343 Area Code
Covers Ottawa and nearby communities in Ontario.
(343) 555-0142Area code 343 map
Interactive coverage map for area code 343, centered on Ottawa, Ontario
45.4112, -75.6981
Open in OpenStreetMapArea code 343 coverage map — centered on Ottawa. Shaded area shows the approximate reach around the primary city.
Calls tagged with area code 343 come from Ottawa and nearby communities in Ontario. It covers communities such as Ottawa, Belleville, Brockville, Carleton Place and more across Ontario. The region observes local time, so a number like (343) 555-0142 is on that clock right now. Neighboring area codes include 819, 873, 450. It shares its territory with the overlay code 613, which sit on the exact same map. Because the 343 region uses more than one area code, you must dial all ten digits — area code included — even for a local call. You do not, however, need to dial a leading 1 for calls within the US and Canada. Keep reading for the current local time in Ottawa, a map of the 343 coverage area, the places it reaches, nearby and overlay codes, and how to tell a real 343 call from a scam.
Cities covered by 343
Cities & neighborhoods
- Ottawa
- Belleville
- Brockville
- Carleton Place
- Clarence-Rockland
- Cornwall
- Gananoque
- Greater Napanee
- Hawkesbury
- Kingston
- Pembroke
- Perth
- Renfrew
- Smiths Falls
Looking for the broader picture? See all Ontario area codes.
Nearby & overlay area codes
Overlay codes (same area)
These share 343’s geography — a number in either code can be on the same street.
Neighboring codes
Codes for adjacent regions and metros.
Is a call from 343 a scam?
Area code 343 serves Ottawa and the surrounding area, so most calls are ordinary local and business traffic. As everywhere, spam and robocalls do use 343 numbers, frequently by spoofing a local-looking caller ID to boost pickup rates. The area code itself tells you nothing about who is really calling, so judge the call by what's said, not the number.
Red flags to watch for
- Pressure to act right now, or threats of arrest, fines, or service being cut off.
- Requests to pay with gift cards, wire transfer, crypto, or a payment app.
- Asking for passwords, one-time codes, your SSN, or full card/bank numbers.
- A robocall or recording, or a number that won’t let you call back.
When unsure, hang up and call the organization back on a number you look up yourself.
Calling a 343 number from abroad
Every 343 number is a US/Canada +1 number. From a mobile anywhere, the simplest approach is to dial it in international format:
+1 343 555-0142If your phone can’t dial the +, replace it with your country’s exit code, then 1, then the number:
- UK, Germany, France & most of Europe
00 1 343 555-0142 - Australia
0011 1 343 555-0142 - Japan
010 1 343 555-0142 - Mexico
00 1 343 555-0142
Within the US and Canada you don’t need any of this — just dial the ten digits 343 555-0142.
Reverse phone lookup
Check any US or Canada number to see whether it's a working line, which carrier it sits on, whether it's mobile, landline or VoIP, and roughly where it's registered.
Shows carrier, line type and location. Owner name isn't available here.
Results are for personal, informational use only and may not be used for employment, credit, housing or tenant-screening decisions.
Area code 343: frequently asked questions
Where is the 343 area code located?
The 343 area code is located in Ontario, centered on Ottawa. Communities in the 343 area include Ottawa, Belleville, Brockville, Carleton Place, Clarence-Rockland, Cornwall.
What time zone is 343 in?
Area code 343 is in the local time zone (UTC-5 (EST) / UTC-4 (EDT)). You can see the exact current local time for Ottawa on the live clock above.
What cities use area code 343?
Cities and areas that use 343 include Ottawa, Belleville, Brockville, Carleton Place, Clarence-Rockland, Cornwall. Its primary city is Ottawa, ON.
Do I need to dial 1 before 343?
For calls within the US, you do not need to dial a leading 1, but you do need all ten digits: 343 plus the seven-digit number. The 343 area requires ten-digit dialing because more than one area code serves it.
Is 343 a toll-free or scam number?
No — 343 is a normal geographic area code for Ottawa, not a toll-free code (toll-free codes are 800, 833, 844, 855, 866, 877 and 888). A 343 number is not inherently a scam, but the code can be spoofed. See the spam-call section above for how to tell.
What are the overlay area codes for 343?
Area code 343 is overlaid by 613, meaning those codes cover the same geographic area.