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 3121, ELIZABETHTOWN, NC 28337-3121
PO BOX 3122, ELIZABETHTOWN, NC 28337-3122
PO BOX 3123, ELIZABETHTOWN, NC 28337-3123
PO BOX 3124, ELIZABETHTOWN, NC 28337-3124
PO BOX 3125, ELIZABETHTOWN, NC 28337-3125
PO BOX 3126, ELIZABETHTOWN, NC 28337-3126
PO BOX 3127, ELIZABETHTOWN, NC 28337-3127
PO BOX 3128, ELIZABETHTOWN, NC 28337-3128
PO BOX 3129, ELIZABETHTOWN, NC 28337-3129
PO BOX 3130, ELIZABETHTOWN, NC 28337-3130
PO BOX 3131, ELIZABETHTOWN, NC 28337-3131
PO BOX 3132, ELIZABETHTOWN, NC 28337-3132
PO BOX 3133, ELIZABETHTOWN, NC 28337-3133
PO BOX 3134, ELIZABETHTOWN, NC 28337-3134
PO BOX 3135, ELIZABETHTOWN, NC 28337-3135
PO BOX 3136, ELIZABETHTOWN, NC 28337-3136
PO BOX 3137, ELIZABETHTOWN, NC 28337-3137
PO BOX 3138, ELIZABETHTOWN, NC 28337-3138
PO BOX 3139, ELIZABETHTOWN, NC 28337-3139
PO BOX 3140, ELIZABETHTOWN, NC 28337-3140
PO BOX 3141, ELIZABETHTOWN, NC 28337-3141
PO BOX 3142, ELIZABETHTOWN, NC 28337-3142
PO BOX 3143, ELIZABETHTOWN, NC 28337-3143
PO BOX 3144, ELIZABETHTOWN, NC 28337-3144
PO BOX 3145, ELIZABETHTOWN, NC 28337-3145
PO BOX 3146, ELIZABETHTOWN, NC 28337-3146
PO BOX 3147, ELIZABETHTOWN, NC 28337-3147
PO BOX 3148, ELIZABETHTOWN, NC 28337-3148
PO BOX 3149, ELIZABETHTOWN, NC 28337-3149
PO BOX 3150, ELIZABETHTOWN, NC 28337-3150
PO BOX 3151, ELIZABETHTOWN, NC 28337-3151
PO BOX 3152, ELIZABETHTOWN, NC 28337-3152
PO BOX 3153, ELIZABETHTOWN, NC 28337-3153
PO BOX 3154, ELIZABETHTOWN, NC 28337-3154
PO BOX 3155, ELIZABETHTOWN, NC 28337-3155
PO BOX 3156, ELIZABETHTOWN, NC 28337-3156
PO BOX 3157, ELIZABETHTOWN, NC 28337-3157
PO BOX 3158, ELIZABETHTOWN, NC 28337-3158
PO BOX 3159, ELIZABETHTOWN, NC 28337-3159
PO BOX 3160, ELIZABETHTOWN, NC 28337-3160
PO BOX 3161, ELIZABETHTOWN, NC 28337-3161
PO BOX 3162, ELIZABETHTOWN, NC 28337-3162
PO BOX 3163, ELIZABETHTOWN, NC 28337-3163
PO BOX 3164, ELIZABETHTOWN, NC 28337-3164
PO BOX 3165, ELIZABETHTOWN, NC 28337-3165
PO BOX 3166, ELIZABETHTOWN, NC 28337-3166
PO BOX 3167, ELIZABETHTOWN, NC 28337-3167
PO BOX 3168, ELIZABETHTOWN, NC 28337-3168
PO BOX 3169, ELIZABETHTOWN, NC 28337-3169
PO BOX 3170, ELIZABETHTOWN, NC 28337-3170
PO BOX 3171, ELIZABETHTOWN, NC 28337-3171
PO BOX 3172, ELIZABETHTOWN, NC 28337-3172
