Indian River, MI | +1-231693-SSSS |
| Lucre | Benzie | Beulah, MI | +1-231694-SSSS |
| Telnet Worldwide | Montcalm | Howard City, MI | +1-231695-SSSS |
| Lucre | Antrim | Bellaire, MI | +1-231697-SSSS |
| Lucre | Wexford | Harrietta, MI | +1-231698-SSSS |
| Usa Mobility Wireless | Mason | Free Soil, MI | +1-231704-SSSS |
| New Cingular Wireless PCS - IL | Grand Traverse | Traverse City, MI | +1-231709-SSSS |
| American Messaging (am) | Muskegon | Muskegon, MI | +1-231712-SSSS |
| Cellco Partnership DBA Verizon Wireless | Grand Traverse | Traverse City, MI | +1-231714-SSSS |
| New Cingular Wireless PCS - IL | Grand Traverse | Traverse City, MI | +1-231715-SSSS |
| Frontier North | Muskegon | Muskegon, MI | +1-231719-SSSS |
| Frontier North | Muskegon | Muskegon, MI | +1-231720-SSSS |
| Local Exchange Carriers Of Michigan | Oceana | Hart, MI | +1-231721-SSSS |
| Frontier North | Muskegon | Muskegon, MI | +1-231722-SSSS |
| Ameritech Michigan | Manistee | Manistee, MI | +1-231723-SSSS |
| Frontier North | Muskegon | Muskegon, MI | +1-231724-SSSS |
| Frontier North | Muskegon | Muskegon, MI | +1-231725-SSSS |
| Frontier North | Muskegon | Muskegon, MI | +1-231726-SSSS |
| Frontier North | Muskegon | Muskegon, MI | +1-231727-SSSS |
| Frontier North | Muskegon | Muskegon, MI | +1-231728-SSSS |
| New Cingular Wireless PCS - IL | Lake | Irons, MI | +1-231729-SSSS |
| New Cingular Wireless PCS - IL | Muskegon | Muskegon, MI | +1-231730-SSSS |
| Lucre | Oceana | Shelby, MI | +1-231731-SSSS |
| Lucre | Mecosta | Morley, MI | +1-231732-SSSS |
| Frontier North | Muskegon | Muskegon, MI | +1-231733-SSSS |
| Ameritech Michigan | Osceola | Evart, MI | +1-231734-SSSS |
