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 851, FERNANDINA BEACH, FL 32035-0851
PO BOX 852, FERNANDINA BEACH, FL 32035-0852
PO BOX 853, FERNANDINA BEACH, FL 32035-0853
PO BOX 854, FERNANDINA BEACH, FL 32035-0854
PO BOX 855, FERNANDINA BEACH, FL 32035-0855
PO BOX 856, FERNANDINA BEACH, FL 32035-0856
PO BOX 857, FERNANDINA BEACH, FL 32035-0857
PO BOX 858, FERNANDINA BEACH, FL 32035-0858
PO BOX 859, FERNANDINA BEACH, FL 32035-0859
PO BOX 860, FERNANDINA BEACH, FL 32035-0860
PO BOX 861, FERNANDINA BEACH, FL 32035-0861
PO BOX 862, FERNANDINA BEACH, FL 32035-0862
PO BOX 863, FERNANDINA BEACH, FL 32035-0863
PO BOX 864, FERNANDINA BEACH, FL 32035-0864
PO BOX 865, FERNANDINA BEACH, FL 32035-0865
PO BOX 866, FERNANDINA BEACH, FL 32035-0866
PO BOX 867, FERNANDINA BEACH, FL 32035-0867
PO BOX 868, FERNANDINA BEACH, FL 32035-0868
PO BOX 869, FERNANDINA BEACH, FL 32035-0869
PO BOX 870, FERNANDINA BEACH, FL 32035-0870
PO BOX 871, FERNANDINA BEACH, FL 32035-0871
PO BOX 872, FERNANDINA BEACH, FL 32035-0872
PO BOX 873, FERNANDINA BEACH, FL 32035-0873
PO BOX 874, FERNANDINA BEACH, FL 32035-0874
PO BOX 875, FERNANDINA BEACH, FL 32035-0875
PO BOX 876, FERNANDINA BEACH, FL 32035-0876
PO BOX 877, FERNANDINA BEACH, FL 32035-0877
PO BOX 878, FERNANDINA BEACH, FL 32035-0878
PO BOX 879, FERNANDINA BEACH, FL 32035-0879
PO BOX 880, FERNANDINA BEACH, FL 32035-0880
PO BOX 881, FERNANDINA BEACH, FL 32035-0881
PO BOX 882, FERNANDINA BEACH, FL 32035-0882
PO BOX 883, FERNANDINA BEACH, FL 32035-0883
PO BOX 884, FERNANDINA BEACH, FL 32035-0884
PO BOX 885, FERNANDINA BEACH, FL 32035-0885
PO BOX 886, FERNANDINA BEACH, FL 32035-0886
PO BOX 887, FERNANDINA BEACH, FL 32035-0887
PO BOX 888, FERNANDINA BEACH, FL 32035-0888
PO BOX 889, FERNANDINA BEACH, FL 32035-0889
PO BOX 890, FERNANDINA BEACH, FL 32035-0890
PO BOX 891, FERNANDINA BEACH, FL 32035-0891
PO BOX 892, FERNANDINA BEACH, FL 32035-0892
PO BOX 893, FERNANDINA BEACH, FL 32035-0893
PO BOX 894, FERNANDINA BEACH, FL 32035-0894
PO BOX 895, FERNANDINA BEACH, FL 32035-0895
PO BOX 896, FERNANDINA BEACH, FL 32035-0896
PO BOX 897, FERNANDINA BEACH, FL 32035-0897
PO BOX 898, FERNANDINA BEACH, FL 32035-0898
PO BOX 899, FERNANDINA BEACH, FL 32035-0899
PO BOX 900, FERNANDINA BEACH, FL 32035-0900
PO BOX 901, FERNANDINA BEACH, FL 32035-0901
PO BOX 902, FERNANDINA BEACH, FL 32035-0902
PO BOX 903, FERNANDINA BEACH, FL 32035-0903
PO BOX 904, FERNANDINA BEACH, FL 32035-0904
PO BOX 905, FERNANDINA BEACH, FL 32035-0905
PO BOX 906, FERNANDINA BEACH, FL 32035-0906
PO BOX 907, FERNANDINA BEACH, FL 32035-0907
PO BOX 908, FERNANDINA BEACH, FL 32035-0908
PO BOX 909, FERNANDINA BEACH, FL 32035-0909
PO BOX 910, FERNANDINA BEACH, FL 32035-0910
