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, ROCKINGHAM, NC 28380-0781
PO BOX 782, ROCKINGHAM, NC 28380-0782
PO BOX 783, ROCKINGHAM, NC 28380-0783
PO BOX 784, ROCKINGHAM, NC 28380-0784
PO BOX 785, ROCKINGHAM, NC 28380-0785
PO BOX 786, ROCKINGHAM, NC 28380-0786
PO BOX 787, ROCKINGHAM, NC 28380-0787
PO BOX 788, ROCKINGHAM, NC 28380-0788
PO BOX 789, ROCKINGHAM, NC 28380-0789
PO BOX 790, ROCKINGHAM, NC 28380-0790
PO BOX 791, ROCKINGHAM, NC 28380-0791
PO BOX 792, ROCKINGHAM, NC 28380-0792
PO BOX 793, ROCKINGHAM, NC 28380-0793
PO BOX 794, ROCKINGHAM, NC 28380-0794
PO BOX 795, ROCKINGHAM, NC 28380-0795
PO BOX 796, ROCKINGHAM, NC 28380-0796
PO BOX 797, ROCKINGHAM, NC 28380-0797
PO BOX 798, ROCKINGHAM, NC 28380-0798
PO BOX 799, ROCKINGHAM, NC 28380-0799
PO BOX 800, ROCKINGHAM, NC 28380-0800
PO BOX 801, ROCKINGHAM, NC 28380-0801
PO BOX 802, ROCKINGHAM, NC 28380-0802
PO BOX 803, ROCKINGHAM, NC 28380-0803
PO BOX 804, ROCKINGHAM, NC 28380-0804
PO BOX 805, ROCKINGHAM, NC 28380-0805
PO BOX 806, ROCKINGHAM, NC 28380-0806
PO BOX 807, ROCKINGHAM, NC 28380-0807
PO BOX 808, ROCKINGHAM, NC 28380-0808
PO BOX 809, ROCKINGHAM, NC 28380-0809
PO BOX 810, ROCKINGHAM, NC 28380-0810
PO BOX 811, ROCKINGHAM, NC 28380-0811
PO BOX 812, ROCKINGHAM, NC 28380-0812
PO BOX 813, ROCKINGHAM, NC 28380-0813
PO BOX 814, ROCKINGHAM, NC 28380-0814
PO BOX 815, ROCKINGHAM, NC 28380-0815
PO BOX 816, ROCKINGHAM, NC 28380-0816
PO BOX 817, ROCKINGHAM, NC 28380-0817
PO BOX 818, ROCKINGHAM, NC 28380-0818
PO BOX 819, ROCKINGHAM, NC 28380-0819
PO BOX 820, ROCKINGHAM, NC 28380-0820
PO BOX 821, ROCKINGHAM, NC 28380-0821
PO BOX 822, ROCKINGHAM, NC 28380-0822
PO BOX 823, ROCKINGHAM, NC 28380-0823
PO BOX 824, ROCKINGHAM, NC 28380-0824
PO BOX 825, ROCKINGHAM, NC 28380-0825
PO BOX 826, ROCKINGHAM, NC 28380-0826
PO BOX 827, ROCKINGHAM, NC 28380-0827
PO BOX 828, ROCKINGHAM, NC 28380-0828
PO BOX 829, ROCKINGHAM, NC 28380-0829
PO BOX 830, ROCKINGHAM, NC 28380-0830
PO BOX 831, ROCKINGHAM, NC 28380-0831
PO BOX 832, ROCKINGHAM, NC 28380-0832
PO BOX 833, ROCKINGHAM, NC 28380-0833
PO BOX 834, ROCKINGHAM, NC 28380-0834
PO BOX 835, ROCKINGHAM, NC 28380-0835
PO BOX 836, ROCKINGHAM, NC 28380-0836
PO BOX 837, ROCKINGHAM, NC 28380-0837
PO BOX 838, ROCKINGHAM, NC 28380-0838
