Area codes 204, 431, and 584

Area codes 204, 431, and 584 are telephone area codes in the North American Numbering Plan (NANP) for the Canadian province of Manitoba. Area code 204 is one of the nine original North American area codes assigned to Canada in 1947. Area codes 431 and 584 were assigned to the same numbering plan area (NPA) in 2012 and 2022, respectively, forming an overlay complex.

History
When the American Telephone and Telegraph Company (AT&T) designed the first comprehensive North American telephone numbering plan in the 1940s, Manitoba was designated as a single numbering plan area (NPA) with area code 204.

In 2009, the Canadian Numbering Administrator forecast that area code 204 would be exhausted within a few years even though there were only 1.2 million people in the entire province. An area code provides about 7.8 million telephone numbers, but Canada uses an allocation scheme that allots all ten thousand numbers of a central office prefix to competitive local exchange carriers even for the smallest hamlets. Canada does not implement number pooling. Therefore, once a number is allocated to a rate centre, it cannot be reassigned elsewhere even if a rate centre has more than enough numbers to service it. The number exhaustion was caused by the proliferation of cell phones, particularly in and around Winnipeg.

In July 2010, the Canadian Radio-television and Telecommunications Commission approved a province-wide overlay with area code 431 for implementation in November 2012. On July 30, 2012, 10-digit dialing became mandatory throughout the province. Although that had the effect of allocating about 15.6 million numbers to a province of just over 1.2 million people, MTS and other carriers in the province preferred that method to a geographical split, which would have seen one part of the province retain area code 204 and another part receive the new area code 431. The province's telephone companies wanted to spare Manitobans the expense and burden of changing telephone numbers.

Area code 584 was reserved as a third area code for the region in February 2017. It was implemented on October 29, 2022.

The incumbent local exchange carrier for the area codes is Bell MTS.

