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, LA JOLLA, CA 92038-0601
PO BOX 602, LA JOLLA, CA 92038-0602
PO BOX 603, LA JOLLA, CA 92038-0603
PO BOX 604, LA JOLLA, CA 92038-0604
PO BOX 605, LA JOLLA, CA 92038-0605
PO BOX 606, LA JOLLA, CA 92038-0606
PO BOX 607, LA JOLLA, CA 92038-0607
PO BOX 608, LA JOLLA, CA 92038-0608
PO BOX 609, LA JOLLA, CA 92038-0609
PO BOX 610, LA JOLLA, CA 92038-0610
PO BOX 611, LA JOLLA, CA 92038-0611
PO BOX 612, LA JOLLA, CA 92038-0612
PO BOX 613, LA JOLLA, CA 92038-0613
PO BOX 614, LA JOLLA, CA 92038-0614
PO BOX 615, LA JOLLA, CA 92038-0615
PO BOX 616, LA JOLLA, CA 92038-0616
PO BOX 617, LA JOLLA, CA 92038-0617
PO BOX 618, LA JOLLA, CA 92038-0618
PO BOX 619, LA JOLLA, CA 92038-0619
PO BOX 620, LA JOLLA, CA 92038-0620
PO BOX 621, LA JOLLA, CA 92038-0621
PO BOX 622, LA JOLLA, CA 92038-0622
PO BOX 623, LA JOLLA, CA 92038-0623
PO BOX 624, LA JOLLA, CA 92038-0624
PO BOX 625, LA JOLLA, CA 92038-0625
PO BOX 626, LA JOLLA, CA 92038-0626
PO BOX 627, LA JOLLA, CA 92038-0627
PO BOX 628, LA JOLLA, CA 92038-0628
PO BOX 629, LA JOLLA, CA 92038-0629
PO BOX 630, LA JOLLA, CA 92038-0630
PO BOX 631, LA JOLLA, CA 92038-0631
PO BOX 632, LA JOLLA, CA 92038-0632
PO BOX 633, LA JOLLA, CA 92038-0633
PO BOX 634, LA JOLLA, CA 92038-0634
PO BOX 635, LA JOLLA, CA 92038-0635
PO BOX 636, LA JOLLA, CA 92038-0636
PO BOX 637, LA JOLLA, CA 92038-0637
PO BOX 638, LA JOLLA, CA 92038-0638
PO BOX 639, LA JOLLA, CA 92038-0639
PO BOX 640, LA JOLLA, CA 92038-0640
PO BOX 641, LA JOLLA, CA 92038-0641
PO BOX 642, LA JOLLA, CA 92038-0642
PO BOX 643, LA JOLLA, CA 92038-0643
PO BOX 644, LA JOLLA, CA 92038-0644
PO BOX 645, LA JOLLA, CA 92038-0645
PO BOX 646, LA JOLLA, CA 92038-0646
PO BOX 647, LA JOLLA, CA 92038-0647
PO BOX 648, LA JOLLA, CA 92038-0648
PO BOX 649, LA JOLLA, CA 92038-0649
PO BOX 650, LA JOLLA, CA 92038-0650
PO BOX 651, LA JOLLA, CA 92038-0651
PO BOX 652, LA JOLLA, CA 92038-0652
PO BOX 653, LA JOLLA, CA 92038-0653
PO BOX 654, LA JOLLA, CA 92038-0654
PO BOX 655, LA JOLLA, CA 92038-0655
PO BOX 656, LA JOLLA, CA 92038-0656
PO BOX 657, LA JOLLA, CA 92038-0657
PO BOX 658, LA JOLLA, CA 92038-0658
PO BOX 659, LA JOLLA, CA 92038-0659
PO BOX 660, LA JOLLA, CA 92038-0660
PO BOX 661, LA JOLLA, CA 92038-0661
PO BOX 662, LA JOLLA, CA 92038-0662
PO BOX 663, LA JOLLA, CA 92038-0663
PO BOX 664, LA JOLLA, CA 92038-0664
PO BOX 665, LA JOLLA, CA 92038-0665
PO BOX 666, LA JOLLA, CA 92038-0666
PO BOX 667, LA JOLLA, CA 92038-0667
PO BOX 668, LA JOLLA, CA 92038-0668
PO BOX 669, LA JOLLA, CA 92038-0669
PO BOX 670, LA JOLLA, CA 92038-0670
PO BOX 671, LA JOLLA, CA 92038-0671
PO BOX 672, LA JOLLA, CA 92038-0672
PO BOX 673, LA JOLLA, CA 92038-0673
PO BOX 674, LA JOLLA, CA 92038-0674
PO BOX 675, LA JOLLA, CA 92038-0675
PO BOX 676, LA JOLLA, CA 92038-0676
PO BOX 677, LA JOLLA, CA 92038-0677
PO BOX 678, LA JOLLA, CA 92038-0678
PO BOX 679, LA JOLLA, CA 92038-0679
PO BOX 680, LA JOLLA, CA 92038-0680
PO BOX 681, LA JOLLA, CA 92038-0681
PO BOX 682, LA JOLLA, CA 92038-0682
PO BOX 683, LA JOLLA, CA 92038-0683
PO BOX 684, LA JOLLA, CA 92038-0684
PO BOX 685, LA JOLLA, CA 92038-0685
PO BOX 686, LA JOLLA, CA 92038-0686
PO BOX 687, LA JOLLA, CA 92038-0687
PO BOX 688, LA JOLLA, CA 92038-0688
PO BOX 689, LA JOLLA, CA 92038-0689
PO BOX 690, LA JOLLA, CA 92038-0690
