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 781, NEW YORK, NY 10163-0781
PO BOX 782, NEW YORK, NY 10163-0782
PO BOX 783, NEW YORK, NY 10163-0783
PO BOX 784, NEW YORK, NY 10163-0784
PO BOX 785, NEW YORK, NY 10163-0785
PO BOX 786, NEW YORK, NY 10163-0786
PO BOX 787, NEW YORK, NY 10163-0787
PO BOX 788, NEW YORK, NY 10163-0788
PO BOX 789, NEW YORK, NY 10163-0789
PO BOX 790, NEW YORK, NY 10163-0790
PO BOX 791, NEW YORK, NY 10163-0791
PO BOX 792, NEW YORK, NY 10163-0792
PO BOX 793, NEW YORK, NY 10163-0793
PO BOX 794, NEW YORK, NY 10163-0794
PO BOX 795, NEW YORK, NY 10163-0795
PO BOX 796, NEW YORK, NY 10163-0796
PO BOX 797, NEW YORK, NY 10163-0797
PO BOX 798, NEW YORK, NY 10163-0798
PO BOX 799, NEW YORK, NY 10163-0799
PO BOX 800, NEW YORK, NY 10163-0800
PO BOX 801, NEW YORK, NY 10163-0801
PO BOX 802, NEW YORK, NY 10163-0802
PO BOX 803, NEW YORK, NY 10163-0803
PO BOX 804, NEW YORK, NY 10163-0804
PO BOX 805, NEW YORK, NY 10163-0805
PO BOX 806, NEW YORK, NY 10163-0806
PO BOX 807, NEW YORK, NY 10163-0807
PO BOX 808, NEW YORK, NY 10163-0808
PO BOX 809, NEW YORK, NY 10163-0809
PO BOX 810, NEW YORK, NY 10163-0810
PO BOX 811, NEW YORK, NY 10163-0811
PO BOX 812, NEW YORK, NY 10163-0812
PO BOX 813, NEW YORK, NY 10163-0813
PO BOX 814, NEW YORK, NY 10163-0814
PO BOX 815, NEW YORK, NY 10163-0815
PO BOX 816, NEW YORK, NY 10163-0816
PO BOX 817, NEW YORK, NY 10163-0817
PO BOX 818, NEW YORK, NY 10163-0818
PO BOX 819, NEW YORK, NY 10163-0819
PO BOX 820, NEW YORK, NY 10163-0820
PO BOX 821, NEW YORK, NY 10163-0821
PO BOX 822, NEW YORK, NY 10163-0822
PO BOX 823, NEW YORK, NY 10163-0823
PO BOX 824, NEW YORK, NY 10163-0824
PO BOX 825, NEW YORK, NY 10163-0825
PO BOX 826, NEW YORK, NY 10163-0826
PO BOX 827, NEW YORK, NY 10163-0827
PO BOX 828, NEW YORK, NY 10163-0828
PO BOX 829, NEW YORK, NY 10163-0829
PO BOX 830, NEW YORK, NY 10163-0830
PO BOX 831, NEW YORK, NY 10163-0831
PO BOX 832, NEW YORK, NY 10163-0832
PO BOX 833, NEW YORK, NY 10163-0833
PO BOX 834, NEW YORK, NY 10163-0834
PO BOX 835, NEW YORK, NY 10163-0835
PO BOX 836, NEW YORK, NY 10163-0836
PO BOX 837, NEW YORK, NY 10163-0837
PO BOX 838, NEW YORK, NY 10163-0838
PO BOX 839, NEW YORK, NY 10163-0839
PO BOX 840, NEW YORK, NY 10163-0840
PO BOX 841, NEW YORK, NY 10163-0841
PO BOX 842, NEW YORK, NY 10163-0842
PO BOX 843, NEW YORK, NY 10163-0843
PO BOX 844, NEW YORK, NY 10163-0844
PO BOX 845, NEW YORK, NY 10163-0845
PO BOX 846, NEW YORK, NY 10163-0846
PO BOX 847, NEW YORK, NY 10163-0847
PO BOX 848, NEW YORK, NY 10163-0848
PO BOX 849, NEW YORK, NY 10163-0849
PO BOX 850, NEW YORK, NY 10163-0850
PO BOX 851, NEW YORK, NY 10163-0851
PO BOX 852, NEW YORK, NY 10163-0852
PO BOX 853, NEW YORK, NY 10163-0853
PO BOX 854, NEW YORK, NY 10163-0854
PO BOX 855, NEW YORK, NY 10163-0855
PO BOX 856, NEW YORK, NY 10163-0856
PO BOX 857, NEW YORK, NY 10163-0857
PO BOX 858, NEW YORK, NY 10163-0858
PO BOX 859, NEW YORK, NY 10163-0859
PO BOX 860, NEW YORK, NY 10163-0860
PO BOX 861, NEW YORK, NY 10163-0861
PO BOX 862, NEW YORK, NY 10163-0862
PO BOX 863, NEW YORK, NY 10163-0863
PO BOX 864, NEW YORK, NY 10163-0864
PO BOX 865, NEW YORK, NY 10163-0865
PO BOX 866, NEW YORK, NY 10163-0866
PO BOX 867, NEW YORK, NY 10163-0867
PO BOX 868, NEW YORK, NY 10163-0868
PO BOX 869, NEW YORK, NY 10163-0869
PO BOX 870, NEW YORK, NY 10163-0870
