204 Area Code — Winnipeg, MB

What is area code 204 and where does it cover?

Area code 204 covers the entire province of Manitoba, Canada, including Winnipeg, Brandon, Steinbach, Thompson, Portage la Prairie, and more. It forms an overlay complex with 431 and 584 across the same geography, so new numbers may use any of these codes.

How did area code 204 evolve over time?

• 1947: 204 assigned as one of Canada’s original nine area codes.

• 2010–2012: Relief approved and implemented via provincewide overlay 431 (in service November 2012) to avoid splitting rural/urban regions.

• 2022: CRTC approved and introduced overlay 584 (effective October 29, 2022) as the next relief step.

What are the current dialing rules for 204/431/584?

10-digit dialing is mandatory throughout Manitoba for local calls within and across the 204/431/584 overlay complex. (A special case noted cross-border local calling impacts Flin Flon, MB and Creighton, SK.)

Why did Manitoba choose overlays instead of a geographic split?

Canadian regulators and carriers favored overlays to avoid forcing number changes on existing customers—especially in rural areas—and because Canada’s number-allocation system (without number pooling) can speed exhaustion in many small rate centers. Overlays add capacity with minimal disruption.

What interesting facts are tied to 204?

Historic code: 204 has identified Manitoba since the earliest days of direct long-distance dialing.

Provincewide identity: The addition of 431 and 584 created a three-code overlay across the same province—an example of relief planning used across Canada.