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 2932, FORT SMITH, AR 72913-2932
PO BOX 2933, FORT SMITH, AR 72913-2933
PO BOX 2934, FORT SMITH, AR 72913-2934
PO BOX 2935, FORT SMITH, AR 72913-2935
PO BOX 2936, FORT SMITH, AR 72913-2936
PO BOX 2937, FORT SMITH, AR 72913-2937
PO BOX 2938, FORT SMITH, AR 72913-2938
PO BOX 2939, FORT SMITH, AR 72913-2939
PO BOX 2940, FORT SMITH, AR 72913-2940
PO BOX 2941, FORT SMITH, AR 72913-2941
PO BOX 2942, FORT SMITH, AR 72913-2942
PO BOX 2943, FORT SMITH, AR 72913-2943
PO BOX 2944, FORT SMITH, AR 72913-2944
PO BOX 2945, FORT SMITH, AR 72913-2945
PO BOX 2946, FORT SMITH, AR 72913-2946
PO BOX 2947, FORT SMITH, AR 72913-2947
PO BOX 2948, FORT SMITH, AR 72913-2948
PO BOX 2949, FORT SMITH, AR 72913-2949
PO BOX 2950, FORT SMITH, AR 72913-2950
PO BOX 2951, FORT SMITH, AR 72913-2951
PO BOX 2952, FORT SMITH, AR 72913-2952
PO BOX 2953, FORT SMITH, AR 72913-2953
PO BOX 2954, FORT SMITH, AR 72913-2954
PO BOX 2955, FORT SMITH, AR 72913-2955
PO BOX 2956, FORT SMITH, AR 72913-2956
PO BOX 2957, FORT SMITH, AR 72913-2957
PO BOX 2958, FORT SMITH, AR 72913-2958
PO BOX 2959, FORT SMITH, AR 72913-2959
PO BOX 2960, FORT SMITH, AR 72913-2960
PO BOX 2961, FORT SMITH, AR 72913-2961
PO BOX 2962, FORT SMITH, AR 72913-2962
PO BOX 2963, FORT SMITH, AR 72913-2963
PO BOX 2964, FORT SMITH, AR 72913-2964
PO BOX 2965, FORT SMITH, AR 72913-2965
PO BOX 2966, FORT SMITH, AR 72913-2966
PO BOX 2967, FORT SMITH, AR 72913-2967
PO BOX 2968, FORT SMITH, AR 72913-2968
PO BOX 2969, FORT SMITH, AR 72913-2969
PO BOX 2970, FORT SMITH, AR 72913-2970
PO BOX 2971, FORT SMITH, AR 72913-2971
PO BOX 2972, FORT SMITH, AR 72913-2972
PO BOX 2973, FORT SMITH, AR 72913-2973
PO BOX 2974, FORT SMITH, AR 72913-2974
PO BOX 2975, FORT SMITH, AR 72913-2975
PO BOX 2976, FORT SMITH, AR 72913-2976
PO BOX 2977, FORT SMITH, AR 72913-2977
PO BOX 2978, FORT SMITH, AR 72913-2978
PO BOX 2979, FORT SMITH, AR 72913-2979
PO BOX 2980, FORT SMITH, AR 72913-2980
PO BOX 2981, FORT SMITH, AR 72913-2981
PO BOX 2982, FORT SMITH, AR 72913-2982
PO BOX 2983, FORT SMITH, AR 72913-2983
PO BOX 2984, FORT SMITH, AR 72913-2984
PO BOX 2985, FORT SMITH, AR 72913-2985
PO BOX 2986, FORT SMITH, AR 72913-2986
PO BOX 2987, FORT SMITH, AR 72913-2987
PO BOX 2988, FORT SMITH, AR 72913-2988
PO BOX 2989, FORT SMITH, AR 72913-2989
PO BOX 2990, FORT SMITH, AR 72913-2990
PO BOX 2991, FORT SMITH, AR 72913-2991
PO BOX 2992, FORT SMITH, AR 72913-2992
PO BOX 2993, FORT SMITH, AR 72913-2993
PO BOX 2994, FORT SMITH, AR 72913-2994
PO BOX 2995, FORT SMITH, AR 72913-2995
