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 451, CORPUS CHRISTI, TX 78403-0451
PO BOX 452, CORPUS CHRISTI, TX 78403-0452
PO BOX 453, CORPUS CHRISTI, TX 78403-0453
PO BOX 454, CORPUS CHRISTI, TX 78403-0454
PO BOX 455, CORPUS CHRISTI, TX 78403-0455
PO BOX 456, CORPUS CHRISTI, TX 78403-0456
PO BOX 457, CORPUS CHRISTI, TX 78403-0457
PO BOX 458, CORPUS CHRISTI, TX 78403-0458
PO BOX 459, CORPUS CHRISTI, TX 78403-0459
PO BOX 460, CORPUS CHRISTI, TX 78403-0460
PO BOX 461, CORPUS CHRISTI, TX 78403-0461
PO BOX 462, CORPUS CHRISTI, TX 78403-0462
PO BOX 463, CORPUS CHRISTI, TX 78403-0463
PO BOX 464, CORPUS CHRISTI, TX 78403-0464
PO BOX 465, CORPUS CHRISTI, TX 78403-0465
PO BOX 466, CORPUS CHRISTI, TX 78403-0466
PO BOX 467, CORPUS CHRISTI, TX 78403-0467
PO BOX 468, CORPUS CHRISTI, TX 78403-0468
PO BOX 469, CORPUS CHRISTI, TX 78403-0469
PO BOX 470, CORPUS CHRISTI, TX 78403-0470
PO BOX 471, CORPUS CHRISTI, TX 78403-0471
PO BOX 472, CORPUS CHRISTI, TX 78403-0472
PO BOX 473, CORPUS CHRISTI, TX 78403-0473
PO BOX 474, CORPUS CHRISTI, TX 78403-0474
PO BOX 475, CORPUS CHRISTI, TX 78403-0475
PO BOX 476, CORPUS CHRISTI, TX 78403-0476
PO BOX 477, CORPUS CHRISTI, TX 78403-0477
PO BOX 478, CORPUS CHRISTI, TX 78403-0478
PO BOX 479, CORPUS CHRISTI, TX 78403-0479
PO BOX 480, CORPUS CHRISTI, TX 78403-0480
PO BOX 481, CORPUS CHRISTI, TX 78403-0481
PO BOX 482, CORPUS CHRISTI, TX 78403-0482
PO BOX 483, CORPUS CHRISTI, TX 78403-0483
PO BOX 484, CORPUS CHRISTI, TX 78403-0484
PO BOX 485, CORPUS CHRISTI, TX 78403-0485
PO BOX 486, CORPUS CHRISTI, TX 78403-0486
PO BOX 487, CORPUS CHRISTI, TX 78403-0487
PO BOX 488, CORPUS CHRISTI, TX 78403-0488
PO BOX 489, CORPUS CHRISTI, TX 78403-0489
PO BOX 490, CORPUS CHRISTI, TX 78403-0490
PO BOX 491, CORPUS CHRISTI, TX 78403-0491
PO BOX 492, CORPUS CHRISTI, TX 78403-0492
PO BOX 493, CORPUS CHRISTI, TX 78403-0493
PO BOX 494, CORPUS CHRISTI, TX 78403-0494
PO BOX 495, CORPUS CHRISTI, TX 78403-0495
PO BOX 496, CORPUS CHRISTI, TX 78403-0496
PO BOX 497, CORPUS CHRISTI, TX 78403-0497
PO BOX 498, CORPUS CHRISTI, TX 78403-0498
PO BOX 499, CORPUS CHRISTI, TX 78403-0499
PO BOX 500, CORPUS CHRISTI, TX 78403-0500
PO BOX 501, CORPUS CHRISTI, TX 78403-0501
PO BOX 502, CORPUS CHRISTI, TX 78403-0502
PO BOX 503, CORPUS CHRISTI, TX 78403-0503
PO BOX 504, CORPUS CHRISTI, TX 78403-0504
PO BOX 505, CORPUS CHRISTI, TX 78403-0505
PO BOX 506, CORPUS CHRISTI, TX 78403-0506
PO BOX 507, CORPUS CHRISTI, TX 78403-0507
PO BOX 508, CORPUS CHRISTI, TX 78403-0508
PO BOX 509, CORPUS CHRISTI, TX 78403-0509
PO BOX 510, CORPUS CHRISTI, TX 78403-0510
PO BOX 511, CORPUS CHRISTI, TX 78403-0511
PO BOX 512, CORPUS CHRISTI, TX 78403-0512
PO BOX 513, CORPUS CHRISTI, TX 78403-0513
PO BOX 514, CORPUS CHRISTI, TX 78403-0514
PO BOX 515, CORPUS CHRISTI, TX 78403-0515
PO BOX 516, CORPUS CHRISTI, TX 78403-0516
PO BOX 517, CORPUS CHRISTI, TX 78403-0517
PO BOX 518, CORPUS CHRISTI, TX 78403-0518
PO BOX 519, CORPUS CHRISTI, TX 78403-0519
PO BOX 520, CORPUS CHRISTI, TX 78403-0520
PO BOX 521, CORPUS CHRISTI, TX 78403-0521
PO BOX 522, CORPUS CHRISTI, TX 78403-0522
PO BOX 523, CORPUS CHRISTI, TX 78403-0523
PO BOX 524, CORPUS CHRISTI, TX 78403-0524
PO BOX 525, CORPUS CHRISTI, TX 78403-0525
