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 721, VISALIA, CA 93279-0721
PO BOX 722, VISALIA, CA 93279-0722
PO BOX 723, VISALIA, CA 93279-0723
PO BOX 724, VISALIA, CA 93279-0724
PO BOX 725, VISALIA, CA 93279-0725
PO BOX 726, VISALIA, CA 93279-0726
PO BOX 727, VISALIA, CA 93279-0727
PO BOX 728, VISALIA, CA 93279-0728
PO BOX 729, VISALIA, CA 93279-0729
PO BOX 730, VISALIA, CA 93279-0730
PO BOX 731, VISALIA, CA 93279-0731
PO BOX 732, VISALIA, CA 93279-0732
PO BOX 733, VISALIA, CA 93279-0733
PO BOX 734, VISALIA, CA 93279-0734
PO BOX 735, VISALIA, CA 93279-0735
PO BOX 736, VISALIA, CA 93279-0736
PO BOX 737, VISALIA, CA 93279-0737
PO BOX 738, VISALIA, CA 93279-0738
PO BOX 739, VISALIA, CA 93279-0739
PO BOX 740, VISALIA, CA 93279-0740
PO BOX 741, VISALIA, CA 93279-0741
PO BOX 742, VISALIA, CA 93279-0742
PO BOX 743, VISALIA, CA 93279-0743
PO BOX 744, VISALIA, CA 93279-0744
PO BOX 745, VISALIA, CA 93279-0745
PO BOX 746, VISALIA, CA 93279-0746
PO BOX 747, VISALIA, CA 93279-0747
PO BOX 748, VISALIA, CA 93279-0748
PO BOX 749, VISALIA, CA 93279-0749
PO BOX 750, VISALIA, CA 93279-0750
PO BOX 751, VISALIA, CA 93279-0751
PO BOX 752, VISALIA, CA 93279-0752
PO BOX 753, VISALIA, CA 93279-0753
PO BOX 754, VISALIA, CA 93279-0754
PO BOX 755, VISALIA, CA 93279-0755
PO BOX 756, VISALIA, CA 93279-0756
PO BOX 757, VISALIA, CA 93279-0757
PO BOX 758, VISALIA, CA 93279-0758
PO BOX 759, VISALIA, CA 93279-0759
PO BOX 760, VISALIA, CA 93279-0760
PO BOX 761, VISALIA, CA 93279-0761
PO BOX 762, VISALIA, CA 93279-0762
PO BOX 763, VISALIA, CA 93279-0763
PO BOX 764, VISALIA, CA 93279-0764
PO BOX 765, VISALIA, CA 93279-0765
PO BOX 766, VISALIA, CA 93279-0766
PO BOX 767, VISALIA, CA 93279-0767
PO BOX 768, VISALIA, CA 93279-0768
PO BOX 769, VISALIA, CA 93279-0769
PO BOX 770, VISALIA, CA 93279-0770
PO BOX 771, VISALIA, CA 93279-0771
PO BOX 772, VISALIA, CA 93279-0772
PO BOX 773, VISALIA, CA 93279-0773
PO BOX 774, VISALIA, CA 93279-0774
PO BOX 775, VISALIA, CA 93279-0775
PO BOX 776, VISALIA, CA 93279-0776
PO BOX 777, VISALIA, CA 93279-0777
PO BOX 778, VISALIA, CA 93279-0778
PO BOX 779, VISALIA, CA 93279-0779
PO BOX 780, VISALIA, CA 93279-0780
PO BOX 781, VISALIA, CA 93279-0781
PO BOX 782, VISALIA, CA 93279-0782
PO BOX 783, VISALIA, CA 93279-0783
PO BOX 784, VISALIA, CA 93279-0784
PO BOX 785, VISALIA, CA 93279-0785
PO BOX 786, VISALIA, CA 93279-0786
PO BOX 787, VISALIA, CA 93279-0787
PO BOX 788, VISALIA, CA 93279-0788
PO BOX 789, VISALIA, CA 93279-0789
PO BOX 790, VISALIA, CA 93279-0790
PO BOX 791, VISALIA, CA 93279-0791
PO BOX 792, VISALIA, CA 93279-0792
PO BOX 793, VISALIA, CA 93279-0793
PO BOX 794, VISALIA, CA 93279-0794
PO BOX 795, VISALIA, CA 93279-0795
PO BOX 796, VISALIA, CA 93279-0796
