North American Numbers Source-cited · ownership disclosed
Area code
204
In service
Canada · since 1947

Manitoba (Winnipeg)

Area code 204 is the original telephone area code for the entire Canadian province of Manitoba, assigned in 1947. It remains the primary code, sharing its province-wide territory with overlays 431 and 584.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Manitoba (Winnipeg)
Type
geographic
Status
in service
In service since
1947
Projected exhaust
2035 Q3

Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.

A · Where it is

Where 204 is

All of Manitoba, Canada — including Winnipeg, Brandon, Steinbach, Portage la Prairie and Thompson..

Communities served wholly or partly by 204:

WinnipegBrandonSteinbachPortage la PrairieThompsonWinkler

Province-wide code; not tied to any single city.

B · Relationships

How it relates to other codes

The codes 204 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?

Overlay · 2012 431 Manitoba (province-wide overlay) First overlay added over the same all-Manitoba area.
Overlay · 2022 584 Manitoba (province-wide overlay) Second overlay added over the same all-Manitoba area.
What's changing. Base code; overlaid province-wide by 431 (2012) and 584 (2022). Manitoba never split — always a single NPA with overlays added.
C · History

How 204 got here

1947
Assigned as one of the original North American area codes for Canada, covering all of Manitoba.
Source: Wikipedia
2012-11
Overlay 431 introduced province-wide; 10-digit dialing became mandatory July 30, 2012.
Source: Wikipedia
2022-10-29
Second overlay 584 placed into service across Manitoba.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
781
Prefixes available
0

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 204 with another code →
Sources
Wikipedia ↗
Area codes 204, 431, and 584
NumberResearch.org ↗
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).

Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.