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 661, FALLBROOK, CA 92088-0661
PO BOX 662, FALLBROOK, CA 92088-0662
PO BOX 663, FALLBROOK, CA 92088-0663
PO BOX 664, FALLBROOK, CA 92088-0664
PO BOX 665, FALLBROOK, CA 92088-0665
PO BOX 666, FALLBROOK, CA 92088-0666
PO BOX 667, FALLBROOK, CA 92088-0667
PO BOX 668, FALLBROOK, CA 92088-0668
PO BOX 669, FALLBROOK, CA 92088-0669
PO BOX 670, FALLBROOK, CA 92088-0670
PO BOX 671, FALLBROOK, CA 92088-0671
PO BOX 672, FALLBROOK, CA 92088-0672
PO BOX 673, FALLBROOK, CA 92088-0673
PO BOX 674, FALLBROOK, CA 92088-0674
PO BOX 675, FALLBROOK, CA 92088-0675
PO BOX 676, FALLBROOK, CA 92088-0676
PO BOX 677, FALLBROOK, CA 92088-0677
PO BOX 678, FALLBROOK, CA 92088-0678
PO BOX 679, FALLBROOK, CA 92088-0679
PO BOX 680, FALLBROOK, CA 92088-0680
PO BOX 681, FALLBROOK, CA 92088-0681
PO BOX 682, FALLBROOK, CA 92088-0682
PO BOX 683, FALLBROOK, CA 92088-0683
PO BOX 684, FALLBROOK, CA 92088-0684
PO BOX 685, FALLBROOK, CA 92088-0685
PO BOX 686, FALLBROOK, CA 92088-0686
PO BOX 687, FALLBROOK, CA 92088-0687
PO BOX 688, FALLBROOK, CA 92088-0688
PO BOX 689, FALLBROOK, CA 92088-0689
PO BOX 690, FALLBROOK, CA 92088-0690
PO BOX 691, FALLBROOK, CA 92088-0691
PO BOX 692, FALLBROOK, CA 92088-0692
PO BOX 693, FALLBROOK, CA 92088-0693
PO BOX 694, FALLBROOK, CA 92088-0694
PO BOX 695, FALLBROOK, CA 92088-0695
PO BOX 696, FALLBROOK, CA 92088-0696
PO BOX 697, FALLBROOK, CA 92088-0697
PO BOX 698, FALLBROOK, CA 92088-0698
PO BOX 699, FALLBROOK, CA 92088-0699
PO BOX 700, FALLBROOK, CA 92088-0700
PO BOX 701, FALLBROOK, CA 92088-0701
PO BOX 702, FALLBROOK, CA 92088-0702
PO BOX 703, FALLBROOK, CA 92088-0703
PO BOX 704, FALLBROOK, CA 92088-0704
PO BOX 705, FALLBROOK, CA 92088-0705
PO BOX 706, FALLBROOK, CA 92088-0706
PO BOX 707, FALLBROOK, CA 92088-0707
PO BOX 708, FALLBROOK, CA 92088-0708
PO BOX 709, FALLBROOK, CA 92088-0709
PO BOX 710, FALLBROOK, CA 92088-0710
PO BOX 711, FALLBROOK, CA 92088-0711
PO BOX 712, FALLBROOK, CA 92088-0712
PO BOX 713, FALLBROOK, CA 92088-0713
PO BOX 714, FALLBROOK, CA 92088-0714
PO BOX 715, FALLBROOK, CA 92088-0715
PO BOX 716, FALLBROOK, CA 92088-0716
PO BOX 717, FALLBROOK, CA 92088-0717
PO BOX 718, FALLBROOK, CA 92088-0718
PO BOX 719, FALLBROOK, CA 92088-0719
PO BOX 720, FALLBROOK, CA 92088-0720
PO BOX 721, FALLBROOK, CA 92088-0721
PO BOX 722, FALLBROOK, CA 92088-0722
PO BOX 723, FALLBROOK, CA 92088-0723
PO BOX 724, FALLBROOK, CA 92088-0724
PO BOX 725, FALLBROOK, CA 92088-0725
PO BOX 726, FALLBROOK, CA 92088-0726
PO BOX 727, FALLBROOK, CA 92088-0727
PO BOX 728, FALLBROOK, CA 92088-0728
PO BOX 729, FALLBROOK, CA 92088-0729
PO BOX 730, FALLBROOK, CA 92088-0730
PO BOX 731, FALLBROOK, CA 92088-0731
PO BOX 732, FALLBROOK, CA 92088-0732
PO BOX 733, FALLBROOK, CA 92088-0733
PO BOX 734, FALLBROOK, CA 92088-0734
PO BOX 735, FALLBROOK, CA 92088-0735
PO BOX 736, FALLBROOK, CA 92088-0736
PO BOX 737, FALLBROOK, CA 92088-0737
PO BOX 738, FALLBROOK, CA 92088-0738
PO BOX 739, FALLBROOK, CA 92088-0739
PO BOX 740, FALLBROOK, CA 92088-0740
PO BOX 741, FALLBROOK, CA 92088-0741
PO BOX 742, FALLBROOK, CA 92088-0742
PO BOX 743, FALLBROOK, CA 92088-0743
PO BOX 744, FALLBROOK, CA 92088-0744
PO BOX 745, FALLBROOK, CA 92088-0745
PO BOX 746, FALLBROOK, CA 92088-0746
PO BOX 747, FALLBROOK, CA 92088-0747
PO BOX 748, FALLBROOK, CA 92088-0748
PO BOX 749, FALLBROOK, CA 92088-0749
