365 area code
Markham area, Eastern Time.Area code 365 covers Markham, Hamilton, Brampton and 85 more places in Ontario, on Eastern Time. 289, 742 and 905 cover the same area.
Right now in Markham
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)
Calling a lot of them? RegieGO dials up to five lines at once. See the dialer
Where 365 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 365 has 88. Each one's share is how many 365 numbers start there.
- Markham7%
- Hamilton7%
- Brampton4%
- Thornhill3%
- Oshawa3%
- Ajax-Pickering3%
- Aurora3%
- Oakville2%
- St. Catharines-Thorold2%
Also: Newmarket, Burlington, Milton, Dunnville, Streetsville, Richmond Hill, Niagara Falls, Maple, Stoney Creek, Claremont, Snelgrove, Unionville + 67 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 365 number?
Sales calls to homes and cell phones have legal hours, set by Canada's CRTC rules. Hold every 365 number to them, since you can't tell a work line from a personal cell.
What applies to 365Mon 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
365 and 289, 742 and 905
365 went into service on March 25, 2013. 365, 289, 742 and 905 cover the same area, so new numbers can get any of them and neighbors can have different area codes. 365 holds 29% of the area's exchanges; 289 holds the most. Local calls take all 10 digits.
- 1993905 overlay
- 2001289 overlay
- 2013365 starts
- 2021742 overlay
Source: NANPA area code database
Calling a list of 365 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.
365 area code FAQ
What area code is 365?
365 is an Ontario area code for Markham, Hamilton, Brampton, Thornhill and 84 more places.
What time zone is the 365 area code in?
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer).
Is 289 the same as 365?
Same area, different code. 365, 289, 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 365 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 365 area code start?
On March 25, 2013.
Calling 365 numbers? Reach more of them.
RegieGO researches every account and dials up to five lines at once while you talk. 250 free credits, no credit card.