A PO BOX number can be less than or more than four digit. For post office boxes, the general rule is that each box has its own ZIP+4 code.
The last four digit is often one of the following:
1. Zero plus the last three digits of the box number (eg. PO BOX 1001, Los Angeles CA 90001-0001).
2. The last four digits of the box number (eg. PO BOX 9991, Twin Peaks CA 92391-9991).
3. If the box number is less than four digits, enough zeros prepended to the front of the box number to produce a four-digit number(eg. PO BOX 1, Shreveport LA 71161-0001).
However, there is no uniform rule, the zip code plus four is for reference only, the ZIP+4 code must be looked up individually for each box in the USPS offical website.
PO BOX 401, MIDLAND, TX 79702-0401
PO BOX 402, MIDLAND, TX 79702-0402
PO BOX 403, MIDLAND, TX 79702-0403
PO BOX 404, MIDLAND, TX 79702-0404
PO BOX 405, MIDLAND, TX 79702-0405
PO BOX 406, MIDLAND, TX 79702-0406
PO BOX 407, MIDLAND, TX 79702-0407
PO BOX 408, MIDLAND, TX 79702-0408
PO BOX 409, MIDLAND, TX 79702-0409
PO BOX 410, MIDLAND, TX 79702-0410
PO BOX 411, MIDLAND, TX 79702-0411
PO BOX 412, MIDLAND, TX 79702-0412
PO BOX 413, MIDLAND, TX 79702-0413
PO BOX 414, MIDLAND, TX 79702-0414
PO BOX 415, MIDLAND, TX 79702-0415
PO BOX 416, MIDLAND, TX 79702-0416
PO BOX 417, MIDLAND, TX 79702-0417
PO BOX 418, MIDLAND, TX 79702-0418
PO BOX 419, MIDLAND, TX 79702-0419
PO BOX 420, MIDLAND, TX 79702-0420
PO BOX 421, MIDLAND, TX 79702-0421
PO BOX 422, MIDLAND, TX 79702-0422
PO BOX 423, MIDLAND, TX 79702-0423
PO BOX 424, MIDLAND, TX 79702-0424
PO BOX 425, MIDLAND, TX 79702-0425
PO BOX 426, MIDLAND, TX 79702-0426
PO BOX 427, MIDLAND, TX 79702-0427
PO BOX 428, MIDLAND, TX 79702-0428
PO BOX 429, MIDLAND, TX 79702-0429
PO BOX 430, MIDLAND, TX 79702-0430
PO BOX 431, MIDLAND, TX 79702-0431
PO BOX 432, MIDLAND, TX 79702-0432
PO BOX 433, MIDLAND, TX 79702-0433
PO BOX 434, MIDLAND, TX 79702-0434
PO BOX 435, MIDLAND, TX 79702-0435
PO BOX 436, MIDLAND, TX 79702-0436
PO BOX 437, MIDLAND, TX 79702-0437
PO BOX 438, MIDLAND, TX 79702-0438
PO BOX 439, MIDLAND, TX 79702-0439
PO BOX 440, MIDLAND, TX 79702-0440
PO BOX 441, MIDLAND, TX 79702-0441
PO BOX 442, MIDLAND, TX 79702-0442
PO BOX 443, MIDLAND, TX 79702-0443
PO BOX 444, MIDLAND, TX 79702-0444
PO BOX 445, MIDLAND, TX 79702-0445
PO BOX 446, MIDLAND, TX 79702-0446
PO BOX 447, MIDLAND, TX 79702-0447
PO BOX 448, MIDLAND, TX 79702-0448
PO BOX 449, MIDLAND, TX 79702-0449
PO BOX 450, MIDLAND, TX 79702-0450
PO BOX 451, MIDLAND, TX 79702-0451
PO BOX 452, MIDLAND, TX 79702-0452
PO BOX 453, MIDLAND, TX 79702-0453
PO BOX 454, MIDLAND, TX 79702-0454
PO BOX 455, MIDLAND, TX 79702-0455
PO BOX 456, MIDLAND, TX 79702-0456
PO BOX 457, MIDLAND, TX 79702-0457
PO BOX 458, MIDLAND, TX 79702-0458
PO BOX 459, MIDLAND, TX 79702-0459
PO BOX 460, MIDLAND, TX 79702-0460
PO BOX 461, MIDLAND, TX 79702-0461
PO BOX 462, MIDLAND, TX 79702-0462
PO BOX 463, MIDLAND, TX 79702-0463
PO BOX 464, MIDLAND, TX 79702-0464
PO BOX 465, MIDLAND, TX 79702-0465
PO BOX 466, MIDLAND, TX 79702-0466
