North American Numbers Source-cited · ownership disclosed
Area code
428
In service
Canada · since 2023

New Brunswick (overlay)

Area code 428 is an overlay covering the same territory as 506 — the entire province of New Brunswick, Canada.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
New Brunswick (overlay)
Type
geographic
Status
in service
In service since
2023
Projected exhaust
2046 Q4

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 428 is

Same as 506: all of New Brunswick..

Communities served wholly or partly by 428:

MonctonSaint JohnFredericton

Overlay code — serves the identical province-wide area as 506.

B · Relationships

How it relates to other codes

The codes 428 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 · 2023 506 New Brunswick (Moncton) 428 overlays the identical New Brunswick geography served by 506.
What's changing. Overlay of 506 (not a split); both serve all of New Brunswick. 2023 activation — re-check CNA/NANPA.
C · History

How 428 got here

2023-04-29
Area code 428 activated as an overlay of 506 (New Brunswick); ten-digit dialing became mandatory.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
22
Prefixes available
0

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

Compare 428 with another code →
Sources
Wikipedia ↗
Area codes 506 and 428
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.