PO BOX 839, ROCKINGHAM, NC 28380-0839
PO BOX 840, ROCKINGHAM, NC 28380-0840
PO BOX 841, ROCKINGHAM, NC 28380-0841
PO BOX 842, ROCKINGHAM, NC 28380-0842
PO BOX 843, ROCKINGHAM, NC 28380-0843
PO BOX 844, ROCKINGHAM, NC 28380-0844
PO BOX 845, ROCKINGHAM, NC 28380-0845
PO BOX 846, ROCKINGHAM, NC 28380-0846
PO BOX 847, ROCKINGHAM, NC 28380-0847
PO BOX 848, ROCKINGHAM, NC 28380-0848
PO BOX 849, ROCKINGHAM, NC 28380-0849
PO BOX 850, ROCKINGHAM, NC 28380-0850
PO BOX 851, ROCKINGHAM, NC 28380-0851
PO BOX 852, ROCKINGHAM, NC 28380-0852
PO BOX 853, ROCKINGHAM, NC 28380-0853
PO BOX 854, ROCKINGHAM, NC 28380-0854
PO BOX 855, ROCKINGHAM, NC 28380-0855
PO BOX 856, ROCKINGHAM, NC 28380-0856
PO BOX 857, ROCKINGHAM, NC 28380-0857
PO BOX 858, ROCKINGHAM, NC 28380-0858
PO BOX 859, ROCKINGHAM, NC 28380-0859
PO BOX 860, ROCKINGHAM, NC 28380-0860
PO BOX 861, ROCKINGHAM, NC 28380-0861
PO BOX 862, ROCKINGHAM, NC 28380-0862
PO BOX 863, ROCKINGHAM, NC 28380-0863
PO BOX 864, ROCKINGHAM, NC 28380-0864
PO BOX 865, ROCKINGHAM, NC 28380-0865
PO BOX 866, ROCKINGHAM, NC 28380-0866
PO BOX 867, ROCKINGHAM, NC 28380-0867
PO BOX 868, ROCKINGHAM, NC 28380-0868
PO BOX 869, ROCKINGHAM, NC 28380-0869
PO BOX 870, ROCKINGHAM, NC 28380-0870
PO BOX 871, ROCKINGHAM, NC 28380-0871
PO BOX 872, ROCKINGHAM, NC 28380-0872
PO BOX 873, ROCKINGHAM, NC 28380-0873
PO BOX 874, ROCKINGHAM, NC 28380-0874
PO BOX 875, ROCKINGHAM, NC 28380-0875
PO BOX 876, ROCKINGHAM, NC 28380-0876
PO BOX 877, ROCKINGHAM, NC 28380-0877
PO BOX 878, ROCKINGHAM, NC 28380-0878
PO BOX 879, ROCKINGHAM, NC 28380-0879
PO BOX 880, ROCKINGHAM, NC 28380-0880
PO BOX 881, ROCKINGHAM, NC 28380-0881
PO BOX 882, ROCKINGHAM, NC 28380-0882
PO BOX 883, ROCKINGHAM, NC 28380-0883
PO BOX 884, ROCKINGHAM, NC 28380-0884
PO BOX 885, ROCKINGHAM, NC 28380-0885
PO BOX 886, ROCKINGHAM, NC 28380-0886
PO BOX 887, ROCKINGHAM, NC 28380-0887
PO BOX 888, ROCKINGHAM, NC 28380-0888
PO BOX 889, ROCKINGHAM, NC 28380-0889
PO BOX 890, ROCKINGHAM, NC 28380-0890
PO BOX 891, ROCKINGHAM, NC 28380-0891
PO BOX 892, ROCKINGHAM, NC 28380-0892
PO BOX 893, ROCKINGHAM, NC 28380-0893
PO BOX 894, ROCKINGHAM, NC 28380-0894
PO BOX 895, ROCKINGHAM, NC 28380-0895
PO BOX 896, ROCKINGHAM, NC 28380-0896
PO BOX 897, ROCKINGHAM, NC 28380-0897
PO BOX 898, ROCKINGHAM, NC 28380-0898
