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, MILFORD, IA 51351-0121
PO BOX 122, MILFORD, IA 51351-0122
PO BOX 123, MILFORD, IA 51351-0123
PO BOX 124, MILFORD, IA 51351-0124
PO BOX 125, MILFORD, IA 51351-0125
PO BOX 126, MILFORD, IA 51351-0126
PO BOX 127, MILFORD, IA 51351-0127
PO BOX 128, MILFORD, IA 51351-0128
PO BOX 129, MILFORD, IA 51351-0129
PO BOX 130, MILFORD, IA 51351-0130
PO BOX 131, MILFORD, IA 51351-0131
PO BOX 132, MILFORD, IA 51351-0132
PO BOX 133, MILFORD, IA 51351-0133
PO BOX 134, MILFORD, IA 51351-0134
PO BOX 135, MILFORD, IA 51351-0135
PO BOX 136, MILFORD, IA 51351-0136
PO BOX 137, MILFORD, IA 51351-0137
PO BOX 138, MILFORD, IA 51351-0138
PO BOX 139, MILFORD, IA 51351-0139
PO BOX 140, MILFORD, IA 51351-0140
PO BOX 141, MILFORD, IA 51351-0141
PO BOX 142, MILFORD, IA 51351-0142
PO BOX 143, MILFORD, IA 51351-0143
PO BOX 144, MILFORD, IA 51351-0144
PO BOX 145, MILFORD, IA 51351-0145
PO BOX 146, MILFORD, IA 51351-0146
PO BOX 147, MILFORD, IA 51351-0147
PO BOX 148, MILFORD, IA 51351-0148
PO BOX 149, MILFORD, IA 51351-0149
PO BOX 150, MILFORD, IA 51351-0150
PO BOX 151, MILFORD, IA 51351-0151
PO BOX 152, MILFORD, IA 51351-0152
PO BOX 153, MILFORD, IA 51351-0153
PO BOX 154, MILFORD, IA 51351-0154
PO BOX 155, MILFORD, IA 51351-0155
PO BOX 156, MILFORD, IA 51351-0156
PO BOX 157, MILFORD, IA 51351-0157
PO BOX 158, MILFORD, IA 51351-0158
PO BOX 159, MILFORD, IA 51351-0159
PO BOX 160, MILFORD, IA 51351-0160
PO BOX 161, MILFORD, IA 51351-0161
PO BOX 162, MILFORD, IA 51351-0162
PO BOX 163, MILFORD, IA 51351-0163
PO BOX 164, MILFORD, IA 51351-0164
PO BOX 165, MILFORD, IA 51351-0165
PO BOX 166, MILFORD, IA 51351-0166
PO BOX 167, MILFORD, IA 51351-0167
PO BOX 168, MILFORD, IA 51351-0168
PO BOX 169, MILFORD, IA 51351-0169
PO BOX 170, MILFORD, IA 51351-0170
PO BOX 171, MILFORD, IA 51351-0171
PO BOX 172, MILFORD, IA 51351-0172
PO BOX 173, MILFORD, IA 51351-0173
PO BOX 174, MILFORD, IA 51351-0174
PO BOX 175, MILFORD, IA 51351-0175
PO BOX 176, MILFORD, IA 51351-0176
PO BOX 177, MILFORD, IA 51351-0177
PO BOX 178, MILFORD, IA 51351-0178
PO BOX 179, MILFORD, IA 51351-0179
PO BOX 180, MILFORD, IA 51351-0180
PO BOX 181, MILFORD, IA 51351-0181
PO BOX 182, MILFORD, IA 51351-0182
PO BOX 183, MILFORD, IA 51351-0183
PO BOX 184, MILFORD, IA 51351-0184
PO BOX 185, MILFORD, IA 51351-0185
PO BOX 186, MILFORD, IA 51351-0186
PO BOX 187, MILFORD, IA 51351-0187
PO BOX 188, MILFORD, IA 51351-0188
PO BOX 189, MILFORD, IA 51351-0189
PO BOX 190, MILFORD, IA 51351-0190
PO BOX 191, MILFORD, IA 51351-0191
PO BOX 192, MILFORD, IA 51351-0192
PO BOX 193, MILFORD, IA 51351-0193
PO BOX 194, MILFORD, IA 51351-0194
PO BOX 195, MILFORD, IA 51351-0195
PO BOX 196, MILFORD, IA 51351-0196
PO BOX 197, MILFORD, IA 51351-0197
PO BOX 198, MILFORD, IA 51351-0198
PO BOX 199, MILFORD, IA 51351-0199
PO BOX 200, MILFORD, IA 51351-0200
PO BOX 201, MILFORD, IA 51351-0201
PO BOX 202, MILFORD, IA 51351-0202
PO BOX 203, MILFORD, IA 51351-0203
PO BOX 204, MILFORD, IA 51351-0204
PO BOX 205, MILFORD, IA 51351-0205
PO BOX 206, MILFORD, IA 51351-0206
PO BOX 207, MILFORD, IA 51351-0207
PO BOX 208, MILFORD, IA 51351-0208
PO BOX 209, MILFORD, IA 51351-0209
PO BOX 210, MILFORD, IA 51351-0210
PO BOX 211, MILFORD, IA 51351-0211
PO BOX 212, MILFORD, IA 51351-0212
PO BOX 213, MILFORD, IA 51351-0213
PO BOX 214, MILFORD, IA 51351-0214
PO BOX 215, MILFORD, IA 51351-0215
PO BOX 216, MILFORD, IA 51351-0216
PO BOX 217, MILFORD, IA 51351-0217
PO BOX 218, MILFORD, IA 51351-0218
