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 481, SPIRO, OK 74959-0481
PO BOX 482, SPIRO, OK 74959-0482
PO BOX 483, SPIRO, OK 74959-0483
PO BOX 484, SPIRO, OK 74959-0484
PO BOX 485, SPIRO, OK 74959-0485
PO BOX 486, SPIRO, OK 74959-0486
PO BOX 487, SPIRO, OK 74959-0487
PO BOX 488, SPIRO, OK 74959-0488
PO BOX 489, SPIRO, OK 74959-0489
PO BOX 490, SPIRO, OK 74959-0490
PO BOX 491, SPIRO, OK 74959-0491
PO BOX 492, SPIRO, OK 74959-0492
PO BOX 493, SPIRO, OK 74959-0493
PO BOX 494, SPIRO, OK 74959-0494
PO BOX 495, SPIRO, OK 74959-0495
PO BOX 496, SPIRO, OK 74959-0496
PO BOX 497, SPIRO, OK 74959-0497
PO BOX 498, SPIRO, OK 74959-0498
PO BOX 499, SPIRO, OK 74959-0499
PO BOX 500, SPIRO, OK 74959-0500
PO BOX 501, SPIRO, OK 74959-0501
PO BOX 502, SPIRO, OK 74959-0502
PO BOX 503, SPIRO, OK 74959-0503
PO BOX 504, SPIRO, OK 74959-0504
PO BOX 505, SPIRO, OK 74959-0505
PO BOX 506, SPIRO, OK 74959-0506
PO BOX 507, SPIRO, OK 74959-0507
PO BOX 508, SPIRO, OK 74959-0508
PO BOX 509, SPIRO, OK 74959-0509
PO BOX 510, SPIRO, OK 74959-0510
PO BOX 511, SPIRO, OK 74959-0511
PO BOX 512, SPIRO, OK 74959-0512
PO BOX 513, SPIRO, OK 74959-0513
PO BOX 514, SPIRO, OK 74959-0514
PO BOX 515, SPIRO, OK 74959-0515
PO BOX 516, SPIRO, OK 74959-0516
PO BOX 517, SPIRO, OK 74959-0517
PO BOX 518, SPIRO, OK 74959-0518
PO BOX 519, SPIRO, OK 74959-0519
PO BOX 520, SPIRO, OK 74959-0520
PO BOX 521, SPIRO, OK 74959-0521
PO BOX 522, SPIRO, OK 74959-0522
PO BOX 523, SPIRO, OK 74959-0523
PO BOX 524, SPIRO, OK 74959-0524
PO BOX 525, SPIRO, OK 74959-0525
PO BOX 526, SPIRO, OK 74959-0526
PO BOX 527, SPIRO, OK 74959-0527
PO BOX 528, SPIRO, OK 74959-0528
PO BOX 529, SPIRO, OK 74959-0529
PO BOX 530, SPIRO, OK 74959-0530
PO BOX 531, SPIRO, OK 74959-0531
PO BOX 532, SPIRO, OK 74959-0532
PO BOX 533, SPIRO, OK 74959-0533
PO BOX 534, SPIRO, OK 74959-0534
PO BOX 535, SPIRO, OK 74959-0535
PO BOX 536, SPIRO, OK 74959-0536
PO BOX 537, SPIRO, OK 74959-0537
PO BOX 538, SPIRO, OK 74959-0538
PO BOX 539, SPIRO, OK 74959-0539
PO BOX 540, SPIRO, OK 74959-0540
PO BOX 541, SPIRO, OK 74959-0541
PO BOX 542, SPIRO, OK 74959-0542
PO BOX 543, SPIRO, OK 74959-0543
PO BOX 544, SPIRO, OK 74959-0544
PO BOX 545, SPIRO, OK 74959-0545
PO BOX 546, SPIRO, OK 74959-0546
PO BOX 547, SPIRO, OK 74959-0547
