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 4501, SPRINGFIELD, MO 65808-4501
PO BOX 4502, SPRINGFIELD, MO 65808-4502
PO BOX 4503, SPRINGFIELD, MO 65808-4503
PO BOX 4504, SPRINGFIELD, MO 65808-4504
PO BOX 4505, SPRINGFIELD, MO 65808-4505
PO BOX 4506, SPRINGFIELD, MO 65808-4506
PO BOX 4507, SPRINGFIELD, MO 65808-4507
PO BOX 4508, SPRINGFIELD, MO 65808-4508
PO BOX 4509, SPRINGFIELD, MO 65808-4509
PO BOX 4510, SPRINGFIELD, MO 65808-4510
PO BOX 4511, SPRINGFIELD, MO 65808-4511
PO BOX 4512, SPRINGFIELD, MO 65808-4512
PO BOX 4513, SPRINGFIELD, MO 65808-4513
PO BOX 4514, SPRINGFIELD, MO 65808-4514
PO BOX 4515, SPRINGFIELD, MO 65808-4515
PO BOX 4516, SPRINGFIELD, MO 65808-4516
PO BOX 4517, SPRINGFIELD, MO 65808-4517
PO BOX 4518, SPRINGFIELD, MO 65808-4518
PO BOX 4519, SPRINGFIELD, MO 65808-4519
PO BOX 4520, SPRINGFIELD, MO 65808-4520
PO BOX 4521, SPRINGFIELD, MO 65808-4521
PO BOX 4522, SPRINGFIELD, MO 65808-4522
PO BOX 4523, SPRINGFIELD, MO 65808-4523
PO BOX 4524, SPRINGFIELD, MO 65808-4524
PO BOX 4525, SPRINGFIELD, MO 65808-4525
PO BOX 4526, SPRINGFIELD, MO 65808-4526
PO BOX 4527, SPRINGFIELD, MO 65808-4527
PO BOX 4528, SPRINGFIELD, MO 65808-4528
PO BOX 4529, SPRINGFIELD, MO 65808-4529
PO BOX 4530, SPRINGFIELD, MO 65808-4530
PO BOX 4531, SPRINGFIELD, MO 65808-4531
PO BOX 4532, SPRINGFIELD, MO 65808-4532
PO BOX 4533, SPRINGFIELD, MO 65808-4533
PO BOX 4534, SPRINGFIELD, MO 65808-4534
PO BOX 4535, SPRINGFIELD, MO 65808-4535
PO BOX 4536, SPRINGFIELD, MO 65808-4536
PO BOX 4537, SPRINGFIELD, MO 65808-4537
PO BOX 4538, SPRINGFIELD, MO 65808-4538
PO BOX 4539, SPRINGFIELD, MO 65808-4539
PO BOX 4540, SPRINGFIELD, MO 65808-4540
PO BOX 4541, SPRINGFIELD, MO 65808-4541
PO BOX 4542, SPRINGFIELD, MO 65808-4542
PO BOX 4543, SPRINGFIELD, MO 65808-4543
PO BOX 4544, SPRINGFIELD, MO 65808-4544
PO BOX 4545, SPRINGFIELD, MO 65808-4545
PO BOX 4546, SPRINGFIELD, MO 65808-4546
PO BOX 4547, SPRINGFIELD, MO 65808-4547
PO BOX 4548, SPRINGFIELD, MO 65808-4548
PO BOX 4549, SPRINGFIELD, MO 65808-4549
PO BOX 4550, SPRINGFIELD, MO 65808-4550
PO BOX 4551, SPRINGFIELD, MO 65808-4551
PO BOX 4552, SPRINGFIELD, MO 65808-4552
PO BOX 4553, SPRINGFIELD, MO 65808-4553
PO BOX 4554, SPRINGFIELD, MO 65808-4554
PO BOX 4555, SPRINGFIELD, MO 65808-4555
PO BOX 4556, SPRINGFIELD, MO 65808-4556
PO BOX 4557, SPRINGFIELD, MO 65808-4557
PO BOX 4558, SPRINGFIELD, MO 65808-4558
PO BOX 4559, SPRINGFIELD, MO 65808-4559
PO BOX 4560, SPRINGFIELD, MO 65808-4560
PO BOX 4561, SPRINGFIELD, MO 65808-4561
PO BOX 4562, SPRINGFIELD, MO 65808-4562
PO BOX 4563, SPRINGFIELD, MO 65808-4563
PO BOX 4564, SPRINGFIELD, MO 65808-4564
PO BOX 4565, SPRINGFIELD, MO 65808-4565
PO BOX 4566, SPRINGFIELD, MO 65808-4566
PO BOX 4567, SPRINGFIELD, MO 65808-4567
