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, WILSONVILLE, OR 97070-0121
PO BOX 122, WILSONVILLE, OR 97070-0122
PO BOX 123, WILSONVILLE, OR 97070-0123
PO BOX 124, WILSONVILLE, OR 97070-0124
PO BOX 125, WILSONVILLE, OR 97070-0125
PO BOX 126, WILSONVILLE, OR 97070-0126
PO BOX 127, WILSONVILLE, OR 97070-0127
PO BOX 128, WILSONVILLE, OR 97070-0128
PO BOX 129, WILSONVILLE, OR 97070-0129
PO BOX 130, WILSONVILLE, OR 97070-0130
PO BOX 131, WILSONVILLE, OR 97070-0131
PO BOX 132, WILSONVILLE, OR 97070-0132
PO BOX 133, WILSONVILLE, OR 97070-0133
PO BOX 134, WILSONVILLE, OR 97070-0134
PO BOX 135, WILSONVILLE, OR 97070-0135
PO BOX 136, WILSONVILLE, OR 97070-0136
PO BOX 137, WILSONVILLE, OR 97070-0137
PO BOX 138, WILSONVILLE, OR 97070-0138
PO BOX 139, WILSONVILLE, OR 97070-0139
PO BOX 140, WILSONVILLE, OR 97070-0140
PO BOX 141, WILSONVILLE, OR 97070-0141
PO BOX 142, WILSONVILLE, OR 97070-0142
PO BOX 143, WILSONVILLE, OR 97070-0143
PO BOX 144, WILSONVILLE, OR 97070-0144
PO BOX 145, WILSONVILLE, OR 97070-0145
PO BOX 146, WILSONVILLE, OR 97070-0146
PO BOX 147, WILSONVILLE, OR 97070-0147
PO BOX 148, WILSONVILLE, OR 97070-0148
PO BOX 149, WILSONVILLE, OR 97070-0149
PO BOX 150, WILSONVILLE, OR 97070-0150
PO BOX 151, WILSONVILLE, OR 97070-0151
PO BOX 152, WILSONVILLE, OR 97070-0152
PO BOX 153, WILSONVILLE, OR 97070-0153
PO BOX 154, WILSONVILLE, OR 97070-0154
PO BOX 155, WILSONVILLE, OR 97070-0155
PO BOX 156, WILSONVILLE, OR 97070-0156
PO BOX 157, WILSONVILLE, OR 97070-0157
PO BOX 158, WILSONVILLE, OR 97070-0158
PO BOX 159, WILSONVILLE, OR 97070-0159
PO BOX 160, WILSONVILLE, OR 97070-0160
PO BOX 161, WILSONVILLE, OR 97070-0161
PO BOX 162, WILSONVILLE, OR 97070-0162
PO BOX 163, WILSONVILLE, OR 97070-0163
PO BOX 164, WILSONVILLE, OR 97070-0164
PO BOX 165, WILSONVILLE, OR 97070-0165
PO BOX 166, WILSONVILLE, OR 97070-0166
PO BOX 167, WILSONVILLE, OR 97070-0167
PO BOX 168, WILSONVILLE, OR 97070-0168
PO BOX 169, WILSONVILLE, OR 97070-0169
PO BOX 170, WILSONVILLE, OR 97070-0170
PO BOX 171, WILSONVILLE, OR 97070-0171
PO BOX 172, WILSONVILLE, OR 97070-0172
PO BOX 173, WILSONVILLE, OR 97070-0173
PO BOX 174, WILSONVILLE, OR 97070-0174
PO BOX 175, WILSONVILLE, OR 97070-0175
PO BOX 176, WILSONVILLE, OR 97070-0176
PO BOX 177, WILSONVILLE, OR 97070-0177
PO BOX 178, WILSONVILLE, OR 97070-0178
PO BOX 179, WILSONVILLE, OR 97070-0179
