Area code 231 is assigned for use in Michigan since Jun 05, 1999. This area code originated from the 616 area code previously by means of area code split or overlay. View all phone prefixes used in area code 231 or other area codes in Michigan. Included with the location of each prefix are the phone companies / service providers that operates them.
| Area code / prefix | Location | Company / Service Provider |
|---|---|---|
| 231-201 | CHIPPEWALK, MI | NEW CINGULAR WIRELESS PCS, LLC - IL |
| 231-202 | MECOSTA, MI | NEW CINGULAR WIRELESS PCS, LLC - IL |
| 231-203 | ALANSON, MI | NEW CINGULAR WIRELESS PCS, LLC - IL |
| 231-204 | FIFE LAKE, MI | USA MOBILITY WIRELESS, INC. |
| 231-205 | BRUTUS, MI | TELNET WORLDWIDE, INC. |
| 231-206 | MUSKEGON, MI | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC |
| 231-207 | HONOR, MI | TELNET WORLDWIDE, INC. |
| 231-208 | BOYNEFALLS, MI | TELNET WORLDWIDE, INC. |
| 231-209 | SUTTONS BAY, MI | TELNET WORLDWIDE, INC. |
| 231-210 | ST JAMES, MI | ONVOY, LLCV - MI |
| 231-212 | INTERLOCHN, MI | CENTURYLINK COMMUNICATIONS, LLC |
| 231-213 | Traverse City, MI | MICHIGAN BELL TEL CO |
| 231-214 | LE ROY, MI | USA MOBILITY WIRELESS, INC. |
| 231-215 | MUSKEGON, MI | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI |
| 231-216 | FRANKFORT, MI | PEERLESS NETWORK OF MICHIGAN, LLC - MI |
| 231-217 | BEAR LAKE, MI | TELNET WORLDWIDE, INC. |
| 231-218 | Traverse City, MI | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC |
| 231-219 | MERRITT, MI | TELNET WORLDWIDE, INC. |
| 231-220 | MUSKEGON, MI | 123.NET, INC. |
| 231-221 | Harbor Springs, MI | CENTURYLINK COMMUNICATIONS, LLC |
| 231-222 | East Jordan, MI | LEVEL 3 COMMUNICATIONS, LLC - MI |
| 231-223 | OLDMISSION, MI | ACE TEL. CO. OF MICHIGAN, INC. |
| 231-224 | FREMONT, MI | BANDWIDTH.COM CLEC, LLC - MI |
| 231-225 | FREMONT, MI | LEVEL 3 COMMUNICATIONS, LLC - MI |
| 231-226 | GLEN LAKE, MI | TELNET WORLDWIDE, INC. |
| 231-227 | HONOR, MI | CHARTER FIBERLINK - MICHIGAN, LLC - MI |
| 231-228 | GLEN LAKE, MI | CENTURYTEL OF MICHIGAN, INC. DBA CENTURYLINK |
| 231-229 | MOORESTOWN, MI | CENTURYTEL OF MICHIGAN, INC. DBA CENTURYLINK |
| 231-230 | ELMIRA, MI | TELNET WORLDWIDE, INC. |
| 231-232 | MOORESTOWN, MI | TELNET WORLDWIDE, INC. |
| 231-233 | LUDINGTON, MI | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI |
| 231-234 | BUCKLEY, MI | CHARTER FIBERLINK - MICHIGAN, LLC - MI |
| 231-235 | LEVERING, MI | TELNET WORLDWIDE, INC. |
| 231-236 | LAKE CITY, MI | TELNET WORLDWIDE, INC. |
| 231-237 | CHARLEVOIX, MI | MICHIGAN BELL TEL CO |
| 231-238 | INDIAN RIV, MI | MICHIGAN BELL TEL CO |
| 231-239 | LUDINGTON, MI | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI |
| 231-240 | LAKE ANN, MI | TELNET WORLDWIDE, INC. |
| 231-241 | PENTWATER, MI | DAYSTARR, LLC DBA DAYSTARR COMMUNICATIONS - MI |
| 231-242 | Harbor Springs, MI | MICHIGAN BELL TEL CO |
| 231-243 | ALANSON, MI | TELNET WORLDWIDE, INC. |
| 231-244 | BOYNE CITY, MI | CENTURYLINK COMMUNICATIONS, LLC |
| 231-245 | NEWAYGO, MI | NEW CINGULAR WIRELESS PCS, LLC - IL |
| 231-246 | MUSKEGON, MI | COMCAST IP PHONE, LLC |
| 231-247 | WILLIAMSBG, MI | BANDWIDTH.COM CLEC, LLC - MI |
| 231-249 | CHEBOYGAN, MI | BANDWIDTH.COM CLEC, LLC - MI |
| 231-250 | BIG RAPIDS, MI | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI |
| 231-251 | LKLEELANAU, MI | PEERLESS NETWORK OF MICHIGAN, LLC - MI |
| 231-252 | Traverse City, MI | BANDWIDTH.COM CLEC, LLC - MI |
| 231-253 | CADILLAC, MI | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC |
| New numbers being added to 231 area code |
|---|
|
Effective: 04/22/2024 231-453 in HOLTON, MI CHARTER FIBERLINK - MICHIGAN, LLC - MI |
| 231 Area Code Information | ||
|---|---|---|
| Type of code: | General Purpose Code | |
| Location: | MI - US | |
| Time zone: | E | |
| Assigned for use: | Yes | |
| Code in service: | Yes | |
| Service date: | 06/05/99 | |
| In jeopardy: | No | |
| Relief in progress: | No | |
| NPA Relief status: | ||
| Code assignable: | Yes | |
| Geographic or non-geographic: |
G | |
| Reserved for future use: | No | |
| Planning letter(s): | 167 | |
| Overlay code: | No | |
| Overlay complex: | ||
| Dialing plan | Standard | Permissive |
| Home local calls: | 7D | 10D |
| Foreign local calls: | 10D | NA |
| Home toll calls: | 1+10D | NA |
| Foreign toll calls: | 1+10D | - |