Area code 428 — New Brunswick
All of New Brunswick (overlay of 506). Overlay assignment, in service since 2024.
At a glance
- Country
- Canada
- Province / territory
- New Brunswick
- Service area
- All of New Brunswick (overlay of 506)
- Time zone
- Atlantic Time (AST/ADT, UTC-4/-3) · current offset -03:00
- Type
- Overlay
- In service since
- 2024
- Country code
- +1 (NANP)
Map
Cities served by 428
Related & overlay area codes
Area code 428 shares geography with one other code serving the same region. A call placed inside this overlay must dial all 10 digits regardless of which code your own line uses.
Carriers operating in 428
The following national and regional telecommunications carriers hold central office (CO) code assignments within numbering plan area 428. Number portability means a phone number originally issued by one carrier may now ride on another carrier's network.
About area code 428
Area code 428 is a Canadian numbering plan area covering All of New Brunswick (overlay of 506). It was placed into service in 2024 as a overlay code, and today operates under the Atlantic Time (AST/ADT, UTC-4/-3) time zone.
Numbers in the 428 NPA are issued in central office (CO) blocks of 10,000 to local exchange carriers, who then assign them to subscribers. Because Canada uses a competitive carrier model under CRTC oversight, multiple carriers — both incumbent and competitive — hold blocks within 428. The current carrier of record for any specific number can be looked up via the Canadian Local Number Portability Consortium, but the originally issued carrier is no longer a reliable signal of who actually serves that line.
If you receive a call from a number beginning with 428, the caller is either physically located in or has historically been associated with All of New Brunswick (overlay of 506). The same applies to overlay codes 506: any of these area codes can correspond to a phone in the same geography, and many households carry numbers from two or three different overlays simultaneously across landlines and mobile devices.
To call a number in 428 from outside Canada and the United States, dial your country's international access prefix, then +1 428 followed by the 7-digit local number. Within the NANP, simply dial 1 followed by all 10 digits — or just the 10 digits if you are also located in an overlay region where 7-digit local dialling is no longer permitted.
Frequently asked questions
Where is area code 428?
Area code 428 serves All of New Brunswick (overlay of 506) in New Brunswick, Canada.
What time zone is 428?
Numbers in 428 are in the Atlantic Time (AST/ADT, UTC-4/-3) time zone.
Is 428 a toll-free or mobile-only code?
No. Canadian area codes are geographic — they apply to both landline and mobile numbers in All of New Brunswick (overlay of 506). Toll-free codes in the NANP (800, 833, 844, 855, 866, 877, 888) are a separate category.
Why do I see calls from 428 if I do not know anyone there?
Two reasons. First, mobile portability: someone who moved away from New Brunswick can keep their 428 number anywhere in the world. Second, scam callers frequently spoof Canadian area codes to appear local. If you do not recognise the number, it is generally safe to let it go to voicemail.