PO BOX 180, WILSONVILLE, OR 97070-0180
PO BOX 181, WILSONVILLE, OR 97070-0181
PO BOX 182, WILSONVILLE, OR 97070-0182
PO BOX 183, WILSONVILLE, OR 97070-0183
PO BOX 184, WILSONVILLE, OR 97070-0184
PO BOX 185, WILSONVILLE, OR 97070-0185
PO BOX 186, WILSONVILLE, OR 97070-0186
PO BOX 187, WILSONVILLE, OR 97070-0187
PO BOX 188, WILSONVILLE, OR 97070-0188
PO BOX 189, WILSONVILLE, OR 97070-0189
PO BOX 190, WILSONVILLE, OR 97070-0190
PO BOX 191, WILSONVILLE, OR 97070-0191
PO BOX 192, WILSONVILLE, OR 97070-0192
PO BOX 193, WILSONVILLE, OR 97070-0193
PO BOX 194, WILSONVILLE, OR 97070-0194
PO BOX 195, WILSONVILLE, OR 97070-0195
PO BOX 196, WILSONVILLE, OR 97070-0196
PO BOX 197, WILSONVILLE, OR 97070-0197
PO BOX 198, WILSONVILLE, OR 97070-0198
PO BOX 199, WILSONVILLE, OR 97070-0199
PO BOX 200, WILSONVILLE, OR 97070-0200
PO BOX 201, WILSONVILLE, OR 97070-0201
PO BOX 202, WILSONVILLE, OR 97070-0202
PO BOX 203, WILSONVILLE, OR 97070-0203
PO BOX 204, WILSONVILLE, OR 97070-0204
PO BOX 205, WILSONVILLE, OR 97070-0205
PO BOX 206, WILSONVILLE, OR 97070-0206
PO BOX 207, WILSONVILLE, OR 97070-0207
PO BOX 208, WILSONVILLE, OR 97070-0208
PO BOX 209, WILSONVILLE, OR 97070-0209
PO BOX 210, WILSONVILLE, OR 97070-0210
PO BOX 211, WILSONVILLE, OR 97070-0211
PO BOX 212, WILSONVILLE, OR 97070-0212
PO BOX 213, WILSONVILLE, OR 97070-0213
PO BOX 214, WILSONVILLE, OR 97070-0214
PO BOX 215, WILSONVILLE, OR 97070-0215
PO BOX 216, WILSONVILLE, OR 97070-0216
PO BOX 217, WILSONVILLE, OR 97070-0217
PO BOX 218, WILSONVILLE, OR 97070-0218
PO BOX 219, WILSONVILLE, OR 97070-0219
PO BOX 220, WILSONVILLE, OR 97070-0220
PO BOX 221, WILSONVILLE, OR 97070-0221
PO BOX 222, WILSONVILLE, OR 97070-0222
PO BOX 223, WILSONVILLE, OR 97070-0223
PO BOX 224, WILSONVILLE, OR 97070-0224
PO BOX 225, WILSONVILLE, OR 97070-0225
PO BOX 226, WILSONVILLE, OR 97070-0226
PO BOX 227, WILSONVILLE, OR 97070-0227
PO BOX 228, WILSONVILLE, OR 97070-0228
PO BOX 229, WILSONVILLE, OR 97070-0229
PO BOX 230, WILSONVILLE, OR 97070-0230
PO BOX 231, WILSONVILLE, OR 97070-0231
PO BOX 232, WILSONVILLE, OR 97070-0232
PO BOX 233, WILSONVILLE, OR 97070-0233
PO BOX 234, WILSONVILLE, OR 97070-0234
PO BOX 235, WILSONVILLE, OR 97070-0235
PO BOX 236, WILSONVILLE, OR 97070-0236
PO BOX 237, WILSONVILLE, OR 97070-0237
PO BOX 238, WILSONVILLE, OR 97070-0238
PO BOX 239, WILSONVILLE, OR 97070-0239
