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Map showing the region covered by area codes 617 and 857

Map of current Massachusetts area codes (since May 2001)

Massachusetts area codes October 1947 – July 1988

Area codes 617 and 857 are the North American area codes serving Boston and several surrounding communities in Massachusetts—such as Brookline, Cambridge, Newton and Quincy (LATA code 128).

The main area code, 617, was one of the original area codes from October 1947, and originally covered the eastern two-thirds of Massachusetts, from roughly the western end of Worcester County to Cape Cod and the South Coast.

In July 1988, most of the western and southern portions of the old 617 territory, including Worcester, the South Coast and the Cape and Islands was split off as area code 508. It was split again in 1997, when most of Boston's outer suburbs split off as 781, which almost completely surrounds 617. This reduced 617 to Boston itself and its closer-in suburbs—an area largely coextensive with the inner ring of Greater Boston.

This was intended as a long-term solution, but within three years 617 was close to exhaustion once again due to the demand for more phone lines for auxiliary devices (mobile phones, fax machines, pagers, and BBS lines). The supply of numbers was further limited because the entire eastern half of Massachusetts is still a single LATA, and several numbers in 508 and 781 were not available for use. On May 2, 2001, 857 was overlaid onto 617. Since then, 10 digit local dialing is mandatory.

Some mobile phone numbers from the 1990s assigned to communities in the area surrounding 617 (now the 781 area code) kept the 617 area code just on those mobile lines after it split.

Splits from area code 617

• 
  508: Split on July 16, 1988 & finished January 1, 1989 (978 split from 508 on September 1, 1997)


• 
  781: Split on September 1, 1997 & finished February 1, 1998

Communities

• Belmont


• Boston


• Brookline


• Cambridge


• Chelsea


• Everett


• Milton


• Newton


• Quincy


• Somerville


• Watertown


• Winthrop

Counties

Portions of the following counties are covered:

• Middlesex


• Norfolk


• Suffolk

Central office codes (by location)

(617)-NXX

• 
  Belmont: 209, 404, 484, 486, 489, 672, 826, 855, 883, 932, 977, 993


• 
  Boston Central: 204, 205, 210, 212, 217, 222, 223, 224, 226, 227, 228, 235, 236, 239, 246, 247, 248, 255, 259, 261, 262, 263, 266, 267, 275, 279, 283, 289, 292, 293, 295, 303, 304, 305, 306, 309, 310, 312, 314, 316, 320, 330, 331, 338, 341, 342, 343, 345, 346, 348, 350, 351, 352, 353, 356, 357, 358, 366, 367, 368, 369, 371, 372, 373, 375, 377, 378, 385, 391, 392, 399, 406, 407, 412, 413, 414, 416, 421, 422, 423, 424, 425, 426, 428, 429, 434, 437, 438, 439, 443, 447, 448, 449, 450, 451, 456, 457, 459, 470, 476, 478, 480, 482, 488, 490, 502, 504, 507, 510, 512, 513, 515, 517, 519, 521, 523, 526, 530, 531, 532, 534, 535, 536, 542, 543, 549, 556, 557, 563, 565, 570, 571, 572, 573, 574, 578, 579, 585, 587, 589, 590, 592, 593, 594, 595, 598, 603, 619, 620, 624, 626, 635, 636, 637, 638, 643, 645, 646, 648, 650, 654, 662, 664, 670, 671, 672, 680, 683, 686, 692, 694, 695, 697, 699, 717, 719, 720, 721, 722, 723, 724, 725, 726, 727, 728, 733, 737, 742, 743, 747, 748, 753, 755, 756, 757, 760, 763, 772, 777, 778, 780, 784, 785, 788, 790, 794, 799, 816, 818, 820, 823, 824, 828, 830, 832, 834, 835, 838, 839, 840, 848, 849, 850, 851, 854, 856, 859, 861, 865, 867, 869, 872, 875, 877, 878, 880, 888, 892, 894, 896, 897, 901, 904, 908, 912, 918, 919, 921, 927, 931, 933, 936, 937, 938, 939, 943, 946, 947, 948, 951, 954, 956, 959, 960, 961, 963, 973, 986, 988, 989, 994


• 
  Brighton: 202, 206, 208, 254, 300, 319, 403, 415, 560, 562, 586, 746, 779, 782, 783, 787, 789, 817, 870, 891, 903, 925, 987


• 
  Brookline: 232, 264, 274, 277, 278, 355, 383, 396, 432, 487, 505, 525, 566, 582, 608, 632, 651, 667, 677, 713, 730, 731, 732, 734, 735, 738, 739, 751, 754, 860, 879, 906, 935, 953, 975, 991, 992


• 
  Cambridge: 201, 216, 218, 225, 229, 230, 233, 234, 245, 250, 251, 252, 253, 256, 258, 280, 290, 299, 301, 308, 324, 335, 339, 349, 354, 359, 374, 384, 386, 388, 395, 397, 401, 417, 430, 441, 444, 452, 453, 460, 465, 468, 475, 491, 492, 493, 494, 495, 496, 497, 498, 499, 500, 503, 520, 528, 540, 547, 550, 551, 575, 576, 577, 583, 588, 599, 613, 621, 642, 647, 649, 661, 665, 674, 679, 682, 685, 693, 703, 710, 714, 715, 758, 761, 768, 798, 800, 802, 803, 806, 812, 821, 836, 844, 852, 858, 864, 866, 868, 871, 873, 876, 899, 902, 909, 914, 940, 945, 949, 955, 976, 995, 998, 999


