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, BIXBY, OK 74008-0481
PO BOX 482, BIXBY, OK 74008-0482
PO BOX 483, BIXBY, OK 74008-0483
PO BOX 484, BIXBY, OK 74008-0484
PO BOX 485, BIXBY, OK 74008-0485
PO BOX 486, BIXBY, OK 74008-0486
PO BOX 487, BIXBY, OK 74008-0487
PO BOX 488, BIXBY, OK 74008-0488
PO BOX 489, BIXBY, OK 74008-0489
PO BOX 490, BIXBY, OK 74008-0490
PO BOX 491, BIXBY, OK 74008-0491
PO BOX 492, BIXBY, OK 74008-0492
PO BOX 493, BIXBY, OK 74008-0493
PO BOX 494, BIXBY, OK 74008-0494
PO BOX 495, BIXBY, OK 74008-0495
PO BOX 496, BIXBY, OK 74008-0496
PO BOX 497, BIXBY, OK 74008-0497
PO BOX 498, BIXBY, OK 74008-0498
PO BOX 499, BIXBY, OK 74008-0499
PO BOX 500, BIXBY, OK 74008-0500
PO BOX 501, BIXBY, OK 74008-0501
PO BOX 502, BIXBY, OK 74008-0502
PO BOX 503, BIXBY, OK 74008-0503
PO BOX 504, BIXBY, OK 74008-0504
PO BOX 505, BIXBY, OK 74008-0505
PO BOX 506, BIXBY, OK 74008-0506
PO BOX 507, BIXBY, OK 74008-0507
PO BOX 508, BIXBY, OK 74008-0508
PO BOX 509, BIXBY, OK 74008-0509
PO BOX 510, BIXBY, OK 74008-0510
PO BOX 511, BIXBY, OK 74008-0511
PO BOX 512, BIXBY, OK 74008-0512
PO BOX 513, BIXBY, OK 74008-0513
PO BOX 514, BIXBY, OK 74008-0514
PO BOX 515, BIXBY, OK 74008-0515
PO BOX 516, BIXBY, OK 74008-0516
PO BOX 517, BIXBY, OK 74008-0517
PO BOX 518, BIXBY, OK 74008-0518
PO BOX 519, BIXBY, OK 74008-0519
PO BOX 520, BIXBY, OK 74008-0520
PO BOX 521, BIXBY, OK 74008-0521
PO BOX 522, BIXBY, OK 74008-0522
PO BOX 523, BIXBY, OK 74008-0523
PO BOX 524, BIXBY, OK 74008-0524
PO BOX 525, BIXBY, OK 74008-0525
PO BOX 526, BIXBY, OK 74008-0526
PO BOX 527, BIXBY, OK 74008-0527
PO BOX 528, BIXBY, OK 74008-0528
PO BOX 529, BIXBY, OK 74008-0529
PO BOX 530, BIXBY, OK 74008-0530
PO BOX 531, BIXBY, OK 74008-0531
PO BOX 532, BIXBY, OK 74008-0532
PO BOX 533, BIXBY, OK 74008-0533
PO BOX 534, BIXBY, OK 74008-0534
PO BOX 535, BIXBY, OK 74008-0535
PO BOX 536, BIXBY, OK 74008-0536
PO BOX 537, BIXBY, OK 74008-0537
PO BOX 538, BIXBY, OK 74008-0538
PO BOX 539, BIXBY, OK 74008-0539
PO BOX 540, BIXBY, OK 74008-0540
PO BOX 541, BIXBY, OK 74008-0541
PO BOX 542, BIXBY, OK 74008-0542
PO BOX 543, BIXBY, OK 74008-0543
PO BOX 544, BIXBY, OK 74008-0544
PO BOX 545, BIXBY, OK 74008-0545
PO BOX 546, BIXBY, OK 74008-0546
PO BOX 547, BIXBY, OK 74008-0547
