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 72941, NORTH CHARLESTON, SC 29415-2941
PO BOX 72942, NORTH CHARLESTON, SC 29415-2942
PO BOX 72943, NORTH CHARLESTON, SC 29415-2943
PO BOX 72944, NORTH CHARLESTON, SC 29415-2944
PO BOX 72945, NORTH CHARLESTON, SC 29415-2945
PO BOX 72946, NORTH CHARLESTON, SC 29415-2946
PO BOX 72947, NORTH CHARLESTON, SC 29415-2947
PO BOX 72948, NORTH CHARLESTON, SC 29415-2948
PO BOX 72949, NORTH CHARLESTON, SC 29415-2949
PO BOX 72950, NORTH CHARLESTON, SC 29415-2950
PO BOX 72951, NORTH CHARLESTON, SC 29415-2951
PO BOX 72952, NORTH CHARLESTON, SC 29415-2952
PO BOX 72953, NORTH CHARLESTON, SC 29415-2953
PO BOX 72954, NORTH CHARLESTON, SC 29415-2954
PO BOX 72955, NORTH CHARLESTON, SC 29415-2955
PO BOX 72956, NORTH CHARLESTON, SC 29415-2956
PO BOX 72957, NORTH CHARLESTON, SC 29415-2957
PO BOX 72958, NORTH CHARLESTON, SC 29415-2958
PO BOX 72959, NORTH CHARLESTON, SC 29415-2959
PO BOX 72960, NORTH CHARLESTON, SC 29415-2960
PO BOX 72961, NORTH CHARLESTON, SC 29415-2961
PO BOX 72962, NORTH CHARLESTON, SC 29415-2962
PO BOX 72963, NORTH CHARLESTON, SC 29415-2963
PO BOX 72964, NORTH CHARLESTON, SC 29415-2964
PO BOX 72965, NORTH CHARLESTON, SC 29415-2965
PO BOX 72966, NORTH CHARLESTON, SC 29415-2966
PO BOX 72967, NORTH CHARLESTON, SC 29415-2967
PO BOX 72968, NORTH CHARLESTON, SC 29415-2968
PO BOX 72969, NORTH CHARLESTON, SC 29415-2969
PO BOX 72970, NORTH CHARLESTON, SC 29415-2970
PO BOX 72971, NORTH CHARLESTON, SC 29415-2971
PO BOX 72972, NORTH CHARLESTON, SC 29415-2972
PO BOX 72973, NORTH CHARLESTON, SC 29415-2973
PO BOX 72974, NORTH CHARLESTON, SC 29415-2974
PO BOX 72975, NORTH CHARLESTON, SC 29415-2975
PO BOX 72976, NORTH CHARLESTON, SC 29415-2976
PO BOX 72977, NORTH CHARLESTON, SC 29415-2977
PO BOX 72978, NORTH CHARLESTON, SC 29415-2978
PO BOX 72979, NORTH CHARLESTON, SC 29415-2979
PO BOX 72980, NORTH CHARLESTON, SC 29415-2980
PO BOX 72981, NORTH CHARLESTON, SC 29415-2981
PO BOX 72982, NORTH CHARLESTON, SC 29415-2982
PO BOX 72983, NORTH CHARLESTON, SC 29415-2983
PO BOX 72984, NORTH CHARLESTON, SC 29415-2984
PO BOX 72985, NORTH CHARLESTON, SC 29415-2985
PO BOX 72986, NORTH CHARLESTON, SC 29415-2986
PO BOX 72987, NORTH CHARLESTON, SC 29415-2987
PO BOX 72988, NORTH CHARLESTON, SC 29415-2988
PO BOX 72989, NORTH CHARLESTON, SC 29415-2989
PO BOX 72990, NORTH CHARLESTON, SC 29415-2990
PO BOX 72991, NORTH CHARLESTON, SC 29415-2991
PO BOX 72992, NORTH CHARLESTON, SC 29415-2992
PO BOX 72993, NORTH CHARLESTON, SC 29415-2993
PO BOX 72994, NORTH CHARLESTON, SC 29415-2994
PO BOX 72995, NORTH CHARLESTON, SC 29415-2995
PO BOX 72996, NORTH CHARLESTON, SC 29415-2996
PO BOX 72997, NORTH CHARLESTON, SC 29415-2997
PO BOX 72998, NORTH CHARLESTON, SC 29415-2998
PO BOX 72999, NORTH CHARLESTON, SC 29415-2999
PO BOX 73000, NORTH CHARLESTON, SC 29415-3000
