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 14131, SPRINGFIELD, MO 65814-0131
PO BOX 14132, SPRINGFIELD, MO 65814-0132
PO BOX 14133, SPRINGFIELD, MO 65814-0133
PO BOX 14134, SPRINGFIELD, MO 65814-0134
PO BOX 14135, SPRINGFIELD, MO 65814-0135
PO BOX 14136, SPRINGFIELD, MO 65814-0136
PO BOX 14137, SPRINGFIELD, MO 65814-0137
PO BOX 14138, SPRINGFIELD, MO 65814-0138
PO BOX 14139, SPRINGFIELD, MO 65814-0139
PO BOX 14140, SPRINGFIELD, MO 65814-0140
PO BOX 14141, SPRINGFIELD, MO 65814-0141
PO BOX 14142, SPRINGFIELD, MO 65814-0142
PO BOX 14143, SPRINGFIELD, MO 65814-0143
PO BOX 14144, SPRINGFIELD, MO 65814-0144
PO BOX 14145, SPRINGFIELD, MO 65814-0145
PO BOX 14146, SPRINGFIELD, MO 65814-0146
PO BOX 14147, SPRINGFIELD, MO 65814-0147
PO BOX 14148, SPRINGFIELD, MO 65814-0148
PO BOX 14149, SPRINGFIELD, MO 65814-0149
PO BOX 14150, SPRINGFIELD, MO 65814-0150
PO BOX 14151, SPRINGFIELD, MO 65814-0151
PO BOX 14152, SPRINGFIELD, MO 65814-0152
PO BOX 14153, SPRINGFIELD, MO 65814-0153
PO BOX 14154, SPRINGFIELD, MO 65814-0154
PO BOX 14155, SPRINGFIELD, MO 65814-0155
PO BOX 14156, SPRINGFIELD, MO 65814-0156
PO BOX 14157, SPRINGFIELD, MO 65814-0157
PO BOX 14158, SPRINGFIELD, MO 65814-0158
PO BOX 14159, SPRINGFIELD, MO 65814-0159
PO BOX 14160, SPRINGFIELD, MO 65814-0160
PO BOX 14161, SPRINGFIELD, MO 65814-0161
PO BOX 14162, SPRINGFIELD, MO 65814-0162
PO BOX 14163, SPRINGFIELD, MO 65814-0163
PO BOX 14164, SPRINGFIELD, MO 65814-0164
PO BOX 14165, SPRINGFIELD, MO 65814-0165
PO BOX 14166, SPRINGFIELD, MO 65814-0166
PO BOX 14167, SPRINGFIELD, MO 65814-0167
PO BOX 14168, SPRINGFIELD, MO 65814-0168
PO BOX 14169, SPRINGFIELD, MO 65814-0169
PO BOX 14170, SPRINGFIELD, MO 65814-0170
PO BOX 14171, SPRINGFIELD, MO 65814-0171
PO BOX 14172, SPRINGFIELD, MO 65814-0172
PO BOX 14173, SPRINGFIELD, MO 65814-0173
PO BOX 14174, SPRINGFIELD, MO 65814-0174
PO BOX 14175, SPRINGFIELD, MO 65814-0175
PO BOX 14176, SPRINGFIELD, MO 65814-0176
PO BOX 14177, SPRINGFIELD, MO 65814-0177
PO BOX 14178, SPRINGFIELD, MO 65814-0178
PO BOX 14179, SPRINGFIELD, MO 65814-0179
PO BOX 14180, SPRINGFIELD, MO 65814-0180
PO BOX 14181, SPRINGFIELD, MO 65814-0181
PO BOX 14182, SPRINGFIELD, MO 65814-0182
PO BOX 14183, SPRINGFIELD, MO 65814-0183
PO BOX 14184, SPRINGFIELD, MO 65814-0184
PO BOX 14185, SPRINGFIELD, MO 65814-0185
PO BOX 14186, SPRINGFIELD, MO 65814-0186
PO BOX 14187, SPRINGFIELD, MO 65814-0187
PO BOX 14188, SPRINGFIELD, MO 65814-0188
PO BOX 14189, SPRINGFIELD, MO 65814-0189