PO BOX 797, VISALIA, CA 93279-0797
PO BOX 798, VISALIA, CA 93279-0798
PO BOX 799, VISALIA, CA 93279-0799
PO BOX 800, VISALIA, CA 93279-0800
PO BOX 801, VISALIA, CA 93279-0801
PO BOX 802, VISALIA, CA 93279-0802
PO BOX 803, VISALIA, CA 93279-0803
PO BOX 804, VISALIA, CA 93279-0804
PO BOX 805, VISALIA, CA 93279-0805
PO BOX 806, VISALIA, CA 93279-0806
PO BOX 807, VISALIA, CA 93279-0807
PO BOX 808, VISALIA, CA 93279-0808
PO BOX 809, VISALIA, CA 93279-0809
PO BOX 810, VISALIA, CA 93279-0810
PO BOX 811, VISALIA, CA 93279-0811
PO BOX 812, VISALIA, CA 93279-0812
PO BOX 813, VISALIA, CA 93279-0813
PO BOX 814, VISALIA, CA 93279-0814
PO BOX 815, VISALIA, CA 93279-0815
PO BOX 816, VISALIA, CA 93279-0816
PO BOX 817, VISALIA, CA 93279-0817
PO BOX 818, VISALIA, CA 93279-0818
PO BOX 819, VISALIA, CA 93279-0819
PO BOX 820, VISALIA, CA 93279-0820
PO BOX 821, VISALIA, CA 93279-0821
PO BOX 822, VISALIA, CA 93279-0822
PO BOX 823, VISALIA, CA 93279-0823
PO BOX 824, VISALIA, CA 93279-0824
PO BOX 825, VISALIA, CA 93279-0825
PO BOX 826, VISALIA, CA 93279-0826
PO BOX 827, VISALIA, CA 93279-0827
PO BOX 828, VISALIA, CA 93279-0828
PO BOX 829, VISALIA, CA 93279-0829
PO BOX 830, VISALIA, CA 93279-0830
PO BOX 831, VISALIA, CA 93279-0831
PO BOX 832, VISALIA, CA 93279-0832
PO BOX 833, VISALIA, CA 93279-0833
PO BOX 834, VISALIA, CA 93279-0834
PO BOX 835, VISALIA, CA 93279-0835
PO BOX 836, VISALIA, CA 93279-0836
PO BOX 837, VISALIA, CA 93279-0837
PO BOX 838, VISALIA, CA 93279-0838
PO BOX 839, VISALIA, CA 93279-0839
PO BOX 840, VISALIA, CA 93279-0840
PO BOX 841, VISALIA, CA 93279-0841
PO BOX 842, VISALIA, CA 93279-0842
PO BOX 843, VISALIA, CA 93279-0843
PO BOX 844, VISALIA, CA 93279-0844
PO BOX 845, VISALIA, CA 93279-0845
PO BOX 846, VISALIA, CA 93279-0846
PO BOX 847, VISALIA, CA 93279-0847
PO BOX 848, VISALIA, CA 93279-0848
PO BOX 849, VISALIA, CA 93279-0849
PO BOX 850, VISALIA, CA 93279-0850
PO BOX 851, VISALIA, CA 93279-0851
PO BOX 852, VISALIA, CA 93279-0852
PO BOX 853, VISALIA, CA 93279-0853
PO BOX 854, VISALIA, CA 93279-0854
PO BOX 855, VISALIA, CA 93279-0855
PO BOX 856, VISALIA, CA 93279-0856
PO BOX 857, VISALIA, CA 93279-0857
PO BOX 858, VISALIA, CA 93279-0858
PO BOX 859, VISALIA, CA 93279-0859
PO BOX 860, VISALIA, CA 93279-0860
PO BOX 861, VISALIA, CA 93279-0861
PO BOX 862, VISALIA, CA 93279-0862
PO BOX 863, VISALIA, CA 93279-0863
PO BOX 864, VISALIA, CA 93279-0864
PO BOX 865, VISALIA, CA 93279-0865
PO BOX 866, VISALIA, CA 93279-0866
PO BOX 867, VISALIA, CA 93279-0867
PO BOX 868, VISALIA, CA 93279-0868
PO BOX 869, VISALIA, CA 93279-0869
PO BOX 870, VISALIA, CA 93279-0870
PO BOX 871, VISALIA, CA 93279-0871
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