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 841, COLUMBUS, MS 39703-0841
PO BOX 842, COLUMBUS, MS 39703-0842
PO BOX 843, COLUMBUS, MS 39703-0843
PO BOX 844, COLUMBUS, MS 39703-0844
PO BOX 845, COLUMBUS, MS 39703-0845
PO BOX 846, COLUMBUS, MS 39703-0846
PO BOX 847, COLUMBUS, MS 39703-0847
PO BOX 848, COLUMBUS, MS 39703-0848
PO BOX 849, COLUMBUS, MS 39703-0849
PO BOX 850, COLUMBUS, MS 39703-0850
PO BOX 851, COLUMBUS, MS 39703-0851
PO BOX 852, COLUMBUS, MS 39703-0852
PO BOX 853, COLUMBUS, MS 39703-0853
PO BOX 854, COLUMBUS, MS 39703-0854
PO BOX 855, COLUMBUS, MS 39703-0855
PO BOX 856, COLUMBUS, MS 39703-0856
PO BOX 857, COLUMBUS, MS 39703-0857
PO BOX 858, COLUMBUS, MS 39703-0858
PO BOX 859, COLUMBUS, MS 39703-0859
PO BOX 860, COLUMBUS, MS 39703-0860
PO BOX 861, COLUMBUS, MS 39703-0861
PO BOX 862, COLUMBUS, MS 39703-0862
PO BOX 863, COLUMBUS, MS 39703-0863
PO BOX 864, COLUMBUS, MS 39703-0864
PO BOX 865, COLUMBUS, MS 39703-0865
PO BOX 866, COLUMBUS, MS 39703-0866
PO BOX 867, COLUMBUS, MS 39703-0867
PO BOX 868, COLUMBUS, MS 39703-0868
PO BOX 869, COLUMBUS, MS 39703-0869
PO BOX 870, COLUMBUS, MS 39703-0870
PO BOX 871, COLUMBUS, MS 39703-0871
PO BOX 872, COLUMBUS, MS 39703-0872
PO BOX 873, COLUMBUS, MS 39703-0873
PO BOX 874, COLUMBUS, MS 39703-0874
PO BOX 875, COLUMBUS, MS 39703-0875
PO BOX 876, COLUMBUS, MS 39703-0876
PO BOX 877, COLUMBUS, MS 39703-0877
PO BOX 878, COLUMBUS, MS 39703-0878
PO BOX 879, COLUMBUS, MS 39703-0879
PO BOX 880, COLUMBUS, MS 39703-0880
PO BOX 881, COLUMBUS, MS 39703-0881
PO BOX 882, COLUMBUS, MS 39703-0882
PO BOX 883, COLUMBUS, MS 39703-0883
PO BOX 884, COLUMBUS, MS 39703-0884
PO BOX 885, COLUMBUS, MS 39703-0885
PO BOX 886, COLUMBUS, MS 39703-0886
PO BOX 887, COLUMBUS, MS 39703-0887
PO BOX 888, COLUMBUS, MS 39703-0888
PO BOX 889, COLUMBUS, MS 39703-0889
PO BOX 890, COLUMBUS, MS 39703-0890
PO BOX 891, COLUMBUS, MS 39703-0891
PO BOX 892, COLUMBUS, MS 39703-0892
PO BOX 893, COLUMBUS, MS 39703-0893
PO BOX 894, COLUMBUS, MS 39703-0894
PO BOX 895, COLUMBUS, MS 39703-0895
PO BOX 896, COLUMBUS, MS 39703-0896
PO BOX 897, COLUMBUS, MS 39703-0897
PO BOX 898, COLUMBUS, MS 39703-0898
PO BOX 899, COLUMBUS, MS 39703-0899
PO BOX 900, COLUMBUS, MS 39703-0900
PO BOX 901, COLUMBUS, MS 39703-0901
PO BOX 902, COLUMBUS, MS 39703-0902
PO BOX 903, COLUMBUS, MS 39703-0903
PO BOX 904, COLUMBUS, MS 39703-0904
PO BOX 905, COLUMBUS, MS 39703-0905
PO BOX 906, COLUMBUS, MS 39703-0906
PO BOX 907, COLUMBUS, MS 39703-0907
PO BOX 908, COLUMBUS, MS 39703-0908
PO BOX 909, COLUMBUS, MS 39703-0909
PO BOX 910, COLUMBUS, MS 39703-0910
PO BOX 911, COLUMBUS, MS 39703-0911
PO BOX 912, COLUMBUS, MS 39703-0912
PO BOX 913, COLUMBUS, MS 39703-0913
PO BOX 914, COLUMBUS, MS 39703-0914
PO BOX 915, COLUMBUS, MS 39703-0915
PO BOX 916, COLUMBUS, MS 39703-0916