PO BOX 548, SPIRO, OK 74959-0548
PO BOX 549, SPIRO, OK 74959-0549
PO BOX 550, SPIRO, OK 74959-0550
PO BOX 551, SPIRO, OK 74959-0551
PO BOX 552, SPIRO, OK 74959-0552
PO BOX 553, SPIRO, OK 74959-0553
PO BOX 554, SPIRO, OK 74959-0554
PO BOX 555, SPIRO, OK 74959-0555
PO BOX 556, SPIRO, OK 74959-0556
PO BOX 557, SPIRO, OK 74959-0557
PO BOX 558, SPIRO, OK 74959-0558
PO BOX 559, SPIRO, OK 74959-0559
PO BOX 560, SPIRO, OK 74959-0560
PO BOX 561, SPIRO, OK 74959-0561
PO BOX 562, SPIRO, OK 74959-0562
PO BOX 563, SPIRO, OK 74959-0563
PO BOX 564, SPIRO, OK 74959-0564
PO BOX 565, SPIRO, OK 74959-0565
PO BOX 566, SPIRO, OK 74959-0566
PO BOX 567, SPIRO, OK 74959-0567
PO BOX 568, SPIRO, OK 74959-0568
PO BOX 569, SPIRO, OK 74959-0569
PO BOX 570, SPIRO, OK 74959-0570
PO BOX 571, SPIRO, OK 74959-0571
PO BOX 572, SPIRO, OK 74959-0572
PO BOX 573, SPIRO, OK 74959-0573
PO BOX 574, SPIRO, OK 74959-0574
PO BOX 575, SPIRO, OK 74959-0575
PO BOX 576, SPIRO, OK 74959-0576
PO BOX 577, SPIRO, OK 74959-0577
PO BOX 578, SPIRO, OK 74959-0578
PO BOX 579, SPIRO, OK 74959-0579
PO BOX 580, SPIRO, OK 74959-0580
PO BOX 581, SPIRO, OK 74959-0581
PO BOX 582, SPIRO, OK 74959-0582
PO BOX 583, SPIRO, OK 74959-0583
PO BOX 584, SPIRO, OK 74959-0584
PO BOX 585, SPIRO, OK 74959-0585
PO BOX 586, SPIRO, OK 74959-0586
PO BOX 587, SPIRO, OK 74959-0587
PO BOX 588, SPIRO, OK 74959-0588
PO BOX 589, SPIRO, OK 74959-0589
PO BOX 590, SPIRO, OK 74959-0590
PO BOX 591, SPIRO, OK 74959-0591
PO BOX 592, SPIRO, OK 74959-0592
PO BOX 593, SPIRO, OK 74959-0593
PO BOX 594, SPIRO, OK 74959-0594
PO BOX 595, SPIRO, OK 74959-0595
PO BOX 596, SPIRO, OK 74959-0596
PO BOX 597, SPIRO, OK 74959-0597
PO BOX 598, SPIRO, OK 74959-0598
PO BOX 599, SPIRO, OK 74959-0599
PO BOX 600, SPIRO, OK 74959-0600
PO BOX 601, SPIRO, OK 74959-0601
PO BOX 602, SPIRO, OK 74959-0602
PO BOX 603, SPIRO, OK 74959-0603
PO BOX 604, SPIRO, OK 74959-0604
PO BOX 605, SPIRO, OK 74959-0605
PO BOX 606, SPIRO, OK 74959-0606
PO BOX 607, SPIRO, OK 74959-0607
PO BOX 608, SPIRO, OK 74959-0608
PO BOX 609, SPIRO, OK 74959-0609
PO BOX 610, SPIRO, OK 74959-0610
PO BOX 611, SPIRO, OK 74959-0611
PO BOX 612, SPIRO, OK 74959-0612
PO BOX 613, SPIRO, OK 74959-0613
PO BOX 614, SPIRO, OK 74959-0614
PO BOX 615, SPIRO, OK 74959-0615
