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 601, KNIGHTS LANDING, CA 95645-0601
PO BOX 602, KNIGHTS LANDING, CA 95645-0602
PO BOX 603, KNIGHTS LANDING, CA 95645-0603
PO BOX 604, KNIGHTS LANDING, CA 95645-0604
PO BOX 605, KNIGHTS LANDING, CA 95645-0605
PO BOX 606, KNIGHTS LANDING, CA 95645-0606
PO BOX 607, KNIGHTS LANDING, CA 95645-0607
PO BOX 608, KNIGHTS LANDING, CA 95645-0608
PO BOX 609, KNIGHTS LANDING, CA 95645-0609
PO BOX 610, KNIGHTS LANDING, CA 95645-0610
PO BOX 611, KNIGHTS LANDING, CA 95645-0611
PO BOX 612, KNIGHTS LANDING, CA 95645-0612
PO BOX 613, KNIGHTS LANDING, CA 95645-0613
PO BOX 614, KNIGHTS LANDING, CA 95645-0614
PO BOX 615, KNIGHTS LANDING, CA 95645-0615
PO BOX 616, KNIGHTS LANDING, CA 95645-0616
PO BOX 617, KNIGHTS LANDING, CA 95645-0617
PO BOX 618, KNIGHTS LANDING, CA 95645-0618
PO BOX 619, KNIGHTS LANDING, CA 95645-0619
PO BOX 620, KNIGHTS LANDING, CA 95645-0620
PO BOX 621, KNIGHTS LANDING, CA 95645-0621
PO BOX 622, KNIGHTS LANDING, CA 95645-0622
PO BOX 623, KNIGHTS LANDING, CA 95645-0623
PO BOX 624, KNIGHTS LANDING, CA 95645-0624
PO BOX 625, KNIGHTS LANDING, CA 95645-0625
PO BOX 626, KNIGHTS LANDING, CA 95645-0626
PO BOX 627, KNIGHTS LANDING, CA 95645-0627
PO BOX 628, KNIGHTS LANDING, CA 95645-0628
PO BOX 629, KNIGHTS LANDING, CA 95645-0629
PO BOX 630, KNIGHTS LANDING, CA 95645-0630
PO BOX 631, KNIGHTS LANDING, CA 95645-0631
PO BOX 632, KNIGHTS LANDING, CA 95645-0632
PO BOX 633, KNIGHTS LANDING, CA 95645-0633
PO BOX 634, KNIGHTS LANDING, CA 95645-0634
PO BOX 635, KNIGHTS LANDING, CA 95645-0635
PO BOX 636, KNIGHTS LANDING, CA 95645-0636
PO BOX 637, KNIGHTS LANDING, CA 95645-0637
PO BOX 638, KNIGHTS LANDING, CA 95645-0638
PO BOX 639, KNIGHTS LANDING, CA 95645-0639
PO BOX 640, KNIGHTS LANDING, CA 95645-0640
PO BOX 641, KNIGHTS LANDING, CA 95645-0641
PO BOX 642, KNIGHTS LANDING, CA 95645-0642
PO BOX 643, KNIGHTS LANDING, CA 95645-0643
PO BOX 644, KNIGHTS LANDING, CA 95645-0644
PO BOX 645, KNIGHTS LANDING, CA 95645-0645
PO BOX 646, KNIGHTS LANDING, CA 95645-0646
PO BOX 647, KNIGHTS LANDING, CA 95645-0647
PO BOX 648, KNIGHTS LANDING, CA 95645-0648
PO BOX 649, KNIGHTS LANDING, CA 95645-0649
PO BOX 650, KNIGHTS LANDING, CA 95645-0650
PO BOX 651, KNIGHTS LANDING, CA 95645-0651
PO BOX 652, KNIGHTS LANDING, CA 95645-0652
PO BOX 653, KNIGHTS LANDING, CA 95645-0653
PO BOX 654, KNIGHTS LANDING, CA 95645-0654
PO BOX 655, KNIGHTS LANDING, CA 95645-0655
PO BOX 656, KNIGHTS LANDING, CA 95645-0656
PO BOX 657, KNIGHTS LANDING, CA 95645-0657
PO BOX 658, KNIGHTS LANDING, CA 95645-0658
PO BOX 659, KNIGHTS LANDING, CA 95645-0659
PO BOX 660, KNIGHTS LANDING, CA 95645-0660
PO BOX 661, KNIGHTS LANDING, CA 95645-0661
PO BOX 662, KNIGHTS LANDING, CA 95645-0662
PO BOX 663, KNIGHTS LANDING, CA 95645-0663
PO BOX 664, KNIGHTS LANDING, CA 95645-0664
PO BOX 665, KNIGHTS LANDING, CA 95645-0665
PO BOX 666, KNIGHTS LANDING, CA 95645-0666
PO BOX 667, KNIGHTS LANDING, CA 95645-0667
PO BOX 668, KNIGHTS LANDING, CA 95645-0668
PO BOX 669, KNIGHTS LANDING, CA 95645-0669
PO BOX 670, KNIGHTS LANDING, CA 95645-0670
PO BOX 671, KNIGHTS LANDING, CA 95645-0671
PO BOX 672, KNIGHTS LANDING, CA 95645-0672