PO BOX 750, FALLBROOK, CA 92088-0750
PO BOX 751, FALLBROOK, CA 92088-0751
PO BOX 752, FALLBROOK, CA 92088-0752
PO BOX 753, FALLBROOK, CA 92088-0753
PO BOX 754, FALLBROOK, CA 92088-0754
PO BOX 755, FALLBROOK, CA 92088-0755
PO BOX 756, FALLBROOK, CA 92088-0756
PO BOX 757, FALLBROOK, CA 92088-0757
PO BOX 758, FALLBROOK, CA 92088-0758
PO BOX 759, FALLBROOK, CA 92088-0759
PO BOX 760, FALLBROOK, CA 92088-0760
PO BOX 761, FALLBROOK, CA 92088-0761
PO BOX 762, FALLBROOK, CA 92088-0762
PO BOX 763, FALLBROOK, CA 92088-0763
PO BOX 764, FALLBROOK, CA 92088-0764
PO BOX 765, FALLBROOK, CA 92088-0765
PO BOX 766, FALLBROOK, CA 92088-0766
PO BOX 767, FALLBROOK, CA 92088-0767
PO BOX 768, FALLBROOK, CA 92088-0768
PO BOX 769, FALLBROOK, CA 92088-0769
PO BOX 770, FALLBROOK, CA 92088-0770
PO BOX 771, FALLBROOK, CA 92088-0771
PO BOX 772, FALLBROOK, CA 92088-0772
PO BOX 773, FALLBROOK, CA 92088-0773
PO BOX 774, FALLBROOK, CA 92088-0774
PO BOX 775, FALLBROOK, CA 92088-0775
PO BOX 776, FALLBROOK, CA 92088-0776
PO BOX 777, FALLBROOK, CA 92088-0777
PO BOX 778, FALLBROOK, CA 92088-0778
PO BOX 779, FALLBROOK, CA 92088-0779
PO BOX 780, FALLBROOK, CA 92088-0780
PO BOX 781, FALLBROOK, CA 92088-0781
PO BOX 782, FALLBROOK, CA 92088-0782
PO BOX 783, FALLBROOK, CA 92088-0783
PO BOX 784, FALLBROOK, CA 92088-0784
PO BOX 785, FALLBROOK, CA 92088-0785
PO BOX 786, FALLBROOK, CA 92088-0786
PO BOX 787, FALLBROOK, CA 92088-0787
PO BOX 788, FALLBROOK, CA 92088-0788
PO BOX 789, FALLBROOK, CA 92088-0789
PO BOX 790, FALLBROOK, CA 92088-0790
PO BOX 791, FALLBROOK, CA 92088-0791
PO BOX 792, FALLBROOK, CA 92088-0792
PO BOX 793, FALLBROOK, CA 92088-0793
PO BOX 794, FALLBROOK, CA 92088-0794
PO BOX 795, FALLBROOK, CA 92088-0795
PO BOX 796, FALLBROOK, CA 92088-0796
PO BOX 797, FALLBROOK, CA 92088-0797
PO BOX 798, FALLBROOK, CA 92088-0798
PO BOX 799, FALLBROOK, CA 92088-0799
PO BOX 800, FALLBROOK, CA 92088-0800
PO BOX 801, FALLBROOK, CA 92088-0801
PO BOX 802, FALLBROOK, CA 92088-0802
PO BOX 803, FALLBROOK, CA 92088-0803
PO BOX 804, FALLBROOK, CA 92088-0804
PO BOX 805, FALLBROOK, CA 92088-0805
PO BOX 806, FALLBROOK, CA 92088-0806
PO BOX 807, FALLBROOK, CA 92088-0807
PO BOX 808, FALLBROOK, CA 92088-0808
PO BOX 809, FALLBROOK, CA 92088-0809
PO BOX 810, FALLBROOK, CA 92088-0810
PO BOX 811, FALLBROOK, CA 92088-0811
PO BOX 812, FALLBROOK, CA 92088-0812
PO BOX 813, FALLBROOK, CA 92088-0813
PO BOX 814, FALLBROOK, CA 92088-0814
PO BOX 815, FALLBROOK, CA 92088-0815
PO BOX 816, FALLBROOK, CA 92088-0816
PO BOX 817, FALLBROOK, CA 92088-0817
PO BOX 818, FALLBROOK, CA 92088-0818
PO BOX 819, FALLBROOK, CA 92088-0819
PO BOX 820, FALLBROOK, CA 92088-0820
PO BOX 821, FALLBROOK, CA 92088-0821
PO BOX 822, FALLBROOK, CA 92088-0822
PO BOX 823, FALLBROOK, CA 92088-0823
PO BOX 824, FALLBROOK, CA 92088-0824
PO BOX 825, FALLBROOK, CA 92088-0825
PO BOX 826, FALLBROOK, CA 92088-0826
PO BOX 827, FALLBROOK, CA 92088-0827
PO BOX 828, FALLBROOK, CA 92088-0828
PO BOX 829, FALLBROOK, CA 92088-0829
PO BOX 830, FALLBROOK, CA 92088-0830
PO BOX 831, FALLBROOK, CA 92088-0831
PO BOX 832, FALLBROOK, CA 92088-0832
PO BOX 833, FALLBROOK, CA 92088-0833
PO BOX 834, FALLBROOK, CA 92088-0834
PO BOX 835, FALLBROOK, CA 92088-0835
PO BOX 836, FALLBROOK, CA 92088-0836
PO BOX 837, FALLBROOK, CA 92088-0837
PO BOX 838, FALLBROOK, CA 92088-0838
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