US Area codes by states, district, and territories:

US NORTHEAST:
Connecticut (CT) 203, 475, 860, 959
Maine (ME) 207
Massachusetts (MA) 339, 351, 413, 508, 617, 774, 781, 857, 978
New Hampshire (NH) 603
New Jersey (NJ) 201, 551, 609, 732, 848, 856, 862, 908, 973
New York  (NY) 212, 315, 347, 516, 518, 585, 607, 631, 646, 716, 718, 845, 914, 917
Pennsylvania (PA) 215, 267, 412, 445, 484, 570, 610, 717, 724, 814, 835, 878
Rhode Island (RI) 401
Vermont (VT) 802

US MIDWEST:

Illinois (IL) 217, 224, 309, 312, 331, 464, 618, 630, 708, 773, 815, 847, 872
Indiana (IN) 219, 260, 317, 574, 765,  812
Iowa  (IA) 319, 515, 563, 641, 712
Kansas (KS) 316, 620, 785, 913
Michigan (MI) 231, 248, 269, 313, 517, 586, 616, 734, 810, 906, 947, 989
Minnesota (MN) 218, 320, 507, 612, 651, 763, 952
Missouri (MO) 314, 417, 557, 573, 636, 660, 816, 975
Nebraska (NE) 308, 402
North Dakota (ND) 701
Ohio 216, 234, 283, 330, 419, 440, 513, 567, 614, 740, 937
South Dakota (SD) 605
Wisconsin (WI) 262, 414, 608, 715, 920

US SOUTH:
Alabama (AL)  205, 251, 256, 334
Arkansas (AR) 479, 501, 870
Delaware (DE) 302
Florida (FL) 239, 305, 321, 352, 386, 407, 561, 727, 754, 772, 786, 813, 850, 863, 904, 941, 954
Georgia (GA) 229, 404, 470, 478, 678, 706, 770, 912
Kentucky (KY) 270, 502, 606, 859
Louisiana (LA) 225, 318, 337, 504, 985
Maryland (MD) 227, 240, 301, 410, 443, 667
Mississippi (MS) 228, 601, 662
North Carolina (NC) 252, 336, 704, 828, 910, 919, 980, 984
Oklahoma (OK) 405, 580, 918
South Carolina (SC) 803, 843, 864
Tennessee (TN) 423, 615, 731, 865, 901, 931
Texas  (TX) 210, 214, 254, 281, 361, 409, 469, 512, 682, 713, 737, 806, 817, 830, 832, 903, 915, 936, 940, 956, 972, 979
Virginia (VA) 276, 434, 540, 571, 703, 757, 804
West Virginia (WV) 304

US WEST:
Alaska (AK) 907
Arizona  (AZ) 480, 520, 602, 623, 928
California (CA) 209, 213, 310, 323, 408, 415, 424, 510, 530, 559, 562, 619, 626, 650, 661, 707, 714, 760, 805, 818, 831, 858, 909, 916, 925, 949
Colorado (CO) 303, 719, 720, 970
Hawaii (HI) 808
Idaho (ID) 208
Montana (MT) 406
Nevada (NV) 702, 775
New Mexico (NM) 505
Oregon (OR) 503, 541, 971
Utah (UT) 435, 801
Washington (WA) 206, 253, 360, 425, 509, 564
Wyoming (WY) 307

FEDERAL CAPITAL DISTRICT:
Washington DC 202

US TERRITORIES:
American Samoa (AS) 684
Guam (GU) 671
Northern Mariana Islands (MP) 670
Puerto Rico (PR) 787, 939
US Virgin Islands (VI) 340