PO BOX 871, NEW YORK, NY 10163-0871
PO BOX 872, NEW YORK, NY 10163-0872
PO BOX 873, NEW YORK, NY 10163-0873
PO BOX 874, NEW YORK, NY 10163-0874
PO BOX 875, NEW YORK, NY 10163-0875
PO BOX 876, NEW YORK, NY 10163-0876
PO BOX 877, NEW YORK, NY 10163-0877
PO BOX 878, NEW YORK, NY 10163-0878
PO BOX 879, NEW YORK, NY 10163-0879
PO BOX 880, NEW YORK, NY 10163-0880
PO BOX 881, NEW YORK, NY 10163-0881
PO BOX 882, NEW YORK, NY 10163-0882
PO BOX 883, NEW YORK, NY 10163-0883
PO BOX 884, NEW YORK, NY 10163-0884
PO BOX 885, NEW YORK, NY 10163-0885
PO BOX 886, NEW YORK, NY 10163-0886
PO BOX 887, NEW YORK, NY 10163-0887
PO BOX 888, NEW YORK, NY 10163-0888
PO BOX 889, NEW YORK, NY 10163-0889
PO BOX 890, NEW YORK, NY 10163-0890
PO BOX 891, NEW YORK, NY 10163-0891
PO BOX 892, NEW YORK, NY 10163-0892
PO BOX 893, NEW YORK, NY 10163-0893
PO BOX 894, NEW YORK, NY 10163-0894
PO BOX 895, NEW YORK, NY 10163-0895
PO BOX 896, NEW YORK, NY 10163-0896
PO BOX 897, NEW YORK, NY 10163-0897
PO BOX 898, NEW YORK, NY 10163-0898
PO BOX 899, NEW YORK, NY 10163-0899
PO BOX 900, NEW YORK, NY 10163-0900
PO BOX 901, NEW YORK, NY 10163-0901
PO BOX 902, NEW YORK, NY 10163-0902
PO BOX 903, NEW YORK, NY 10163-0903
PO BOX 904, NEW YORK, NY 10163-0904
PO BOX 905, NEW YORK, NY 10163-0905
PO BOX 906, NEW YORK, NY 10163-0906
PO BOX 907, NEW YORK, NY 10163-0907
PO BOX 908, NEW YORK, NY 10163-0908
PO BOX 909, NEW YORK, NY 10163-0909
PO BOX 910, NEW YORK, NY 10163-0910
PO BOX 911, NEW YORK, NY 10163-0911
PO BOX 912, NEW YORK, NY 10163-0912
PO BOX 913, NEW YORK, NY 10163-0913
PO BOX 914, NEW YORK, NY 10163-0914
PO BOX 915, NEW YORK, NY 10163-0915
PO BOX 916, NEW YORK, NY 10163-0916
PO BOX 917, NEW YORK, NY 10163-0917
PO BOX 918, NEW YORK, NY 10163-0918
PO BOX 919, NEW YORK, NY 10163-0919
PO BOX 920, NEW YORK, NY 10163-0920
PO BOX 921, NEW YORK, NY 10163-0921
PO BOX 922, NEW YORK, NY 10163-0922
PO BOX 923, NEW YORK, NY 10163-0923
PO BOX 924, NEW YORK, NY 10163-0924
PO BOX 925, NEW YORK, NY 10163-0925
PO BOX 926, NEW YORK, NY 10163-0926
PO BOX 927, NEW YORK, NY 10163-0927
PO BOX 928, NEW YORK, NY 10163-0928
PO BOX 929, NEW YORK, NY 10163-0929
PO BOX 930, NEW YORK, NY 10163-0930
PO BOX 931, NEW YORK, NY 10163-0931
PO BOX 932, NEW YORK, NY 10163-0932
PO BOX 933, NEW YORK, NY 10163-0933
PO BOX 934, NEW YORK, NY 10163-0934
PO BOX 935, NEW YORK, NY 10163-0935
PO BOX 936, NEW YORK, NY 10163-0936
PO BOX 937, NEW YORK, NY 10163-0937
PO BOX 938, NEW YORK, NY 10163-0938
PO BOX 939, NEW YORK, NY 10163-0939
PO BOX 940, NEW YORK, NY 10163-0940
PO BOX 941, NEW YORK, NY 10163-0941
PO BOX 942, NEW YORK, NY 10163-0942
PO BOX 943, NEW YORK, NY 10163-0943
PO BOX 944, NEW YORK, NY 10163-0944
PO BOX 945, NEW YORK, NY 10163-0945
PO BOX 946, NEW YORK, NY 10163-0946
PO BOX 947, NEW YORK, NY 10163-0947
PO BOX 948, NEW YORK, NY 10163-0948
PO BOX 949, NEW YORK, NY 10163-0949
PO BOX 950, NEW YORK, NY 10163-0950
PO BOX 951, NEW YORK, NY 10163-0951
PO BOX 952, NEW YORK, NY 10163-0952
PO BOX 953, NEW YORK, NY 10163-0953
PO BOX 954, NEW YORK, NY 10163-0954
PO BOX 955, NEW YORK, NY 10163-0955
PO BOX 956, NEW YORK, NY 10163-0956
PO BOX 957, NEW YORK, NY 10163-0957
PO BOX 958, NEW YORK, NY 10163-0958
PO BOX 959, NEW YORK, NY 10163-0959
PO BOX 960, NEW YORK, NY 10163-0960
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