// http://www.worldatlas.com/na/us/area-codes.html

        public static readonly Dictionary<string, List<int>> AreaCodesByState = new Dictionary<string, List<int>>() {
            { "Alabama", new List<int>() { 205, 251, 256, 334 } },
            { "Alaska", new List<int>() { 907 } },
            { "Arizona", new List<int>() { 480, 520, 602, 623, 928 } },
            { "Arkansas", new List<int>() { 479, 501, 870 } },
            { "California", new List<int>() { 209, 213, 310, 323, 408, 415, 510, 530, 559, 562, 619, 626, 650, 661, 707, 714, 760, 805, 818, 831, 858, 909, 916, 925, 949, 951 } },
            { "Colorado", new List<int>() { 303, 719, 970 } },
            { "Connecticut", new List<int>() { 203, 860 } },
            { "Delaware", new List<int>() { 302 } },
            { "District of Columbia", new List<int>() { 202 } },
            { "Florida", new List<int>() { 239, 305, 321, 352, 386, 407, 561, 727, 772, 813, 850, 863, 904, 941, 954 } },
            { "Georgia", new List<int>() { 229, 404, 478, 706, 770, 912 } },
            { "Hawaii", new List<int>() { 808 } },
            { "Idaho", new List<int>() { 208 } },
            { "Illinois", new List<int>() { 217, 309, 312, 618, 630, 708, 773, 815, 847 } },
            { "Indiana", new List<int>() { 219, 260, 317, 574, 765, 812 } },
            { "Iowa", new List<int>() { 319, 515, 563, 641, 712 } },
            { "Kansas", new List<int>() { 316, 620, 785, 913 } },
            { "Kentucky", new List<int>() { 270, 502, 606, 859 } },
            { "Louisiana", new List<int>() { 225, 318, 337, 504, 985 } },
            { "Maine", new List<int>() { 207 } },
            { "Maryland", new List<int>() { 301, 410 } },
            { "Massachusetts", new List<int>() { 413, 508, 617, 781, 978 } },
            { "Michigan", new List<int>() { 231, 248, 269, 313, 517, 586, 616, 734, 810, 906, 989 } },
            { "Minnesota", new List<int>() { 218, 320, 507, 612, 651, 763, 952 } },
            { "Mississippi", new List<int>() { 228, 601, 662 } },
            { "Missouri", new List<int>() { 314, 417, 573, 636, 660, 816 } },
            { "Montana", new List<int>() { 406 } },
            { "Nebraska", new List<int>() { 308, 402 } },
            { "Nevada", new List<int>() { 702, 775 } },
            { "New Hampshire", new List<int>() { 603 } },
            { "New Jersey", new List<int>() { 201, 609, 732, 856, 908, 973 } },
            { "New Mexico", new List<int>() { 505, 575 } },
            { "New York", new List<int>() { 212, 315, 516, 518, 585, 607, 631, 716, 718, 845, 914 } },
            { "North Carolina", new List<int>() { 252, 336, 704, 828, 910, 919 } },
            { "North Dakota", new List<int>() { 701 } },
            { "Ohio", new List<int>() { 216, 330, 419, 440, 513, 614, 740, 937 } },
            { "Oklahoma", new List<int>() { 405, 580, 918 } },
            { "Oregon", new List<int>() { 503, 541 } },
            { "Pennsylvania", new List<int>() { 215, 412, 570, 610, 717, 724, 814 } },
            { "Rhode Island", new List<int>() { 401 } },
            { "South Carolina", new List<int>() { 803, 843, 864 } },
            { "South Dakota", new List<int>() { 605 } },
            { "Tennessee", new List<int>() { 423, 615, 731, 865, 901, 931 } },
            { "Texas", new List<int>() { 210, 214, 254, 281, 325, 361, 409, 432, 512, 713, 806, 817, 830, 903, 915, 936, 940, 956, 972, 979 } },
            { "Utah", new List<int>() { 435, 801 } },
            { "Vermont", new List<int>() { 802 } },
            { "Virginia", new List<int>() { 276, 434, 540, 703, 757, 804 } },
            { "Washington", new List<int>() { 206, 253, 360, 425, 509 } },
            { "West Virginia", new List<int>() { 304 } },
            { "Wisconsin", new List<int>() { 262, 414, 608, 715, 920 } },
            { "Wyoming", new List<int>() { 307 } },
        };

        public static readonly Dictionary<int, List<string>> StatesByAreaCode = new Dictionary<int, List<string>>() {
            { 201, new List<string>() { "New Jersey" } },
            { 202, new List<string>() { "District of Columbia" } },
            { 203, new List<string>() { "Connecticut" } },
            { 205, new List<string>() { "Alabama" } },
            { 206, new List<string>() { "Washington" } },
            { 207, new List<string>() { "Maine" } },
            { 208, new List<string>() { "Idaho" } },
