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 13000, BRIDGEPORT, CT 06673-3000
PO BOX 13001, BRIDGEPORT, CT 06673-3001
PO BOX 13002, BRIDGEPORT, CT 06673-3002
PO BOX 13003, BRIDGEPORT, CT 06673-3003
PO BOX 13004, BRIDGEPORT, CT 06673-3004
PO BOX 13005, BRIDGEPORT, CT 06673-3005
PO BOX 13006, BRIDGEPORT, CT 06673-3006
PO BOX 13007, BRIDGEPORT, CT 06673-3007
PO BOX 13008, BRIDGEPORT, CT 06673-3008
PO BOX 13009, BRIDGEPORT, CT 06673-3009
PO BOX 13010, BRIDGEPORT, CT 06673-3010
PO BOX 13011, BRIDGEPORT, CT 06673-3011
PO BOX 13012, BRIDGEPORT, CT 06673-3012
PO BOX 13013, BRIDGEPORT, CT 06673-3013
PO BOX 13014, BRIDGEPORT, CT 06673-3014
PO BOX 13015, BRIDGEPORT, CT 06673-3015
PO BOX 13016, BRIDGEPORT, CT 06673-3016
PO BOX 13017, BRIDGEPORT, CT 06673-3017
PO BOX 13018, BRIDGEPORT, CT 06673-3018
PO BOX 13019, BRIDGEPORT, CT 06673-3019
PO BOX 13020, BRIDGEPORT, CT 06673-3020
PO BOX 13021, BRIDGEPORT, CT 06673-3021
PO BOX 13022, BRIDGEPORT, CT 06673-3022
PO BOX 13023, BRIDGEPORT, CT 06673-3023
PO BOX 13024, BRIDGEPORT, CT 06673-3024
PO BOX 13025, BRIDGEPORT, CT 06673-3025
PO BOX 13026, BRIDGEPORT, CT 06673-3026
PO BOX 13027, BRIDGEPORT, CT 06673-3027
PO BOX 13028, BRIDGEPORT, CT 06673-3028
PO BOX 13029, BRIDGEPORT, CT 06673-3029
PO BOX 13030, BRIDGEPORT, CT 06673-3030
PO BOX 13031, BRIDGEPORT, CT 06673-3031
PO BOX 13032, BRIDGEPORT, CT 06673-3032
PO BOX 13033, BRIDGEPORT, CT 06673-3033
PO BOX 13034, BRIDGEPORT, CT 06673-3034
PO BOX 13035, BRIDGEPORT, CT 06673-3035
PO BOX 13036, BRIDGEPORT, CT 06673-3036
PO BOX 13037, BRIDGEPORT, CT 06673-3037
PO BOX 13038, BRIDGEPORT, CT 06673-3038
PO BOX 13039, BRIDGEPORT, CT 06673-3039
PO BOX 13040, BRIDGEPORT, CT 06673-3040
PO BOX 13041, BRIDGEPORT, CT 06673-3041
PO BOX 13042, BRIDGEPORT, CT 06673-3042
PO BOX 13043, BRIDGEPORT, CT 06673-3043
PO BOX 13044, BRIDGEPORT, CT 06673-3044
PO BOX 13045, BRIDGEPORT, CT 06673-3045
PO BOX 13046, BRIDGEPORT, CT 06673-3046
PO BOX 13047, BRIDGEPORT, CT 06673-3047
PO BOX 13048, BRIDGEPORT, CT 06673-3048
PO BOX 13049, BRIDGEPORT, CT 06673-3049
PO BOX 13050, BRIDGEPORT, CT 06673-3050
PO BOX 13051, BRIDGEPORT, CT 06673-3051
PO BOX 13052, BRIDGEPORT, CT 06673-3052
PO BOX 13053, BRIDGEPORT, CT 06673-3053
PO BOX 13054, BRIDGEPORT, CT 06673-3054
PO BOX 13055, BRIDGEPORT, CT 06673-3055
PO BOX 13056, BRIDGEPORT, CT 06673-3056
PO BOX 13057, BRIDGEPORT, CT 06673-3057
PO BOX 13058, BRIDGEPORT, CT 06673-3058
PO BOX 13059, BRIDGEPORT, CT 06673-3059
PO BOX 13060, BRIDGEPORT, CT 06673-3060
PO BOX 13061, BRIDGEPORT, CT 06673-3061
PO BOX 13062, BRIDGEPORT, CT 06673-3062
PO BOX 13063, BRIDGEPORT, CT 06673-3063
PO BOX 13064, BRIDGEPORT, CT 06673-3064
PO BOX 13065, BRIDGEPORT, CT 06673-3065
