Area code 742 is in Ontario (ON), Canada and some of the main locations it covers are Mississauga, Oshawa, St Catharines, etc. (jump to city list below).
In service since October 16, 2021, area code 742 is an overlay Numbering Plan Area, part of overlay complex 905/289/365/742 (overlaying NPAs cover the same area).
The current time for places served by area code 742 is 06:55:30 PM (Eastern Time Zone).
| NPANXX | Area served1 |
|---|---|
| 742-200 | Richmond Hill |
| 742-201 | Blackstock |
| 742-202 | Bowmanville |
| 742-203 | Brooklin |
| 742-204 | Hampton |
| 742-205 | Newcastle |
| 742-206 | Port Perry |
| 742-210 | Oak Ridges |
| 742-212 | St. Catharines-Thorold |
| 742-213 | St. Catharines-Thorold |
| 742-222 | Brampton |
| 742-234 | Milton |
| 742-239 | Brampton |
| 742-240 | Caledon East |
| 742-241 | Snelgrove |
| 742-242 | Castlemore |
| 742-243 | Malton |
| 742-244 | Streetsville |
| 742-245 | Cooksville |
| 742-246 | Clarkson |
| 742-248 | Victoria |
| 742-250 | Georgetown |
| 742-251 | Milton |
| 742-252 | Oakville |
| 742-253 | Waterdown |
| 742-277 | Port Credit |
| 742-300 | Streetsville |
| 742-301 | Caledon East |
| 742-302 | Castlemore |
| 742-303 | Clarkson |
| 742-333 | Oshawa |
| 742-368 | Aurora |
| 742-369 | Bethesda |
| 742-370 | Bolton |
| 742-371 | Claremont |
| 742-372 | Gormley |
| 742-373 | Keswick |
| 742-374 | King City |
| 742-375 | Kleinburg |
| 742-376 | Maple |
| 742-377 | Markham |
| 742-378 | Mount Albert |
| 742-379 | Newmarket |
| 742-380 | Nobleton |
| 742-381 | Oak Ridges |
| 742-382 | Palgrave |
| 742-384 | Queensville |
| 742-385 | Richmond Hill |
| 742-386 | Schomberg |
| 742-387 | Stouffville |
| 742-388 | Sutton |
| 742-389 | Thornhill |
| 742-391 | Unionville |
| 742-392 | Uxbridge |
| 742-393 | Woodbridge |
| 742-400 | Ajax-Pickering |
| 742-444 | Hamilton |
| 742-500 | Niagara Falls |
| 742-532 | Streetsville |
| 742-583 | Cooksville |
| 742-588 | Brampton |
| 742-600 | Whitby |
| 742-614 | Brampton |
| 742-615 | Brampton |
| 742-616 | Brampton |
| 742-666 | St. Catharines-Thorold |
| 742-700 | Burlington |
| 742-743 | Bradford |
| 742-744 | Tottenham |
| 742-745 | Ajax-Pickering |
| 742-746 | Oshawa |
| 742-747 | South Pickering |
| 742-748 | Whitby |
| 742-777 | Markham |
| 742-788 | Wainfleet |
| 742-800 | Sutton |
| 742-881 | Port Colborne |
| 742-882 | Niagara Falls |
| 742-883 | Welland |
| 742-885 | Georgetown |
| 742-887 | Beeton |
| 742-888 | Pelham |
| 742-889 | Wainfleet |
| 742-890 | Wellandport |
| 742-900 | Unionville |
| 742-901 | Uxbridge |
| 742-987 | Ajax-Pickering |
| 742-988 | Ajax-Pickering |
| 742-989 | Aurora |
| 742-990 | Bethesda |
| 742-991 | Bolton |
| 742-992 | Claremont |
| 742-993 | Gormley |
| 742-994 | Keswick |
| 742-995 | King City |
| 742-996 | Kleinburg |
| 742-997 | Maple |
| 742-998 | Mount Albert |
| 742-999 | Hamilton |
