343 area code
Ottawa-Hull area, Eastern Time.Area code 343 covers Ottawa-Hull, Kingston, Cornwall and 113 more places in Ontario and Quebec, on Eastern Time. 613 and 753 cover the same area.
Right now in Ottawa-Hull
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 343 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 343 has 116. Each one's share is how many 343 numbers start there.
- Ottawa-Hull16%
- Kingston4%
- Cornwall3%
- Belleville3%
- Brockville3%
- Bancroft2%
Also: Kanata-Stittsville, Jockvale, Merrickville, Smiths Falls, Carleton Place, Orleans, Vankleek Hill, Hawkesbury, Alfred, Rockland, Tweed, Pembroke + 98 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 343 number?
Sales calls to homes and cell phones have legal hours, set by Canada's CRTC rules. Hold every 343 number to them, since you can't tell a work line from a personal cell.
What applies to 343Mon 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
343 and 613 and 753
343 went into service on May 17, 2010. 343, 613 and 753 cover the same area, so new numbers can get any of them and neighbors can have different area codes. 343 holds 42% of the area's exchanges; 613 holds the most. Local calls take all 10 digits.
- 1947613 overlay
- 2010343 starts
- 2022753 overlay
Source: NANPA area code database
Calling a list of 343 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.
343 area code FAQ
What area code is 343?
343 is an Ontario and Quebec area code for Ottawa-Hull, Kingston, Cornwall, Belleville and 112 more places.
What time zone is the 343 area code in?
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer).
Is 613 the same as 343?
Same area, different code. 343, 613 and 753 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 343 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 343 area code start?
On May 17, 2010.
Calling 343 numbers? Reach more of them.
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