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 161, DECORAH, IA 52101-0161
PO BOX 162, DECORAH, IA 52101-0162
PO BOX 163, DECORAH, IA 52101-0163
PO BOX 164, DECORAH, IA 52101-0164
PO BOX 165, DECORAH, IA 52101-0165
PO BOX 166, DECORAH, IA 52101-0166
PO BOX 167, DECORAH, IA 52101-0167
PO BOX 168, DECORAH, IA 52101-0168
PO BOX 169, DECORAH, IA 52101-0169
PO BOX 170, DECORAH, IA 52101-0170
PO BOX 171, DECORAH, IA 52101-0171
PO BOX 172, DECORAH, IA 52101-0172
PO BOX 173, DECORAH, IA 52101-0173
PO BOX 174, DECORAH, IA 52101-0174
PO BOX 175, DECORAH, IA 52101-0175
PO BOX 176, DECORAH, IA 52101-0176
PO BOX 177, DECORAH, IA 52101-0177
PO BOX 178, DECORAH, IA 52101-0178
PO BOX 179, DECORAH, IA 52101-0179
PO BOX 180, DECORAH, IA 52101-0180
PO BOX 181, DECORAH, IA 52101-0181
PO BOX 182, DECORAH, IA 52101-0182
PO BOX 183, DECORAH, IA 52101-0183
PO BOX 184, DECORAH, IA 52101-0184
PO BOX 185, DECORAH, IA 52101-0185
PO BOX 186, DECORAH, IA 52101-0186
PO BOX 187, DECORAH, IA 52101-0187
PO BOX 188, DECORAH, IA 52101-0188
PO BOX 189, DECORAH, IA 52101-0189
PO BOX 190, DECORAH, IA 52101-0190
PO BOX 191, DECORAH, IA 52101-0191
PO BOX 192, DECORAH, IA 52101-0192
PO BOX 193, DECORAH, IA 52101-0193
PO BOX 194, DECORAH, IA 52101-0194
PO BOX 195, DECORAH, IA 52101-0195
PO BOX 196, DECORAH, IA 52101-0196
PO BOX 197, DECORAH, IA 52101-0197
PO BOX 198, DECORAH, IA 52101-0198
PO BOX 199, DECORAH, IA 52101-0199
PO BOX 200, DECORAH, IA 52101-0200
PO BOX 201, DECORAH, IA 52101-0201
PO BOX 202, DECORAH, IA 52101-0202
PO BOX 203, DECORAH, IA 52101-0203
PO BOX 204, DECORAH, IA 52101-0204
PO BOX 205, DECORAH, IA 52101-0205
PO BOX 206, DECORAH, IA 52101-0206
PO BOX 207, DECORAH, IA 52101-0207
PO BOX 208, DECORAH, IA 52101-0208
PO BOX 209, DECORAH, IA 52101-0209
PO BOX 210, DECORAH, IA 52101-0210
PO BOX 211, DECORAH, IA 52101-0211
PO BOX 212, DECORAH, IA 52101-0212
PO BOX 213, DECORAH, IA 52101-0213
PO BOX 214, DECORAH, IA 52101-0214
PO BOX 215, DECORAH, IA 52101-0215
PO BOX 216, DECORAH, IA 52101-0216
PO BOX 217, DECORAH, IA 52101-0217
PO BOX 218, DECORAH, IA 52101-0218
PO BOX 219, DECORAH, IA 52101-0219
PO BOX 220, DECORAH, IA 52101-0220
PO BOX 221, DECORAH, IA 52101-0221
PO BOX 222, DECORAH, IA 52101-0222
PO BOX 223, DECORAH, IA 52101-0223
PO BOX 224, DECORAH, IA 52101-0224
PO BOX 225, DECORAH, IA 52101-0225
PO BOX 226, DECORAH, IA 52101-0226
PO BOX 227, DECORAH, IA 52101-0227