PO BOX 4568, SPRINGFIELD, MO 65808-4568
PO BOX 4569, SPRINGFIELD, MO 65808-4569
PO BOX 4570, SPRINGFIELD, MO 65808-4570
PO BOX 4571, SPRINGFIELD, MO 65808-4571
PO BOX 4572, SPRINGFIELD, MO 65808-4572
PO BOX 4573, SPRINGFIELD, MO 65808-4573
PO BOX 4574, SPRINGFIELD, MO 65808-4574
PO BOX 4575, SPRINGFIELD, MO 65808-4575
PO BOX 4576, SPRINGFIELD, MO 65808-4576
PO BOX 4577, SPRINGFIELD, MO 65808-4577
PO BOX 4578, SPRINGFIELD, MO 65808-4578
PO BOX 4579, SPRINGFIELD, MO 65808-4579
PO BOX 4580, SPRINGFIELD, MO 65808-4580
PO BOX 4581, SPRINGFIELD, MO 65808-4581
PO BOX 4582, SPRINGFIELD, MO 65808-4582
PO BOX 4583, SPRINGFIELD, MO 65808-4583
PO BOX 4584, SPRINGFIELD, MO 65808-4584
PO BOX 4585, SPRINGFIELD, MO 65808-4585
PO BOX 4586, SPRINGFIELD, MO 65808-4586
PO BOX 4587, SPRINGFIELD, MO 65808-4587
PO BOX 4588, SPRINGFIELD, MO 65808-4588
PO BOX 4589, SPRINGFIELD, MO 65808-4589
PO BOX 4590, SPRINGFIELD, MO 65808-4590
PO BOX 4591, SPRINGFIELD, MO 65808-4591
PO BOX 4592, SPRINGFIELD, MO 65808-4592
PO BOX 4593, SPRINGFIELD, MO 65808-4593
PO BOX 4594, SPRINGFIELD, MO 65808-4594
PO BOX 4595, SPRINGFIELD, MO 65808-4595
PO BOX 4596, SPRINGFIELD, MO 65808-4596
PO BOX 4597, SPRINGFIELD, MO 65808-4597
PO BOX 4598, SPRINGFIELD, MO 65808-4598
PO BOX 4599, SPRINGFIELD, MO 65808-4599
PO BOX 4600, SPRINGFIELD, MO 65808-4600
PO BOX 4601, SPRINGFIELD, MO 65808-4601
PO BOX 4602, SPRINGFIELD, MO 65808-4602
PO BOX 4603, SPRINGFIELD, MO 65808-4603
PO BOX 4604, SPRINGFIELD, MO 65808-4604
PO BOX 4605, SPRINGFIELD, MO 65808-4605
PO BOX 4606, SPRINGFIELD, MO 65808-4606
PO BOX 4607, SPRINGFIELD, MO 65808-4607
PO BOX 4608, SPRINGFIELD, MO 65808-4608
PO BOX 4609, SPRINGFIELD, MO 65808-4609
PO BOX 4610, SPRINGFIELD, MO 65808-4610
PO BOX 4611, SPRINGFIELD, MO 65808-4611
PO BOX 4612, SPRINGFIELD, MO 65808-4612
PO BOX 4613, SPRINGFIELD, MO 65808-4613
PO BOX 4614, SPRINGFIELD, MO 65808-4614
PO BOX 4615, SPRINGFIELD, MO 65808-4615
PO BOX 4616, SPRINGFIELD, MO 65808-4616
PO BOX 4617, SPRINGFIELD, MO 65808-4617
PO BOX 4618, SPRINGFIELD, MO 65808-4618
PO BOX 4619, SPRINGFIELD, MO 65808-4619
PO BOX 4620, SPRINGFIELD, MO 65808-4620
PO BOX 4621, SPRINGFIELD, MO 65808-4621
PO BOX 4622, SPRINGFIELD, MO 65808-4622
PO BOX 4623, SPRINGFIELD, MO 65808-4623
PO BOX 4624, SPRINGFIELD, MO 65808-4624
PO BOX 4625, SPRINGFIELD, MO 65808-4625
PO BOX 4626, SPRINGFIELD, MO 65808-4626
PO BOX 4627, SPRINGFIELD, MO 65808-4627
PO BOX 4628, SPRINGFIELD, MO 65808-4628
PO BOX 4629, SPRINGFIELD, MO 65808-4629
PO BOX 4630, SPRINGFIELD, MO 65808-4630
PO BOX 4631, SPRINGFIELD, MO 65808-4631
PO BOX 4632, SPRINGFIELD, MO 65808-4632
PO BOX 4633, SPRINGFIELD, MO 65808-4633
PO BOX 4634, SPRINGFIELD, MO 65808-4634