| City1 | Time2 |
|---|---|
| Ajax | E |
| Alberton | E |
| Allanburg | E |
| Alton | E |
| Ancaster | E |
| Ashburn | E |
| Aurora | E |
| Baldwin | E |
| Baltimore | E |
| Beamsville | E |
| Beeton | E |
| Belfountain | E |
| Bewdley | E |
| Binbrook | E |
| Blackstock | E |
| Bolton | E |
| Bond Head | E |
| Bowmanville | E |
| Bradford | E |
| Brampton | E |
| Brougham | E |
| Burlington | E |
| Caesarea | E |
| Caistor Centre | E |
| Caledon | E |
| Caledon East | E |
| Caledon Village | E |
| Caledonia | E |
| Campbellcroft | E |
| Campbellville | E |
| Campden | E |
| Canfield | E |
| Carlisle | E |
| Castleton | E |
| Cayuga | E |
| Cedar Valley | E |
| Cheltenham | E |
| Claremont | E |
| Cobourg | E |
| Colborne | E |
| Concord | E |
| Copetown | E |
| Courtice | E |
| Crystal Beach | E |
| Dundas | E |
| Dunnville | E |
| East Gwillimbury | E |
| Fenwick | E |
| Fisherville | E |
| Fonthill | E |
| Fort Erie | E |
| Freelton | E |
| Georgetown | E |
| Gilford | E |
| Goodwood | E |
| Gores Landing | E |
| Gormley | E |
| Grafton | E |
| Grassie | E |
| Greenbank | E |
| Greenwood | E |
| Grimsby | E |
| Hagersville | E |
| Haldimand County | E |
| Hamilton | E |
| Hampton | E |
| Hannon | E |
| Harwood | E |
| Holland Landing | E |
| Hornby | E |
| Inglewood | E |
| Innisfil | E |
| Jacksons Point | E |
| Jerseyville | E |
| Jordan Station | E |
| Kendal | E |
| Keswick | E |
| Kettleby | E |
| Kilbride | E |
| King City | E |
| Kleinburg | E |
| Leaskdale | E |
| Limehouse | E |
| Locust Hill | E |
| Loretto | E |
| Lowbanks | E |
| Lynden | E |
| Maple | E |
| Markham | E |
| Millgrove | E |
| Milton | E |
| Mississauga | E |
| Moffat | E |
| Mount Albert | E |
| Mount Hope | E |
| Nestleton Station | E |
| Newcastle | E |
| Newmarket | E |
| Newtonville | E |
| Niagara Falls | E |
| Niagara On The Lake | E |
| Nobleton | E |
| Norval | E |
| Oakville | E |
| Orono | E |
| Oshawa | E |
| Palgrave | E |
| Pickering | E |
| Port Colborne | E |
| Port Hope | E |
| Port Perry | E |
| Port Robinson | E |
| Prince Albert | E |
| Queenston | E |
| Queensville | E |
| Richmond Hill | E |
| Ridgeville | E |
| Ridgeway | E |
| River Drive Park | E |
| Roches Point | E |
| Roseneath | E |
| Sandford | E |
| Schomberg | E |
| Seagrave | E |
| Selkirk | E |
| Sharon | E |
| Sherkston | E |
| Smithville | E |
| St Anns | E |
| St Catharines | E |
| St Davids | E |
| Stevensville | E |
| Stoney Creek | E |
| Stouffville | E |
| Sutton West | E |
| Terra Cotta | E |
| Thornhill | E |
| Thorold | E |
| Tottenham | E |
| Unionville | E |
| Uxbridge | E |
| Vaughan | E |
| Vineland | E |
| Vineland Station | E |
| Virgil | E |
| Wainfleet | E |
| Waterdown | E |
| Welland | E |
| Wellandport | E |
| West Flamborough | E |
| Whitby | E |
| Whitevale | E |
| Willow Beach | E |
| Woodbridge | E |
| Zephyr | E |