            { 209, new List<string>() { "California" } },
            { 210, new List<string>() { "Texas" } },
            { 212, new List<string>() { "New York" } },
            { 213, new List<string>() { "California" } },
            { 214, new List<string>() { "Texas" } },
            { 215, new List<string>() { "Pennsylvania" } },
            { 216, new List<string>() { "Ohio" } },
            { 217, new List<string>() { "Illinois" } },
            { 218, new List<string>() { "Minnesota" } },
            { 219, new List<string>() { "Indiana" } },
            { 225, new List<string>() { "Louisiana" } },
            { 228, new List<string>() { "Mississippi" } },
            { 229, new List<string>() { "Georgia" } },
            { 231, new List<string>() { "Michigan" } },
            { 239, new List<string>() { "Florida" } },
            { 248, new List<string>() { "Michigan" } },
            { 251, new List<string>() { "Alabama" } },
            { 252, new List<string>() { "North Carolina" } },
            { 253, new List<string>() { "Washington" } },
            { 254, new List<string>() { "Texas" } },
            { 256, new List<string>() { "Alabama" } },
            { 260, new List<string>() { "Indiana" } },
            { 262, new List<string>() { "Wisconsin" } },
            { 269, new List<string>() { "Michigan" } },
            { 270, new List<string>() { "Kentucky" } },
            { 276, new List<string>() { "Virginia" } },
            { 281, new List<string>() { "Texas" } },
            { 301, new List<string>() { "Maryland" } },
            { 302, new List<string>() { "Delaware" } },
            { 303, new List<string>() { "Colorado" } },
            { 304, new List<string>() { "West Virginia" } },
            { 305, new List<string>() { "Florida" } },
            { 307, new List<string>() { "Wyoming" } },
            { 308, new List<string>() { "Nebraska" } },
            { 309, new List<string>() { "Illinois" } },
            { 310, new List<string>() { "California" } },
            { 312, new List<string>() { "Illinois" } },
            { 313, new List<string>() { "Michigan" } },
            { 314, new List<string>() { "Missouri" } },
            { 315, new List<string>() { "New York" } },
            { 316, new List<string>() { "Kansas" } },
            { 317, new List<string>() { "Indiana" } },
            { 318, new List<string>() { "Louisiana" } },
            { 319, new List<string>() { "Iowa" } },
            { 320, new List<string>() { "Minnesota" } },
            { 321, new List<string>() { "Florida" } },
            { 323, new List<string>() { "California" } },
            { 325, new List<string>() { "Texas" } },
            { 330, new List<string>() { "Ohio" } },
            { 334, new List<string>() { "Alabama" } },
            { 336, new List<string>() { "North Carolina" } },
            { 337, new List<string>() { "Louisiana" } },
            { 352, new List<string>() { "Florida" } },
            { 360, new List<string>() { "Washington" } },
            { 361, new List<string>() { "Texas" } },
            { 386, new List<string>() { "Florida" } },
            { 401, new List<string>() { "Rhode Island" } },
            { 402, new List<string>() { "Nebraska" } },
            { 404, new List<string>() { "Georgia" } },
            { 405, new List<string>() { "Oklahoma" } },
            { 406, new List<string>() { "Montana" } },
            { 407, new List<string>() { "Florida" } },
            { 408, new List<string>() { "California" } },
            { 409, new List<string>() { "Texas" } },
            { 410, new List<string>() { "Maryland" } },
            { 412, new List<string>() { "Pennsylvania" } },
            { 413, new List<string>() { "Massachusetts" } },
            { 414, new List<string>() { "Wisconsin" } },
            { 415, new List<string>() { "California" } },
            { 417, new List<string>() { "Missouri" } },
            { 419, new List<string>() { "Ohio" } },
            { 423, new List<string>() { "Tennessee" } },
            { 425, new List<string>() { "Washington" } },
            { 432, new List<string>() { "Texas" } },
            { 434, new List<string>() { "Virginia" } },
            { 435, new List<string>() { "Utah" } },
            { 440, new List<string>() { "Ohio" } },
            { 478, new List<string>() { "Georgia" } },