PO BOX 917, COLUMBUS, MS 39703-0917
PO BOX 918, COLUMBUS, MS 39703-0918
PO BOX 919, COLUMBUS, MS 39703-0919
PO BOX 920, COLUMBUS, MS 39703-0920
PO BOX 921, COLUMBUS, MS 39703-0921
PO BOX 922, COLUMBUS, MS 39703-0922
PO BOX 923, COLUMBUS, MS 39703-0923
PO BOX 924, COLUMBUS, MS 39703-0924
PO BOX 925, COLUMBUS, MS 39703-0925
PO BOX 926, COLUMBUS, MS 39703-0926
PO BOX 927, COLUMBUS, MS 39703-0927
PO BOX 928, COLUMBUS, MS 39703-0928
PO BOX 929, COLUMBUS, MS 39703-0929
PO BOX 930, COLUMBUS, MS 39703-0930
PO BOX 931, COLUMBUS, MS 39703-0931
PO BOX 932, COLUMBUS, MS 39703-0932
PO BOX 933, COLUMBUS, MS 39703-0933
PO BOX 934, COLUMBUS, MS 39703-0934
PO BOX 935, COLUMBUS, MS 39703-0935
PO BOX 936, COLUMBUS, MS 39703-0936
PO BOX 937, COLUMBUS, MS 39703-0937
PO BOX 938, COLUMBUS, MS 39703-0938
PO BOX 939, COLUMBUS, MS 39703-0939
PO BOX 940, COLUMBUS, MS 39703-0940
PO BOX 941, COLUMBUS, MS 39703-0941
PO BOX 942, COLUMBUS, MS 39703-0942
PO BOX 943, COLUMBUS, MS 39703-0943
PO BOX 944, COLUMBUS, MS 39703-0944
PO BOX 945, COLUMBUS, MS 39703-0945
PO BOX 946, COLUMBUS, MS 39703-0946
PO BOX 947, COLUMBUS, MS 39703-0947
PO BOX 948, COLUMBUS, MS 39703-0948
PO BOX 949, COLUMBUS, MS 39703-0949
PO BOX 950, COLUMBUS, MS 39703-0950
PO BOX 951, COLUMBUS, MS 39703-0951
PO BOX 952, COLUMBUS, MS 39703-0952
PO BOX 953, COLUMBUS, MS 39703-0953
PO BOX 954, COLUMBUS, MS 39703-0954
PO BOX 955, COLUMBUS, MS 39703-0955
PO BOX 956, COLUMBUS, MS 39703-0956
PO BOX 957, COLUMBUS, MS 39703-0957
PO BOX 958, COLUMBUS, MS 39703-0958
PO BOX 959, COLUMBUS, MS 39703-0959
PO BOX 960, COLUMBUS, MS 39703-0960
PO BOX 961, COLUMBUS, MS 39703-0961
PO BOX 962, COLUMBUS, MS 39703-0962
PO BOX 963, COLUMBUS, MS 39703-0963
PO BOX 964, COLUMBUS, MS 39703-0964
PO BOX 965, COLUMBUS, MS 39703-0965
PO BOX 966, COLUMBUS, MS 39703-0966
PO BOX 967, COLUMBUS, MS 39703-0967
PO BOX 968, COLUMBUS, MS 39703-0968
PO BOX 969, COLUMBUS, MS 39703-0969
PO BOX 970, COLUMBUS, MS 39703-0970
PO BOX 971, COLUMBUS, MS 39703-0971
PO BOX 972, COLUMBUS, MS 39703-0972
PO BOX 973, COLUMBUS, MS 39703-0973
PO BOX 974, COLUMBUS, MS 39703-0974
PO BOX 975, COLUMBUS, MS 39703-0975
PO BOX 976, COLUMBUS, MS 39703-0976
PO BOX 977, COLUMBUS, MS 39703-0977
PO BOX 978, COLUMBUS, MS 39703-0978
PO BOX 979, COLUMBUS, MS 39703-0979
PO BOX 980, COLUMBUS, MS 39703-0980
PO BOX 981, COLUMBUS, MS 39703-0981
PO BOX 982, COLUMBUS, MS 39703-0982
PO BOX 983, COLUMBUS, MS 39703-0983
PO BOX 984, COLUMBUS, MS 39703-0984
PO BOX 985, COLUMBUS, MS 39703-0985
PO BOX 986, COLUMBUS, MS 39703-0986
PO BOX 987, COLUMBUS, MS 39703-0987
PO BOX 988, COLUMBUS, MS 39703-0988
PO BOX 989, COLUMBUS, MS 39703-0989
PO BOX 990, COLUMBUS, MS 39703-0990
PO BOX 991, COLUMBUS, MS 39703-0991
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