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 10781, BURBANK, CA 91510-0781
PO BOX 10782, BURBANK, CA 91510-0782
PO BOX 10783, BURBANK, CA 91510-0783
PO BOX 10784, BURBANK, CA 91510-0784
PO BOX 10785, BURBANK, CA 91510-0785
PO BOX 10786, BURBANK, CA 91510-0786
PO BOX 10787, BURBANK, CA 91510-0787
PO BOX 10788, BURBANK, CA 91510-0788
PO BOX 10789, BURBANK, CA 91510-0789
PO BOX 10790, BURBANK, CA 91510-0790
PO BOX 10791, BURBANK, CA 91510-0791
PO BOX 10792, BURBANK, CA 91510-0792
PO BOX 10793, BURBANK, CA 91510-0793
PO BOX 10794, BURBANK, CA 91510-0794
PO BOX 10795, BURBANK, CA 91510-0795
PO BOX 10796, BURBANK, CA 91510-0796
PO BOX 10797, BURBANK, CA 91510-0797
PO BOX 10798, BURBANK, CA 91510-0798
PO BOX 10799, BURBANK, CA 91510-0799
PO BOX 10800, BURBANK, CA 91510-0800
PO BOX 10801, BURBANK, CA 91510-0801
PO BOX 10802, BURBANK, CA 91510-0802
PO BOX 10803, BURBANK, CA 91510-0803
PO BOX 10804, BURBANK, CA 91510-0804
PO BOX 10805, BURBANK, CA 91510-0805
PO BOX 10806, BURBANK, CA 91510-0806
PO BOX 10807, BURBANK, CA 91510-0807
PO BOX 10808, BURBANK, CA 91510-0808
PO BOX 10809, BURBANK, CA 91510-0809
PO BOX 10810, BURBANK, CA 91510-0810
PO BOX 10811, BURBANK, CA 91510-0811
PO BOX 10812, BURBANK, CA 91510-0812
PO BOX 10813, BURBANK, CA 91510-0813
PO BOX 10814, BURBANK, CA 91510-0814
PO BOX 10815, BURBANK, CA 91510-0815
PO BOX 10816, BURBANK, CA 91510-0816
PO BOX 10817, BURBANK, CA 91510-0817
PO BOX 10818, BURBANK, CA 91510-0818
PO BOX 10819, BURBANK, CA 91510-0819
PO BOX 10820, BURBANK, CA 91510-0820
PO BOX 10821, BURBANK, CA 91510-0821
PO BOX 10822, BURBANK, CA 91510-0822
PO BOX 10823, BURBANK, CA 91510-0823
PO BOX 10824, BURBANK, CA 91510-0824
PO BOX 10825, BURBANK, CA 91510-0825
PO BOX 10826, BURBANK, CA 91510-0826
PO BOX 10827, BURBANK, CA 91510-0827
PO BOX 10828, BURBANK, CA 91510-0828
PO BOX 10829, BURBANK, CA 91510-0829
PO BOX 10830, BURBANK, CA 91510-0830
PO BOX 10831, BURBANK, CA 91510-0831
PO BOX 10832, BURBANK, CA 91510-0832
PO BOX 10833, BURBANK, CA 91510-0833
PO BOX 10834, BURBANK, CA 91510-0834
PO BOX 10835, BURBANK, CA 91510-0835
PO BOX 10836, BURBANK, CA 91510-0836
PO BOX 10837, BURBANK, CA 91510-0837
PO BOX 10838, BURBANK, CA 91510-0838
PO BOX 10839, BURBANK, CA 91510-0839
PO BOX 10840, BURBANK, CA 91510-0840
PO BOX 10841, BURBANK, CA 91510-0841
PO BOX 10842, BURBANK, CA 91510-0842
PO BOX 10843, BURBANK, CA 91510-0843
PO BOX 10844, BURBANK, CA 91510-0844
PO BOX 10845, BURBANK, CA 91510-0845
PO BOX 10846, BURBANK, CA 91510-0846
PO BOX 10847, BURBANK, CA 91510-0847
PO BOX 10848, BURBANK, CA 91510-0848
PO BOX 10849, BURBANK, CA 91510-0849
PO BOX 10850, BURBANK, CA 91510-0850
PO BOX 10851, BURBANK, CA 91510-0851
PO BOX 10852, BURBANK, CA 91510-0852
PO BOX 10853, BURBANK, CA 91510-0853
PO BOX 10854, BURBANK, CA 91510-0854
PO BOX 10855, BURBANK, CA 91510-0855
PO BOX 10856, BURBANK, CA 91510-0856
PO BOX 10857, BURBANK, CA 91510-0857
PO BOX 10858, BURBANK, CA 91510-0858
PO BOX 10859, BURBANK, CA 91510-0859
PO BOX 10860, BURBANK, CA 91510-0860
PO BOX 10861, BURBANK, CA 91510-0861
PO BOX 10862, BURBANK, CA 91510-0862
PO BOX 10863, BURBANK, CA 91510-0863
PO BOX 10864, BURBANK, CA 91510-0864
PO BOX 10865, BURBANK, CA 91510-0865
PO BOX 10866, BURBANK, CA 91510-0866
PO BOX 10867, BURBANK, CA 91510-0867
PO BOX 10868, BURBANK, CA 91510-0868
