905
Area code
ONTARIO
Canada geographic area code, in service since 1993-10-04. Part of the 289/365/742/905 overlay complex — ten-digit dialing required.
Split from 416. Created 289. Created 365. Created 742. Overlaid with 289, 365, 742 .
Statusin service
Introduced1993-10-04
JurisdictionONTARIO, CANADA
Local dialing10D
Time zoneEastern
Last verified2026-09-17
Area codes serve rate-center geographies, not municipal boundaries. “ONTARIO” identifies the jurisdiction, not an exact city footprint.
Change history
Recorded events for this NPA- 2000-10-25 NPA 289 To Overlay NPA 905 (Southern Ontario, Canada)
- 1993-10-04Area code 905 entered service (created from 416).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2013-01-24 | PL-448 ↗ | NPA 365 to Overlay NPA 289/905 (Southern Ontario, Canada) |
| 2012-09-27 | PL-440R1 ↗ | NPA 365 to Overlay NPA 289/905 (Southern Ontario, Canada) |
| 2011-05-31 | PL-420 ↗ | NPA 365 to Overlay NPA 289/905 (Southern Ontario, Canada) |
| 2000-10-25 | PL-243 ↗ | NPA 289 To Overlay NPA 905 (Southern Ontario, Canada) |
| 1992-10-01 | IL-92-09-046 ↗ | NANP-SPLIT OF 416 (ONTARIO, CANADA) NUMBERING PLAN AREA (NPA) |