PO BOX 2996, FORT SMITH, AR 72913-2996
PO BOX 2997, FORT SMITH, AR 72913-2997
PO BOX 2998, FORT SMITH, AR 72913-2998
PO BOX 2999, FORT SMITH, AR 72913-2999
PO BOX 3000, FORT SMITH, AR 72913-3000
PO BOX 3001, FORT SMITH, AR 72913-3001
PO BOX 3002, FORT SMITH, AR 72913-3002
PO BOX 3003, FORT SMITH, AR 72913-3003
PO BOX 3004, FORT SMITH, AR 72913-3004
PO BOX 3005, FORT SMITH, AR 72913-3005
PO BOX 3006, FORT SMITH, AR 72913-3006
PO BOX 3007, FORT SMITH, AR 72913-3007
PO BOX 3008, FORT SMITH, AR 72913-3008
PO BOX 3009, FORT SMITH, AR 72913-3009
PO BOX 3010, FORT SMITH, AR 72913-3010
PO BOX 3011, FORT SMITH, AR 72913-3011
PO BOX 3012, FORT SMITH, AR 72913-3012
PO BOX 3013, FORT SMITH, AR 72913-3013
PO BOX 3014, FORT SMITH, AR 72913-3014
PO BOX 3015, FORT SMITH, AR 72913-3015
PO BOX 3016, FORT SMITH, AR 72913-3016
PO BOX 3017, FORT SMITH, AR 72913-3017
PO BOX 3018, FORT SMITH, AR 72913-3018
PO BOX 3019, FORT SMITH, AR 72913-3019
PO BOX 3020, FORT SMITH, AR 72913-3020
PO BOX 3021, FORT SMITH, AR 72913-3021
PO BOX 3022, FORT SMITH, AR 72913-3022
PO BOX 3023, FORT SMITH, AR 72913-3023
PO BOX 3024, FORT SMITH, AR 72913-3024
PO BOX 3025, FORT SMITH, AR 72913-3025
PO BOX 3026, FORT SMITH, AR 72913-3026
PO BOX 3027, FORT SMITH, AR 72913-3027
PO BOX 3028, FORT SMITH, AR 72913-3028
PO BOX 3029, FORT SMITH, AR 72913-3029
PO BOX 3030, FORT SMITH, AR 72913-3030
PO BOX 3031, FORT SMITH, AR 72913-3031
PO BOX 3032, FORT SMITH, AR 72913-3032
PO BOX 3033, FORT SMITH, AR 72913-3033
PO BOX 3034, FORT SMITH, AR 72913-3034
PO BOX 3035, FORT SMITH, AR 72913-3035
PO BOX 3036, FORT SMITH, AR 72913-3036
PO BOX 3037, FORT SMITH, AR 72913-3037
PO BOX 3038, FORT SMITH, AR 72913-3038
PO BOX 3039, FORT SMITH, AR 72913-3039
PO BOX 3040, FORT SMITH, AR 72913-3040
PO BOX 3041, FORT SMITH, AR 72913-3041
PO BOX 3042, FORT SMITH, AR 72913-3042
PO BOX 3043, FORT SMITH, AR 72913-3043
PO BOX 3044, FORT SMITH, AR 72913-3044
PO BOX 3045, FORT SMITH, AR 72913-3045
PO BOX 3046, FORT SMITH, AR 72913-3046
PO BOX 3047, FORT SMITH, AR 72913-3047
PO BOX 3048, FORT SMITH, AR 72913-3048
PO BOX 3049, FORT SMITH, AR 72913-3049
PO BOX 3050, FORT SMITH, AR 72913-3050
PO BOX 3051, FORT SMITH, AR 72913-3051
PO BOX 3052, FORT SMITH, AR 72913-3052
PO BOX 3053, FORT SMITH, AR 72913-3053
PO BOX 3054, FORT SMITH, AR 72913-3054
PO BOX 3055, FORT SMITH, AR 72913-3055
PO BOX 3056, FORT SMITH, AR 72913-3056
PO BOX 3057, FORT SMITH, AR 72913-3057
PO BOX 3058, FORT SMITH, AR 72913-3058
PO BOX 3059, FORT SMITH, AR 72913-3059
PO BOX 3060, FORT SMITH, AR 72913-3060
PO BOX 3061, FORT SMITH, AR 72913-3061
