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 121, CASSELTON, ND 58012-0121
PO BOX 122, CASSELTON, ND 58012-0122
PO BOX 123, CASSELTON, ND 58012-0123
PO BOX 124, CASSELTON, ND 58012-0124
PO BOX 125, CASSELTON, ND 58012-0125
PO BOX 126, CASSELTON, ND 58012-0126
PO BOX 127, CASSELTON, ND 58012-0127
PO BOX 128, CASSELTON, ND 58012-0128
PO BOX 129, CASSELTON, ND 58012-0129
PO BOX 130, CASSELTON, ND 58012-0130
PO BOX 131, CASSELTON, ND 58012-0131
PO BOX 132, CASSELTON, ND 58012-0132
PO BOX 133, CASSELTON, ND 58012-0133
PO BOX 134, CASSELTON, ND 58012-0134
PO BOX 135, CASSELTON, ND 58012-0135
PO BOX 136, CASSELTON, ND 58012-0136
PO BOX 137, CASSELTON, ND 58012-0137
PO BOX 138, CASSELTON, ND 58012-0138
PO BOX 139, CASSELTON, ND 58012-0139
PO BOX 140, CASSELTON, ND 58012-0140
PO BOX 141, CASSELTON, ND 58012-0141
PO BOX 142, CASSELTON, ND 58012-0142
PO BOX 143, CASSELTON, ND 58012-0143
PO BOX 144, CASSELTON, ND 58012-0144
PO BOX 145, CASSELTON, ND 58012-0145
PO BOX 146, CASSELTON, ND 58012-0146
PO BOX 147, CASSELTON, ND 58012-0147
PO BOX 148, CASSELTON, ND 58012-0148
PO BOX 149, CASSELTON, ND 58012-0149
PO BOX 150, CASSELTON, ND 58012-0150
PO BOX 151, CASSELTON, ND 58012-0151
PO BOX 152, CASSELTON, ND 58012-0152
PO BOX 153, CASSELTON, ND 58012-0153
PO BOX 154, CASSELTON, ND 58012-0154
PO BOX 155, CASSELTON, ND 58012-0155
PO BOX 156, CASSELTON, ND 58012-0156
PO BOX 157, CASSELTON, ND 58012-0157
PO BOX 158, CASSELTON, ND 58012-0158
PO BOX 159, CASSELTON, ND 58012-0159
PO BOX 160, CASSELTON, ND 58012-0160
PO BOX 161, CASSELTON, ND 58012-0161
PO BOX 162, CASSELTON, ND 58012-0162
PO BOX 163, CASSELTON, ND 58012-0163
PO BOX 164, CASSELTON, ND 58012-0164
PO BOX 165, CASSELTON, ND 58012-0165
PO BOX 166, CASSELTON, ND 58012-0166
PO BOX 167, CASSELTON, ND 58012-0167
PO BOX 168, CASSELTON, ND 58012-0168
PO BOX 169, CASSELTON, ND 58012-0169
PO BOX 170, CASSELTON, ND 58012-0170
PO BOX 171, CASSELTON, ND 58012-0171
PO BOX 172, CASSELTON, ND 58012-0172
PO BOX 173, CASSELTON, ND 58012-0173
PO BOX 174, CASSELTON, ND 58012-0174
PO BOX 175, CASSELTON, ND 58012-0175
PO BOX 176, CASSELTON, ND 58012-0176
PO BOX 177, CASSELTON, ND 58012-0177
PO BOX 178, CASSELTON, ND 58012-0178
PO BOX 179, CASSELTON, ND 58012-0179
PO BOX 180, CASSELTON, ND 58012-0180
PO BOX 181, CASSELTON, ND 58012-0181
PO BOX 182, CASSELTON, ND 58012-0182
PO BOX 183, CASSELTON, ND 58012-0183
PO BOX 184, CASSELTON, ND 58012-0184
PO BOX 185, CASSELTON, ND 58012-0185
PO BOX 186, CASSELTON, ND 58012-0186
PO BOX 187, CASSELTON, ND 58012-0187
PO BOX 188, CASSELTON, ND 58012-0188
PO BOX 189, CASSELTON, ND 58012-0189
PO BOX 190, CASSELTON, ND 58012-0190
PO BOX 191, CASSELTON, ND 58012-0191
PO BOX 192, CASSELTON, ND 58012-0192
PO BOX 193, CASSELTON, ND 58012-0193
PO BOX 194, CASSELTON, ND 58012-0194
PO BOX 195, CASSELTON, ND 58012-0195
PO BOX 196, CASSELTON, ND 58012-0196
PO BOX 197, CASSELTON, ND 58012-0197
PO BOX 198, CASSELTON, ND 58012-0198
PO BOX 199, CASSELTON, ND 58012-0199
PO BOX 200, CASSELTON, ND 58012-0200
PO BOX 201, CASSELTON, ND 58012-0201
PO BOX 202, CASSELTON, ND 58012-0202
PO BOX 203, CASSELTON, ND 58012-0203
PO BOX 204, CASSELTON, ND 58012-0204
PO BOX 205, CASSELTON, ND 58012-0205
PO BOX 206, CASSELTON, ND 58012-0206
PO BOX 207, CASSELTON, ND 58012-0207
PO BOX 208, CASSELTON, ND 58012-0208
PO BOX 209, CASSELTON, ND 58012-0209