PO BOX 899, ROCKINGHAM, NC 28380-0899
PO BOX 900, ROCKINGHAM, NC 28380-0900
PO BOX 901, ROCKINGHAM, NC 28380-0901
PO BOX 902, ROCKINGHAM, NC 28380-0902
PO BOX 903, ROCKINGHAM, NC 28380-0903
PO BOX 904, ROCKINGHAM, NC 28380-0904
PO BOX 905, ROCKINGHAM, NC 28380-0905
PO BOX 906, ROCKINGHAM, NC 28380-0906
PO BOX 907, ROCKINGHAM, NC 28380-0907
PO BOX 908, ROCKINGHAM, NC 28380-0908
PO BOX 909, ROCKINGHAM, NC 28380-0909
PO BOX 910, ROCKINGHAM, NC 28380-0910
PO BOX 911, ROCKINGHAM, NC 28380-0911
PO BOX 912, ROCKINGHAM, NC 28380-0912
PO BOX 913, ROCKINGHAM, NC 28380-0913
PO BOX 914, ROCKINGHAM, NC 28380-0914
PO BOX 915, ROCKINGHAM, NC 28380-0915
PO BOX 916, ROCKINGHAM, NC 28380-0916
PO BOX 917, ROCKINGHAM, NC 28380-0917
PO BOX 918, ROCKINGHAM, NC 28380-0918
PO BOX 919, ROCKINGHAM, NC 28380-0919
PO BOX 920, ROCKINGHAM, NC 28380-0920
PO BOX 921, ROCKINGHAM, NC 28380-0921
PO BOX 922, ROCKINGHAM, NC 28380-0922
PO BOX 923, ROCKINGHAM, NC 28380-0923
PO BOX 924, ROCKINGHAM, NC 28380-0924
PO BOX 925, ROCKINGHAM, NC 28380-0925
PO BOX 926, ROCKINGHAM, NC 28380-0926
PO BOX 927, ROCKINGHAM, NC 28380-0927
PO BOX 928, ROCKINGHAM, NC 28380-0928
PO BOX 929, ROCKINGHAM, NC 28380-0929
PO BOX 930, ROCKINGHAM, NC 28380-0930
PO BOX 931, ROCKINGHAM, NC 28380-0931
PO BOX 932, ROCKINGHAM, NC 28380-0932
PO BOX 933, ROCKINGHAM, NC 28380-0933
PO BOX 934, ROCKINGHAM, NC 28380-0934
PO BOX 935, ROCKINGHAM, NC 28380-0935
PO BOX 936, ROCKINGHAM, NC 28380-0936
PO BOX 937, ROCKINGHAM, NC 28380-0937
PO BOX 938, ROCKINGHAM, NC 28380-0938
PO BOX 939, ROCKINGHAM, NC 28380-0939
PO BOX 940, ROCKINGHAM, NC 28380-0940
PO BOX 941, ROCKINGHAM, NC 28380-0941
PO BOX 942, ROCKINGHAM, NC 28380-0942
PO BOX 943, ROCKINGHAM, NC 28380-0943
PO BOX 944, ROCKINGHAM, NC 28380-0944
PO BOX 945, ROCKINGHAM, NC 28380-0945
PO BOX 946, ROCKINGHAM, NC 28380-0946
PO BOX 947, ROCKINGHAM, NC 28380-0947
PO BOX 948, ROCKINGHAM, NC 28380-0948
PO BOX 949, ROCKINGHAM, NC 28380-0949
PO BOX 950, ROCKINGHAM, NC 28380-0950
PO BOX 951, ROCKINGHAM, NC 28380-0951
PO BOX 952, ROCKINGHAM, NC 28380-0952
PO BOX 953, ROCKINGHAM, NC 28380-0953
PO BOX 954, ROCKINGHAM, NC 28380-0954
PO BOX 955, ROCKINGHAM, NC 28380-0955
PO BOX 956, ROCKINGHAM, NC 28380-0956
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