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 116, OSKALOOSA, IA 52577-0116
PO BOX 117, OSKALOOSA, IA 52577-0117
PO BOX 118, OSKALOOSA, IA 52577-0118
PO BOX 119, OSKALOOSA, IA 52577-0119
PO BOX 120, OSKALOOSA, IA 52577-0120
PO BOX 121, OSKALOOSA, IA 52577-0121
PO BOX 122, OSKALOOSA, IA 52577-0122
PO BOX 123, OSKALOOSA, IA 52577-0123
PO BOX 124, OSKALOOSA, IA 52577-0124
PO BOX 125, OSKALOOSA, IA 52577-0125
PO BOX 126, OSKALOOSA, IA 52577-0126
PO BOX 127, OSKALOOSA, IA 52577-0127
PO BOX 128, OSKALOOSA, IA 52577-0128
PO BOX 129, OSKALOOSA, IA 52577-0129
PO BOX 130, OSKALOOSA, IA 52577-0130
PO BOX 131, OSKALOOSA, IA 52577-0131
PO BOX 132, OSKALOOSA, IA 52577-0132
PO BOX 133, OSKALOOSA, IA 52577-0133
PO BOX 134, OSKALOOSA, IA 52577-0134
PO BOX 135, OSKALOOSA, IA 52577-0135
PO BOX 136, OSKALOOSA, IA 52577-0136
PO BOX 137, OSKALOOSA, IA 52577-0137
PO BOX 138, OSKALOOSA, IA 52577-0138
PO BOX 139, OSKALOOSA, IA 52577-0139
PO BOX 140, OSKALOOSA, IA 52577-0140
PO BOX 141, OSKALOOSA, IA 52577-0141
PO BOX 142, OSKALOOSA, IA 52577-0142
PO BOX 143, OSKALOOSA, IA 52577-0143
PO BOX 144, OSKALOOSA, IA 52577-0144
PO BOX 145, OSKALOOSA, IA 52577-0145
PO BOX 146, OSKALOOSA, IA 52577-0146
PO BOX 147, OSKALOOSA, IA 52577-0147
PO BOX 148, OSKALOOSA, IA 52577-0148
PO BOX 149, OSKALOOSA, IA 52577-0149
PO BOX 150, OSKALOOSA, IA 52577-0150
PO BOX 151, OSKALOOSA, IA 52577-0151
PO BOX 152, OSKALOOSA, IA 52577-0152
PO BOX 153, OSKALOOSA, IA 52577-0153
PO BOX 154, OSKALOOSA, IA 52577-0154
PO BOX 155, OSKALOOSA, IA 52577-0155
PO BOX 156, OSKALOOSA, IA 52577-0156
PO BOX 157, OSKALOOSA, IA 52577-0157
PO BOX 158, OSKALOOSA, IA 52577-0158
PO BOX 159, OSKALOOSA, IA 52577-0159
PO BOX 160, OSKALOOSA, IA 52577-0160
PO BOX 161, OSKALOOSA, IA 52577-0161
PO BOX 162, OSKALOOSA, IA 52577-0162
PO BOX 163, OSKALOOSA, IA 52577-0163
PO BOX 164, OSKALOOSA, IA 52577-0164
PO BOX 165, OSKALOOSA, IA 52577-0165
PO BOX 166, OSKALOOSA, IA 52577-0166
PO BOX 167, OSKALOOSA, IA 52577-0167
PO BOX 168, OSKALOOSA, IA 52577-0168
PO BOX 169, OSKALOOSA, IA 52577-0169
PO BOX 170, OSKALOOSA, IA 52577-0170
PO BOX 171, OSKALOOSA, IA 52577-0171
PO BOX 172, OSKALOOSA, IA 52577-0172
PO BOX 173, OSKALOOSA, IA 52577-0173
PO BOX 174, OSKALOOSA, IA 52577-0174
PO BOX 175, OSKALOOSA, IA 52577-0175
PO BOX 176, OSKALOOSA, IA 52577-0176
PO BOX 177, OSKALOOSA, IA 52577-0177
PO BOX 178, OSKALOOSA, IA 52577-0178
PO BOX 179, OSKALOOSA, IA 52577-0179
PO BOX 180, OSKALOOSA, IA 52577-0180
PO BOX 181, OSKALOOSA, IA 52577-0181
PO BOX 182, OSKALOOSA, IA 52577-0182
