New Brunswick area codes
New Brunswick uses 2 area codes. The oldest is 506, in service since 1955; the newest is 428, from 2023. Across them 700 of 1,600 possible number blocks are allocated, 43.8% of capacity. No single national carrier dominates: in 1 of them the largest share of blocks sits with smaller CLEC and VoIP providers taken together. In the 33 days to 30 October 2026, FTC complaints named a New Brunswick caller ID 620 times – 0.3% of all complaints in the window, most often 506 with 328 (288th of 422 nationally). The CNA records 104 exchange areas across the province's codes. Canadian number blocks are administered by the CNA rather than NANPA, so block counts come from a separate file with a different maximum per code (800, not 786).
All 2 codes
| Code | In service | Blocks used | Largest holder | Complaints | Shares area with |
|---|---|---|---|---|---|
| 428 | 2023 | 22/800 | – | 292 | 506 |
| 506 | 1955 | 678/800 | Other CLEC / VoIP 36.4% | 328 | 428 |
Block share is share of allocated number blocks, not of subscribers. Complaint counts cover 28 Sep – 30 Oct 2026 and reflect spoofed caller IDs as much as real calls. Canadian blocks are administered by the CNA; the maximum per code is 800 rather than 786.
How full New Brunswick’s codes are
A code holds at most 800 blocks of 10,000 numbers each. When a code fills up, the administrator does not reclaim numbers – it adds an overlay, and from then on new numbers in the same area come from the new code.
Most room left
Who holds the number blocks
Counted as the number of the province’s codes in which each holder has the largest share. Block-level totals are not available for Canadian codes, so we do not add per-code percentages into a province-wide figure – that would be an estimate dressed up as a measurement.
| Holder | Largest in | Appears in |
|---|---|---|
| Other CLEC / VoIP | 1 code | 1 code |
“Other CLEC / VoIP” is not one company: it is every holder outside the national carriers counted together, which is what resellers and app-based numbers look like in the records. This is allocation, not subscribers.
Spam complaints naming New Brunswick codes
FTC Do Not Call complaints where the caller ID shown was a New Brunswick number, 28 Sep – 30 Oct 2026 (33 days). Caller IDs on spam calls are routinely faked, so these are complaints about the code, not calls proven to come from it.
How New Brunswick got its codes
1 in the 1950s, 1 in the 2020s. Each code after the first was split off from or overlaid on one already in service.
- 1955 506 goes into service.
- 2023 428 goes into service, split from or overlaid on 506.
Time zones
New Brunswick is in Atlantic time.
Cities and exchanges in New Brunswick
The Canadian Numbering Administrator records which codes serve each exchange area by name.
Frequently asked about New Brunswick area codes
How many area codes does New Brunswick have?
2 in service. They are 428 and 506.
What is the oldest area code in New Brunswick?
506, in service since 1955. Every later code in the province was split off from or overlaid on an existing one.
What is the newest area code in New Brunswick?
428, from 2023, overlaying 506.
What time zone is New Brunswick in?
Atlantic time.
Which New Brunswick area code gets the most spam complaints?
506 – 328 FTC complaints in the 33 days to 30 October 2026, 288th of 422 codes nationally. Those are complaints about the caller ID shown, and spam callers routinely fake a local-looking number, so this says the code is imitated often, not that the calls come from there.
Which carrier holds the most New Brunswick numbers?
No one carrier does. In 1 of the province's 2 codes the largest share of number blocks is held not by a national carrier but by smaller CLEC and VoIP providers counted together – which is what resellers and app-based numbers look like in the records. This is allocation of blocks by the numbering administrator, not a count of subscribers – people keep their numbers when they switch carriers.
Do you have to dial 10 digits in New Brunswick?
Yes. Every code in the province is in an overlay or ten-digit dialing area, so a local call needs the area code too. Dialing seven digits reaches a recording, not a wrong number.
Which cities in New Brunswick have their own area code pages?
9 exchange areas are covered, from Moncton, Saint John and Fredericton down to single-exchange towns. The CNA publishes exchange areas by name, so these are real places.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- Canadian Numbering Administrator – CO Code Status, data date 2026-10-31, retrieved Nov 1, 2026
- FTC – Do Not Call Reported Calls Data, 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026
Figures on this page are counted from those files, not copied from other sites. Spotted an error? Request a correction. How we collect and check: methodology.