PO BOX 228, DECORAH, IA 52101-0228
PO BOX 229, DECORAH, IA 52101-0229
PO BOX 230, DECORAH, IA 52101-0230
PO BOX 231, DECORAH, IA 52101-0231
PO BOX 232, DECORAH, IA 52101-0232
PO BOX 233, DECORAH, IA 52101-0233
PO BOX 234, DECORAH, IA 52101-0234
PO BOX 235, DECORAH, IA 52101-0235
PO BOX 236, DECORAH, IA 52101-0236
PO BOX 237, DECORAH, IA 52101-0237
PO BOX 238, DECORAH, IA 52101-0238
PO BOX 239, DECORAH, IA 52101-0239
PO BOX 240, DECORAH, IA 52101-0240
PO BOX 241, DECORAH, IA 52101-0241
PO BOX 242, DECORAH, IA 52101-0242
PO BOX 243, DECORAH, IA 52101-0243
PO BOX 244, DECORAH, IA 52101-0244
PO BOX 245, DECORAH, IA 52101-0245
PO BOX 246, DECORAH, IA 52101-0246
PO BOX 247, DECORAH, IA 52101-0247
PO BOX 248, DECORAH, IA 52101-0248
PO BOX 249, DECORAH, IA 52101-0249
PO BOX 250, DECORAH, IA 52101-0250
PO BOX 251, DECORAH, IA 52101-0251
PO BOX 252, DECORAH, IA 52101-0252
PO BOX 253, DECORAH, IA 52101-0253
PO BOX 254, DECORAH, IA 52101-0254
PO BOX 255, DECORAH, IA 52101-0255
PO BOX 256, DECORAH, IA 52101-0256
PO BOX 257, DECORAH, IA 52101-0257
PO BOX 258, DECORAH, IA 52101-0258
PO BOX 259, DECORAH, IA 52101-0259
PO BOX 260, DECORAH, IA 52101-0260
PO BOX 261, DECORAH, IA 52101-0261
PO BOX 262, DECORAH, IA 52101-0262
PO BOX 263, DECORAH, IA 52101-0263
PO BOX 264, DECORAH, IA 52101-0264
PO BOX 265, DECORAH, IA 52101-0265
PO BOX 266, DECORAH, IA 52101-0266
PO BOX 267, DECORAH, IA 52101-0267
PO BOX 268, DECORAH, IA 52101-0268
PO BOX 269, DECORAH, IA 52101-0269
PO BOX 270, DECORAH, IA 52101-0270
PO BOX 271, DECORAH, IA 52101-0271
PO BOX 272, DECORAH, IA 52101-0272
PO BOX 273, DECORAH, IA 52101-0273
PO BOX 274, DECORAH, IA 52101-0274
PO BOX 275, DECORAH, IA 52101-0275
PO BOX 276, DECORAH, IA 52101-0276
PO BOX 277, DECORAH, IA 52101-0277
PO BOX 278, DECORAH, IA 52101-0278
PO BOX 279, DECORAH, IA 52101-0279
PO BOX 280, DECORAH, IA 52101-0280
PO BOX 281, DECORAH, IA 52101-0281
PO BOX 282, DECORAH, IA 52101-0282
PO BOX 283, DECORAH, IA 52101-0283
PO BOX 284, DECORAH, IA 52101-0284
PO BOX 285, DECORAH, IA 52101-0285
PO BOX 286, DECORAH, IA 52101-0286
PO BOX 287, DECORAH, IA 52101-0287
PO BOX 288, DECORAH, IA 52101-0288
PO BOX 289, DECORAH, IA 52101-0289
PO BOX 290, DECORAH, IA 52101-0290
PO BOX 291, DECORAH, IA 52101-0291
PO BOX 292, DECORAH, IA 52101-0292
PO BOX 293, DECORAH, IA 52101-0293
PO BOX 294, DECORAH, IA 52101-0294
PO BOX 295, DECORAH, IA 52101-0295