PO BOX 14190, SPRINGFIELD, MO 65814-0190
PO BOX 14191, SPRINGFIELD, MO 65814-0191
PO BOX 14192, SPRINGFIELD, MO 65814-0192
PO BOX 14193, SPRINGFIELD, MO 65814-0193
PO BOX 14194, SPRINGFIELD, MO 65814-0194
PO BOX 14195, SPRINGFIELD, MO 65814-0195
PO BOX 14196, SPRINGFIELD, MO 65814-0196
PO BOX 14197, SPRINGFIELD, MO 65814-0197
PO BOX 14198, SPRINGFIELD, MO 65814-0198
PO BOX 14199, SPRINGFIELD, MO 65814-0199
PO BOX 14200, SPRINGFIELD, MO 65814-0200
PO BOX 14201, SPRINGFIELD, MO 65814-0201
PO BOX 14202, SPRINGFIELD, MO 65814-0202
PO BOX 14203, SPRINGFIELD, MO 65814-0203
PO BOX 14204, SPRINGFIELD, MO 65814-0204
PO BOX 14205, SPRINGFIELD, MO 65814-0205
PO BOX 14206, SPRINGFIELD, MO 65814-0206
PO BOX 14207, SPRINGFIELD, MO 65814-0207
PO BOX 14208, SPRINGFIELD, MO 65814-0208
PO BOX 14209, SPRINGFIELD, MO 65814-0209
PO BOX 14210, SPRINGFIELD, MO 65814-0210
PO BOX 14211, SPRINGFIELD, MO 65814-0211
PO BOX 14212, SPRINGFIELD, MO 65814-0212
PO BOX 14213, SPRINGFIELD, MO 65814-0213
PO BOX 14214, SPRINGFIELD, MO 65814-0214
PO BOX 14215, SPRINGFIELD, MO 65814-0215
PO BOX 14216, SPRINGFIELD, MO 65814-0216
PO BOX 14217, SPRINGFIELD, MO 65814-0217
PO BOX 14218, SPRINGFIELD, MO 65814-0218
PO BOX 14219, SPRINGFIELD, MO 65814-0219
PO BOX 14220, SPRINGFIELD, MO 65814-0220
PO BOX 14221, SPRINGFIELD, MO 65814-0221
PO BOX 14222, SPRINGFIELD, MO 65814-0222
PO BOX 14223, SPRINGFIELD, MO 65814-0223
PO BOX 14224, SPRINGFIELD, MO 65814-0224
PO BOX 14225, SPRINGFIELD, MO 65814-0225
PO BOX 14226, SPRINGFIELD, MO 65814-0226
PO BOX 14227, SPRINGFIELD, MO 65814-0227
PO BOX 14228, SPRINGFIELD, MO 65814-0228
PO BOX 14229, SPRINGFIELD, MO 65814-0229
PO BOX 14230, SPRINGFIELD, MO 65814-0230
PO BOX 14231, SPRINGFIELD, MO 65814-0231
PO BOX 14232, SPRINGFIELD, MO 65814-0232
PO BOX 14233, SPRINGFIELD, MO 65814-0233
PO BOX 14234, SPRINGFIELD, MO 65814-0234
PO BOX 14235, SPRINGFIELD, MO 65814-0235
PO BOX 14236, SPRINGFIELD, MO 65814-0236
PO BOX 14237, SPRINGFIELD, MO 65814-0237
PO BOX 14238, SPRINGFIELD, MO 65814-0238
PO BOX 14239, SPRINGFIELD, MO 65814-0239
PO BOX 14240, SPRINGFIELD, MO 65814-0240
PO BOX 14241, SPRINGFIELD, MO 65814-0241
PO BOX 14242, SPRINGFIELD, MO 65814-0242
PO BOX 14243, SPRINGFIELD, MO 65814-0243
PO BOX 14244, SPRINGFIELD, MO 65814-0244
PO BOX 14245, SPRINGFIELD, MO 65814-0245
PO BOX 14246, SPRINGFIELD, MO 65814-0246
PO BOX 14247, SPRINGFIELD, MO 65814-0247
PO BOX 14248, SPRINGFIELD, MO 65814-0248
PO BOX 14249, SPRINGFIELD, MO 65814-0249
