Significant events for area code 218
| Date |
Details |
| 1947 | One of the original two area codes for Minnesota. It covered a substantial area of Minnesota, excluding the southeastern area which was covered by 612 . It now covers the northern half of the state. |
| 1954 | Area codes 218 (northern area) and 612 (southeastern area) were rearranged and split with 218 covering the northern area of Minnesota and creating area code 507 , covering the southern area of Minnesota. |