Area codes 617 and 857

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 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. 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 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

Counties

Portions of the following counties are covered:

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

Main article: N11 code

2-1-1: United Way Worldwide (UWW) and the Alliance for Information and Referral Systems (AIRS)
3-1-1:
4-1-1: directory assistance
5-1-1: traffic information or police non-emergency services^[1]
6-1-1: unused (on landlines)
7-1-1: TDD relay (MassRelay) for the deaf^[2]
8-1-1: underground public utility location (Dig Safe),^[3]^[4]
9-1-1: emergency services

References

External links

NANPA Area Code Map of Massachusetts

Massachusetts area codes: 339, 351, 413, 508, 617, 774, 781, 857, 978
	North: 339/781
West: 339/781	Area codes 617/857	East: Atlantic Ocean
	South: 339/781

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