PO BOX 10869, BURBANK, CA 91510-0869
PO BOX 10870, BURBANK, CA 91510-0870
PO BOX 10871, BURBANK, CA 91510-0871
PO BOX 10872, BURBANK, CA 91510-0872
PO BOX 10873, BURBANK, CA 91510-0873
PO BOX 10874, BURBANK, CA 91510-0874
PO BOX 10875, BURBANK, CA 91510-0875
PO BOX 10876, BURBANK, CA 91510-0876
PO BOX 10877, BURBANK, CA 91510-0877
PO BOX 10878, BURBANK, CA 91510-0878
PO BOX 10879, BURBANK, CA 91510-0879
PO BOX 10880, BURBANK, CA 91510-0880
PO BOX 10881, BURBANK, CA 91510-0881
PO BOX 10882, BURBANK, CA 91510-0882
PO BOX 10883, BURBANK, CA 91510-0883
PO BOX 10884, BURBANK, CA 91510-0884
PO BOX 10885, BURBANK, CA 91510-0885
PO BOX 10886, BURBANK, CA 91510-0886
PO BOX 10887, BURBANK, CA 91510-0887
PO BOX 10888, BURBANK, CA 91510-0888
PO BOX 10889, BURBANK, CA 91510-0889
PO BOX 10890, BURBANK, CA 91510-0890
PO BOX 10891, BURBANK, CA 91510-0891
PO BOX 10892, BURBANK, CA 91510-0892
PO BOX 10893, BURBANK, CA 91510-0893
PO BOX 10894, BURBANK, CA 91510-0894
PO BOX 10895, BURBANK, CA 91510-0895
PO BOX 10896, BURBANK, CA 91510-0896
PO BOX 10897, BURBANK, CA 91510-0897
PO BOX 10898, BURBANK, CA 91510-0898
PO BOX 10899, BURBANK, CA 91510-0899
PO BOX 10900, BURBANK, CA 91510-0900
PO BOX 10901, BURBANK, CA 91510-0901
PO BOX 10902, BURBANK, CA 91510-0902
PO BOX 10903, BURBANK, CA 91510-0903
PO BOX 10904, BURBANK, CA 91510-0904
PO BOX 10905, BURBANK, CA 91510-0905
PO BOX 10906, BURBANK, CA 91510-0906
PO BOX 10907, BURBANK, CA 91510-0907
PO BOX 10908, BURBANK, CA 91510-0908
PO BOX 10909, BURBANK, CA 91510-0909
PO BOX 10910, BURBANK, CA 91510-0910
PO BOX 10911, BURBANK, CA 91510-0911
PO BOX 10912, BURBANK, CA 91510-0912
PO BOX 10913, BURBANK, CA 91510-0913
PO BOX 10914, BURBANK, CA 91510-0914
PO BOX 10915, BURBANK, CA 91510-0915
PO BOX 10916, BURBANK, CA 91510-0916
PO BOX 10917, BURBANK, CA 91510-0917
PO BOX 10918, BURBANK, CA 91510-0918
PO BOX 10919, BURBANK, CA 91510-0919
PO BOX 10920, BURBANK, CA 91510-0920
PO BOX 10921, BURBANK, CA 91510-0921
PO BOX 10922, BURBANK, CA 91510-0922
PO BOX 10923, BURBANK, CA 91510-0923
PO BOX 10924, BURBANK, CA 91510-0924
PO BOX 10925, BURBANK, CA 91510-0925
PO BOX 10926, BURBANK, CA 91510-0926
PO BOX 10927, BURBANK, CA 91510-0927
PO BOX 10928, BURBANK, CA 91510-0928
PO BOX 10929, BURBANK, CA 91510-0929
PO BOX 10930, BURBANK, CA 91510-0930
PO BOX 10931, BURBANK, CA 91510-0931
PO BOX 10932, BURBANK, CA 91510-0932
PO BOX 10933, BURBANK, CA 91510-0933
PO BOX 10934, BURBANK, CA 91510-0934
PO BOX 10935, BURBANK, CA 91510-0935
PO BOX 10936, BURBANK, CA 91510-0936
PO BOX 10937, BURBANK, CA 91510-0937
PO BOX 10938, BURBANK, CA 91510-0938
PO BOX 10939, BURBANK, CA 91510-0939
PO BOX 10940, BURBANK, CA 91510-0940
PO BOX 10941, BURBANK, CA 91510-0941
PO BOX 10942, BURBANK, CA 91510-0942
PO BOX 10943, BURBANK, CA 91510-0943
PO BOX 10944, BURBANK, CA 91510-0944
PO BOX 10945, BURBANK, CA 91510-0945
PO BOX 10946, BURBANK, CA 91510-0946
PO BOX 10947, BURBANK, CA 91510-0947
PO BOX 10948, BURBANK, CA 91510-0948
PO BOX 10949, BURBANK, CA 91510-0949
PO BOX 10950, BURBANK, CA 91510-0950
PO BOX 10951, BURBANK, CA 91510-0951
PO BOX 10952, BURBANK, CA 91510-0952
PO BOX 10953, BURBANK, CA 91510-0953
PO BOX 10954, BURBANK, CA 91510-0954
PO BOX 10955, BURBANK, CA 91510-0955
PO BOX 10956, BURBANK, CA 91510-0956
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