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 151, BISMARCK, ND 58502-0151
PO BOX 152, BISMARCK, ND 58502-0152
PO BOX 153, BISMARCK, ND 58502-0153
PO BOX 154, BISMARCK, ND 58502-0154
PO BOX 155, BISMARCK, ND 58502-0155
PO BOX 156, BISMARCK, ND 58502-0156
PO BOX 157, BISMARCK, ND 58502-0157
PO BOX 158, BISMARCK, ND 58502-0158
PO BOX 159, BISMARCK, ND 58502-0159
PO BOX 160, BISMARCK, ND 58502-0160
PO BOX 161, BISMARCK, ND 58502-0161
PO BOX 162, BISMARCK, ND 58502-0162
PO BOX 163, BISMARCK, ND 58502-0163
PO BOX 164, BISMARCK, ND 58502-0164
PO BOX 165, BISMARCK, ND 58502-0165
PO BOX 166, BISMARCK, ND 58502-0166
PO BOX 167, BISMARCK, ND 58502-0167
PO BOX 168, BISMARCK, ND 58502-0168
PO BOX 169, BISMARCK, ND 58502-0169
PO BOX 170, BISMARCK, ND 58502-0170
PO BOX 171, BISMARCK, ND 58502-0171
PO BOX 172, BISMARCK, ND 58502-0172
PO BOX 173, BISMARCK, ND 58502-0173
PO BOX 174, BISMARCK, ND 58502-0174
PO BOX 175, BISMARCK, ND 58502-0175
PO BOX 176, BISMARCK, ND 58502-0176
PO BOX 177, BISMARCK, ND 58502-0177
PO BOX 178, BISMARCK, ND 58502-0178
PO BOX 179, BISMARCK, ND 58502-0179
PO BOX 180, BISMARCK, ND 58502-0180
PO BOX 181, BISMARCK, ND 58502-0181
PO BOX 182, BISMARCK, ND 58502-0182
PO BOX 183, BISMARCK, ND 58502-0183
PO BOX 184, BISMARCK, ND 58502-0184
PO BOX 185, BISMARCK, ND 58502-0185
PO BOX 186, BISMARCK, ND 58502-0186
PO BOX 187, BISMARCK, ND 58502-0187
PO BOX 188, BISMARCK, ND 58502-0188
PO BOX 189, BISMARCK, ND 58502-0189
PO BOX 190, BISMARCK, ND 58502-0190
PO BOX 191, BISMARCK, ND 58502-0191
PO BOX 192, BISMARCK, ND 58502-0192
PO BOX 193, BISMARCK, ND 58502-0193
PO BOX 194, BISMARCK, ND 58502-0194
PO BOX 195, BISMARCK, ND 58502-0195
PO BOX 196, BISMARCK, ND 58502-0196
PO BOX 197, BISMARCK, ND 58502-0197
PO BOX 198, BISMARCK, ND 58502-0198
PO BOX 199, BISMARCK, ND 58502-0199
PO BOX 200, BISMARCK, ND 58502-0200
PO BOX 201, BISMARCK, ND 58502-0201
PO BOX 202, BISMARCK, ND 58502-0202
PO BOX 203, BISMARCK, ND 58502-0203
PO BOX 204, BISMARCK, ND 58502-0204
PO BOX 205, BISMARCK, ND 58502-0205
PO BOX 206, BISMARCK, ND 58502-0206
PO BOX 207, BISMARCK, ND 58502-0207
PO BOX 208, BISMARCK, ND 58502-0208
PO BOX 209, BISMARCK, ND 58502-0209
PO BOX 210, BISMARCK, ND 58502-0210
PO BOX 211, BISMARCK, ND 58502-0211
PO BOX 212, BISMARCK, ND 58502-0212
PO BOX 213, BISMARCK, ND 58502-0213
PO BOX 214, BISMARCK, ND 58502-0214
PO BOX 215, BISMARCK, ND 58502-0215
PO BOX 216, BISMARCK, ND 58502-0216
PO BOX 217, BISMARCK, ND 58502-0217
PO BOX 218, BISMARCK, ND 58502-0218
PO BOX 219, BISMARCK, ND 58502-0219
PO BOX 220, BISMARCK, ND 58502-0220
PO BOX 221, BISMARCK, ND 58502-0221
PO BOX 222, BISMARCK, ND 58502-0222
PO BOX 223, BISMARCK, ND 58502-0223
PO BOX 224, BISMARCK, ND 58502-0224
PO BOX 225, BISMARCK, ND 58502-0225