PO BOX 548, BIXBY, OK 74008-0548
PO BOX 549, BIXBY, OK 74008-0549
PO BOX 550, BIXBY, OK 74008-0550
PO BOX 551, BIXBY, OK 74008-0551
PO BOX 552, BIXBY, OK 74008-0552
PO BOX 553, BIXBY, OK 74008-0553
PO BOX 554, BIXBY, OK 74008-0554
PO BOX 555, BIXBY, OK 74008-0555
PO BOX 556, BIXBY, OK 74008-0556
PO BOX 557, BIXBY, OK 74008-0557
PO BOX 558, BIXBY, OK 74008-0558
PO BOX 559, BIXBY, OK 74008-0559
PO BOX 560, BIXBY, OK 74008-0560
PO BOX 561, BIXBY, OK 74008-0561
PO BOX 562, BIXBY, OK 74008-0562
PO BOX 563, BIXBY, OK 74008-0563
PO BOX 564, BIXBY, OK 74008-0564
PO BOX 565, BIXBY, OK 74008-0565
PO BOX 566, BIXBY, OK 74008-0566
PO BOX 567, BIXBY, OK 74008-0567
PO BOX 568, BIXBY, OK 74008-0568
PO BOX 569, BIXBY, OK 74008-0569
PO BOX 570, BIXBY, OK 74008-0570
PO BOX 571, BIXBY, OK 74008-0571
PO BOX 572, BIXBY, OK 74008-0572
PO BOX 573, BIXBY, OK 74008-0573
PO BOX 574, BIXBY, OK 74008-0574
PO BOX 575, BIXBY, OK 74008-0575
PO BOX 576, BIXBY, OK 74008-0576
PO BOX 577, BIXBY, OK 74008-0577
PO BOX 578, BIXBY, OK 74008-0578
PO BOX 579, BIXBY, OK 74008-0579
PO BOX 580, BIXBY, OK 74008-0580
PO BOX 581, BIXBY, OK 74008-0581
PO BOX 582, BIXBY, OK 74008-0582
PO BOX 583, BIXBY, OK 74008-0583
PO BOX 584, BIXBY, OK 74008-0584
PO BOX 585, BIXBY, OK 74008-0585
PO BOX 586, BIXBY, OK 74008-0586
PO BOX 587, BIXBY, OK 74008-0587
PO BOX 588, BIXBY, OK 74008-0588
PO BOX 589, BIXBY, OK 74008-0589
PO BOX 590, BIXBY, OK 74008-0590
PO BOX 591, BIXBY, OK 74008-0591
PO BOX 592, BIXBY, OK 74008-0592
PO BOX 593, BIXBY, OK 74008-0593
PO BOX 594, BIXBY, OK 74008-0594
PO BOX 595, BIXBY, OK 74008-0595
PO BOX 596, BIXBY, OK 74008-0596
PO BOX 597, BIXBY, OK 74008-0597
PO BOX 598, BIXBY, OK 74008-0598
PO BOX 599, BIXBY, OK 74008-0599
PO BOX 600, BIXBY, OK 74008-0600
PO BOX 601, BIXBY, OK 74008-0601
PO BOX 602, BIXBY, OK 74008-0602
PO BOX 603, BIXBY, OK 74008-0603
PO BOX 604, BIXBY, OK 74008-0604
PO BOX 605, BIXBY, OK 74008-0605
PO BOX 606, BIXBY, OK 74008-0606
PO BOX 607, BIXBY, OK 74008-0607
PO BOX 608, BIXBY, OK 74008-0608
PO BOX 609, BIXBY, OK 74008-0609
PO BOX 610, BIXBY, OK 74008-0610
PO BOX 611, BIXBY, OK 74008-0611
PO BOX 612, BIXBY, OK 74008-0612
PO BOX 613, BIXBY, OK 74008-0613
PO BOX 614, BIXBY, OK 74008-0614
PO BOX 615, BIXBY, OK 74008-0615
