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 4201, SPRINGFIELD, MO 65808-4201
PO BOX 4202, SPRINGFIELD, MO 65808-4202
PO BOX 4203, SPRINGFIELD, MO 65808-4203
PO BOX 4204, SPRINGFIELD, MO 65808-4204
PO BOX 4205, SPRINGFIELD, MO 65808-4205
PO BOX 4206, SPRINGFIELD, MO 65808-4206
PO BOX 4207, SPRINGFIELD, MO 65808-4207
PO BOX 4208, SPRINGFIELD, MO 65808-4208
PO BOX 4209, SPRINGFIELD, MO 65808-4209
PO BOX 4210, SPRINGFIELD, MO 65808-4210
PO BOX 4211, SPRINGFIELD, MO 65808-4211
PO BOX 4212, SPRINGFIELD, MO 65808-4212
PO BOX 4213, SPRINGFIELD, MO 65808-4213
PO BOX 4214, SPRINGFIELD, MO 65808-4214
PO BOX 4215, SPRINGFIELD, MO 65808-4215
PO BOX 4216, SPRINGFIELD, MO 65808-4216
PO BOX 4217, SPRINGFIELD, MO 65808-4217
PO BOX 4218, SPRINGFIELD, MO 65808-4218
PO BOX 4219, SPRINGFIELD, MO 65808-4219
PO BOX 4220, SPRINGFIELD, MO 65808-4220
PO BOX 4221, SPRINGFIELD, MO 65808-4221
PO BOX 4222, SPRINGFIELD, MO 65808-4222
PO BOX 4223, SPRINGFIELD, MO 65808-4223
PO BOX 4224, SPRINGFIELD, MO 65808-4224
PO BOX 4225, SPRINGFIELD, MO 65808-4225
PO BOX 4226, SPRINGFIELD, MO 65808-4226
PO BOX 4227, SPRINGFIELD, MO 65808-4227
PO BOX 4228, SPRINGFIELD, MO 65808-4228
PO BOX 4229, SPRINGFIELD, MO 65808-4229
PO BOX 4230, SPRINGFIELD, MO 65808-4230
PO BOX 4231, SPRINGFIELD, MO 65808-4231
PO BOX 4232, SPRINGFIELD, MO 65808-4232
PO BOX 4233, SPRINGFIELD, MO 65808-4233
PO BOX 4234, SPRINGFIELD, MO 65808-4234
PO BOX 4235, SPRINGFIELD, MO 65808-4235
PO BOX 4236, SPRINGFIELD, MO 65808-4236
PO BOX 4237, SPRINGFIELD, MO 65808-4237
PO BOX 4238, SPRINGFIELD, MO 65808-4238
PO BOX 4239, SPRINGFIELD, MO 65808-4239
PO BOX 4240, SPRINGFIELD, MO 65808-4240
PO BOX 4241, SPRINGFIELD, MO 65808-4241
PO BOX 4242, SPRINGFIELD, MO 65808-4242
PO BOX 4243, SPRINGFIELD, MO 65808-4243
PO BOX 4244, SPRINGFIELD, MO 65808-4244
PO BOX 4245, SPRINGFIELD, MO 65808-4245
PO BOX 4246, SPRINGFIELD, MO 65808-4246
PO BOX 4247, SPRINGFIELD, MO 65808-4247
PO BOX 4248, SPRINGFIELD, MO 65808-4248
PO BOX 4249, SPRINGFIELD, MO 65808-4249
PO BOX 4250, SPRINGFIELD, MO 65808-4250
PO BOX 4251, SPRINGFIELD, MO 65808-4251
PO BOX 4252, SPRINGFIELD, MO 65808-4252
PO BOX 4253, SPRINGFIELD, MO 65808-4253
PO BOX 4254, SPRINGFIELD, MO 65808-4254
PO BOX 4255, SPRINGFIELD, MO 65808-4255
PO BOX 4256, SPRINGFIELD, MO 65808-4256
PO BOX 4257, SPRINGFIELD, MO 65808-4257
PO BOX 4258, SPRINGFIELD, MO 65808-4258
PO BOX 4259, SPRINGFIELD, MO 65808-4259
PO BOX 4260, SPRINGFIELD, MO 65808-4260
PO BOX 4261, SPRINGFIELD, MO 65808-4261
PO BOX 4262, SPRINGFIELD, MO 65808-4262
PO BOX 4263, SPRINGFIELD, MO 65808-4263
PO BOX 4264, SPRINGFIELD, MO 65808-4264
PO BOX 4265, SPRINGFIELD, MO 65808-4265
PO BOX 4266, SPRINGFIELD, MO 65808-4266
PO BOX 4267, SPRINGFIELD, MO 65808-4267