PO BOX 4635, SPRINGFIELD, MO 65808-4635
PO BOX 4636, SPRINGFIELD, MO 65808-4636
PO BOX 4637, SPRINGFIELD, MO 65808-4637
PO BOX 4638, SPRINGFIELD, MO 65808-4638
PO BOX 4639, SPRINGFIELD, MO 65808-4639
PO BOX 4640, SPRINGFIELD, MO 65808-4640
PO BOX 4641, SPRINGFIELD, MO 65808-4641
PO BOX 4642, SPRINGFIELD, MO 65808-4642
PO BOX 4643, SPRINGFIELD, MO 65808-4643
PO BOX 4644, SPRINGFIELD, MO 65808-4644
PO BOX 4645, SPRINGFIELD, MO 65808-4645
PO BOX 4646, SPRINGFIELD, MO 65808-4646
PO BOX 4647, SPRINGFIELD, MO 65808-4647
PO BOX 4648, SPRINGFIELD, MO 65808-4648
PO BOX 4649, SPRINGFIELD, MO 65808-4649
PO BOX 4650, SPRINGFIELD, MO 65808-4650
PO BOX 4651, SPRINGFIELD, MO 65808-4651
PO BOX 4652, SPRINGFIELD, MO 65808-4652
PO BOX 4653, SPRINGFIELD, MO 65808-4653
PO BOX 4654, SPRINGFIELD, MO 65808-4654
PO BOX 4655, SPRINGFIELD, MO 65808-4655
PO BOX 4656, SPRINGFIELD, MO 65808-4656
PO BOX 4657, SPRINGFIELD, MO 65808-4657
PO BOX 4658, SPRINGFIELD, MO 65808-4658
PO BOX 4659, SPRINGFIELD, MO 65808-4659
PO BOX 4660, SPRINGFIELD, MO 65808-4660
PO BOX 4661, SPRINGFIELD, MO 65808-4661
PO BOX 4662, SPRINGFIELD, MO 65808-4662
PO BOX 4663, SPRINGFIELD, MO 65808-4663
PO BOX 4664, SPRINGFIELD, MO 65808-4664
PO BOX 4665, SPRINGFIELD, MO 65808-4665
PO BOX 4666, SPRINGFIELD, MO 65808-4666
PO BOX 4667, SPRINGFIELD, MO 65808-4667
PO BOX 4668, SPRINGFIELD, MO 65808-4668
PO BOX 4669, SPRINGFIELD, MO 65808-4669
PO BOX 4670, SPRINGFIELD, MO 65808-4670
PO BOX 4671, SPRINGFIELD, MO 65808-4671
PO BOX 4672, SPRINGFIELD, MO 65808-4672
PO BOX 4673, SPRINGFIELD, MO 65808-4673
PO BOX 4674, SPRINGFIELD, MO 65808-4674
PO BOX 4675, SPRINGFIELD, MO 65808-4675
PO BOX 4676, SPRINGFIELD, MO 65808-4676
PO BOX 4677, SPRINGFIELD, MO 65808-4677
PO BOX 4678, SPRINGFIELD, MO 65808-4678
PO BOX 4679, SPRINGFIELD, MO 65808-4679
PO BOX 4680, SPRINGFIELD, MO 65808-4680
PO BOX 4681, SPRINGFIELD, MO 65808-4681
PO BOX 4682, SPRINGFIELD, MO 65808-4682
PO BOX 4683, SPRINGFIELD, MO 65808-4683
PO BOX 4684, SPRINGFIELD, MO 65808-4684
PO BOX 4685, SPRINGFIELD, MO 65808-4685
PO BOX 4686, SPRINGFIELD, MO 65808-4686
PO BOX 4687, SPRINGFIELD, MO 65808-4687
PO BOX 4688, SPRINGFIELD, MO 65808-4688
PO BOX 4689, SPRINGFIELD, MO 65808-4689
PO BOX 4690, SPRINGFIELD, MO 65808-4690
PO BOX 4691, SPRINGFIELD, MO 65808-4691
PO BOX 4692, SPRINGFIELD, MO 65808-4692
PO BOX 4693, SPRINGFIELD, MO 65808-4693
PO BOX 4694, SPRINGFIELD, MO 65808-4694
PO BOX 4695, SPRINGFIELD, MO 65808-4695
PO BOX 4696, SPRINGFIELD, MO 65808-4696
PO BOX 4697, SPRINGFIELD, MO 65808-4697
PO BOX 4698, SPRINGFIELD, MO 65808-4698
PO BOX 4699, SPRINGFIELD, MO 65808-4699
PO BOX 4700, SPRINGFIELD, MO 65808-4700
PO BOX 4701, SPRINGFIELD, MO 65808-4701
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