PO BOX 226, BISMARCK, ND 58502-0226
PO BOX 227, BISMARCK, ND 58502-0227
PO BOX 228, BISMARCK, ND 58502-0228
PO BOX 229, BISMARCK, ND 58502-0229
PO BOX 230, BISMARCK, ND 58502-0230
PO BOX 231, BISMARCK, ND 58502-0231
PO BOX 232, BISMARCK, ND 58502-0232
PO BOX 233, BISMARCK, ND 58502-0233
PO BOX 234, BISMARCK, ND 58502-0234
PO BOX 235, BISMARCK, ND 58502-0235
PO BOX 236, BISMARCK, ND 58502-0236
PO BOX 237, BISMARCK, ND 58502-0237
PO BOX 238, BISMARCK, ND 58502-0238
PO BOX 239, BISMARCK, ND 58502-0239
PO BOX 240, BISMARCK, ND 58502-0240
PO BOX 241, BISMARCK, ND 58502-0241
PO BOX 242, BISMARCK, ND 58502-0242
PO BOX 243, BISMARCK, ND 58502-0243
PO BOX 244, BISMARCK, ND 58502-0244
PO BOX 245, BISMARCK, ND 58502-0245
PO BOX 246, BISMARCK, ND 58502-0246
PO BOX 247, BISMARCK, ND 58502-0247
PO BOX 248, BISMARCK, ND 58502-0248
PO BOX 249, BISMARCK, ND 58502-0249
PO BOX 250, BISMARCK, ND 58502-0250
PO BOX 251, BISMARCK, ND 58502-0251
PO BOX 252, BISMARCK, ND 58502-0252
PO BOX 253, BISMARCK, ND 58502-0253
PO BOX 254, BISMARCK, ND 58502-0254
PO BOX 255, BISMARCK, ND 58502-0255
PO BOX 256, BISMARCK, ND 58502-0256
PO BOX 257, BISMARCK, ND 58502-0257
PO BOX 258, BISMARCK, ND 58502-0258
PO BOX 259, BISMARCK, ND 58502-0259
PO BOX 260, BISMARCK, ND 58502-0260
PO BOX 261, BISMARCK, ND 58502-0261
PO BOX 262, BISMARCK, ND 58502-0262
PO BOX 263, BISMARCK, ND 58502-0263
PO BOX 264, BISMARCK, ND 58502-0264
PO BOX 265, BISMARCK, ND 58502-0265
PO BOX 266, BISMARCK, ND 58502-0266
PO BOX 267, BISMARCK, ND 58502-0267
PO BOX 268, BISMARCK, ND 58502-0268
PO BOX 269, BISMARCK, ND 58502-0269
PO BOX 270, BISMARCK, ND 58502-0270
PO BOX 271, BISMARCK, ND 58502-0271
PO BOX 272, BISMARCK, ND 58502-0272
PO BOX 273, BISMARCK, ND 58502-0273
PO BOX 274, BISMARCK, ND 58502-0274
PO BOX 275, BISMARCK, ND 58502-0275
PO BOX 276, BISMARCK, ND 58502-0276
PO BOX 277, BISMARCK, ND 58502-0277
PO BOX 278, BISMARCK, ND 58502-0278
PO BOX 279, BISMARCK, ND 58502-0279
PO BOX 280, BISMARCK, ND 58502-0280
PO BOX 281, BISMARCK, ND 58502-0281
PO BOX 282, BISMARCK, ND 58502-0282
PO BOX 283, BISMARCK, ND 58502-0283
PO BOX 284, BISMARCK, ND 58502-0284
PO BOX 285, BISMARCK, ND 58502-0285
PO BOX 286, BISMARCK, ND 58502-0286
PO BOX 287, BISMARCK, ND 58502-0287
PO BOX 288, BISMARCK, ND 58502-0288
PO BOX 289, BISMARCK, ND 58502-0289
PO BOX 290, BISMARCK, ND 58502-0290
PO BOX 291, BISMARCK, ND 58502-0291
PO BOX 292, BISMARCK, ND 58502-0292
PO BOX 293, BISMARCK, ND 58502-0293
PO BOX 294, BISMARCK, ND 58502-0294
PO BOX 295, BISMARCK, ND 58502-0295
PO BOX 296, BISMARCK, ND 58502-0296
PO BOX 297, BISMARCK, ND 58502-0297
PO BOX 298, BISMARCK, ND 58502-0298
PO BOX 299, BISMARCK, ND 58502-0299
PO BOX 300, BISMARCK, ND 58502-0300
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