PO BOX 673, KNIGHTS LANDING, CA 95645-0673
PO BOX 674, KNIGHTS LANDING, CA 95645-0674
PO BOX 675, KNIGHTS LANDING, CA 95645-0675
PO BOX 676, KNIGHTS LANDING, CA 95645-0676
PO BOX 677, KNIGHTS LANDING, CA 95645-0677
PO BOX 678, KNIGHTS LANDING, CA 95645-0678
PO BOX 679, KNIGHTS LANDING, CA 95645-0679
PO BOX 680, KNIGHTS LANDING, CA 95645-0680
PO BOX 681, KNIGHTS LANDING, CA 95645-0681
PO BOX 682, KNIGHTS LANDING, CA 95645-0682
PO BOX 683, KNIGHTS LANDING, CA 95645-0683
PO BOX 684, KNIGHTS LANDING, CA 95645-0684
PO BOX 685, KNIGHTS LANDING, CA 95645-0685
PO BOX 686, KNIGHTS LANDING, CA 95645-0686
PO BOX 687, KNIGHTS LANDING, CA 95645-0687
PO BOX 688, KNIGHTS LANDING, CA 95645-0688
PO BOX 689, KNIGHTS LANDING, CA 95645-0689
PO BOX 690, KNIGHTS LANDING, CA 95645-0690
PO BOX 691, KNIGHTS LANDING, CA 95645-0691
PO BOX 692, KNIGHTS LANDING, CA 95645-0692
PO BOX 693, KNIGHTS LANDING, CA 95645-0693
PO BOX 694, KNIGHTS LANDING, CA 95645-0694
PO BOX 695, KNIGHTS LANDING, CA 95645-0695
PO BOX 696, KNIGHTS LANDING, CA 95645-0696
PO BOX 697, KNIGHTS LANDING, CA 95645-0697
PO BOX 698, KNIGHTS LANDING, CA 95645-0698
PO BOX 699, KNIGHTS LANDING, CA 95645-0699
PO BOX 700, KNIGHTS LANDING, CA 95645-0700
PO BOX 701, KNIGHTS LANDING, CA 95645-0701
PO BOX 702, KNIGHTS LANDING, CA 95645-0702
PO BOX 703, KNIGHTS LANDING, CA 95645-0703
PO BOX 704, KNIGHTS LANDING, CA 95645-0704
PO BOX 705, KNIGHTS LANDING, CA 95645-0705
PO BOX 706, KNIGHTS LANDING, CA 95645-0706
PO BOX 707, KNIGHTS LANDING, CA 95645-0707
PO BOX 708, KNIGHTS LANDING, CA 95645-0708
PO BOX 709, KNIGHTS LANDING, CA 95645-0709
PO BOX 710, KNIGHTS LANDING, CA 95645-0710
PO BOX 711, KNIGHTS LANDING, CA 95645-0711
PO BOX 712, KNIGHTS LANDING, CA 95645-0712
PO BOX 713, KNIGHTS LANDING, CA 95645-0713
PO BOX 714, KNIGHTS LANDING, CA 95645-0714
PO BOX 715, KNIGHTS LANDING, CA 95645-0715
PO BOX 716, KNIGHTS LANDING, CA 95645-0716
PO BOX 717, KNIGHTS LANDING, CA 95645-0717
PO BOX 718, KNIGHTS LANDING, CA 95645-0718
PO BOX 719, KNIGHTS LANDING, CA 95645-0719
PO BOX 720, KNIGHTS LANDING, CA 95645-0720
PO BOX 721, KNIGHTS LANDING, CA 95645-0721
PO BOX 722, KNIGHTS LANDING, CA 95645-0722
PO BOX 723, KNIGHTS LANDING, CA 95645-0723
PO BOX 724, KNIGHTS LANDING, CA 95645-0724
PO BOX 725, KNIGHTS LANDING, CA 95645-0725
PO BOX 726, KNIGHTS LANDING, CA 95645-0726
PO BOX 727, KNIGHTS LANDING, CA 95645-0727
PO BOX 728, KNIGHTS LANDING, CA 95645-0728
PO BOX 729, KNIGHTS LANDING, CA 95645-0729
PO BOX 730, KNIGHTS LANDING, CA 95645-0730
PO BOX 731, KNIGHTS LANDING, CA 95645-0731
PO BOX 732, KNIGHTS LANDING, CA 95645-0732
PO BOX 733, KNIGHTS LANDING, CA 95645-0733
PO BOX 734, KNIGHTS LANDING, CA 95645-0734
PO BOX 735, KNIGHTS LANDING, CA 95645-0735
PO BOX 736, KNIGHTS LANDING, CA 95645-0736
PO BOX 737, KNIGHTS LANDING, CA 95645-0737
PO BOX 738, KNIGHTS LANDING, CA 95645-0738
PO BOX 739, KNIGHTS LANDING, CA 95645-0739
PO BOX 740, KNIGHTS LANDING, CA 95645-0740
PO BOX 741, KNIGHTS LANDING, CA 95645-0741
PO BOX 742, KNIGHTS LANDING, CA 95645-0742
PO BOX 743, KNIGHTS LANDING, CA 95645-0743
PO BOX 744, KNIGHTS LANDING, CA 95645-0744
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