PO BOX 467, MIDLAND, TX 79702-0467
PO BOX 468, MIDLAND, TX 79702-0468
PO BOX 469, MIDLAND, TX 79702-0469
PO BOX 470, MIDLAND, TX 79702-0470
PO BOX 471, MIDLAND, TX 79702-0471
PO BOX 472, MIDLAND, TX 79702-0472
PO BOX 473, MIDLAND, TX 79702-0473
PO BOX 474, MIDLAND, TX 79702-0474
PO BOX 475, MIDLAND, TX 79702-0475
PO BOX 476, MIDLAND, TX 79702-0476
PO BOX 477, MIDLAND, TX 79702-0477
PO BOX 478, MIDLAND, TX 79702-0478
PO BOX 479, MIDLAND, TX 79702-0479
PO BOX 480, MIDLAND, TX 79702-0480
PO BOX 481, MIDLAND, TX 79702-0481
PO BOX 482, MIDLAND, TX 79702-0482
PO BOX 483, MIDLAND, TX 79702-0483
PO BOX 484, MIDLAND, TX 79702-0484
PO BOX 485, MIDLAND, TX 79702-0485
PO BOX 486, MIDLAND, TX 79702-0486
PO BOX 487, MIDLAND, TX 79702-0487
PO BOX 488, MIDLAND, TX 79702-0488
PO BOX 489, MIDLAND, TX 79702-0489
PO BOX 490, MIDLAND, TX 79702-0490
PO BOX 491, MIDLAND, TX 79702-0491
PO BOX 492, MIDLAND, TX 79702-0492
PO BOX 493, MIDLAND, TX 79702-0493
PO BOX 494, MIDLAND, TX 79702-0494
PO BOX 495, MIDLAND, TX 79702-0495
PO BOX 496, MIDLAND, TX 79702-0496
PO BOX 497, MIDLAND, TX 79702-0497
PO BOX 498, MIDLAND, TX 79702-0498
PO BOX 499, MIDLAND, TX 79702-0499
PO BOX 500, MIDLAND, TX 79702-0500
PO BOX 501, MIDLAND, TX 79702-0501
PO BOX 502, MIDLAND, TX 79702-0502
PO BOX 503, MIDLAND, TX 79702-0503
PO BOX 504, MIDLAND, TX 79702-0504
PO BOX 505, MIDLAND, TX 79702-0505
PO BOX 506, MIDLAND, TX 79702-0506
PO BOX 507, MIDLAND, TX 79702-0507
PO BOX 508, MIDLAND, TX 79702-0508
PO BOX 509, MIDLAND, TX 79702-0509
PO BOX 510, MIDLAND, TX 79702-0510
PO BOX 511, MIDLAND, TX 79702-0511
PO BOX 512, MIDLAND, TX 79702-0512
PO BOX 513, MIDLAND, TX 79702-0513
PO BOX 514, MIDLAND, TX 79702-0514
PO BOX 515, MIDLAND, TX 79702-0515
PO BOX 516, MIDLAND, TX 79702-0516
PO BOX 517, MIDLAND, TX 79702-0517
PO BOX 518, MIDLAND, TX 79702-0518
PO BOX 519, MIDLAND, TX 79702-0519
PO BOX 520, MIDLAND, TX 79702-0520
PO BOX 521, MIDLAND, TX 79702-0521
PO BOX 522, MIDLAND, TX 79702-0522
PO BOX 523, MIDLAND, TX 79702-0523
PO BOX 524, MIDLAND, TX 79702-0524
PO BOX 525, MIDLAND, TX 79702-0525
PO BOX 526, MIDLAND, TX 79702-0526
PO BOX 527, MIDLAND, TX 79702-0527
PO BOX 528, MIDLAND, TX 79702-0528
PO BOX 529, MIDLAND, TX 79702-0529
PO BOX 530, MIDLAND, TX 79702-0530
PO BOX 531, MIDLAND, TX 79702-0531
PO BOX 532, MIDLAND, TX 79702-0532
PO BOX 533, MIDLAND, TX 79702-0533
PO BOX 534, MIDLAND, TX 79702-0534
PO BOX 535, MIDLAND, TX 79702-0535
PO BOX 536, MIDLAND, TX 79702-0536
PO BOX 537, MIDLAND, TX 79702-0537
PO BOX 538, MIDLAND, TX 79702-0538
PO BOX 539, MIDLAND, TX 79702-0539
PO BOX 540, MIDLAND, TX 79702-0540
PO BOX 541, MIDLAND, TX 79702-0541
PO BOX 542, MIDLAND, TX 79702-0542
PO BOX 543, MIDLAND, TX 79702-0543
PO BOX 544, MIDLAND, TX 79702-0544
PO BOX 545, MIDLAND, TX 79702-0545
PO BOX 546, MIDLAND, TX 79702-0546
PO BOX 547, MIDLAND, TX 79702-0547
PO BOX 548, MIDLAND, TX 79702-0548
PO BOX 549, MIDLAND, TX 79702-0549
PO BOX 550, MIDLAND, TX 79702-0550
PO BOX 551, MIDLAND, TX 79702-0551
PO BOX 552, MIDLAND, TX 79702-0552
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