905 area code
Hamilton area, Eastern Time.Area code 905 covers Hamilton, Oshawa, St. Catharines-Thorold and 91 more places in Ontario, on Eastern Time. 289, 365 and 742 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 905 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 905 has 94. Each one's share is how many 905 numbers start there.
- Hamilton12%
- Oshawa6%
- St. Catharines-Thorold6%
- Brampton6%
- Cooksville6%
- Oakville4%
- Streetsville4%
- Thornhill4%
- Unionville4%
- Malton3%
- Burlington3%
- Ajax-Pickering3%
Also: Newmarket, Milton, Aurora, Richmond Hill, Markham, Niagara Falls, Woodbridge, South Pickering, Clarkson, Cobourg, Welland, Whitby + 70 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 905 number?
Sales calls to homes and cell phones have legal hours, set by Canada's CRTC rules. Hold every 905 number to them, since you can't tell a work line from a personal cell.
What applies to 905Mon 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
905 and 289, 365 and 742
905 went into service on October 4, 1993, split off from 416. 905, 289, 365 and 742 cover the same area, so new numbers can get any of them and neighbors can have different area codes. 905 holds 32% of the area's exchanges, the most of any code here. Local calls take all 10 digits.
- 1993905 starts
- 2001289 overlay
- 2013365 overlay
- 2021742 overlay
Source: NANPA area code database
Calling a list of 905 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.
905 area code FAQ
What area code is 905?
905 is an Ontario area code for Hamilton, Oshawa, St. Catharines-Thorold, Brampton and 90 more places.
What time zone is the 905 area code in?
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer).
Is 289 the same as 905?
Same area, different code. 905, 289, 365 and 742 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 905 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 905 area code start?
On October 4, 1993. It was split from 416.
Calling 905 numbers? Reach more of them.
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