Significant events for area code 612
| Date |
Details |
| 1947 | One of the original two area codes for Minnesota, covering the southeastern area of the state with 218 covering the rest. |
| 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. |
| 1996 | Area code 612 was split with 320 covering outside of the Twin Cities area. |
| 1998 | Area code 612 was split with 651 covering the St. Paul area with Minneapolis staying with 612. |
| 2000 | Three-way split of 612 with 763 covering the northwestern suburbs and 952 covering the southwestern suburbs of Minneapolis. |