PO BOX 13066, BRIDGEPORT, CT 06673-3066
PO BOX 13067, BRIDGEPORT, CT 06673-3067
PO BOX 13068, BRIDGEPORT, CT 06673-3068
PO BOX 13069, BRIDGEPORT, CT 06673-3069
PO BOX 13070, BRIDGEPORT, CT 06673-3070
PO BOX 13071, BRIDGEPORT, CT 06673-3071
PO BOX 13072, BRIDGEPORT, CT 06673-3072
PO BOX 13073, BRIDGEPORT, CT 06673-3073
PO BOX 13074, BRIDGEPORT, CT 06673-3074
PO BOX 13075, BRIDGEPORT, CT 06673-3075
PO BOX 13076, BRIDGEPORT, CT 06673-3076
PO BOX 13077, BRIDGEPORT, CT 06673-3077
PO BOX 13078, BRIDGEPORT, CT 06673-3078
PO BOX 13079, BRIDGEPORT, CT 06673-3079
PO BOX 13080, BRIDGEPORT, CT 06673-3080
PO BOX 13081, BRIDGEPORT, CT 06673-3081
PO BOX 13082, BRIDGEPORT, CT 06673-3082
PO BOX 13083, BRIDGEPORT, CT 06673-3083
PO BOX 13084, BRIDGEPORT, CT 06673-3084
PO BOX 13085, BRIDGEPORT, CT 06673-3085
PO BOX 13086, BRIDGEPORT, CT 06673-3086
PO BOX 13087, BRIDGEPORT, CT 06673-3087
PO BOX 13088, BRIDGEPORT, CT 06673-3088
PO BOX 13089, BRIDGEPORT, CT 06673-3089
PO BOX 13090, BRIDGEPORT, CT 06673-3090
PO BOX 13091, BRIDGEPORT, CT 06673-3091
PO BOX 13092, BRIDGEPORT, CT 06673-3092
PO BOX 13093, BRIDGEPORT, CT 06673-3093
PO BOX 13094, BRIDGEPORT, CT 06673-3094
PO BOX 13095, BRIDGEPORT, CT 06673-3095
PO BOX 13096, BRIDGEPORT, CT 06673-3096
PO BOX 13097, BRIDGEPORT, CT 06673-3097
PO BOX 13098, BRIDGEPORT, CT 06673-3098
PO BOX 13099, BRIDGEPORT, CT 06673-3099
PO BOX 13100, BRIDGEPORT, CT 06673-3100
PO BOX 13101, BRIDGEPORT, CT 06673-3101
PO BOX 13102, BRIDGEPORT, CT 06673-3102
PO BOX 13103, BRIDGEPORT, CT 06673-3103
PO BOX 13104, BRIDGEPORT, CT 06673-3104
PO BOX 13105, BRIDGEPORT, CT 06673-3105
PO BOX 13106, BRIDGEPORT, CT 06673-3106
PO BOX 13107, BRIDGEPORT, CT 06673-3107
PO BOX 13108, BRIDGEPORT, CT 06673-3108
PO BOX 13109, BRIDGEPORT, CT 06673-3109
PO BOX 13110, BRIDGEPORT, CT 06673-3110
PO BOX 13111, BRIDGEPORT, CT 06673-3111
PO BOX 13112, BRIDGEPORT, CT 06673-3112
PO BOX 13113, BRIDGEPORT, CT 06673-3113
PO BOX 13114, BRIDGEPORT, CT 06673-3114
PO BOX 13115, BRIDGEPORT, CT 06673-3115
PO BOX 13116, BRIDGEPORT, CT 06673-3116
PO BOX 13117, BRIDGEPORT, CT 06673-3117
PO BOX 13118, BRIDGEPORT, CT 06673-3118
PO BOX 13119, BRIDGEPORT, CT 06673-3119
PO BOX 13120, BRIDGEPORT, CT 06673-3120
PO BOX 13121, BRIDGEPORT, CT 06673-3121
PO BOX 13122, BRIDGEPORT, CT 06673-3122
PO BOX 13123, BRIDGEPORT, CT 06673-3123
PO BOX 13124, BRIDGEPORT, CT 06673-3124
PO BOX 13125, BRIDGEPORT, CT 06673-3125
PO BOX 13126, BRIDGEPORT, CT 06673-3126
PO BOX 13127, BRIDGEPORT, CT 06673-3127
PO BOX 13128, BRIDGEPORT, CT 06673-3128
PO BOX 13129, BRIDGEPORT, CT 06673-3129
PO BOX 13130, BRIDGEPORT, CT 06673-3130
PO BOX 13131, BRIDGEPORT, CT 06673-3131
PO BOX 13132, BRIDGEPORT, CT 06673-3132
PO BOX 13133, BRIDGEPORT, CT 06673-3133