PO BOX 4268, SPRINGFIELD, MO 65808-4268
PO BOX 4269, SPRINGFIELD, MO 65808-4269
PO BOX 4270, SPRINGFIELD, MO 65808-4270
PO BOX 4271, SPRINGFIELD, MO 65808-4271
PO BOX 4272, SPRINGFIELD, MO 65808-4272
PO BOX 4273, SPRINGFIELD, MO 65808-4273
PO BOX 4274, SPRINGFIELD, MO 65808-4274
PO BOX 4275, SPRINGFIELD, MO 65808-4275
PO BOX 4276, SPRINGFIELD, MO 65808-4276
PO BOX 4277, SPRINGFIELD, MO 65808-4277
PO BOX 4278, SPRINGFIELD, MO 65808-4278
PO BOX 4279, SPRINGFIELD, MO 65808-4279
PO BOX 4280, SPRINGFIELD, MO 65808-4280
PO BOX 4281, SPRINGFIELD, MO 65808-4281
PO BOX 4282, SPRINGFIELD, MO 65808-4282
PO BOX 4283, SPRINGFIELD, MO 65808-4283
PO BOX 4284, SPRINGFIELD, MO 65808-4284
PO BOX 4285, SPRINGFIELD, MO 65808-4285
PO BOX 4286, SPRINGFIELD, MO 65808-4286
PO BOX 4287, SPRINGFIELD, MO 65808-4287
PO BOX 4288, SPRINGFIELD, MO 65808-4288
PO BOX 4289, SPRINGFIELD, MO 65808-4289
PO BOX 4290, SPRINGFIELD, MO 65808-4290
PO BOX 4291, SPRINGFIELD, MO 65808-4291
PO BOX 4292, SPRINGFIELD, MO 65808-4292
PO BOX 4293, SPRINGFIELD, MO 65808-4293
PO BOX 4294, SPRINGFIELD, MO 65808-4294
PO BOX 4295, SPRINGFIELD, MO 65808-4295
PO BOX 4296, SPRINGFIELD, MO 65808-4296
PO BOX 4297, SPRINGFIELD, MO 65808-4297
PO BOX 4298, SPRINGFIELD, MO 65808-4298
PO BOX 4299, SPRINGFIELD, MO 65808-4299
PO BOX 4300, SPRINGFIELD, MO 65808-4300
PO BOX 4301, SPRINGFIELD, MO 65808-4301
PO BOX 4302, SPRINGFIELD, MO 65808-4302
PO BOX 4303, SPRINGFIELD, MO 65808-4303
PO BOX 4304, SPRINGFIELD, MO 65808-4304
PO BOX 4305, SPRINGFIELD, MO 65808-4305
PO BOX 4306, SPRINGFIELD, MO 65808-4306
PO BOX 4307, SPRINGFIELD, MO 65808-4307
PO BOX 4308, SPRINGFIELD, MO 65808-4308
PO BOX 4309, SPRINGFIELD, MO 65808-4309
PO BOX 4310, SPRINGFIELD, MO 65808-4310
PO BOX 4311, SPRINGFIELD, MO 65808-4311
PO BOX 4312, SPRINGFIELD, MO 65808-4312
PO BOX 4313, SPRINGFIELD, MO 65808-4313
PO BOX 4314, SPRINGFIELD, MO 65808-4314
PO BOX 4315, SPRINGFIELD, MO 65808-4315
PO BOX 4316, SPRINGFIELD, MO 65808-4316
PO BOX 4317, SPRINGFIELD, MO 65808-4317
PO BOX 4318, SPRINGFIELD, MO 65808-4318
PO BOX 4319, SPRINGFIELD, MO 65808-4319
PO BOX 4320, SPRINGFIELD, MO 65808-4320
PO BOX 4321, SPRINGFIELD, MO 65808-4321
PO BOX 4322, SPRINGFIELD, MO 65808-4322
PO BOX 4323, SPRINGFIELD, MO 65808-4323
PO BOX 4324, SPRINGFIELD, MO 65808-4324
PO BOX 4325, SPRINGFIELD, MO 65808-4325
PO BOX 4326, SPRINGFIELD, MO 65808-4326
PO BOX 4327, SPRINGFIELD, MO 65808-4327
PO BOX 4328, SPRINGFIELD, MO 65808-4328
PO BOX 4329, SPRINGFIELD, MO 65808-4329
PO BOX 4330, SPRINGFIELD, MO 65808-4330
PO BOX 4331, SPRINGFIELD, MO 65808-4331
PO BOX 4332, SPRINGFIELD, MO 65808-4332
PO BOX 4333, SPRINGFIELD, MO 65808-4333
PO BOX 4334, SPRINGFIELD, MO 65808-4334