Service area and central office codes

 * Premium services: 1+(204/431/584) 976
 * Alexander (204) 752 852
 * Alonsa (204) 767
 * Anola (204) 866
 * Arborg (204) 376 494 498
 * Altona (204) 216 217 304 319 324
 * Amaranth (204) 843
 * Austin (204) 637 (431) 300
 * Baldur (204) 535
 * Beausejour (204) 268 (431)218
 * Brandon (204) 321 402 441 455 520 570 571 573 574 578 579 580 581 596 650 717 720 721 724 725 726 727 728 729 730 740 761 901 922 (431) 210 308 432 483 540
 * Bissett (204) 277 (431) 226
 * Boissevain (204) 305 534 552
 * Carberry (204) 703 834 844 (431) 219
 * Carman (204) 497 715 745 750 751 (431) 237
 * Cartwright (204) 529
 * Churchill (204) 675 (431) 232 971
 * Clear Lake (204) 848 (431) 321
 * Crandall 562
 * Cromer (204) 556
 * Cross Lake (204) 676 (431) 230
 * Cypress River (204) 743
 * Darlingford 246
 * Dauphin (204) 547 572 592 621 622 629 630 638 647 648 672 701 (431) 220 401
 * Dugald (204) 419 853 860
 * Deloraine (204) 696 747 (431) 236
 * Easterville (431) 227
 * Edwin (204) 252 839
 * Elgin (204) 769
 * Elie (204) 353
 * Elkhorn (204) 845
 * Ethelbert (204) 742
 * Flin Flon (204) 271 680 681 687 923 991 (431) 217
 * Fisher Branch (204) 372
 * Gillam (204) 652, (431) 285
 * Gimli (204) 642 671 (431) 641
 * Gladstone (204) 385
 * Glenboro (204) 827
 * Goodlands (204) 658
 * Grand Beach (431) 228
 * Gretna (204) 327
 * Hamiota (204) 764 (431) 235
 * Hartney (204) 616 858
 * Holland (204) 526 (431) 225
 * Kenton (204) 838
 * Killarney (204) 523 600 (431) 234
 * Lac du Bonnet (204) 213 340 345 350 459
 * Letellier (204) 737
 * Lockport (204) 757
 * Lorette (204) 270 878 961
 * Lyleton (204) 649
 * MacGregor (204) 685
 * Manitou (204) 242 (431) 284
 * McAuley (204) 722
 * Medora and Napinka (204) 665
 * Melita (204) 264 522 551 576 591
 * Miami (204) 435
 * Miniota (204) 567
 * Minnedosa (204) 210 705 867 868 907
 * Minto (204) 776
 * Morden (204) 501 812 822 823 (431) 216 486 487 775
 * Morris (204) 209 561 712 714 746 921
 * Neepawa (204) 212 463 476 704 841 916 (431) 221
 * Ninette (204) 528
 * Niverville (204) 388 503 530 540 542 544
 * Norway House (204) 301 359
 * Notre-Dame-de-Lourdes (204) 248
 * Oakbank (204) 403 443 444 446 506 541 606 816 817 818 819 900 902
 * Oakville (204) 267 964
 * Oak Lake (204) 855
 * Oxford House (431) 231
 * Pierson (204) 634
 * Pilot Mound (204) 208 245 825
 * Pinawa (204) 753
 * Pine Falls (204) 317 367 830
 * Pipestone (204) 854
 * Plumas (204) 386
 * Portage la Prairie (204) 239 240 249 309 400 515 521 595 692 814 850 856 857 870 871 872 892 903 (431) 251 400
 * Reston (204) 577 662 877
 * Rivers (204) 303 328 398 412 710
 * Riverton (204) 378 (431) 283
 * Roblin (204) 207 247 465 917 937
 * Roland (204) 343
 * Rossburn (204) 859
 * Russell (204) 773 796 821
 * Sanford (204) 405 418 508 706 736
 * Selkirk (204) 260 406 420 444 481 482 485 492 498 527 549 785 904 909 971 994 (431) 238 484
 * Snowflake (204) 876
 * Souris (204) 413 483 709 741
 * Sperling (204) 626
 * St. Adolphe (204) 883
 * St. Eustache (204) 353
 * St. Francois Xavier (204) 864
 * St-Pierre-Jolys (204) 433
 * Ste. Anne (204) 401 422
 * Ste Rose du Lac (204) 496 613 (431) 233
 * Starbuck (204) 735 (431) 301
 * Steinbach (204) 300 320 321 326 346 355 370 371 380 381 392 408 543 846 905 912 972 993 (431) 205 215
 * Stonewall (204) 404 454 461 464 467 490 507 513 906 (431) 223 302
 * Stony Mountain (204) 344 530
 * Strathclair (204) 365 (431) 282 973
 * Swan Lake (204) 836 974
 * Swan River (204) 236 238 281 518 524 525 539 569 614 733 734 (431) 281
 * Teulon (204) 206 861 886
 * The Pas (204) 617 620 623 627 969 978 (431) 229 239
 * Thompson (204) 307 550 598 670 674 677 679 778 939 970 (431) 224
 * Treherne (204) 608 693 713 723
 * Vidir (204) 364
 * Virden (204) 491 512 707 718 748 851 908 (431) 645
 * Waskada (204) 673
 * Whitemouth (204) 348
 * Winkler (204) 312 325 331 332 361 362 384 493 502 531 542 (431) 240
 * Winnipeg (204) 200 201 202 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 235 237 250 251 253 254 255 256 257 258 259 260 261 262 269 272 275 282 283 284 285 287 289 290 291 292 293 294 295 296 297 298 299 318 330 333 334 336 338 339 360 390 391 396 399 410 414 415 416 417 421 430 451 452 453 470 471 474 475 477 478 479 480 487 488 489 499 500 504 505 509 510 514 515 557 558 560 582 583 586 588 589 590 594 599 612 615 619 631 632 633 654 661 663 666 667 668 669 688 691 694 695 697 698 760 770 771 772 774 775 777 779 780 781 782 783 784 786 787 788 789 790 791 792 793 794 795 797 798 799 800 801 802 803 804 805 806 807 808 809 813 815 831 832 833 837 869 880 881 885 887 888 889 890 891 894 895 896 897 898 899 910 914 915 918 919 920 924 925 926 927 928 929 930 931 932 933 934 935 936 938 940 941 942 943 944 945 946 947 948 949 951 952 953 954 955 956 957 958 959 960 962 963 975 977 979 981 982 983 984 985 986 987 988 989 990 992 995 996 997 998 999 (431) 200 206 222 317 334 335 336 338 420 421 422 423 424 425 426 427 428 429 433 451 485 777 800 802 845 846 847 848 944 990 996 997 998 999
 * Winnipeg Beach (204) 389

Calls to the following communities can be direct-dialed from Winnipeg as a local call: Dugald, Lockport, Lorette, Oakbank, St. Adolphe, St. Francois Xavier, Sanford, Starbuck, Stonewall, and Stony Mountain.