289 area code
Hamilton area, Eastern Time.Area code 289 covers Hamilton, Oakville, Oshawa and 84 more places in Ontario, on Eastern Time. 365, 742 and 905 cover the same area.
Right now in Hamilton
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer)
Calling hours: Mon to Fri, 9 AM to 9:30 PM · Sat to Sun, 10 AM to 6 PM (Canada's CRTC rules)
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Where 289 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 289 has 87. Each one's share is how many 289 numbers start there.
- Hamilton9%
- Oakville5%
- Oshawa5%
- St. Catharines-Thorold5%
- Brampton4%
- Ajax-Pickering4%
- Burlington4%
- Newmarket3%
- Richmond Hill3%
- Cooksville2%
- Streetsville2%
- Markham2%
Also: Thornhill, Aurora, Malton, Milton, Dunnville, Niagara Falls, Woodbridge, Ancaster, Maple, Clarkson, Georgetown, Unionville + 63 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 289 number?
Sales calls to homes and cell phones have legal hours, set by Canada's CRTC rules. Hold every 289 number to them, since you can't tell a work line from a personal cell.
What applies to 289Mon to Fri, 9 AM to 9:30 PM · Sat to Sun, 10 AM to 6 PM
- Canada (CRTC)Mon to Fri, 9 AM to 9:30 PM · Sat to Sun, 10 AM to 6 PMApplies to calls to businesses too. Some provinces add rules the tool doesn't apply, like British Columbia's ban on calls on statutory holidays.CRTC Unsolicited Telecommunications Rules, Part III, s. 23 (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
289 and 365, 742 and 905
289 went into service on June 9, 2001. 289, 365, 742 and 905 cover the same area, so new numbers can get any of them and neighbors can have different area codes. 289 holds 32% of the area's exchanges, the most of any code here. Local calls take all 10 digits.
- 1993905 overlay
- 2001289 starts
- 2013365 overlay
- 2021742 overlay
Source: NANPA area code database
Calling a list of 289 numbers?
Paste it into the free phone number validator. It checks every number, finds each one's time zone and sorts the list by who you can call right now.
289 area code FAQ
What area code is 289?
289 is an Ontario area code for Hamilton, Oakville, Oshawa, St. Catharines-Thorold and 83 more places.
What time zone is the 289 area code in?
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer).
Is 365 the same as 289?
Same area, different code. 289, 365, 742 and 905 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 289 numbers?
Mon to Fri, 9 AM to 9:30 PM · Sat to Sun, 10 AM to 6 PM, local time, under Canada's CRTC rules.
When did the 289 area code start?
On June 9, 2001.
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