PO BOX 526, CORPUS CHRISTI, TX 78403-0526
PO BOX 527, CORPUS CHRISTI, TX 78403-0527
PO BOX 528, CORPUS CHRISTI, TX 78403-0528
PO BOX 529, CORPUS CHRISTI, TX 78403-0529
PO BOX 530, CORPUS CHRISTI, TX 78403-0530
PO BOX 531, CORPUS CHRISTI, TX 78403-0531
PO BOX 532, CORPUS CHRISTI, TX 78403-0532
PO BOX 533, CORPUS CHRISTI, TX 78403-0533
PO BOX 534, CORPUS CHRISTI, TX 78403-0534
PO BOX 535, CORPUS CHRISTI, TX 78403-0535
PO BOX 536, CORPUS CHRISTI, TX 78403-0536
PO BOX 537, CORPUS CHRISTI, TX 78403-0537
PO BOX 538, CORPUS CHRISTI, TX 78403-0538
PO BOX 539, CORPUS CHRISTI, TX 78403-0539
PO BOX 540, CORPUS CHRISTI, TX 78403-0540
PO BOX 541, CORPUS CHRISTI, TX 78403-0541
PO BOX 542, CORPUS CHRISTI, TX 78403-0542
PO BOX 543, CORPUS CHRISTI, TX 78403-0543
PO BOX 544, CORPUS CHRISTI, TX 78403-0544
PO BOX 545, CORPUS CHRISTI, TX 78403-0545
PO BOX 546, CORPUS CHRISTI, TX 78403-0546
PO BOX 547, CORPUS CHRISTI, TX 78403-0547
PO BOX 548, CORPUS CHRISTI, TX 78403-0548
PO BOX 549, CORPUS CHRISTI, TX 78403-0549
PO BOX 550, CORPUS CHRISTI, TX 78403-0550
PO BOX 551, CORPUS CHRISTI, TX 78403-0551
PO BOX 552, CORPUS CHRISTI, TX 78403-0552
PO BOX 553, CORPUS CHRISTI, TX 78403-0553
PO BOX 554, CORPUS CHRISTI, TX 78403-0554
PO BOX 555, CORPUS CHRISTI, TX 78403-0555
PO BOX 556, CORPUS CHRISTI, TX 78403-0556
PO BOX 557, CORPUS CHRISTI, TX 78403-0557
PO BOX 558, CORPUS CHRISTI, TX 78403-0558
PO BOX 559, CORPUS CHRISTI, TX 78403-0559
PO BOX 560, CORPUS CHRISTI, TX 78403-0560
PO BOX 561, CORPUS CHRISTI, TX 78403-0561
PO BOX 562, CORPUS CHRISTI, TX 78403-0562
PO BOX 563, CORPUS CHRISTI, TX 78403-0563
PO BOX 564, CORPUS CHRISTI, TX 78403-0564
PO BOX 565, CORPUS CHRISTI, TX 78403-0565
PO BOX 566, CORPUS CHRISTI, TX 78403-0566
PO BOX 567, CORPUS CHRISTI, TX 78403-0567
PO BOX 568, CORPUS CHRISTI, TX 78403-0568
PO BOX 569, CORPUS CHRISTI, TX 78403-0569
PO BOX 570, CORPUS CHRISTI, TX 78403-0570
PO BOX 571, CORPUS CHRISTI, TX 78403-0571
PO BOX 572, CORPUS CHRISTI, TX 78403-0572
PO BOX 573, CORPUS CHRISTI, TX 78403-0573
PO BOX 574, CORPUS CHRISTI, TX 78403-0574
PO BOX 575, CORPUS CHRISTI, TX 78403-0575
PO BOX 576, CORPUS CHRISTI, TX 78403-0576
PO BOX 577, CORPUS CHRISTI, TX 78403-0577
PO BOX 578, CORPUS CHRISTI, TX 78403-0578
PO BOX 579, CORPUS CHRISTI, TX 78403-0579
PO BOX 580, CORPUS CHRISTI, TX 78403-0580
PO BOX 581, CORPUS CHRISTI, TX 78403-0581
PO BOX 582, CORPUS CHRISTI, TX 78403-0582
PO BOX 583, CORPUS CHRISTI, TX 78403-0583
PO BOX 584, CORPUS CHRISTI, TX 78403-0584
PO BOX 585, CORPUS CHRISTI, TX 78403-0585
PO BOX 586, CORPUS CHRISTI, TX 78403-0586
PO BOX 587, CORPUS CHRISTI, TX 78403-0587
PO BOX 588, CORPUS CHRISTI, TX 78403-0588
PO BOX 589, CORPUS CHRISTI, TX 78403-0589
PO BOX 590, CORPUS CHRISTI, TX 78403-0590
PO BOX 591, CORPUS CHRISTI, TX 78403-0591
PO BOX 592, CORPUS CHRISTI, TX 78403-0592
PO BOX 593, CORPUS CHRISTI, TX 78403-0593
PO BOX 594, CORPUS CHRISTI, TX 78403-0594
PO BOX 595, CORPUS CHRISTI, TX 78403-0595
PO BOX 596, CORPUS CHRISTI, TX 78403-0596
PO BOX 597, CORPUS CHRISTI, TX 78403-0597
PO BOX 598, CORPUS CHRISTI, TX 78403-0598
PO BOX 599, CORPUS CHRISTI, TX 78403-0599
PO BOX 600, CORPUS CHRISTI, TX 78403-0600
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