            { 479, new List<string>() { "Arkansas" } },
            { 480, new List<string>() { "Arizona" } },
            { 501, new List<string>() { "Arkansas" } },
            { 502, new List<string>() { "Kentucky" } },
            { 503, new List<string>() { "Oregon" } },
            { 504, new List<string>() { "Louisiana" } },
            { 505, new List<string>() { "New Mexico" } },
            { 507, new List<string>() { "Minnesota" } },
            { 508, new List<string>() { "Massachusetts" } },
            { 509, new List<string>() { "Washington" } },
            { 510, new List<string>() { "California" } },
            { 512, new List<string>() { "Texas" } },
            { 513, new List<string>() { "Ohio" } },
            { 515, new List<string>() { "Iowa" } },
            { 516, new List<string>() { "New York" } },
            { 517, new List<string>() { "Michigan" } },
            { 518, new List<string>() { "New York" } },
            { 520, new List<string>() { "Arizona" } },
            { 530, new List<string>() { "California" } },
            { 540, new List<string>() { "Virginia" } },
            { 541, new List<string>() { "Oregon" } },
            { 559, new List<string>() { "California" } },
            { 561, new List<string>() { "Florida" } },
            { 562, new List<string>() { "California" } },
            { 563, new List<string>() { "Iowa" } },
            { 570, new List<string>() { "Pennsylvania" } },
            { 573, new List<string>() { "Missouri" } },
            { 574, new List<string>() { "Indiana" } },
            { 575, new List<string>() { "New Mexico" } },
            { 580, new List<string>() { "Oklahoma" } },
            { 585, new List<string>() { "New York" } },
            { 586, new List<string>() { "Michigan" } },
            { 601, new List<string>() { "Mississippi" } },
            { 602, new List<string>() { "Arizona" } },
            { 603, new List<string>() { "New Hampshire" } },
            { 605, new List<string>() { "South Dakota" } },
            { 606, new List<string>() { "Kentucky" } },
            { 607, new List<string>() { "New York" } },
            { 608, new List<string>() { "Wisconsin" } },
            { 609, new List<string>() { "New Jersey" } },
            { 610, new List<string>() { "Pennsylvania" } },
            { 612, new List<string>() { "Minnesota" } },
            { 614, new List<string>() { "Ohio" } },
            { 615, new List<string>() { "Tennessee" } },
            { 616, new List<string>() { "Michigan" } },
            { 617, new List<string>() { "Massachusetts" } },
            { 618, new List<string>() { "Illinois" } },
            { 619, new List<string>() { "California" } },
            { 620, new List<string>() { "Kansas" } },
            { 623, new List<string>() { "Arizona" } },
            { 626, new List<string>() { "California" } },
            { 630, new List<string>() { "Illinois" } },
            { 631, new List<string>() { "New York" } },
            { 636, new List<string>() { "Missouri" } },
            { 641, new List<string>() { "Iowa" } },
            { 650, new List<string>() { "California" } },
            { 651, new List<string>() { "Minnesota" } },
            { 660, new List<string>() { "Missouri" } },
            { 661, new List<string>() { "California" } },
            { 662, new List<string>() { "Mississippi" } },
            { 701, new List<string>() { "North Dakota" } },
            { 702, new List<string>() { "Nevada" } },
            { 703, new List<string>() { "Virginia" } },
            { 704, new List<string>() { "North Carolina" } },
            { 706, new List<string>() { "Georgia" } },
            { 707, new List<string>() { "California" } },
            { 708, new List<string>() { "Illinois" } },
            { 712, new List<string>() { "Iowa" } },
            { 713, new List<string>() { "Texas" } },
            { 714, new List<string>() { "California" } },
            { 715, new List<string>() { "Wisconsin" } },
            { 716, new List<string>() { "New York" } },
            { 717, new List<string>() { "Pennsylvania" } },
            { 718, new List<string>() { "New York" } },
            { 719, new List<string>() { "Colorado" } },
            { 724, new List<string>() { "Pennsylvania" } },
            { 727, new List<string>() { "Florida" } },
            { 731, new List<string>() { "Tennessee" } },