PO BOX 4335, SPRINGFIELD, MO 65808-4335
PO BOX 4336, SPRINGFIELD, MO 65808-4336
PO BOX 4337, SPRINGFIELD, MO 65808-4337
PO BOX 4338, SPRINGFIELD, MO 65808-4338
PO BOX 4339, SPRINGFIELD, MO 65808-4339
PO BOX 4340, SPRINGFIELD, MO 65808-4340
PO BOX 4341, SPRINGFIELD, MO 65808-4341
PO BOX 4342, SPRINGFIELD, MO 65808-4342
PO BOX 4343, SPRINGFIELD, MO 65808-4343
PO BOX 4344, SPRINGFIELD, MO 65808-4344
PO BOX 4345, SPRINGFIELD, MO 65808-4345
PO BOX 4346, SPRINGFIELD, MO 65808-4346
PO BOX 4347, SPRINGFIELD, MO 65808-4347
PO BOX 4348, SPRINGFIELD, MO 65808-4348
PO BOX 4349, SPRINGFIELD, MO 65808-4349
PO BOX 4350, SPRINGFIELD, MO 65808-4350
PO BOX 4351, SPRINGFIELD, MO 65808-4351
PO BOX 4352, SPRINGFIELD, MO 65808-4352
PO BOX 4353, SPRINGFIELD, MO 65808-4353
PO BOX 4354, SPRINGFIELD, MO 65808-4354
PO BOX 4355, SPRINGFIELD, MO 65808-4355
PO BOX 4356, SPRINGFIELD, MO 65808-4356
PO BOX 4357, SPRINGFIELD, MO 65808-4357
PO BOX 4358, SPRINGFIELD, MO 65808-4358
PO BOX 4359, SPRINGFIELD, MO 65808-4359
PO BOX 4360, SPRINGFIELD, MO 65808-4360
PO BOX 4361, SPRINGFIELD, MO 65808-4361
PO BOX 4362, SPRINGFIELD, MO 65808-4362
PO BOX 4363, SPRINGFIELD, MO 65808-4363
PO BOX 4364, SPRINGFIELD, MO 65808-4364
PO BOX 4365, SPRINGFIELD, MO 65808-4365
PO BOX 4366, SPRINGFIELD, MO 65808-4366
PO BOX 4367, SPRINGFIELD, MO 65808-4367
PO BOX 4368, SPRINGFIELD, MO 65808-4368
PO BOX 4369, SPRINGFIELD, MO 65808-4369
PO BOX 4370, SPRINGFIELD, MO 65808-4370
PO BOX 4371, SPRINGFIELD, MO 65808-4371
PO BOX 4372, SPRINGFIELD, MO 65808-4372
PO BOX 4373, SPRINGFIELD, MO 65808-4373
PO BOX 4374, SPRINGFIELD, MO 65808-4374
PO BOX 4375, SPRINGFIELD, MO 65808-4375
PO BOX 4376, SPRINGFIELD, MO 65808-4376
PO BOX 4377, SPRINGFIELD, MO 65808-4377
PO BOX 4378, SPRINGFIELD, MO 65808-4378
PO BOX 4379, SPRINGFIELD, MO 65808-4379
PO BOX 4380, SPRINGFIELD, MO 65808-4380
PO BOX 4381, SPRINGFIELD, MO 65808-4381
PO BOX 4382, SPRINGFIELD, MO 65808-4382
PO BOX 4383, SPRINGFIELD, MO 65808-4383
PO BOX 4384, SPRINGFIELD, MO 65808-4384
PO BOX 4385, SPRINGFIELD, MO 65808-4385
PO BOX 4386, SPRINGFIELD, MO 65808-4386
PO BOX 4387, SPRINGFIELD, MO 65808-4387
PO BOX 4388, SPRINGFIELD, MO 65808-4388
PO BOX 4389, SPRINGFIELD, MO 65808-4389
PO BOX 4390, SPRINGFIELD, MO 65808-4390
PO BOX 4391, SPRINGFIELD, MO 65808-4391
PO BOX 4392, SPRINGFIELD, MO 65808-4392
PO BOX 4393, SPRINGFIELD, MO 65808-4393
PO BOX 4394, SPRINGFIELD, MO 65808-4394
PO BOX 4395, SPRINGFIELD, MO 65808-4395
PO BOX 4396, SPRINGFIELD, MO 65808-4396
PO BOX 4397, SPRINGFIELD, MO 65808-4397
PO BOX 4398, SPRINGFIELD, MO 65808-4398
PO BOX 4399, SPRINGFIELD, MO 65808-4399
PO BOX 4400, SPRINGFIELD, MO 65808-4400
PO BOX 4401, SPRINGFIELD, MO 65808-4401
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