403
Area code
ALBERTA
Canada geographic area code, in service since 1947-01-01. Part of the 368/403/587/825 overlay complex — ten-digit dialing required.
Created 867.
Statusin service
Introduced1947-01-01
JurisdictionALBERTA, CANADA
Local dialing10D
Time zoneMountain
Last verified2026-09-17
Area codes serve rate-center geographies, not municipal boundaries. “ALBERTA” identifies the jurisdiction, not an exact city footprint.
Change history
Recorded events for this NPA- 2021-05-25 NPA 368 to Overlay NPAs 403/587/780/825 (Alberta, Canada) Deferred – supersedes PL-531
- 2015-12-02 NPA 825 to Overlay NPAs 403/587/780 (Alberta Canada)
- 2008-02-27 NPA 587 to Overlay NPA 403 and NPA 780 (Alberta, Canada)
- 1997-03-12 Declaration of Jeopardy Situation in NPA 403 (Alberta) jeopardy
- 1947-01-01Area code 403 entered service.
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2008-02-27 | PL-374 ↗ | NPA 587 to Overlay NPA 403 and NPA 780 (Alberta, Canada) |
| 2007-07-27 | PL-364 ↗ | NPA 587 to Overlay NPAs 403 and 780 (Alberta, Canada) |
| 1999-05-11 | PL-176 ↗ | Urgent reminder to Industry to update networks for the 403 NPA Split in Alberta, Canada with new 780 NPA |
| 1999-01-08 | PL-148 ↗ | Reissue of the 403 NPA Split in Alberta, Canada, to add new Test Numbers, NXX listing, and Permissive Dialing Dates (first issued in PL-084 on September 2, 1998.) |
| 1997-09-02 | PL-084 ↗ | NANP-Split of 403 (Alberta) Numbering Plan Area (NPA) |