Area code 403 was one of nine Canadian area codes of the original North American area codes assigned by the American Telephone and Telegraph Company (AT&T) in 1947. Its numbering plan area (NPA) originally comprised the entire province of Alberta. During the course of the expansion of telephone service in the Canadian territories, these were serviced primarily with the same area code until the territories received area code 867 on October 21, 1997.[1]
Within only a year, area code 403 was threatened by exhaustion because of the rapid growth of telecommunication services demand for pagers, cellphones, and computer modems, as well as growing competition among providers. On January 25, 1999, the northern two thirds of Alberta, including Edmonton, was split from 403 and assigned the new area code 780. Generally, everything from Red Deer, Lacombe, and Ponoka southward stayed in 403. Permissive dialing of 403 continued across the province until May 18, 1999.
Within a decade, area code 403 was close to exhaustion once again. The projected exhaust date was March 2009.[2] The solution for mitigation was to implement area code 587 as a province-wide overlay for both numbering plan areas of the province.[3][4][5] Optional ten-digit dialing began on June 23, 2008 and became mandatory on September 12, 2008.[6] On September 20, 2008, Telus Mobility began to assign 587 telephone numbers to new customers in Calgary and Edmonton.
On April 9, 2016, all three numbering plan areas of the province were overlaid with an additional area code, 825.[7]
On January 21, 2022, the province was once again overlaid with another area code, 368.[8][9]
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Area code 403 is a telephone area code in the North American Numbering Plan NANP for the Canadian province of Alberta The numbering plan area encompasses the southern third of the province which includes the Calgary area This numbering plan area is also served by area codes 587 825 and 368 which form a complex overlay for all of Alberta Alberta s numbering plan areas and area codes Contents 1 History 2 Local exchange carriers 3 Service area and central office codes 4 See also 5 External links 6 ReferencesHistory editArea code 403 was one of nine Canadian area codes of the original North American area codes assigned by the American Telephone and Telegraph Company AT amp T in 1947 Its numbering plan area NPA originally comprised the entire province of Alberta During the course of the expansion of telephone service in the Canadian territories these were serviced primarily with the same area code until the territories received area code 867 on October 21 1997 1 Within only a year area code 403 was threatened by exhaustion because of the rapid growth of telecommunication services demand for pagers cellphones and computer modems as well as growing competition among providers On January 25 1999 the northern two thirds of Alberta including Edmonton was split from 403 and assigned the new area code 780 Generally everything from Red Deer Lacombe and Ponoka southward stayed in 403 Permissive dialing of 403 continued across the province until May 18 1999 Within a decade area code 403 was close to exhaustion once again The projected exhaust date was March 2009 2 The solution for mitigation was to implement area code 587 as a province wide overlay for both numbering plan areas of the province 3 4 5 Optional ten digit dialing began on June 23 2008 and became mandatory on September 12 2008 6 On September 20 2008 Telus Mobility began to assign 587 telephone numbers to new customers in Calgary and Edmonton On April 9 2016 all three numbering plan areas of the province were overlaid with an additional area code 825 7 On January 21 2022 the province was once again overlaid with another area code 368 8 9 Local exchange carriers editThe incumbent local exchange carrier ILEC in 403 is Telus Prior to 1997 the larger 403 included EdTel Edmonton Telephones now part of Telus and Northwestel as ILECs Before 1990 Telus was known as Alberta Government Telephones and was a provincial government department 10 Service area and central office codes editAcadia Valley 403 972 Acme 403 546 Airdrie 403 316 420 768 912 945 948 960 980 Alix 403 747 Arrowwood 403 534 Banff 403 431 497 760 762 763 778 951 985 996 Barons 403 757 Beiseker 403 947 Big Valley 403 876 Blackfalds 403 600 885 Bragg Creek 403 949 Brocket 403 965 Brooks 403 362 363 376 409 427 501 633 793 794 925 Burdett 403 833 Calgary 403 200 201 202 203 204 205 206 207 208 209 210 212 213 214 215 216 217 218 219 220 221 225 226 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 303 305 312 313 319 333 338 351 354 355 365 366 367 369 370 371 374 375 383 