PO BOX 296, DECORAH, IA 52101-0296
PO BOX 297, DECORAH, IA 52101-0297
PO BOX 298, DECORAH, IA 52101-0298
PO BOX 299, DECORAH, IA 52101-0299
PO BOX 300, DECORAH, IA 52101-0300
PO BOX 301, DECORAH, IA 52101-0301
PO BOX 302, DECORAH, IA 52101-0302
PO BOX 303, DECORAH, IA 52101-0303
PO BOX 304, DECORAH, IA 52101-0304
PO BOX 305, DECORAH, IA 52101-0305
PO BOX 306, DECORAH, IA 52101-0306
PO BOX 307, DECORAH, IA 52101-0307
PO BOX 308, DECORAH, IA 52101-0308
PO BOX 309, DECORAH, IA 52101-0309
PO BOX 310, DECORAH, IA 52101-0310
PO BOX 311, DECORAH, IA 52101-0311
PO BOX 312, DECORAH, IA 52101-0312
PO BOX 313, DECORAH, IA 52101-0313
PO BOX 314, DECORAH, IA 52101-0314
PO BOX 315, DECORAH, IA 52101-0315
PO BOX 316, DECORAH, IA 52101-0316
PO BOX 317, DECORAH, IA 52101-0317
PO BOX 318, DECORAH, IA 52101-0318
PO BOX 319, DECORAH, IA 52101-0319
PO BOX 320, DECORAH, IA 52101-0320
PO BOX 321, DECORAH, IA 52101-0321
PO BOX 322, DECORAH, IA 52101-0322
PO BOX 323, DECORAH, IA 52101-0323
PO BOX 324, DECORAH, IA 52101-0324
PO BOX 325, DECORAH, IA 52101-0325
PO BOX 326, DECORAH, IA 52101-0326
PO BOX 327, DECORAH, IA 52101-0327
PO BOX 328, DECORAH, IA 52101-0328
PO BOX 329, DECORAH, IA 52101-0329
PO BOX 330, DECORAH, IA 52101-0330
PO BOX 331, DECORAH, IA 52101-0331
PO BOX 332, DECORAH, IA 52101-0332
PO BOX 333, DECORAH, IA 52101-0333
PO BOX 334, DECORAH, IA 52101-0334
PO BOX 335, DECORAH, IA 52101-0335
PO BOX 336, DECORAH, IA 52101-0336
PO BOX 337, DECORAH, IA 52101-0337
PO BOX 338, DECORAH, IA 52101-0338
PO BOX 339, DECORAH, IA 52101-0339
PO BOX 340, DECORAH, IA 52101-0340
PO BOX 341, DECORAH, IA 52101-0341
PO BOX 342, DECORAH, IA 52101-0342
PO BOX 343, DECORAH, IA 52101-0343
PO BOX 344, DECORAH, IA 52101-0344
PO BOX 345, DECORAH, IA 52101-0345
PO BOX 346, DECORAH, IA 52101-0346
PO BOX 347, DECORAH, IA 52101-0347
PO BOX 348, DECORAH, IA 52101-0348
PO BOX 349, DECORAH, IA 52101-0349
PO BOX 350, DECORAH, IA 52101-0350
PO BOX 351, DECORAH, IA 52101-0351
PO BOX 352, DECORAH, IA 52101-0352
PO BOX 353, DECORAH, IA 52101-0353
PO BOX 354, DECORAH, IA 52101-0354
PO BOX 355, DECORAH, IA 52101-0355
PO BOX 356, DECORAH, IA 52101-0356
PO BOX 357, DECORAH, IA 52101-0357
PO BOX 358, DECORAH, IA 52101-0358
PO BOX 359, DECORAH, IA 52101-0359
PO BOX 360, DECORAH, IA 52101-0360
PO BOX 361, DECORAH, IA 52101-0361
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