PO BOX 911, FERNANDINA BEACH, FL 32035-0911
PO BOX 912, FERNANDINA BEACH, FL 32035-0912
PO BOX 913, FERNANDINA BEACH, FL 32035-0913
PO BOX 914, FERNANDINA BEACH, FL 32035-0914
PO BOX 915, FERNANDINA BEACH, FL 32035-0915
PO BOX 916, FERNANDINA BEACH, FL 32035-0916
PO BOX 917, FERNANDINA BEACH, FL 32035-0917
PO BOX 918, FERNANDINA BEACH, FL 32035-0918
PO BOX 919, FERNANDINA BEACH, FL 32035-0919
PO BOX 920, FERNANDINA BEACH, FL 32035-0920
PO BOX 921, FERNANDINA BEACH, FL 32035-0921
PO BOX 922, FERNANDINA BEACH, FL 32035-0922
PO BOX 923, FERNANDINA BEACH, FL 32035-0923
PO BOX 924, FERNANDINA BEACH, FL 32035-0924
PO BOX 925, FERNANDINA BEACH, FL 32035-0925
PO BOX 926, FERNANDINA BEACH, FL 32035-0926
PO BOX 927, FERNANDINA BEACH, FL 32035-0927
PO BOX 928, FERNANDINA BEACH, FL 32035-0928
PO BOX 929, FERNANDINA BEACH, FL 32035-0929
PO BOX 930, FERNANDINA BEACH, FL 32035-0930
PO BOX 931, FERNANDINA BEACH, FL 32035-0931
PO BOX 932, FERNANDINA BEACH, FL 32035-0932
PO BOX 933, FERNANDINA BEACH, FL 32035-0933
PO BOX 934, FERNANDINA BEACH, FL 32035-0934
PO BOX 935, FERNANDINA BEACH, FL 32035-0935
PO BOX 936, FERNANDINA BEACH, FL 32035-0936
PO BOX 937, FERNANDINA BEACH, FL 32035-0937
PO BOX 938, FERNANDINA BEACH, FL 32035-0938
PO BOX 939, FERNANDINA BEACH, FL 32035-0939
PO BOX 940, FERNANDINA BEACH, FL 32035-0940
PO BOX 941, FERNANDINA BEACH, FL 32035-0941
PO BOX 942, FERNANDINA BEACH, FL 32035-0942
PO BOX 943, FERNANDINA BEACH, FL 32035-0943
PO BOX 944, FERNANDINA BEACH, FL 32035-0944
PO BOX 945, FERNANDINA BEACH, FL 32035-0945
PO BOX 946, FERNANDINA BEACH, FL 32035-0946
PO BOX 947, FERNANDINA BEACH, FL 32035-0947
PO BOX 948, FERNANDINA BEACH, FL 32035-0948
PO BOX 949, FERNANDINA BEACH, FL 32035-0949
PO BOX 950, FERNANDINA BEACH, FL 32035-0950
PO BOX 951, FERNANDINA BEACH, FL 32035-0951
PO BOX 952, FERNANDINA BEACH, FL 32035-0952
PO BOX 953, FERNANDINA BEACH, FL 32035-0953
PO BOX 954, FERNANDINA BEACH, FL 32035-0954
PO BOX 955, FERNANDINA BEACH, FL 32035-0955
PO BOX 956, FERNANDINA BEACH, FL 32035-0956
PO BOX 957, FERNANDINA BEACH, FL 32035-0957
PO BOX 958, FERNANDINA BEACH, FL 32035-0958
PO BOX 959, FERNANDINA BEACH, FL 32035-0959
PO BOX 960, FERNANDINA BEACH, FL 32035-0960
PO BOX 961, FERNANDINA BEACH, FL 32035-0961
PO BOX 962, FERNANDINA BEACH, FL 32035-0962
PO BOX 963, FERNANDINA BEACH, FL 32035-0963
PO BOX 964, FERNANDINA BEACH, FL 32035-0964
PO BOX 965, FERNANDINA BEACH, FL 32035-0965
PO BOX 966, FERNANDINA BEACH, FL 32035-0966
PO BOX 967, FERNANDINA BEACH, FL 32035-0967
PO BOX 968, FERNANDINA BEACH, FL 32035-0968
PO BOX 969, FERNANDINA BEACH, FL 32035-0969
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