PO BOX 3062, FORT SMITH, AR 72913-3062
PO BOX 3063, FORT SMITH, AR 72913-3063
PO BOX 3064, FORT SMITH, AR 72913-3064
PO BOX 3065, FORT SMITH, AR 72913-3065
PO BOX 3066, FORT SMITH, AR 72913-3066
PO BOX 3067, FORT SMITH, AR 72913-3067
PO BOX 3068, FORT SMITH, AR 72913-3068
PO BOX 3069, FORT SMITH, AR 72913-3069
PO BOX 3070, FORT SMITH, AR 72913-3070
PO BOX 3071, FORT SMITH, AR 72913-3071
PO BOX 3072, FORT SMITH, AR 72913-3072
PO BOX 3073, FORT SMITH, AR 72913-3073
PO BOX 3074, FORT SMITH, AR 72913-3074
PO BOX 3075, FORT SMITH, AR 72913-3075
PO BOX 3076, FORT SMITH, AR 72913-3076
PO BOX 3077, FORT SMITH, AR 72913-3077
PO BOX 3078, FORT SMITH, AR 72913-3078
PO BOX 3079, FORT SMITH, AR 72913-3079
PO BOX 3080, FORT SMITH, AR 72913-3080
PO BOX 3081, FORT SMITH, AR 72913-3081
PO BOX 3082, FORT SMITH, AR 72913-3082
PO BOX 3083, FORT SMITH, AR 72913-3083
PO BOX 3084, FORT SMITH, AR 72913-3084
PO BOX 3085, FORT SMITH, AR 72913-3085
PO BOX 3086, FORT SMITH, AR 72913-3086
PO BOX 3087, FORT SMITH, AR 72913-3087
PO BOX 3088, FORT SMITH, AR 72913-3088
PO BOX 3089, FORT SMITH, AR 72913-3089
PO BOX 3090, FORT SMITH, AR 72913-3090
PO BOX 3091, FORT SMITH, AR 72913-3091
PO BOX 3092, FORT SMITH, AR 72913-3092
PO BOX 3093, FORT SMITH, AR 72913-3093
PO BOX 3094, FORT SMITH, AR 72913-3094
PO BOX 3095, FORT SMITH, AR 72913-3095
PO BOX 3096, FORT SMITH, AR 72913-3096
PO BOX 3097, FORT SMITH, AR 72913-3097
PO BOX 3098, FORT SMITH, AR 72913-3098
PO BOX 3099, FORT SMITH, AR 72913-3099
PO BOX 3100, FORT SMITH, AR 72913-3100
PO BOX 3101, FORT SMITH, AR 72913-3101
PO BOX 3102, FORT SMITH, AR 72913-3102
PO BOX 3103, FORT SMITH, AR 72913-3103
PO BOX 3104, FORT SMITH, AR 72913-3104
PO BOX 3105, FORT SMITH, AR 72913-3105
PO BOX 3106, FORT SMITH, AR 72913-3106
PO BOX 3107, FORT SMITH, AR 72913-3107
PO BOX 3108, FORT SMITH, AR 72913-3108
PO BOX 3109, FORT SMITH, AR 72913-3109
PO BOX 3110, FORT SMITH, AR 72913-3110
PO BOX 3111, FORT SMITH, AR 72913-3111
PO BOX 3112, FORT SMITH, AR 72913-3112
PO BOX 3113, FORT SMITH, AR 72913-3113
PO BOX 3114, FORT SMITH, AR 72913-3114
PO BOX 3115, FORT SMITH, AR 72913-3115
PO BOX 3116, FORT SMITH, AR 72913-3116
PO BOX 3117, FORT SMITH, AR 72913-3117
PO BOX 3118, FORT SMITH, AR 72913-3118
PO BOX 3119, FORT SMITH, AR 72913-3119
PO BOX 3120, FORT SMITH, AR 72913-3120
PO BOX 3121, FORT SMITH, AR 72913-3121
PO BOX 3122, FORT SMITH, AR 72913-3122
PO BOX 3123, FORT SMITH, AR 72913-3123
PO BOX 3124, FORT SMITH, AR 72913-3124
PO BOX 3125, FORT SMITH, AR 72913-3125
PO BOX 3126, FORT SMITH, AR 72913-3126