PO BOX 210, CASSELTON, ND 58012-0210
PO BOX 211, CASSELTON, ND 58012-0211
PO BOX 212, CASSELTON, ND 58012-0212
PO BOX 213, CASSELTON, ND 58012-0213
PO BOX 214, CASSELTON, ND 58012-0214
PO BOX 215, CASSELTON, ND 58012-0215
PO BOX 216, CASSELTON, ND 58012-0216
PO BOX 217, CASSELTON, ND 58012-0217
PO BOX 218, CASSELTON, ND 58012-0218
PO BOX 219, CASSELTON, ND 58012-0219
PO BOX 220, CASSELTON, ND 58012-0220
PO BOX 221, CASSELTON, ND 58012-0221
PO BOX 222, CASSELTON, ND 58012-0222
PO BOX 223, CASSELTON, ND 58012-0223
PO BOX 224, CASSELTON, ND 58012-0224
PO BOX 225, CASSELTON, ND 58012-0225
PO BOX 226, CASSELTON, ND 58012-0226
PO BOX 227, CASSELTON, ND 58012-0227
PO BOX 228, CASSELTON, ND 58012-0228
PO BOX 229, CASSELTON, ND 58012-0229
PO BOX 230, CASSELTON, ND 58012-0230
PO BOX 231, CASSELTON, ND 58012-0231
PO BOX 232, CASSELTON, ND 58012-0232
PO BOX 233, CASSELTON, ND 58012-0233
PO BOX 234, CASSELTON, ND 58012-0234
PO BOX 235, CASSELTON, ND 58012-0235
PO BOX 236, CASSELTON, ND 58012-0236
PO BOX 237, CASSELTON, ND 58012-0237
PO BOX 238, CASSELTON, ND 58012-0238
PO BOX 239, CASSELTON, ND 58012-0239
PO BOX 240, CASSELTON, ND 58012-0240
PO BOX 241, CASSELTON, ND 58012-0241
PO BOX 242, CASSELTON, ND 58012-0242
PO BOX 243, CASSELTON, ND 58012-0243
PO BOX 244, CASSELTON, ND 58012-0244
PO BOX 245, CASSELTON, ND 58012-0245
PO BOX 246, CASSELTON, ND 58012-0246
PO BOX 247, CASSELTON, ND 58012-0247
PO BOX 248, CASSELTON, ND 58012-0248
PO BOX 249, CASSELTON, ND 58012-0249
PO BOX 250, CASSELTON, ND 58012-0250
PO BOX 251, CASSELTON, ND 58012-0251
PO BOX 252, CASSELTON, ND 58012-0252
PO BOX 253, CASSELTON, ND 58012-0253
PO BOX 254, CASSELTON, ND 58012-0254
PO BOX 255, CASSELTON, ND 58012-0255
PO BOX 256, CASSELTON, ND 58012-0256
PO BOX 257, CASSELTON, ND 58012-0257
PO BOX 258, CASSELTON, ND 58012-0258
PO BOX 259, CASSELTON, ND 58012-0259
PO BOX 260, CASSELTON, ND 58012-0260
PO BOX 261, CASSELTON, ND 58012-0261
PO BOX 262, CASSELTON, ND 58012-0262
PO BOX 263, CASSELTON, ND 58012-0263
PO BOX 264, CASSELTON, ND 58012-0264
PO BOX 265, CASSELTON, ND 58012-0265
PO BOX 266, CASSELTON, ND 58012-0266
PO BOX 267, CASSELTON, ND 58012-0267
PO BOX 268, CASSELTON, ND 58012-0268
PO BOX 269, CASSELTON, ND 58012-0269
PO BOX 270, CASSELTON, ND 58012-0270
PO BOX 271, CASSELTON, ND 58012-0271
PO BOX 272, CASSELTON, ND 58012-0272
PO BOX 273, CASSELTON, ND 58012-0273
PO BOX 274, CASSELTON, ND 58012-0274
PO BOX 275, CASSELTON, ND 58012-0275
PO BOX 276, CASSELTON, ND 58012-0276
PO BOX 277, CASSELTON, ND 58012-0277
PO BOX 278, CASSELTON, ND 58012-0278
PO BOX 279, CASSELTON, ND 58012-0279
PO BOX 280, CASSELTON, ND 58012-0280
PO BOX 281, CASSELTON, ND 58012-0281
PO BOX 282, CASSELTON, ND 58012-0282
PO BOX 283, CASSELTON, ND 58012-0283
PO BOX 284, CASSELTON, ND 58012-0284
PO BOX 285, CASSELTON, ND 58012-0285
PO BOX 286, CASSELTON, ND 58012-0286
PO BOX 287, CASSELTON, ND 58012-0287
PO BOX 288, CASSELTON, ND 58012-0288
PO BOX 289, CASSELTON, ND 58012-0289
PO BOX 290, CASSELTON, ND 58012-0290
PO BOX 291, CASSELTON, ND 58012-0291
PO BOX 292, CASSELTON, ND 58012-0292
PO BOX 293, CASSELTON, ND 58012-0293
PO BOX 294, CASSELTON, ND 58012-0294
PO BOX 295, CASSELTON, ND 58012-0295
PO BOX 296, CASSELTON, ND 58012-0296
PO BOX 297, CASSELTON, ND 58012-0297
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