PO BOX 183, OSKALOOSA, IA 52577-0183
PO BOX 184, OSKALOOSA, IA 52577-0184
PO BOX 185, OSKALOOSA, IA 52577-0185
PO BOX 186, OSKALOOSA, IA 52577-0186
PO BOX 187, OSKALOOSA, IA 52577-0187
PO BOX 188, OSKALOOSA, IA 52577-0188
PO BOX 189, OSKALOOSA, IA 52577-0189
PO BOX 190, OSKALOOSA, IA 52577-0190
PO BOX 191, OSKALOOSA, IA 52577-0191
PO BOX 192, OSKALOOSA, IA 52577-0192
PO BOX 193, OSKALOOSA, IA 52577-0193
PO BOX 194, OSKALOOSA, IA 52577-0194
PO BOX 195, OSKALOOSA, IA 52577-0195
PO BOX 196, OSKALOOSA, IA 52577-0196
PO BOX 197, OSKALOOSA, IA 52577-0197
PO BOX 198, OSKALOOSA, IA 52577-0198
PO BOX 199, OSKALOOSA, IA 52577-0199
PO BOX 200, OSKALOOSA, IA 52577-0200
PO BOX 201, OSKALOOSA, IA 52577-0201
PO BOX 202, OSKALOOSA, IA 52577-0202
PO BOX 203, OSKALOOSA, IA 52577-0203
PO BOX 204, OSKALOOSA, IA 52577-0204
PO BOX 205, OSKALOOSA, IA 52577-0205
PO BOX 206, OSKALOOSA, IA 52577-0206
PO BOX 207, OSKALOOSA, IA 52577-0207
PO BOX 208, OSKALOOSA, IA 52577-0208
PO BOX 209, OSKALOOSA, IA 52577-0209
PO BOX 210, OSKALOOSA, IA 52577-0210
PO BOX 211, OSKALOOSA, IA 52577-0211
PO BOX 212, OSKALOOSA, IA 52577-0212
PO BOX 213, OSKALOOSA, IA 52577-0213
PO BOX 214, OSKALOOSA, IA 52577-0214
PO BOX 215, OSKALOOSA, IA 52577-0215
PO BOX 216, OSKALOOSA, IA 52577-0216
PO BOX 217, OSKALOOSA, IA 52577-0217
PO BOX 218, OSKALOOSA, IA 52577-0218
PO BOX 219, OSKALOOSA, IA 52577-0219
PO BOX 220, OSKALOOSA, IA 52577-0220
PO BOX 221, OSKALOOSA, IA 52577-0221
PO BOX 222, OSKALOOSA, IA 52577-0222
PO BOX 223, OSKALOOSA, IA 52577-0223
PO BOX 224, OSKALOOSA, IA 52577-0224
PO BOX 225, OSKALOOSA, IA 52577-0225
PO BOX 226, OSKALOOSA, IA 52577-0226
PO BOX 227, OSKALOOSA, IA 52577-0227
PO BOX 228, OSKALOOSA, IA 52577-0228
PO BOX 229, OSKALOOSA, IA 52577-0229
PO BOX 230, OSKALOOSA, IA 52577-0230
PO BOX 231, OSKALOOSA, IA 52577-0231
PO BOX 232, OSKALOOSA, IA 52577-0232
PO BOX 233, OSKALOOSA, IA 52577-0233
PO BOX 234, OSKALOOSA, IA 52577-0234
PO BOX 235, OSKALOOSA, IA 52577-0235
PO BOX 236, OSKALOOSA, IA 52577-0236
PO BOX 237, OSKALOOSA, IA 52577-0237
PO BOX 238, OSKALOOSA, IA 52577-0238
PO BOX 239, OSKALOOSA, IA 52577-0239
PO BOX 240, OSKALOOSA, IA 52577-0240
PO BOX 241, OSKALOOSA, IA 52577-0241
PO BOX 242, OSKALOOSA, IA 52577-0242
PO BOX 243, OSKALOOSA, IA 52577-0243
PO BOX 244, OSKALOOSA, IA 52577-0244
PO BOX 245, OSKALOOSA, IA 52577-0245
PO BOX 246, OSKALOOSA, IA 52577-0246
PO BOX 247, OSKALOOSA, IA 52577-0247
PO BOX 248, OSKALOOSA, IA 52577-0248
PO BOX 249, OSKALOOSA, IA 52577-0249
PO BOX 250, OSKALOOSA, IA 52577-0250
