North American Numbers Source-cited · ownership disclosed
Area code
506
In service
Canada · since 1955

New Brunswick (Moncton)

Area code 506 serves the entire province of New Brunswick, Canada. It is overlaid by area code 428.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
New Brunswick (Moncton)
Type
geographic
Status
in service
In service since
1955
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 506 is

All of New Brunswick, including Moncton, Saint John, Fredericton, Bathurst, Edmundston and Miramichi..

Communities served wholly or partly by 506:

MonctonSaint JohnFrederictonBathurstEdmundstonMiramichi
B · Relationships

How it relates to other codes

The codes 506 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?

Split from · 1955 902 Nova Scotia & Prince Edward Island (Halifax) 506 split off from 902 in 1955.
Overlay · 2023 428 New Brunswick (overlay) 428 overlays the identical New Brunswick geography served by 506.
What's changing. Overlaid by 428 since April 29, 2023; ten-digit dialing mandatory. 2023 activation — re-check CNA/NANPA.
C · History

How 506 got here

1955
Area code 506 established for New Brunswick (and briefly Newfoundland) in a split from 902.
Source: Wikipedia
2023-04-29
Area code 428 activated as an overlay of 506; ten-digit dialing became mandatory.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
678
Prefixes available
0

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

Compare 506 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.