| District of Ohio area codes: 740 | |
|---|---|
| Country | United States |
| State/Province | Ohio |
| Major City | Columbus |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 740-424 | Jefferson | Steubenville, OH | Aerial Communications |
| 740-425 | Belmont | Barnesville, OH | Ameritech Ohio |
| 740-426 | Fayette | Jeffersonville, OH | Ameritech Ohio |
| 740-427 | Knox | Gambier, OH | United Tel. Co. Of Ohio - Centurylink |
| 740-428 | Gallia | Cheshire, OH | Teleport Communications America |
| 740-429 | Washington | Beverly, OH | Level 3 Communications |
| 740-430 | Fayette | Bloomingburg, OH | Long Distance Of Michigan DBA Ldmi |
| 740-431 | Coshocton | Conesville, OH | Level 3 Communications |
| 740-432 | Guernsey | Cambridge, OH | Frontier North |
| 740-433 | Harrison | Cadiz, OH | Level 3 Communications |
| 740-434 | Washington | Marietta, OH | First Communications LLC DBA Corecomm |
| 740-435 | Guernsey | Cambridge, OH | Frontier North |
| 740-436 | Union | Richwood, OH | Level 3 Communications |
| 740-437 | Fayette | Bloomingburg, OH | Ameritech Ohio |
| 740-438 | Fairfield | Lancaster, OH | Cellco Partnership DBA Verizon Wireless |
| 740-439 | Guernsey | Cambridge, OH | Frontier North |
| 740-440 | Washington | Little Hocking, OH | Cellco Partnership DBA Verizon Wireless |
| 740-441 | Gallia | Gallipolis, OH | Ameritech Ohio |
| 740-442 | Lawrence | Ironton, OH | Cellco Partnership DBA Verizon Wireless |
| 740-443 | Pike | Piketon, OH | Level 3 Communications |
There are 737 prefixes, In the code area, the major cities are Athens, OH;Chillicothe, OH;Delaware, OH;Lancaster,. The major city is Columbus.