PO BOX 3173, ELIZABETHTOWN, NC 28337-3173
PO BOX 3174, ELIZABETHTOWN, NC 28337-3174
PO BOX 3175, ELIZABETHTOWN, NC 28337-3175
PO BOX 3176, ELIZABETHTOWN, NC 28337-3176
PO BOX 3177, ELIZABETHTOWN, NC 28337-3177
PO BOX 3178, ELIZABETHTOWN, NC 28337-3178
PO BOX 3179, ELIZABETHTOWN, NC 28337-3179
PO BOX 3180, ELIZABETHTOWN, NC 28337-3180
PO BOX 3181, ELIZABETHTOWN, NC 28337-3181
PO BOX 3182, ELIZABETHTOWN, NC 28337-3182
PO BOX 3183, ELIZABETHTOWN, NC 28337-3183
PO BOX 3184, ELIZABETHTOWN, NC 28337-3184
PO BOX 3185, ELIZABETHTOWN, NC 28337-3185
PO BOX 3186, ELIZABETHTOWN, NC 28337-3186
PO BOX 3187, ELIZABETHTOWN, NC 28337-3187
PO BOX 3188, ELIZABETHTOWN, NC 28337-3188
PO BOX 3189, ELIZABETHTOWN, NC 28337-3189
PO BOX 3190, ELIZABETHTOWN, NC 28337-3190
PO BOX 3191, ELIZABETHTOWN, NC 28337-3191
PO BOX 3192, ELIZABETHTOWN, NC 28337-3192
PO BOX 3193, ELIZABETHTOWN, NC 28337-3193
PO BOX 3194, ELIZABETHTOWN, NC 28337-3194
PO BOX 3195, ELIZABETHTOWN, NC 28337-3195
PO BOX 3196, ELIZABETHTOWN, NC 28337-3196
PO BOX 3197, ELIZABETHTOWN, NC 28337-3197
PO BOX 3198, ELIZABETHTOWN, NC 28337-3198
PO BOX 3199, ELIZABETHTOWN, NC 28337-3199
PO BOX 3200, ELIZABETHTOWN, NC 28337-3200
PO BOX 3201, ELIZABETHTOWN, NC 28337-3201
PO BOX 3202, ELIZABETHTOWN, NC 28337-3202
PO BOX 3203, ELIZABETHTOWN, NC 28337-3203
PO BOX 3204, ELIZABETHTOWN, NC 28337-3204
PO BOX 3205, ELIZABETHTOWN, NC 28337-3205
PO BOX 3206, ELIZABETHTOWN, NC 28337-3206
PO BOX 3207, ELIZABETHTOWN, NC 28337-3207
PO BOX 3208, ELIZABETHTOWN, NC 28337-3208
PO BOX 3209, ELIZABETHTOWN, NC 28337-3209
PO BOX 3210, ELIZABETHTOWN, NC 28337-3210
PO BOX 3211, ELIZABETHTOWN, NC 28337-3211
PO BOX 3212, ELIZABETHTOWN, NC 28337-3212
PO BOX 3213, ELIZABETHTOWN, NC 28337-3213
PO BOX 3214, ELIZABETHTOWN, NC 28337-3214
PO BOX 3215, ELIZABETHTOWN, NC 28337-3215
PO BOX 3216, ELIZABETHTOWN, NC 28337-3216
PO BOX 3217, ELIZABETHTOWN, NC 28337-3217
PO BOX 3218, ELIZABETHTOWN, NC 28337-3218
PO BOX 3219, ELIZABETHTOWN, NC 28337-3219
PO BOX 3220, ELIZABETHTOWN, NC 28337-3220
PO BOX 3221, ELIZABETHTOWN, NC 28337-3221
PO BOX 3222, ELIZABETHTOWN, NC 28337-3222
PO BOX 3223, ELIZABETHTOWN, NC 28337-3223
PO BOX 3224, ELIZABETHTOWN, NC 28337-3224
PO BOX 3225, ELIZABETHTOWN, NC 28337-3225
PO BOX 3226, ELIZABETHTOWN, NC 28337-3226
