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 801, PLAINFIELD, NJ 07061-0801
PO BOX 802, PLAINFIELD, NJ 07061-0802
PO BOX 803, PLAINFIELD, NJ 07061-0803
PO BOX 804, PLAINFIELD, NJ 07061-0804
PO BOX 805, PLAINFIELD, NJ 07061-0805
PO BOX 806, PLAINFIELD, NJ 07061-0806
PO BOX 807, PLAINFIELD, NJ 07061-0807
PO BOX 808, PLAINFIELD, NJ 07061-0808
PO BOX 809, PLAINFIELD, NJ 07061-0809
PO BOX 810, PLAINFIELD, NJ 07061-0810
PO BOX 811, PLAINFIELD, NJ 07061-0811
PO BOX 812, PLAINFIELD, NJ 07061-0812
PO BOX 813, PLAINFIELD, NJ 07061-0813
PO BOX 814, PLAINFIELD, NJ 07061-0814
PO BOX 815, PLAINFIELD, NJ 07061-0815
PO BOX 816, PLAINFIELD, NJ 07061-0816
PO BOX 817, PLAINFIELD, NJ 07061-0817
PO BOX 818, PLAINFIELD, NJ 07061-0818
PO BOX 819, PLAINFIELD, NJ 07061-0819
PO BOX 820, PLAINFIELD, NJ 07061-0820
PO BOX 821, PLAINFIELD, NJ 07061-0821
PO BOX 822, PLAINFIELD, NJ 07061-0822
PO BOX 823, PLAINFIELD, NJ 07061-0823
PO BOX 824, PLAINFIELD, NJ 07061-0824
PO BOX 825, PLAINFIELD, NJ 07061-0825
PO BOX 826, PLAINFIELD, NJ 07061-0826
PO BOX 827, PLAINFIELD, NJ 07061-0827
PO BOX 828, PLAINFIELD, NJ 07061-0828
PO BOX 829, PLAINFIELD, NJ 07061-0829
PO BOX 830, PLAINFIELD, NJ 07061-0830
PO BOX 831, PLAINFIELD, NJ 07061-0831
PO BOX 832, PLAINFIELD, NJ 07061-0832
PO BOX 833, PLAINFIELD, NJ 07061-0833
PO BOX 834, PLAINFIELD, NJ 07061-0834
PO BOX 835, PLAINFIELD, NJ 07061-0835
PO BOX 836, PLAINFIELD, NJ 07061-0836
PO BOX 837, PLAINFIELD, NJ 07061-0837
PO BOX 838, PLAINFIELD, NJ 07061-0838
PO BOX 839, PLAINFIELD, NJ 07061-0839
PO BOX 840, PLAINFIELD, NJ 07061-0840
PO BOX 841, PLAINFIELD, NJ 07061-0841
PO BOX 842, PLAINFIELD, NJ 07061-0842
PO BOX 843, PLAINFIELD, NJ 07061-0843
PO BOX 844, PLAINFIELD, NJ 07061-0844
PO BOX 845, PLAINFIELD, NJ 07061-0845
PO BOX 846, PLAINFIELD, NJ 07061-0846
PO BOX 847, PLAINFIELD, NJ 07061-0847
PO BOX 848, PLAINFIELD, NJ 07061-0848
PO BOX 849, PLAINFIELD, NJ 07061-0849
PO BOX 850, PLAINFIELD, NJ 07061-0850
PO BOX 851, PLAINFIELD, NJ 07061-0851
PO BOX 852, PLAINFIELD, NJ 07061-0852
PO BOX 853, PLAINFIELD, NJ 07061-0853
PO BOX 854, PLAINFIELD, NJ 07061-0854
PO BOX 855, PLAINFIELD, NJ 07061-0855
PO BOX 856, PLAINFIELD, NJ 07061-0856
PO BOX 857, PLAINFIELD, NJ 07061-0857
PO BOX 858, PLAINFIELD, NJ 07061-0858
PO BOX 859, PLAINFIELD, NJ 07061-0859
PO BOX 860, PLAINFIELD, NJ 07061-0860
PO BOX 861, PLAINFIELD, NJ 07061-0861
PO BOX 862, PLAINFIELD, NJ 07061-0862
PO BOX 863, PLAINFIELD, NJ 07061-0863
PO BOX 864, PLAINFIELD, NJ 07061-0864
PO BOX 865, PLAINFIELD, NJ 07061-0865
PO BOX 866, PLAINFIELD, NJ 07061-0866
PO BOX 867, PLAINFIELD, NJ 07061-0867
PO BOX 868, PLAINFIELD, NJ 07061-0868
PO BOX 869, PLAINFIELD, NJ 07061-0869
PO BOX 870, PLAINFIELD, NJ 07061-0870
PO BOX 871, PLAINFIELD, NJ 07061-0871
PO BOX 872, PLAINFIELD, NJ 07061-0872
PO BOX 873, PLAINFIELD, NJ 07061-0873
PO BOX 874, PLAINFIELD, NJ 07061-0874
PO BOX 875, PLAINFIELD, NJ 07061-0875
PO BOX 876, PLAINFIELD, NJ 07061-0876