PO BOX 13134, BRIDGEPORT, CT 06673-3134
PO BOX 13135, BRIDGEPORT, CT 06673-3135
PO BOX 13136, BRIDGEPORT, CT 06673-3136
PO BOX 13137, BRIDGEPORT, CT 06673-3137
PO BOX 13138, BRIDGEPORT, CT 06673-3138
PO BOX 13139, BRIDGEPORT, CT 06673-3139
PO BOX 13140, BRIDGEPORT, CT 06673-3140
PO BOX 13141, BRIDGEPORT, CT 06673-3141
PO BOX 13142, BRIDGEPORT, CT 06673-3142
PO BOX 13143, BRIDGEPORT, CT 06673-3143
PO BOX 13144, BRIDGEPORT, CT 06673-3144
PO BOX 13145, BRIDGEPORT, CT 06673-3145
PO BOX 13146, BRIDGEPORT, CT 06673-3146
PO BOX 13147, BRIDGEPORT, CT 06673-3147
PO BOX 13148, BRIDGEPORT, CT 06673-3148
PO BOX 13149, BRIDGEPORT, CT 06673-3149
PO BOX 13150, BRIDGEPORT, CT 06673-3150
PO BOX 13151, BRIDGEPORT, CT 06673-3151
PO BOX 13152, BRIDGEPORT, CT 06673-3152
PO BOX 13153, BRIDGEPORT, CT 06673-3153
PO BOX 13154, BRIDGEPORT, CT 06673-3154
PO BOX 13155, BRIDGEPORT, CT 06673-3155
PO BOX 13156, BRIDGEPORT, CT 06673-3156
PO BOX 13157, BRIDGEPORT, CT 06673-3157
PO BOX 13158, BRIDGEPORT, CT 06673-3158
PO BOX 13159, BRIDGEPORT, CT 06673-3159
PO BOX 13160, BRIDGEPORT, CT 06673-3160
PO BOX 13161, BRIDGEPORT, CT 06673-3161
PO BOX 13162, BRIDGEPORT, CT 06673-3162
PO BOX 13163, BRIDGEPORT, CT 06673-3163
PO BOX 13164, BRIDGEPORT, CT 06673-3164
PO BOX 13165, BRIDGEPORT, CT 06673-3165
PO BOX 13166, BRIDGEPORT, CT 06673-3166
PO BOX 13167, BRIDGEPORT, CT 06673-3167
PO BOX 13168, BRIDGEPORT, CT 06673-3168
PO BOX 13169, BRIDGEPORT, CT 06673-3169
PO BOX 13170, BRIDGEPORT, CT 06673-3170
PO BOX 13171, BRIDGEPORT, CT 06673-3171
PO BOX 13172, BRIDGEPORT, CT 06673-3172
PO BOX 13173, BRIDGEPORT, CT 06673-3173
PO BOX 13174, BRIDGEPORT, CT 06673-3174
PO BOX 13175, BRIDGEPORT, CT 06673-3175
PO BOX 13176, BRIDGEPORT, CT 06673-3176
PO BOX 13177, BRIDGEPORT, CT 06673-3177
PO BOX 13178, BRIDGEPORT, CT 06673-3178
PO BOX 13179, BRIDGEPORT, CT 06673-3179
PO BOX 13180, BRIDGEPORT, CT 06673-3180
PO BOX 13181, BRIDGEPORT, CT 06673-3181
PO BOX 13182, BRIDGEPORT, CT 06673-3182
PO BOX 13183, BRIDGEPORT, CT 06673-3183
PO BOX 13184, BRIDGEPORT, CT 06673-3184
PO BOX 13185, BRIDGEPORT, CT 06673-3185
PO BOX 13186, BRIDGEPORT, CT 06673-3186
PO BOX 13187, BRIDGEPORT, CT 06673-3187
PO BOX 13188, BRIDGEPORT, CT 06673-3188
PO BOX 13189, BRIDGEPORT, CT 06673-3189
PO BOX 13190, BRIDGEPORT, CT 06673-3190
PO BOX 13191, BRIDGEPORT, CT 06673-3191
PO BOX 13192, BRIDGEPORT, CT 06673-3192
PO BOX 13193, BRIDGEPORT, CT 06673-3193
PO BOX 13194, BRIDGEPORT, CT 06673-3194
PO BOX 13195, BRIDGEPORT, CT 06673-3195
PO BOX 13196, BRIDGEPORT, CT 06673-3196
PO BOX 13197, BRIDGEPORT, CT 06673-3197
PO BOX 13198, BRIDGEPORT, CT 06673-3198
PO BOX 13199, BRIDGEPORT, CT 06673-3199
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