PO BOX 3227, ELIZABETHTOWN, NC 28337-3227
PO BOX 3228, ELIZABETHTOWN, NC 28337-3228
PO BOX 3229, ELIZABETHTOWN, NC 28337-3229
PO BOX 3230, ELIZABETHTOWN, NC 28337-3230
PO BOX 3231, ELIZABETHTOWN, NC 28337-3231
PO BOX 3232, ELIZABETHTOWN, NC 28337-3232
PO BOX 3233, ELIZABETHTOWN, NC 28337-3233
PO BOX 3234, ELIZABETHTOWN, NC 28337-3234
PO BOX 3235, ELIZABETHTOWN, NC 28337-3235
PO BOX 3236, ELIZABETHTOWN, NC 28337-3236
PO BOX 3237, ELIZABETHTOWN, NC 28337-3237
PO BOX 3238, ELIZABETHTOWN, NC 28337-3238
PO BOX 3239, ELIZABETHTOWN, NC 28337-3239
PO BOX 3240, ELIZABETHTOWN, NC 28337-3240
PO BOX 3241, ELIZABETHTOWN, NC 28337-3241
PO BOX 3242, ELIZABETHTOWN, NC 28337-3242
PO BOX 3243, ELIZABETHTOWN, NC 28337-3243
PO BOX 3244, ELIZABETHTOWN, NC 28337-3244
PO BOX 3245, ELIZABETHTOWN, NC 28337-3245
PO BOX 3246, ELIZABETHTOWN, NC 28337-3246
PO BOX 3247, ELIZABETHTOWN, NC 28337-3247
PO BOX 3248, ELIZABETHTOWN, NC 28337-3248
PO BOX 3249, ELIZABETHTOWN, NC 28337-3249
PO BOX 3250, ELIZABETHTOWN, NC 28337-3250
PO BOX 3251, ELIZABETHTOWN, NC 28337-3251
PO BOX 3252, ELIZABETHTOWN, NC 28337-3252
PO BOX 3253, ELIZABETHTOWN, NC 28337-3253
PO BOX 3254, ELIZABETHTOWN, NC 28337-3254
PO BOX 3255, ELIZABETHTOWN, NC 28337-3255
PO BOX 3256, ELIZABETHTOWN, NC 28337-3256
PO BOX 3257, ELIZABETHTOWN, NC 28337-3257
PO BOX 3258, ELIZABETHTOWN, NC 28337-3258
PO BOX 3259, ELIZABETHTOWN, NC 28337-3259
PO BOX 3260, ELIZABETHTOWN, NC 28337-3260
PO BOX 3261, ELIZABETHTOWN, NC 28337-3261
PO BOX 3262, ELIZABETHTOWN, NC 28337-3262
PO BOX 3263, ELIZABETHTOWN, NC 28337-3263
PO BOX 3264, ELIZABETHTOWN, NC 28337-3264
PO BOX 3265, ELIZABETHTOWN, NC 28337-3265
PO BOX 3266, ELIZABETHTOWN, NC 28337-3266
PO BOX 3267, ELIZABETHTOWN, NC 28337-3267
PO BOX 3268, ELIZABETHTOWN, NC 28337-3268
PO BOX 3269, ELIZABETHTOWN, NC 28337-3269
PO BOX 3270, ELIZABETHTOWN, NC 28337-3270
PO BOX 3271, ELIZABETHTOWN, NC 28337-3271
PO BOX 3272, ELIZABETHTOWN, NC 28337-3272
PO BOX 3273, ELIZABETHTOWN, NC 28337-3273
PO BOX 3274, ELIZABETHTOWN, NC 28337-3274
PO BOX 3275, ELIZABETHTOWN, NC 28337-3275
PO BOX 3276, ELIZABETHTOWN, NC 28337-3276
PO BOX 3277, ELIZABETHTOWN, NC 28337-3277
PO BOX 3278, ELIZABETHTOWN, NC 28337-3278
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