PO BOX 877, PLAINFIELD, NJ 07061-0877
PO BOX 878, PLAINFIELD, NJ 07061-0878
PO BOX 879, PLAINFIELD, NJ 07061-0879
PO BOX 880, PLAINFIELD, NJ 07061-0880
PO BOX 881, PLAINFIELD, NJ 07061-0881
PO BOX 882, PLAINFIELD, NJ 07061-0882
PO BOX 883, PLAINFIELD, NJ 07061-0883
PO BOX 884, PLAINFIELD, NJ 07061-0884
PO BOX 885, PLAINFIELD, NJ 07061-0885
PO BOX 886, PLAINFIELD, NJ 07061-0886
PO BOX 887, PLAINFIELD, NJ 07061-0887
PO BOX 888, PLAINFIELD, NJ 07061-0888
PO BOX 889, PLAINFIELD, NJ 07061-0889
PO BOX 890, PLAINFIELD, NJ 07061-0890
PO BOX 891, PLAINFIELD, NJ 07061-0891
PO BOX 892, PLAINFIELD, NJ 07061-0892
PO BOX 893, PLAINFIELD, NJ 07061-0893
PO BOX 894, PLAINFIELD, NJ 07061-0894
PO BOX 895, PLAINFIELD, NJ 07061-0895
PO BOX 896, PLAINFIELD, NJ 07061-0896
PO BOX 897, PLAINFIELD, NJ 07061-0897
PO BOX 898, PLAINFIELD, NJ 07061-0898
PO BOX 899, PLAINFIELD, NJ 07061-0899
PO BOX 900, PLAINFIELD, NJ 07061-0900
PO BOX 901, PLAINFIELD, NJ 07061-0901
PO BOX 902, PLAINFIELD, NJ 07061-0902
PO BOX 903, PLAINFIELD, NJ 07061-0903
PO BOX 904, PLAINFIELD, NJ 07061-0904
PO BOX 905, PLAINFIELD, NJ 07061-0905
PO BOX 906, PLAINFIELD, NJ 07061-0906
PO BOX 907, PLAINFIELD, NJ 07061-0907
PO BOX 908, PLAINFIELD, NJ 07061-0908
PO BOX 909, PLAINFIELD, NJ 07061-0909
PO BOX 910, PLAINFIELD, NJ 07061-0910
PO BOX 911, PLAINFIELD, NJ 07061-0911
PO BOX 912, PLAINFIELD, NJ 07061-0912
PO BOX 913, PLAINFIELD, NJ 07061-0913
PO BOX 914, PLAINFIELD, NJ 07061-0914
PO BOX 915, PLAINFIELD, NJ 07061-0915
PO BOX 916, PLAINFIELD, NJ 07061-0916
PO BOX 917, PLAINFIELD, NJ 07061-0917
PO BOX 918, PLAINFIELD, NJ 07061-0918
PO BOX 919, PLAINFIELD, NJ 07061-0919
PO BOX 920, PLAINFIELD, NJ 07061-0920
PO BOX 921, PLAINFIELD, NJ 07061-0921
PO BOX 922, PLAINFIELD, NJ 07061-0922
PO BOX 923, PLAINFIELD, NJ 07061-0923
PO BOX 924, PLAINFIELD, NJ 07061-0924
PO BOX 925, PLAINFIELD, NJ 07061-0925
PO BOX 926, PLAINFIELD, NJ 07061-0926
PO BOX 927, PLAINFIELD, NJ 07061-0927
PO BOX 928, PLAINFIELD, NJ 07061-0928
PO BOX 929, PLAINFIELD, NJ 07061-0929
PO BOX 930, PLAINFIELD, NJ 07061-0930
PO BOX 931, PLAINFIELD, NJ 07061-0931
PO BOX 932, PLAINFIELD, NJ 07061-0932
PO BOX 933, PLAINFIELD, NJ 07061-0933
PO BOX 934, PLAINFIELD, NJ 07061-0934
PO BOX 935, PLAINFIELD, NJ 07061-0935
PO BOX 936, PLAINFIELD, NJ 07061-0936
PO BOX 937, PLAINFIELD, NJ 07061-0937
PO BOX 938, PLAINFIELD, NJ 07061-0938
PO BOX 939, PLAINFIELD, NJ 07061-0939
PO BOX 940, PLAINFIELD, NJ 07061-0940
PO BOX 941, PLAINFIELD, NJ 07061-0941
PO BOX 942, PLAINFIELD, NJ 07061-0942
PO BOX 943, PLAINFIELD, NJ 07061-0943
PO BOX 944, PLAINFIELD, NJ 07061-0944
PO BOX 945, PLAINFIELD, NJ 07061-0945
PO BOX 946, PLAINFIELD, NJ 07061-0946
PO BOX 947, PLAINFIELD, NJ 07061-0947
PO BOX 948, PLAINFIELD, NJ 07061-0948
PO BOX 949, PLAINFIELD, NJ 07061-0949
PO BOX 950, PLAINFIELD, NJ 07061-0950
PO BOX 951, PLAINFIELD, NJ 07061-0951
PO BOX 952, PLAINFIELD, NJ 07061-0952
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