Having completed all the junction lists, I've been unable to find current routes with the following numbers:

• 2, 4, 7, 9, 37, 47, 55, 57, 67, 71, 91;
• 101, 105, 109, 111, 112, 122, 123, 126, 129, 131, 133, 135, 137, 139, 141, 142, 149, 159, 161, 165, 169, 172, 175, 178, 185, 186, 189, 190, 193, 195, 197;
• 200, 203, 205, 207, 211, 223, 229, 236, 237, 242, 243, 245, 250, 256, 260, 264, 265, 266, 269, 270, 273, 275, 277, 278, 280, 289, 290, 293, 294, 297, 298;
• 301, 302, 303, 306, 311, 312, 319, 323, 327, 330, 334, 335, 336, 337, 342, 344, 353, 354, 355, 357, 359, 360, 361, 364, 365, 369, 373, 375, 377, 379, 383, 384, 385, 386, 387, 389, 391, 393, 395, 396, 397, 398, 399;
• 404, 406, 411, 421, 429, 431, 432, 439, 440, 444, 448, 450, 451, 454, 455, 457, 458, 459, 460, 461, 464, 466, 468, 469, 470, 471, 473, 479, 480, 482, 483, 485, 486, 489, 490, 493, 494, 495, 496, 497, 498, 499;
• 500, 503, 506, 508, 509, 510, 511, 512, 515, 517, 520, 521, 525, 526, 527, 529, 530, 535, 537, 538, 539, 540, 541, 542, 543, 544, 545, 548, 552, 556, 557, 558, 559, 560, 561, 564, 565, 566, 567, 569, 570, 571, 572, 573, 574, 575, 576, 577, 578, 582, 583, 584, 585, 586, 587, 589, 591, 592, 593, 594, 595, 596, 597, 598, 599;
• 600, 602, 603, 604, 605, 606, 608, 609, 610, 612, 613, 614, 615, 617, 619, 620, 621, 622, 623, 626, 627, 628, 629, 630, 631, 633, 634, 635, 636, 637, 638, 639, 640, 644, 647, 648, 649, 650, 651, 656, 657, 658, 659, 661, 665, 667, 668, 671, 672, 673, 674, 675, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 691, 692, 693, 694, 695, 697, 698, 699;
• 700, 701, 702, 703, 704, 705, 707, 708, 709, 710, 712, 713, 714, 716, 717, 719, 720, 721, 723, 725, 726, 727, 728, 730, 732, 733, 734, 735, 736, 738, 740, 742, 744, 745, 746, 748, 749, 750, 751, 752, 753, 754, 755, 757, 758, 759, 760, 761, 762, 763, 765, 766, 767, 768, 769, 771, 773, 774, 775, 776, 777, 778, 779, 781, 782, 783, 784, 785, 786, 787, 788, 789, 790, 792, 793, 794, 795, 797, 798, 799.
• 800, 801, 802, 803, 804, 805, 806, 807, 808, 809, 810, 811, 812, 813, 814, 815, 816, 817, 818, 820, 821, 822, 823, 824, 825, 826, 827, 828, 831, 833, 834, 835, 836, 838, 840, 843, 847, 852, 853, 854, 855, 856, 859, 860, 862, 870, 871, 874, 875, 876, 877, 878, 881, 882, 883, 884, 887, 888, 889, 891, 892, 893, 894, 898;
• 900, 904, 905, 907, 908, 909, 911, 912, 916, 918, 919, 920, 922, 923, 925, 927, 929, 930, 931, 932, 933, 935, 936, 937, 938, 939, 941, 942, 943, 945, 947, 951, 952, 953, 959, 960, 961, 962, 963, 964, 966, 967, 968, 971, 972, 974, 975, 976, 977, 979, 983, 984, 986, 988, 990, 991, 992, 996, 998.

If one of these numbers corresponds to a currently numbered route, or if I'm missing a bannered route (business, alternate, truck, etc.), please let me know!