PO BOX 616, BIXBY, OK 74008-0616
PO BOX 617, BIXBY, OK 74008-0617
PO BOX 618, BIXBY, OK 74008-0618
PO BOX 619, BIXBY, OK 74008-0619
PO BOX 620, BIXBY, OK 74008-0620
PO BOX 621, BIXBY, OK 74008-0621
PO BOX 622, BIXBY, OK 74008-0622
PO BOX 623, BIXBY, OK 74008-0623
PO BOX 624, BIXBY, OK 74008-0624
PO BOX 625, BIXBY, OK 74008-0625
PO BOX 626, BIXBY, OK 74008-0626
PO BOX 627, BIXBY, OK 74008-0627
PO BOX 628, BIXBY, OK 74008-0628
PO BOX 629, BIXBY, OK 74008-0629
PO BOX 630, BIXBY, OK 74008-0630
PO BOX 631, BIXBY, OK 74008-0631
PO BOX 632, BIXBY, OK 74008-0632
PO BOX 633, BIXBY, OK 74008-0633
PO BOX 634, BIXBY, OK 74008-0634
PO BOX 635, BIXBY, OK 74008-0635
PO BOX 636, BIXBY, OK 74008-0636
PO BOX 637, BIXBY, OK 74008-0637
PO BOX 638, BIXBY, OK 74008-0638
PO BOX 639, BIXBY, OK 74008-0639
PO BOX 640, BIXBY, OK 74008-0640
PO BOX 641, BIXBY, OK 74008-0641
PO BOX 642, BIXBY, OK 74008-0642
PO BOX 643, BIXBY, OK 74008-0643
PO BOX 644, BIXBY, OK 74008-0644
PO BOX 645, BIXBY, OK 74008-0645
PO BOX 646, BIXBY, OK 74008-0646
PO BOX 647, BIXBY, OK 74008-0647
PO BOX 648, BIXBY, OK 74008-0648
PO BOX 649, BIXBY, OK 74008-0649
PO BOX 650, BIXBY, OK 74008-0650
PO BOX 651, BIXBY, OK 74008-0651
PO BOX 652, BIXBY, OK 74008-0652
PO BOX 653, BIXBY, OK 74008-0653
PO BOX 654, BIXBY, OK 74008-0654
PO BOX 655, BIXBY, OK 74008-0655
PO BOX 656, BIXBY, OK 74008-0656
PO BOX 657, BIXBY, OK 74008-0657
PO BOX 658, BIXBY, OK 74008-0658
PO BOX 659, BIXBY, OK 74008-0659
PO BOX 660, BIXBY, OK 74008-0660
PO BOX 661, BIXBY, OK 74008-0661
PO BOX 662, BIXBY, OK 74008-0662
PO BOX 663, BIXBY, OK 74008-0663
PO BOX 664, BIXBY, OK 74008-0664
PO BOX 665, BIXBY, OK 74008-0665
PO BOX 666, BIXBY, OK 74008-0666
PO BOX 667, BIXBY, OK 74008-0667
PO BOX 668, BIXBY, OK 74008-0668
PO BOX 669, BIXBY, OK 74008-0669
PO BOX 670, BIXBY, OK 74008-0670
PO BOX 671, BIXBY, OK 74008-0671
PO BOX 672, BIXBY, OK 74008-0672
PO BOX 673, BIXBY, OK 74008-0673
PO BOX 674, BIXBY, OK 74008-0674
PO BOX 675, BIXBY, OK 74008-0675
PO BOX 676, BIXBY, OK 74008-0676
PO BOX 677, BIXBY, OK 74008-0677
PO BOX 678, BIXBY, OK 74008-0678
PO BOX 679, BIXBY, OK 74008-0679
PO BOX 680, BIXBY, OK 74008-0680
PO BOX 681, BIXBY, OK 74008-0681
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