PO BOX 616, SPIRO, OK 74959-0616
PO BOX 617, SPIRO, OK 74959-0617
PO BOX 618, SPIRO, OK 74959-0618
PO BOX 619, SPIRO, OK 74959-0619
PO BOX 620, SPIRO, OK 74959-0620
PO BOX 621, SPIRO, OK 74959-0621
PO BOX 622, SPIRO, OK 74959-0622
PO BOX 623, SPIRO, OK 74959-0623
PO BOX 624, SPIRO, OK 74959-0624
PO BOX 625, SPIRO, OK 74959-0625
PO BOX 626, SPIRO, OK 74959-0626
PO BOX 627, SPIRO, OK 74959-0627
PO BOX 628, SPIRO, OK 74959-0628
PO BOX 629, SPIRO, OK 74959-0629
PO BOX 630, SPIRO, OK 74959-0630
PO BOX 631, SPIRO, OK 74959-0631
PO BOX 632, SPIRO, OK 74959-0632
PO BOX 633, SPIRO, OK 74959-0633
PO BOX 634, SPIRO, OK 74959-0634
PO BOX 635, SPIRO, OK 74959-0635
PO BOX 636, SPIRO, OK 74959-0636
PO BOX 637, SPIRO, OK 74959-0637
PO BOX 638, SPIRO, OK 74959-0638
PO BOX 639, SPIRO, OK 74959-0639
PO BOX 640, SPIRO, OK 74959-0640
PO BOX 641, SPIRO, OK 74959-0641
PO BOX 642, SPIRO, OK 74959-0642
PO BOX 643, SPIRO, OK 74959-0643
PO BOX 644, SPIRO, OK 74959-0644
PO BOX 645, SPIRO, OK 74959-0645
PO BOX 646, SPIRO, OK 74959-0646
PO BOX 647, SPIRO, OK 74959-0647
PO BOX 648, SPIRO, OK 74959-0648
PO BOX 649, SPIRO, OK 74959-0649
PO BOX 650, SPIRO, OK 74959-0650
PO BOX 651, SPIRO, OK 74959-0651
PO BOX 652, SPIRO, OK 74959-0652
PO BOX 653, SPIRO, OK 74959-0653
PO BOX 654, SPIRO, OK 74959-0654
PO BOX 655, SPIRO, OK 74959-0655
PO BOX 656, SPIRO, OK 74959-0656
PO BOX 657, SPIRO, OK 74959-0657
PO BOX 658, SPIRO, OK 74959-0658
PO BOX 659, SPIRO, OK 74959-0659
PO BOX 660, SPIRO, OK 74959-0660
PO BOX 661, SPIRO, OK 74959-0661
PO BOX 662, SPIRO, OK 74959-0662
PO BOX 663, SPIRO, OK 74959-0663
PO BOX 664, SPIRO, OK 74959-0664
PO BOX 665, SPIRO, OK 74959-0665
PO BOX 666, SPIRO, OK 74959-0666
PO BOX 667, SPIRO, OK 74959-0667
PO BOX 668, SPIRO, OK 74959-0668
PO BOX 669, SPIRO, OK 74959-0669
PO BOX 670, SPIRO, OK 74959-0670
PO BOX 671, SPIRO, OK 74959-0671
PO BOX 672, SPIRO, OK 74959-0672
PO BOX 673, SPIRO, OK 74959-0673
PO BOX 674, SPIRO, OK 74959-0674
PO BOX 675, SPIRO, OK 74959-0675
PO BOX 676, SPIRO, OK 74959-0676
PO BOX 677, SPIRO, OK 74959-0677
PO BOX 678, SPIRO, OK 74959-0678
PO BOX 679, SPIRO, OK 74959-0679
PO BOX 680, SPIRO, OK 74959-0680
PO BOX 681, SPIRO, OK 74959-0681
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