384 385 386 387 389 390 397 398 399 400 401 402 404 407 408 410 428 437 440 441 444 450 451 452 453 454 455 456 457 461 462 463 464 465 466 467 470 471 472 473 474 475 476 477 478 479 481 483 487 500 503 508 509 510 512 513 514 515 516 517 519 520 521 523 530 531 532 535 536 537 538 539 540 541 542 543 547 554 560 561 567 568 569 570 571 585 589 590 592 604 605 606 607 608 612 613 614 615 616 617 618 619 620 629 630 640 645 648 650 651 656 660 661 662 663 667 668 669 670 671 680 681 685 686 689 690 691 692 693 695 696 697 698 699 700 701 702 703 705 708 710 714 716 717 718 719 720 723 724 726 727 730 731 735 736 744 747 750 764 765 766 767 769 770 771 774 775 776 777 781 796 797 798 799 800 801 802 803 804 805 806 807 808 809 813 815 816 817 818 819 826 827 828 829 830 831 835 836 837 850 852 860 861 862 863 869 870 873 874 875 879 880 888 889 890 891 899 906 909 910 918 919 920 921 922 923 926 927 931 943 944 955 956 966 968 969 970 971 973 974 975 978 984 987 988 990 991 992 993 997 998 999 Canmore 403 493 609 621 675 678 679 688 707 812 953 961 Cardston 403 653 659 Carstairs 403 337 940 Castor 403 882 Cereal 403 326 Champion 403 897 Claresholm 403 468 489 490 625 682 706 Clive 403 784 Coaldale 403 345 405 Cochrane 403 709 840 851 855 907 932 981 Cowley 403 751 Cremona 403 637 Coutts 403 344 Crossfield 403 941 946 Crowsnest Pass 403 372 459 562 563 564 582 583 623 753 Delburne 403 749 Diamond Valley 403 933 Didsbury 403 335 439 518 Donalda 403 883 Drumheller 403 321 334 436 494 820 821 823 856 East Coulee 403 822 Eckville 403 746 Elkwater 403 893 Elnora 403 773 Empress 403 565 Exshaw 403 673 674 Foremost 403 867 Fort Macleod 403 553 Glenwood 403 626 Halkirk 403 884 Hanna 403 857 High River 403 336 422 469 498 601 602 603 649 652 841 908 Hilda 403 838 Hill Spring See Glenwood Hussar 403 787 Innisfail 403 227 Irricana 403 935 Irvine 403 834 Jenner 403 898 Kananaskis Improvement District 403 591 Lacombe 403 782 786 789 Lake Louise 403 434 522 Langdon 403 936 954 Leslieville 403 729 Lethbridge 403 308 315 317 320 327 328 329 330 331 332 353 359 360 380 381 382 388 393 394 524 593 634 635 694 715 795 849 892 894 915 929 942 Lomond 403 792 Longview 403 558 Magrath 403 758 759 Manyberries 403 868 Medicine Hat 403 458 487 488 502 504 525 526 527 528 529 548 580 581 594 712 866 878 905 926 928 952 957 977 979 Milk River 403 647 Milo 403 599 Mirror 403 788 Morley 403 881 Nobleford 403 824 Okotoks 403 306 842 917 938 939 982 995 Olds 403 415 438 507 556 559 586 672 791 994 Penhold 403 886 Picture Butte 403 732 Pincher Creek 403 339 432 484 624 627 632 683 Ponoka 403 704 783 785 790 913 963 Raymond 403 752 Red Deer 403 302 304 307 309 314 318 340 341 342 343 346 347 348 349 350 352 356 357 358 373 391 392 396 406 505 506 550 588 596 597 598 713 754 755 848 872 877 896 967 986 Rimbey 403 843 Rocky Mountain House 403 322 418 429 844 845 846 847 871 895 Rolling Hills 403 964 Schuler 403 839 Seven Persons 403 832 Stettler 403 323 430 740 741 742 743 916 Stirling 403 756 Strathmore 403 324 325 361 480 499 814 901 902 934 962 983 Sunchild O Chiese 403 989 Sundre 403 419 426 636 638 Sylvan Lake 403 858 864 887 Taber 403 223 416 Three Hills 403 443 924 Trochu 403 442 914 Turner Valley 403 933 Vauxhall 403 654 Vulcan 403 485 486 496 Walsh 403 937 Warner 403 642 Waterton Park 403 859 Youngstown 403 779See also editList of NANP area codes List of Alberta area codesExternal links editCNA exchange list for area 1 403 Telecom archives Area Code Map of Canada 1 References edit Status of Numbering Plan Area NPA Codes in World Zone 1 PDF Bellcore NANPA 1993 01 13 Retrieved 2023 05 26 Canadian Numbering Administrator Website Planning Letter PL 364 NPA 587 to Overlay NPAs 403 and 780 Alberta Canada PDF NANPA 2007 07 27 Planning Letter PL 369 NPA 587 to Overlay NPAs 403 and 780 Alberta Canada PDF NANPA 2007 10 15 Planning Letter PL 374 NPA 587 to Overlay NPAs 403 and 780 Alberta Canada PDF NANPA 2008 02 26 Let your fingers do the 10 digit walking CBC News 2008 06 23 Alberta set to dial up new 825 area code CRTC announces Calgary Sun 2013 10 30 Archived from the original on 2015 07 31 Retrieved 2015 07 30 Telecom Decision CRTC 2019 130 CRTC 2019 05 03 Retrieved 2019 05 14 Telecom Decision CRTC 2021 101 CRTC 2021 03 05 Alberta Government Telephones AGT Alberta area codes 403 587 825 368 780 North 780 368 587 825 West 250 778 236 672 403 overlaid with 368 587 and 825 East 306 639 South 406 British Columbia area codes 236 672 778 250 604 Saskatchewan area codes 306 639 Montana area codes 406 50 17 53 N 112 38 20 W 50 298 N 112 639 W 50 298 112 639 Retrieved from https en wikipedia org w index php title Area code 403 amp oldid 1210190871, wikipedia, wiki, book, books, library,