PO BOX 219, MILFORD, IA 51351-0219
PO BOX 220, MILFORD, IA 51351-0220
PO BOX 221, MILFORD, IA 51351-0221
PO BOX 222, MILFORD, IA 51351-0222
PO BOX 223, MILFORD, IA 51351-0223
PO BOX 224, MILFORD, IA 51351-0224
PO BOX 225, MILFORD, IA 51351-0225
PO BOX 226, MILFORD, IA 51351-0226
PO BOX 227, MILFORD, IA 51351-0227
PO BOX 228, MILFORD, IA 51351-0228
PO BOX 229, MILFORD, IA 51351-0229
PO BOX 230, MILFORD, IA 51351-0230
PO BOX 231, MILFORD, IA 51351-0231
PO BOX 232, MILFORD, IA 51351-0232
PO BOX 233, MILFORD, IA 51351-0233
PO BOX 234, MILFORD, IA 51351-0234
PO BOX 235, MILFORD, IA 51351-0235
PO BOX 236, MILFORD, IA 51351-0236
PO BOX 237, MILFORD, IA 51351-0237
PO BOX 238, MILFORD, IA 51351-0238
PO BOX 239, MILFORD, IA 51351-0239
PO BOX 240, MILFORD, IA 51351-0240
PO BOX 241, MILFORD, IA 51351-0241
PO BOX 242, MILFORD, IA 51351-0242
PO BOX 243, MILFORD, IA 51351-0243
PO BOX 244, MILFORD, IA 51351-0244
PO BOX 245, MILFORD, IA 51351-0245
PO BOX 246, MILFORD, IA 51351-0246
PO BOX 247, MILFORD, IA 51351-0247
PO BOX 248, MILFORD, IA 51351-0248
PO BOX 249, MILFORD, IA 51351-0249
PO BOX 250, MILFORD, IA 51351-0250
PO BOX 251, MILFORD, IA 51351-0251
PO BOX 252, MILFORD, IA 51351-0252
PO BOX 253, MILFORD, IA 51351-0253
PO BOX 254, MILFORD, IA 51351-0254
PO BOX 255, MILFORD, IA 51351-0255
PO BOX 256, MILFORD, IA 51351-0256
PO BOX 257, MILFORD, IA 51351-0257
PO BOX 258, MILFORD, IA 51351-0258
PO BOX 259, MILFORD, IA 51351-0259
PO BOX 260, MILFORD, IA 51351-0260
PO BOX 261, MILFORD, IA 51351-0261
PO BOX 262, MILFORD, IA 51351-0262
PO BOX 263, MILFORD, IA 51351-0263
PO BOX 264, MILFORD, IA 51351-0264
PO BOX 265, MILFORD, IA 51351-0265
PO BOX 266, MILFORD, IA 51351-0266
PO BOX 267, MILFORD, IA 51351-0267
PO BOX 268, MILFORD, IA 51351-0268
PO BOX 269, MILFORD, IA 51351-0269
PO BOX 270, MILFORD, IA 51351-0270
PO BOX 271, MILFORD, IA 51351-0271
PO BOX 272, MILFORD, IA 51351-0272
PO BOX 273, MILFORD, IA 51351-0273
PO BOX 274, MILFORD, IA 51351-0274
PO BOX 275, MILFORD, IA 51351-0275
PO BOX 276, MILFORD, IA 51351-0276
PO BOX 277, MILFORD, IA 51351-0277
PO BOX 278, MILFORD, IA 51351-0278
PO BOX 279, MILFORD, IA 51351-0279
PO BOX 280, MILFORD, IA 51351-0280
PO BOX 281, MILFORD, IA 51351-0281
PO BOX 282, MILFORD, IA 51351-0282
PO BOX 283, MILFORD, IA 51351-0283
PO BOX 284, MILFORD, IA 51351-0284
PO BOX 285, MILFORD, IA 51351-0285
PO BOX 286, MILFORD, IA 51351-0286
PO BOX 287, MILFORD, IA 51351-0287
PO BOX 288, MILFORD, IA 51351-0288
PO BOX 289, MILFORD, IA 51351-0289
PO BOX 290, MILFORD, IA 51351-0290
PO BOX 291, MILFORD, IA 51351-0291
PO BOX 292, MILFORD, IA 51351-0292
PO BOX 293, MILFORD, IA 51351-0293
PO BOX 294, MILFORD, IA 51351-0294
PO BOX 295, MILFORD, IA 51351-0295
PO BOX 296, MILFORD, IA 51351-0296
PO BOX 297, MILFORD, IA 51351-0297
PO BOX 298, MILFORD, IA 51351-0298
PO BOX 299, MILFORD, IA 51351-0299
PO BOX 300, MILFORD, IA 51351-0300
PO BOX 301, MILFORD, IA 51351-0301
PO BOX 302, MILFORD, IA 51351-0302
PO BOX 303, MILFORD, IA 51351-0303
PO BOX 304, MILFORD, IA 51351-0304
PO BOX 305, MILFORD, IA 51351-0305
PO BOX 306, MILFORD, IA 51351-0306
PO BOX 307, MILFORD, IA 51351-0307
PO BOX 308, MILFORD, IA 51351-0308
PO BOX 309, MILFORD, IA 51351-0309
PO BOX 310, MILFORD, IA 51351-0310
PO BOX 311, MILFORD, IA 51351-0311
PO BOX 312, MILFORD, IA 51351-0312
PO BOX 313, MILFORD, IA 51351-0313
PO BOX 314, MILFORD, IA 51351-0314
PO BOX 315, MILFORD, IA 51351-0315
PO BOX 316, MILFORD, IA 51351-0316
Add new comment