Area codes 506 and 428

Area codes 506 and 428 are the telephone area codes in the North American Numbering Plan (NANP) for the Canadian province of New Brunswick. Area code 506 was created in 1955 in a split of numbering plan area (NPA) 902. Area code 428 was added to the same numbering plan area in 2023 to form an overlay plan of the area.

History
The Maritimes provinces (New Brunswick, Nova Scotia, Prince Edward Island) were designated as a single numbering plan area (NPA) in 1947, when the American Telephone and Telegraph Company (AT&T) published the results of the design of a new telephone numbering plan for the North American continent, that unified all existing local numbering system into what would later develop into the North American Numbering Plan, with the goal of automating the expanding toll call routing that involved many telephone operators manually relaying calls across the nations. Of the set of eighty-six original North American area codes, Canada received nine, in which the Maritimes were represented by area code 902.

After the addition of Newfoundland in 1949, New Brunswick and Newfoundland were split off from the numbering plan area in 1955 with area code 506. This configuration existed only until 1962, when Newfoundland was assigned area code 709, leaving New Brunswick as a distinct numbering plan area, with area code 506. Since this persists until today without any overlay code, seven-digit dialing will remain possible in these numbering plan areas: 709, 807, and 867 in Canada, through mid-2023.

Area code 506 was expected to face numbering exhaustion in 2020, and was to be overlaid with area code 428, beginning November 21, 2020, with permissive ten-digit dialing to start in May 2020. Later, the projected exhaust date was delayed to April 2023 and the implementation date was postponed to April 23, 2022. However, the projected exhaust date was delayed to December 2023 and the implementation became mandatory on April 29, 2023, at midnight. Since mid-April, recorded messages have passed on to callers dialling the old method.

The incumbent local exchange carrier for area code 506 is Bell Aliant, which was produced from a merger that included NBTel. Since 2005, local telephone service through Eastlink Communications has also been available in the town of Sackville.

Rate centres and central offices

 * Premium numbers: (1-428/506) - 976
 * Albert: (506) - 882
 * Allardville: (506) - 583 725
 * Alma: (506) - 282 887
 * Arcadia: (506) - 488
 * Baie-Sainte-Anne: (506) - 228
 * Baker Brook: (506) - 258 822
 * Balmoral: (506) - 509 826
 * Bathurst: (506) - 226 252 254 255 265 350 416 480 496 498 499 500 513 527 543 544 545 546 547 548 549 655 828 881 984 989
 * Belledune: (506) - 237 507 520 522
 * Blacks Harbour: (506) - 456 816
 * Boiestown: (506) - 369
 * Bouctouche: (506) - 291 341 700 743 744 926 955
 * Browns Flat: (506) - 468 571
 * Campbellton: (506) - 248 329 701 753 759 760 787 789 790 929 987
 * Campobello Island: (506) - 752
 * Cap-Pelé: (506) - 332 577
 * Caraquet: (506) - 201 602 702 720 724 726 727 997
 * Champdoré: (506) - 342 525
 * Chipman: (506) - 339 820
 * Clair: (506) - 401 821 992
 * Cocagne: (506) - 345 576
 * Dalhousie: (506) - 239 508 684 685 686 706
 * Deer Island: (506) - 747
 * Doaktown: (506) - 225 309 361 365 906 924
 * Dorchester: (506) - 213 224 379 966
 * Edmundston: (506) - 200 223 253 254 353 419 501 514 733 735 736 737 739 740 838 880 986 996
 * Florenceville: (506) - 221 245 246 276 278 391 392 595 703 928
 * Fords Mills: (506) - 785
 * Fredericton: (506) - 206 230 238 247 259 260 261 262 267 292 300 415 429 440 442 443 444 447 449 450 451 452 453 454 455 457 458 459 460 461 462 470 471 472 474 476 478 515 516 897 981 998 999
 * Fredericton Junction: (506) - 348 368
 * Fundy-St. Martins: (506) - 833
 * Grand Bay–Westfield: (506) - 217 270 738 757
 * Grand Falls: (506) - 240 426 473 475 477 479 481 582 704 995
 * Grand Manan: (506) - 660 661 662
 * Grande-Anse: (506) - 604 732
 * Hampton: (506) - 832 943
 * Hartland: (506) - 375 596
 * Harvey: (506) - 347 366 370 705
 * Hautes-Terres: (506) - 358 598 603 764
 * Hillsborough: (506) - 203 734
 * Hoyt: (506) - 687
 * Kedgwick: (506) - 283 284 505
 * Keswick Ridge: (506) - 209 363
 * Lakeland Ridges: (506) - 272 279 812 894
 * Lamèque: (506) - 344 599
 * Maces Bay: (506) - 659
 * McAdam: (506) - 590 784
 * Memramcook: (506) - 334 758
 * Minto: (506) - 326 327 817
 * Miramichi: (506) - 210 251 264 352 417 424 502 517 622 623 624 625 626 627 773 778 780 836 983 985 993
 * Miramichi River Valley: (506) - 586 790 843
 * Moncton: (506) - 204 227 229 232 233 268 294 295 314 377 378 380 381 382 383 384 386 387 388 389 414 431 518 588 777 800 801 802 803 804 805 806 807 830 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 866 867 869 870 871 872 874 875 877 878 893 899 961 962 980 988
 * Nackawic-Millville: (506) - 463 575 818
 * Nashwaak: (506) - 367
 * Neguac: (506) - 220 330 776 779 969
 * New Denmark: (506) - 553 825
 * Nouvelle-Arcadie: (506) - 346 775
 * Oromocto: (506) - 208 357 385 422 446
 * Perth-Andover: (506) - 273 274 280 707 819
 * Petit-Rocher: (506) - 430 542 783
 * Richibucto: (506) - 212 338 427 521 523 524 709 920
 * Riverside-Albert: (506) - 882
 * Rothesay: (506) - 216 847 848 849
 * Sackville: (506) - 256 360 364 536 540 710 939 940
 * Saint-Basile: (506) - 263 580
 * Saint-Léonard: (506) - 390 421 423 824
 * Saint-Louis-de-Kent: (506) - 335 876
 * Saint-Quentin: (506) - 234 235 241 400 504
 * Sainte-Anne-de-Madawaska: (506) - 445 823
 * Saint John: (506) - 202 214 266 285 288 298 333 343 349 420 519 557 558 565 566 592 607 608 609 631 632 633 634 635 636 637 638 639 640 642 643 644 645 646 647 648 649 650 651 652 653 654 657 658 659 663 672 674 692 693 694 696 717 719 721 798 799 844 845 846 886 898 948 977 978 982
 * Salisbury: (506) - 215 372
 * Shediac: (506) - 236 312 351 530 531 532 533 712 922
 * Shippagan: (506) - 218 242 336 337 340 601 715 925
 * Springfield, Kings County: (506) - 485
 * St. Andrews: (506) - 529 814
 * St. George: (506) - 222 396 713 754 755 815 923
 * St. Stephen: (506) - 249 321 465 466 467 469 573 714 813 921 927
 * Strait Shores: (506) - 205 538
 * Summerville (Kingston Peninsula): (506) - 763
 * Sussex: (506) - 432 433 434 435 512 567 808 944 979 994
 * Three Rivers: (506) - 331 534 708 750 751 756
 * Tobique Valley: (506) - 219 355 356 359 968
 * Tracadie: (506) - 250 393 394 395 397 399 600 716 888
 * Valley Waters: (506) - 570 839
 * Welsford: (506) - 486
 * Woodstock: (506) - 243 277 323 324 325 328 425 503 594 612 991
 * Youngs Cove: (506) - 362