• 
  Charlestown: 241, 242, 286, 337, 380, 398, 580, 669, 681, 712, 886, 952, 982


• 
  Chelsea: 270, 336, 370, 409, 461, 466, 660, 819, 884, 887, 889, 958


• 
  Dorchester: 265, 282, 287, 288, 297, 326, 379, 436, 446, 474, 506, 514, 533, 704, 707, 740, 822, 825, 905, 929, 979


• 
  East Boston: 271, 418, 455, 561, 567, 568, 569, 634, 716, 874, 895, 913, 970, 981, 997


• 
  Everett: 203, 294, 381, 382, 387, 389, 394, 410, 420, 544, 545, 601, 843, 917, 944


• 
  Hyde Park (includes Readville and parts of Milton): 214, 272, 276, 333, 360, 361, 362, 364, 408, 604, 675, 705, 833, 910, 990


• 
  Jamaica Plain (includes Roslindale and West Roxbury): 323, 325, 327, 344, 363, 390, 435, 469, 477, 522, 524, 553, 676, 942, 971, 983


• 
  Melrose: 957


• 
  Milton (includes Mattapan, see also Hyde Park): 273, 291, 296, 298, 313, 322, 433, 615, 690, 696, 698, 898, 907, 915, 922, 980


• 
  Newton: 213, 215, 219, 243, 244, 332, 340, 431, 454, 467, 473, 485, 527, 546, 552, 558, 559, 564, 581, 584, 597, 609, 610, 614, 618, 630, 631, 641, 644, 655, 656, 658, 659, 663, 678, 762, 775, 795, 796, 831, 853, 862, 881, 882, 885, 893, 916, 928, 964, 965, 969


• 
  Quincy: 221, 237, 249, 302, 317, 328, 347, 376, 405, 471, 472, 479, 481, 483, 509, 537, 639, 653, 657, 687, 689, 691, 706, 729, 745, 750, 769, 770, 773, 774, 786, 793, 801, 804, 829, 837, 842, 845, 847, 890, 934, 984, 985


• 
  Roxbury: 238, 318, 400, 427, 442, 445, 516, 541, 602, 606, 652, 708, 749, 792, 989


• 
  Saugus: 285


• 
  Somerville: 284, 440, 501, 591, 616, 623, 625, 627, 628, 629, 666, 684, 702, 718, 741, 764, 767, 776, 863, 941, 996


• 
  South Boston: 268, 269, 307, 315, 334, 463, 464, 596, 622, 701, 752, 765, 766


• 
  Watertown: 231, 321, 393, 402, 458, 600, 607, 612, 668, 673, 744, 923, 924, 926, 972


• 
  Winthrop: 207, 329, 539, 841, 846

(857)-NXX

• 
  Belmont: 373, 626,


• 
  Boston Central: 201, 204, 205, 207, 221, 222, 238, 241, 254, 257, 272, 277, 284, 288, 294, 319, 334, 350, 355, 362, 366, 383, 413, 445, 449, 453, 472, 488, 654, 753, 869, 891, 931, 991, 996


• 
  Brighton: 498, 540, 559, 919


• 
  Brookline: 218, 225, 234, 245, 307, 364, 576


• 
  Cambridge: 209, 253, 550, 600, 756, 829, 928, 940, 976, 998


• 
  Charlestown: 389, 452, 588


• 
  Chelsea: 776


• 
  Dorchester: 212, 217, 220


• 
  East Boston: 574


• 
  Everett: 363, 888


• 
  Hyde Park: 342, 345


• 
  Jamaica Plain: 203, 547, 719, 728


• 
  Milton: 598


• 
  Newton: 226, 229, 231, 232, 255, 404, 636


• 
  Quincy: 252, 403, 499, 526, 939


• 
  Roxbury: 399, 492, 544


• 
  Somerville: 227, 523, 995, 997


• 
  South Boston: 401, 496, 524


• 
  Watertown: 228


• 
  Winthrop: 201, 816

N11 codes

• 
  2-1-1: United Way Worldwide (UWW) and the Alliance for Information and Referral Systems (AIRS)


• 
  3-1-1: Used in Newton, Boston, and elsewhere^[1]for 3-1-1 services.


• 
  4-1-1: directory assistance
  


• 
  5-1-1: traffic information or police non-emergency services^[2]
  


• 
  6-1-1: unused (on landlines)


• 
  7-1-1: TDD relay (MassRelay) for the deaf^[3]
  


• 
  8-1-1: underground public utility location (Dig Safe),^[4][5]
  


• 
  9-1-1: emergency services
  

See also

• List of area codes in Massachusetts

References

External links

• NANPA Area Code Map of Massachusetts