Significant events for area code 514
| Date |
Details |
| 1947 | One of the two original area codes for Quebec, covering the eastern area |
| 1957 | 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 |
| 1998 | Area code 514 was split with 450 covering mostly outside of Montreal |
| Quebec 514 overlays. |