PO BOX 73001, NORTH CHARLESTON, SC 29415-3001
PO BOX 73002, NORTH CHARLESTON, SC 29415-3002
PO BOX 73003, NORTH CHARLESTON, SC 29415-3003
PO BOX 73004, NORTH CHARLESTON, SC 29415-3004
PO BOX 73005, NORTH CHARLESTON, SC 29415-3005
PO BOX 73006, NORTH CHARLESTON, SC 29415-3006
PO BOX 73007, NORTH CHARLESTON, SC 29415-3007
PO BOX 73008, NORTH CHARLESTON, SC 29415-3008
PO BOX 73009, NORTH CHARLESTON, SC 29415-3009
PO BOX 73010, NORTH CHARLESTON, SC 29415-3010
PO BOX 73011, NORTH CHARLESTON, SC 29415-3011
PO BOX 73012, NORTH CHARLESTON, SC 29415-3012
PO BOX 73013, NORTH CHARLESTON, SC 29415-3013
PO BOX 73014, NORTH CHARLESTON, SC 29415-3014
PO BOX 73015, NORTH CHARLESTON, SC 29415-3015
PO BOX 73016, NORTH CHARLESTON, SC 29415-3016
PO BOX 73017, NORTH CHARLESTON, SC 29415-3017
PO BOX 73018, NORTH CHARLESTON, SC 29415-3018
PO BOX 73019, NORTH CHARLESTON, SC 29415-3019
PO BOX 73020, NORTH CHARLESTON, SC 29415-3020
PO BOX 73021, NORTH CHARLESTON, SC 29415-3021
PO BOX 73022, NORTH CHARLESTON, SC 29415-3022
PO BOX 73023, NORTH CHARLESTON, SC 29415-3023
PO BOX 73024, NORTH CHARLESTON, SC 29415-3024
PO BOX 73025, NORTH CHARLESTON, SC 29415-3025
PO BOX 73026, NORTH CHARLESTON, SC 29415-3026
PO BOX 73027, NORTH CHARLESTON, SC 29415-3027
PO BOX 73028, NORTH CHARLESTON, SC 29415-3028
PO BOX 73029, NORTH CHARLESTON, SC 29415-3029
PO BOX 73030, NORTH CHARLESTON, SC 29415-3030
PO BOX 73031, NORTH CHARLESTON, SC 29415-3031
PO BOX 73032, NORTH CHARLESTON, SC 29415-3032
PO BOX 73033, NORTH CHARLESTON, SC 29415-3033
PO BOX 73034, NORTH CHARLESTON, SC 29415-3034
PO BOX 73035, NORTH CHARLESTON, SC 29415-3035
PO BOX 73036, NORTH CHARLESTON, SC 29415-3036
PO BOX 73037, NORTH CHARLESTON, SC 29415-3037
PO BOX 73038, NORTH CHARLESTON, SC 29415-3038
PO BOX 73039, NORTH CHARLESTON, SC 29415-3039
PO BOX 73040, NORTH CHARLESTON, SC 29415-3040
PO BOX 73041, NORTH CHARLESTON, SC 29415-3041
PO BOX 73042, NORTH CHARLESTON, SC 29415-3042
PO BOX 73043, NORTH CHARLESTON, SC 29415-3043
PO BOX 73044, NORTH CHARLESTON, SC 29415-3044
PO BOX 73045, NORTH CHARLESTON, SC 29415-3045
PO BOX 73046, NORTH CHARLESTON, SC 29415-3046
PO BOX 73047, NORTH CHARLESTON, SC 29415-3047
PO BOX 73048, NORTH CHARLESTON, SC 29415-3048
PO BOX 73049, NORTH CHARLESTON, SC 29415-3049
PO BOX 73050, NORTH CHARLESTON, SC 29415-3050
PO BOX 73051, NORTH CHARLESTON, SC 29415-3051
PO BOX 73052, NORTH CHARLESTON, SC 29415-3052
PO BOX 73053, NORTH CHARLESTON, SC 29415-3053
PO BOX 73054, NORTH CHARLESTON, SC 29415-3054
PO BOX 73055, NORTH CHARLESTON, SC 29415-3055
PO BOX 73056, NORTH CHARLESTON, SC 29415-3056
PO BOX 73057, NORTH CHARLESTON, SC 29415-3057
PO BOX 73058, NORTH CHARLESTON, SC 29415-3058
PO BOX 73059, NORTH CHARLESTON, SC 29415-3059
PO BOX 73060, NORTH CHARLESTON, SC 29415-3060
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