Significant events for area code 819
| Date |
Details |
| October 21, 1997 | Area code 514 was split three ways with 514 remaining in the south, 819 covering the middle. The northwestern area (which had no telephone service at the time) transferred to 418 |
| 1997 | Area codes 403 and 819 were split to create a new area code 867 to cover the Northwest Territories, the Yukon and Nunavet |
| Quebec 819 overlays. |