Ontario area codes
Every NANP area code assigned to Ontario. Compare overlays, cities, and time zones—then search or buy numbers for this region on PhoneNumbers.com.
19 codes · 19 geographic . Time zone: Eastern Time.
Major Cities in Ontario
Area codes in Ontario
Select a region to see every area code assigned there.
Popular: 205, 251, 256, 334, 483
Popular: 907
Popular: 480, 520, 602, 623, 928
Popular: 327, 479, 501, 870
Popular: 209, 213, 279, 310, 323
Popular: 303, 719, 720, 748, 970
Popular: 203, 475, 860, 959
Popular: 302
Popular: 202, 771
Popular: 239, 305, 321, 324, 352
Popular: 229, 404, 470, 478, 678
Popular: 808
Popular: 208, 986
Popular: 217, 224, 309, 312, 331
Popular: 219, 260, 317, 463, 574
Popular: 319, 515, 563, 641, 712
Popular: 316, 620, 785, 913
Popular: 270, 364, 502, 606, 859
Popular: 225, 318, 337, 457, 504
Popular: 207
Popular: 227, 240, 301, 410, 443
Popular: 339, 351, 413, 508, 617
Popular: 231, 248, 269, 313, 517
Popular: 218, 320, 507, 612, 651
Popular: 228, 471, 601, 662, 769
Popular: 235, 314, 417, 557, 573
Popular: 406
Popular: 308, 402, 531
Popular: 702, 725, 775
Popular: 603
Popular: 201, 551, 609, 640, 732
Popular: 505, 575
Popular: 212, 315, 329, 332, 347
Popular: 252, 336, 472, 704, 743
Popular: 701
Popular: 216, 220, 234, 283, 326
Popular: 405, 539, 572, 580, 918
Popular: 458, 503, 541, 971
Popular: 215, 223, 267, 272, 412
Popular: 401
Popular: 803, 821, 839, 843, 854
Popular: 605
Popular: 423, 615, 629, 729, 731
Popular: 210, 214, 254, 281, 325
Popular: 385, 435, 801
Popular: 802
Popular: 276, 434, 540, 571, 686
Popular: 206, 253, 360, 425, 509
Popular: 304, 681
Popular: 262, 274, 353, 414, 534
Popular: 307
Popular: 368, 403, 587, 780, 825
Popular: 236, 250, 257, 604, 672
Popular: 204, 431, 584
Popular: 428, 506
Popular: 709, 879
Popular: 867
Popular: 782, 902
Popular: 867
Popular: 226, 249, 289, 343, 365
Popular: 782, 902
Popular: 263, 354, 367, 418, 438
Popular: 306, 474, 639
Popular: 867
Toll-free NANP code reachable across participating countries and territories.
View detailsToll-free NANP code reachable across participating countries and territories.
View detailsToll-free NANP code reachable across participating countries and territories.
View detailsToll-free NANP code reachable across participating countries and territories.
View detailsToll-free NANP code reachable across participating countries and territories.
View detailsToll-free NANP code reachable across participating countries and territories.
View detailsToll-free NANP code reachable across participating countries and territories.
View detailsThe North American Numbering Plan (NANP) covers the United States, Canada, and many Caribbean countries. Area codes route calls to specific geographic regions or to toll-free services. In high-growth regions, overlay area codes are introduced to increase numbering capacity, often requiring 10-digit dialing.
Overlays add a new code to the same region (e.g., 212 overlaid by 332, 646). Splits carve a region into two or more unique codes. Overlays are now more common than splits.
Many regions require 10-digit dialing (area code + local number). Toll-free numbers are dialed the same way and may originate from any NANP country.
Frequently asked questions about Ontario
What area codes serve Ontario?
Browse the area-code grid on this Ontario page for every NANP code in the region, including overlays and major cities.
What does an overlay mean for Ontario?
An overlay adds one or more new area codes to the same geography so existing numbers keep their code while new numbers may get a different one—ten-digit dialing is usually required.
How do I search phone numbers for Ontario?
Use the search box on this page or PhoneNumbers.com search, then filter by area code, city, or state to browse available numbers.