PO BOX 691, LA JOLLA, CA 92038-0691
PO BOX 692, LA JOLLA, CA 92038-0692
PO BOX 693, LA JOLLA, CA 92038-0693
PO BOX 694, LA JOLLA, CA 92038-0694
PO BOX 695, LA JOLLA, CA 92038-0695
PO BOX 696, LA JOLLA, CA 92038-0696
PO BOX 697, LA JOLLA, CA 92038-0697
PO BOX 698, LA JOLLA, CA 92038-0698
PO BOX 699, LA JOLLA, CA 92038-0699
PO BOX 700, LA JOLLA, CA 92038-0700
PO BOX 701, LA JOLLA, CA 92038-0701
PO BOX 702, LA JOLLA, CA 92038-0702
PO BOX 703, LA JOLLA, CA 92038-0703
PO BOX 704, LA JOLLA, CA 92038-0704
PO BOX 705, LA JOLLA, CA 92038-0705
PO BOX 706, LA JOLLA, CA 92038-0706
PO BOX 707, LA JOLLA, CA 92038-0707
PO BOX 708, LA JOLLA, CA 92038-0708
PO BOX 709, LA JOLLA, CA 92038-0709
PO BOX 710, LA JOLLA, CA 92038-0710
PO BOX 711, LA JOLLA, CA 92038-0711
PO BOX 712, LA JOLLA, CA 92038-0712
PO BOX 713, LA JOLLA, CA 92038-0713
PO BOX 714, LA JOLLA, CA 92038-0714
PO BOX 715, LA JOLLA, CA 92038-0715
PO BOX 716, LA JOLLA, CA 92038-0716
PO BOX 717, LA JOLLA, CA 92038-0717
PO BOX 718, LA JOLLA, CA 92038-0718
PO BOX 719, LA JOLLA, CA 92038-0719
PO BOX 720, LA JOLLA, CA 92038-0720
PO BOX 721, LA JOLLA, CA 92038-0721
PO BOX 722, LA JOLLA, CA 92038-0722
PO BOX 723, LA JOLLA, CA 92038-0723
PO BOX 724, LA JOLLA, CA 92038-0724
PO BOX 725, LA JOLLA, CA 92038-0725
PO BOX 726, LA JOLLA, CA 92038-0726
PO BOX 727, LA JOLLA, CA 92038-0727
PO BOX 728, LA JOLLA, CA 92038-0728
PO BOX 729, LA JOLLA, CA 92038-0729
PO BOX 730, LA JOLLA, CA 92038-0730
PO BOX 731, LA JOLLA, CA 92038-0731
PO BOX 732, LA JOLLA, CA 92038-0732
PO BOX 733, LA JOLLA, CA 92038-0733
PO BOX 734, LA JOLLA, CA 92038-0734
PO BOX 735, LA JOLLA, CA 92038-0735
PO BOX 736, LA JOLLA, CA 92038-0736
PO BOX 737, LA JOLLA, CA 92038-0737
PO BOX 738, LA JOLLA, CA 92038-0738
PO BOX 739, LA JOLLA, CA 92038-0739
PO BOX 740, LA JOLLA, CA 92038-0740
PO BOX 741, LA JOLLA, CA 92038-0741
PO BOX 742, LA JOLLA, CA 92038-0742
PO BOX 743, LA JOLLA, CA 92038-0743
PO BOX 744, LA JOLLA, CA 92038-0744
PO BOX 745, LA JOLLA, CA 92038-0745
PO BOX 746, LA JOLLA, CA 92038-0746
PO BOX 747, LA JOLLA, CA 92038-0747
PO BOX 748, LA JOLLA, CA 92038-0748
PO BOX 749, LA JOLLA, CA 92038-0749
PO BOX 750, LA JOLLA, CA 92038-0750
PO BOX 751, LA JOLLA, CA 92038-0751
PO BOX 752, LA JOLLA, CA 92038-0752
PO BOX 753, LA JOLLA, CA 92038-0753
PO BOX 754, LA JOLLA, CA 92038-0754
PO BOX 755, LA JOLLA, CA 92038-0755
PO BOX 756, LA JOLLA, CA 92038-0756
PO BOX 757, LA JOLLA, CA 92038-0757
PO BOX 758, LA JOLLA, CA 92038-0758
PO BOX 759, LA JOLLA, CA 92038-0759
PO BOX 760, LA JOLLA, CA 92038-0760
PO BOX 761, LA JOLLA, CA 92038-0761
PO BOX 762, LA JOLLA, CA 92038-0762
PO BOX 763, LA JOLLA, CA 92038-0763
PO BOX 764, LA JOLLA, CA 92038-0764
PO BOX 765, LA JOLLA, CA 92038-0765
PO BOX 766, LA JOLLA, CA 92038-0766
PO BOX 767, LA JOLLA, CA 92038-0767
PO BOX 768, LA JOLLA, CA 92038-0768
PO BOX 769, LA JOLLA, CA 92038-0769
PO BOX 770, LA JOLLA, CA 92038-0770
PO BOX 771, LA JOLLA, CA 92038-0771
PO BOX 772, LA JOLLA, CA 92038-0772
PO BOX 773, LA JOLLA, CA 92038-0773
PO BOX 774, LA JOLLA, CA 92038-0774
PO BOX 775, LA JOLLA, CA 92038-0775
PO BOX 776, LA JOLLA, CA 92038-0776
PO BOX 777, LA JOLLA, CA 92038-0777
PO BOX 778, LA JOLLA, CA 92038-0778
PO BOX 779, LA JOLLA, CA 92038-0779
PO BOX 780, LA JOLLA, CA 92038-0780
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