Where is area code 289?
NANPA assigns 289 to Ontario. The source report does not provide city-level coverage for this record, so this page does not guess a particular city. Browse other codes in Ontario
Verified area-code information
289 Area Code
289 is an in-service Canada area code assigned to Ontario. It identifies a numbering region, not a caller’s current location.
Official Numbering RegionVerified NANPA Assignment
OntarioArea Code 289
Country: Canada•Time Zone: Eastern•Overlays: 365, 742, 905•In Service: 09-Jun-2001
- Numbering country
- Canada
- Area-code type
- Geographic
- Numbering region
- Ontario
- Time-zone information
- Eastern
- In service since
- 09-Jun-2001
View the official area-code maps ↗. Maps show numbering areas, not a caller’s location.
Time zones associated with 289
NANPA lists Eastern for this numbering area. These are numbering-region time zones, not a caller’s current location.
Eastern time
An area code can span more than one time zone. Local daylight-saving rules may differ.
What area codes overlay 289?
The NANPA source lists 365, 742, 905 in the same overlay complex. An overlay can serve the same broad numbering area; individual numbers still do not prove where a person is.
How do you dial a 289 number?
Use the North American country calling code +1 followed by the three-digit area code and seven-digit local number. For example, write the pattern as +1 289 XXX XXXX. Local dialing rules and charges depend on your location and provider. Check a supported dialing format or check NANPA’s 10-digit dialing list.
Canadian prefixes in 289
The Canadian Numbering Administrator listed 772 in-service prefixes for this area code on 2026-09-28. These are exchange-area and company assignments, not active-number or current-carrier records.
Exchange areas with the most listed prefixes
| Exchange area | In-service prefixes |
|---|---|
| Hamilton | 71 |
| Oakville | 39 |
| Oshawa | 36 |
| St. Catharines-Thorold | 35 |
| Brampton | 30 |
Companies with the most listed assignments
| Assignment company | In-service prefixes |
|---|---|
| TELUS Integrated Communications | 91 |
| Fibernetics Corporation | 89 |
| Iristel Inc. | 71 |
| Rogers Communications Canada Inc. (Wireless) | 67 |
| InnSysVoice Corp | 64 |
289 Canadian prefix lookup
772 in-service prefixes are listed for this area code. Check a Canadian area code and prefix against CNA assignments. The exchange area and company describe the original code assignment, not where a caller is now.
The public area-code file loads when you search. Your search stays in your browser.
Check a number with area code 289
Enter the full ten-digit number to see its structure and formatting. The check stays in your browser.
Check a 289 number
Enter a 10-digit +1 North American number. We check its structure and area-code record, not the caller’s identity or whether the line is active.
Processed locally in your browser. Nothing you enter is sent to OfficialAreaCode or saved.
Received an unfamiliar call?
The displayed number may be spoofed. Do not rely on an area code as proof of caller identity. If the caller claims to represent a business, end the call and contact that business using a number you found independently.
Common questions about 289
What time zone is area code 289 in?
289 is assigned to Ontario, and the NANPA record associates it with Eastern time. A phone number does not reveal its owner’s current time zone. The clock above uses a representative time zone for the numbering area.
Does 289 mean the caller is in Ontario?
No. An area code is an assignment, and a person can travel, move, use internet calling, or display a spoofed number.
Can this page identify who called?
No. OfficialAreaCode has no live subscriber directory or spam-report database.