PO BOX 240, WILSONVILLE, OR 97070-0240
PO BOX 241, WILSONVILLE, OR 97070-0241
PO BOX 242, WILSONVILLE, OR 97070-0242
PO BOX 243, WILSONVILLE, OR 97070-0243
PO BOX 244, WILSONVILLE, OR 97070-0244
PO BOX 245, WILSONVILLE, OR 97070-0245
PO BOX 246, WILSONVILLE, OR 97070-0246
PO BOX 247, WILSONVILLE, OR 97070-0247
PO BOX 248, WILSONVILLE, OR 97070-0248
PO BOX 249, WILSONVILLE, OR 97070-0249
PO BOX 250, WILSONVILLE, OR 97070-0250
PO BOX 251, WILSONVILLE, OR 97070-0251
PO BOX 252, WILSONVILLE, OR 97070-0252
PO BOX 253, WILSONVILLE, OR 97070-0253
PO BOX 254, WILSONVILLE, OR 97070-0254
PO BOX 255, WILSONVILLE, OR 97070-0255
PO BOX 256, WILSONVILLE, OR 97070-0256
PO BOX 257, WILSONVILLE, OR 97070-0257
PO BOX 258, WILSONVILLE, OR 97070-0258
PO BOX 259, WILSONVILLE, OR 97070-0259
PO BOX 260, WILSONVILLE, OR 97070-0260
PO BOX 261, WILSONVILLE, OR 97070-0261
PO BOX 262, WILSONVILLE, OR 97070-0262
PO BOX 263, WILSONVILLE, OR 97070-0263
PO BOX 264, WILSONVILLE, OR 97070-0264
PO BOX 265, WILSONVILLE, OR 97070-0265
PO BOX 266, WILSONVILLE, OR 97070-0266
PO BOX 267, WILSONVILLE, OR 97070-0267
PO BOX 268, WILSONVILLE, OR 97070-0268
PO BOX 269, WILSONVILLE, OR 97070-0269
PO BOX 270, WILSONVILLE, OR 97070-0270
PO BOX 271, WILSONVILLE, OR 97070-0271
PO BOX 272, WILSONVILLE, OR 97070-0272
PO BOX 273, WILSONVILLE, OR 97070-0273
PO BOX 274, WILSONVILLE, OR 97070-0274
PO BOX 275, WILSONVILLE, OR 97070-0275
PO BOX 276, WILSONVILLE, OR 97070-0276
PO BOX 277, WILSONVILLE, OR 97070-0277
PO BOX 278, WILSONVILLE, OR 97070-0278
PO BOX 279, WILSONVILLE, OR 97070-0279
PO BOX 280, WILSONVILLE, OR 97070-0280
PO BOX 281, WILSONVILLE, OR 97070-0281
PO BOX 282, WILSONVILLE, OR 97070-0282
PO BOX 283, WILSONVILLE, OR 97070-0283
PO BOX 284, WILSONVILLE, OR 97070-0284
PO BOX 285, WILSONVILLE, OR 97070-0285
PO BOX 286, WILSONVILLE, OR 97070-0286
PO BOX 287, WILSONVILLE, OR 97070-0287
PO BOX 288, WILSONVILLE, OR 97070-0288
PO BOX 289, WILSONVILLE, OR 97070-0289
PO BOX 290, WILSONVILLE, OR 97070-0290
PO BOX 291, WILSONVILLE, OR 97070-0291
PO BOX 292, WILSONVILLE, OR 97070-0292
PO BOX 293, WILSONVILLE, OR 97070-0293
PO BOX 294, WILSONVILLE, OR 97070-0294
PO BOX 295, WILSONVILLE, OR 97070-0295
PO BOX 296, WILSONVILLE, OR 97070-0296
PO BOX 297, WILSONVILLE, OR 97070-0297
PO BOX 298, WILSONVILLE, OR 97070-0298
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