            { 732, new List<string>() { "New Jersey" } },
            { 734, new List<string>() { "Michigan" } },
            { 740, new List<string>() { "Ohio" } },
            { 757, new List<string>() { "Virginia" } },
            { 760, new List<string>() { "California" } },
            { 763, new List<string>() { "Minnesota" } },
            { 765, new List<string>() { "Indiana" } },
            { 770, new List<string>() { "Georgia" } },
            { 772, new List<string>() { "Florida" } },
            { 773, new List<string>() { "Illinois" } },
            { 775, new List<string>() { "Nevada" } },
            { 781, new List<string>() { "Massachusetts" } },
            { 785, new List<string>() { "Kansas" } },
            { 801, new List<string>() { "Utah" } },
            { 802, new List<string>() { "Vermont" } },
            { 803, new List<string>() { "South Carolina" } },
            { 804, new List<string>() { "Virginia" } },
            { 805, new List<string>() { "California" } },
            { 806, new List<string>() { "Texas" } },
            { 808, new List<string>() { "Hawaii" } },
            { 810, new List<string>() { "Michigan" } },
            { 812, new List<string>() { "Indiana" } },
            { 813, new List<string>() { "Florida" } },
            { 814, new List<string>() { "Pennsylvania" } },
            { 815, new List<string>() { "Illinois" } },
            { 816, new List<string>() { "Missouri" } },
            { 817, new List<string>() { "Texas" } },
            { 818, new List<string>() { "California" } },
            { 828, new List<string>() { "North Carolina" } },
            { 830, new List<string>() { "Texas" } },
            { 831, new List<string>() { "California" } },
            { 843, new List<string>() { "South Carolina" } },
            { 845, new List<string>() { "New York" } },
            { 847, new List<string>() { "Illinois" } },
            { 850, new List<string>() { "Florida" } },
            { 856, new List<string>() { "New Jersey" } },
            { 858, new List<string>() { "California" } },
            { 859, new List<string>() { "Kentucky" } },
            { 860, new List<string>() { "Connecticut" } },
            { 863, new List<string>() { "Florida" } },
            { 864, new List<string>() { "South Carolina" } },
            { 865, new List<string>() { "Tennessee" } },
            { 870, new List<string>() { "Arkansas" } },
            { 901, new List<string>() { "Tennessee" } },
            { 903, new List<string>() { "Texas" } },
            { 904, new List<string>() { "Florida" } },
            { 906, new List<string>() { "Michigan" } },
            { 907, new List<string>() { "Alaska" } },
            { 908, new List<string>() { "New Jersey" } },
            { 909, new List<string>() { "California" } },
            { 910, new List<string>() { "North Carolina" } },
            { 912, new List<string>() { "Georgia" } },
            { 913, new List<string>() { "Kansas" } },
            { 914, new List<string>() { "New York" } },
            { 915, new List<string>() { "Texas" } },
            { 916, new List<string>() { "California" } },
            { 918, new List<string>() { "Oklahoma" } },
            { 919, new List<string>() { "North Carolina" } },
            { 920, new List<string>() { "Wisconsin" } },
            { 925, new List<string>() { "California" } },
            { 928, new List<string>() { "Arizona" } },
            { 931, new List<string>() { "Tennessee" } },
            { 936, new List<string>() { "Texas" } },
            { 937, new List<string>() { "Ohio" } },
            { 940, new List<string>() { "Texas" } },
            { 941, new List<string>() { "Florida" } },
            { 949, new List<string>() { "California" } },
            { 951, new List<string>() { "California" } },
            { 952, new List<string>() { "Minnesota" } },
            { 954, new List<string>() { "Florida" } },
            { 956, new List<string>() { "Texas" } },
            { 970, new List<string>() { "Colorado" } },
            { 972, new List<string>() { "Texas" } },
            { 973, new List<string>() { "New Jersey" } },
            { 978, new List<string>() { "Massachusetts" } },
            { 979, new List<string>() { "Texas" } },
            { 985, new List<string>() { "Louisiana" } },
            { 989, new List<string>() { "Michigan" } },
        };