PO BOX 14250, SPRINGFIELD, MO 65814-0250
PO BOX 14251, SPRINGFIELD, MO 65814-0251
PO BOX 14252, SPRINGFIELD, MO 65814-0252
PO BOX 14253, SPRINGFIELD, MO 65814-0253
PO BOX 14254, SPRINGFIELD, MO 65814-0254
PO BOX 14255, SPRINGFIELD, MO 65814-0255
PO BOX 14256, SPRINGFIELD, MO 65814-0256
PO BOX 14257, SPRINGFIELD, MO 65814-0257
PO BOX 14258, SPRINGFIELD, MO 65814-0258
PO BOX 14259, SPRINGFIELD, MO 65814-0259
PO BOX 14260, SPRINGFIELD, MO 65814-0260
PO BOX 14261, SPRINGFIELD, MO 65814-0261
PO BOX 14262, SPRINGFIELD, MO 65814-0262
PO BOX 14263, SPRINGFIELD, MO 65814-0263
PO BOX 14264, SPRINGFIELD, MO 65814-0264
PO BOX 14265, SPRINGFIELD, MO 65814-0265
PO BOX 14266, SPRINGFIELD, MO 65814-0266
PO BOX 14267, SPRINGFIELD, MO 65814-0267
PO BOX 14268, SPRINGFIELD, MO 65814-0268
PO BOX 14269, SPRINGFIELD, MO 65814-0269
PO BOX 14270, SPRINGFIELD, MO 65814-0270
PO BOX 14271, SPRINGFIELD, MO 65814-0271
PO BOX 14272, SPRINGFIELD, MO 65814-0272
PO BOX 14273, SPRINGFIELD, MO 65814-0273
PO BOX 14274, SPRINGFIELD, MO 65814-0274
PO BOX 14275, SPRINGFIELD, MO 65814-0275
PO BOX 14276, SPRINGFIELD, MO 65814-0276
PO BOX 14277, SPRINGFIELD, MO 65814-0277
PO BOX 14278, SPRINGFIELD, MO 65814-0278
PO BOX 14279, SPRINGFIELD, MO 65814-0279
PO BOX 14280, SPRINGFIELD, MO 65814-0280
PO BOX 14281, SPRINGFIELD, MO 65814-0281
PO BOX 14282, SPRINGFIELD, MO 65814-0282
PO BOX 14283, SPRINGFIELD, MO 65814-0283
PO BOX 14284, SPRINGFIELD, MO 65814-0284
PO BOX 14285, SPRINGFIELD, MO 65814-0285
PO BOX 14286, SPRINGFIELD, MO 65814-0286
PO BOX 14287, SPRINGFIELD, MO 65814-0287
PO BOX 14288, SPRINGFIELD, MO 65814-0288
PO BOX 14289, SPRINGFIELD, MO 65814-0289
PO BOX 14290, SPRINGFIELD, MO 65814-0290
PO BOX 14291, SPRINGFIELD, MO 65814-0291
PO BOX 14292, SPRINGFIELD, MO 65814-0292
PO BOX 14293, SPRINGFIELD, MO 65814-0293
PO BOX 14294, SPRINGFIELD, MO 65814-0294
PO BOX 14295, SPRINGFIELD, MO 65814-0295
PO BOX 14296, SPRINGFIELD, MO 65814-0296
PO BOX 14297, SPRINGFIELD, MO 65814-0297
PO BOX 14298, SPRINGFIELD, MO 65814-0298
PO BOX 14299, SPRINGFIELD, MO 65814-0299
PO BOX 14300, SPRINGFIELD, MO 65814-0300
PO BOX 14301, SPRINGFIELD, MO 65814-0301
PO BOX 14302, SPRINGFIELD, MO 65814-0302
PO BOX 14303, SPRINGFIELD, MO 65814-0303
PO BOX 14304, SPRINGFIELD, MO 65814-0304
PO BOX 14305, SPRINGFIELD, MO 65814-0305
PO BOX 14306, SPRINGFIELD, MO 65814-0306
PO BOX 14307, SPRINGFIELD, MO 65814-0307
PO BOX 14308, SPRINGFIELD, MO 65814-0308
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