PO BOX 251, OSKALOOSA, IA 52577-0251
PO BOX 252, OSKALOOSA, IA 52577-0252
PO BOX 253, OSKALOOSA, IA 52577-0253
PO BOX 254, OSKALOOSA, IA 52577-0254
PO BOX 255, OSKALOOSA, IA 52577-0255
PO BOX 256, OSKALOOSA, IA 52577-0256
PO BOX 257, OSKALOOSA, IA 52577-0257
PO BOX 258, OSKALOOSA, IA 52577-0258
PO BOX 259, OSKALOOSA, IA 52577-0259
PO BOX 260, OSKALOOSA, IA 52577-0260
PO BOX 261, OSKALOOSA, IA 52577-0261
PO BOX 262, OSKALOOSA, IA 52577-0262
PO BOX 263, OSKALOOSA, IA 52577-0263
PO BOX 264, OSKALOOSA, IA 52577-0264
PO BOX 265, OSKALOOSA, IA 52577-0265
PO BOX 266, OSKALOOSA, IA 52577-0266
PO BOX 267, OSKALOOSA, IA 52577-0267
PO BOX 268, OSKALOOSA, IA 52577-0268
PO BOX 269, OSKALOOSA, IA 52577-0269
PO BOX 270, OSKALOOSA, IA 52577-0270
PO BOX 271, OSKALOOSA, IA 52577-0271
PO BOX 272, OSKALOOSA, IA 52577-0272
PO BOX 273, OSKALOOSA, IA 52577-0273
PO BOX 274, OSKALOOSA, IA 52577-0274
PO BOX 275, OSKALOOSA, IA 52577-0275
PO BOX 276, OSKALOOSA, IA 52577-0276
PO BOX 277, OSKALOOSA, IA 52577-0277
PO BOX 278, OSKALOOSA, IA 52577-0278
PO BOX 279, OSKALOOSA, IA 52577-0279
PO BOX 280, OSKALOOSA, IA 52577-0280
PO BOX 281, OSKALOOSA, IA 52577-0281
PO BOX 282, OSKALOOSA, IA 52577-0282
PO BOX 283, OSKALOOSA, IA 52577-0283
PO BOX 284, OSKALOOSA, IA 52577-0284
PO BOX 285, OSKALOOSA, IA 52577-0285
PO BOX 286, OSKALOOSA, IA 52577-0286
PO BOX 287, OSKALOOSA, IA 52577-0287
PO BOX 288, OSKALOOSA, IA 52577-0288
PO BOX 289, OSKALOOSA, IA 52577-0289
PO BOX 290, OSKALOOSA, IA 52577-0290
PO BOX 291, OSKALOOSA, IA 52577-0291
PO BOX 292, OSKALOOSA, IA 52577-0292
PO BOX 293, OSKALOOSA, IA 52577-0293
PO BOX 294, OSKALOOSA, IA 52577-0294
PO BOX 295, OSKALOOSA, IA 52577-0295
PO BOX 296, OSKALOOSA, IA 52577-0296
PO BOX 297, OSKALOOSA, IA 52577-0297
PO BOX 298, OSKALOOSA, IA 52577-0298
PO BOX 299, OSKALOOSA, IA 52577-0299
PO BOX 300, OSKALOOSA, IA 52577-0300
PO BOX 301, OSKALOOSA, IA 52577-0301
PO BOX 302, OSKALOOSA, IA 52577-0302
PO BOX 303, OSKALOOSA, IA 52577-0303
PO BOX 304, OSKALOOSA, IA 52577-0304
PO BOX 305, OSKALOOSA, IA 52577-0305
PO BOX 306, OSKALOOSA, IA 52577-0306
PO BOX 307, OSKALOOSA, IA 52577-0307
PO BOX 308, OSKALOOSA, IA 52577-0308
PO BOX 309, OSKALOOSA, IA 52577-0309
PO BOX 310, OSKALOOSA, IA 52577-0310
PO BOX 311, OSKALOOSA, IA 52577-0311
PO BOX 312, OSKALOOSA, IA 52577-0312
PO BOX 313, OSKALOOSA, IA 52577-0313
PO BOX 314, OSKALOOSA, IA 52577-0314
PO BOX 315, OSKALOOSA, IA 52577-0315
PO BOX 316, OSKALOOSA, IA 52577-0316
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