Area code 742

742 is a newer area code, in service since October 16, 2021, added on top of 289, 365 and 905. See all new area codes.

Look up a 742 number

Cities and towns in area code 742

742 is an overlay, so it covers the same places as 289, 365 and 905. Places are listed by how many phone prefixes they have in the area.

• Mississauga, ON
• Hamilton, ON
• Brampton, ON
• Oakville, ON
• Oshawa, ON
• St. Catharines, ON
• Markham, ON
• Burlington, ON
• Newmarket, ON
• Niagara Falls, ON
• Richmond Hill, ON
• Ajax, ON
• Woodbridge, ON
• Aurora, ON
• Milton, ON
• Pickering, ON
• Concord, ON
• Welland, ON
• Whitby, ON
• Cobourg, ON
• Georgetown, ON
• Maple, ON
• Stoney Creek, ON
• Thornhill, ON
• Ancaster, ON
• Bolton, ON
• Bowmanville, ON
• Bradford, ON
• Castlemore, ON
• Dundas, ON
• Dunnville, ON
• Fort Erie, ON
• Grimsby, ON
• Keswick, ON
• Port Colborne, ON
• Port Perry, ON
• Uxbridge, ON
• Waterdown, ON
• Whitchurch-Stouffville, ON
• Beamsville, ON
• Beeton, ON
• Bethesda, ON
• Binbrook, ON
• Brooklin, ON
• Caledonia, ON
• Campbellville, ON
• Cayuga, ON
• Claremont, ON
• Colborne, ON
• Freelton, ON
• Hagersville, ON
• Hampton, ON
• King City, ON
• Kleinburg, ON
• Mount Albert, ON
• Mount Hope, ON
• Newcastle, ON
• Niagara-on-the-Lake, ON
• Nobleton, ON
• Orono, ON
• Port Hope, ON
• Queensville, ON
• Ridgeway, ON
• Schomberg, ON
• Smithville, ON
• Stevensville, ON
• Sutton West, ON
• Thorold, ON
• Tottenham, ON
• Vineland, ON
• Wainfleet, ON

Area codes that overlay 742

• 289
• 365
• 905

Questions

Where is area code 742?

Area code 742 is in Ontario. It serves Mississauga, Hamilton, Brampton, Oakville and Oshawa and 66 other cities and towns.

What time zone is area code 742 in?

Area code 742 uses Eastern Time.

What area codes overlay 742?

289, 365 and 905 serve the same area as 742. New numbers in the area can get any of these codes, which is why local calls need all 10 digits.

Is a call from area code 742 a scam?

The area code alone doesn’t tell you. Most calls from 742 are ordinary local calls, but scammers can fake (“spoof”) any number. If you don’t recognize a 742 number, let it go to voicemail.

When did area code 742 start?

742 went into service in 2021. It was created from area code 905.

Can a 742 number be outside Ontario?

Yes. People keep their numbers when they move and when they switch to mobile or internet phone services, so a 742 caller can be anywhere.

Other area codes in Ontario