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 14551, SPRINGFIELD, MO 65814-0551
PO BOX 14552, SPRINGFIELD, MO 65814-0552
PO BOX 14553, SPRINGFIELD, MO 65814-0553
PO BOX 14554, SPRINGFIELD, MO 65814-0554
PO BOX 14555, SPRINGFIELD, MO 65814-0555
PO BOX 14556, SPRINGFIELD, MO 65814-0556
PO BOX 14557, SPRINGFIELD, MO 65814-0557
PO BOX 14558, SPRINGFIELD, MO 65814-0558
PO BOX 14559, SPRINGFIELD, MO 65814-0559
PO BOX 14560, SPRINGFIELD, MO 65814-0560
PO BOX 14561, SPRINGFIELD, MO 65814-0561
PO BOX 14562, SPRINGFIELD, MO 65814-0562
PO BOX 14563, SPRINGFIELD, MO 65814-0563
PO BOX 14564, SPRINGFIELD, MO 65814-0564
PO BOX 14565, SPRINGFIELD, MO 65814-0565
PO BOX 14566, SPRINGFIELD, MO 65814-0566
PO BOX 14567, SPRINGFIELD, MO 65814-0567
PO BOX 14568, SPRINGFIELD, MO 65814-0568
PO BOX 14569, SPRINGFIELD, MO 65814-0569
PO BOX 14570, SPRINGFIELD, MO 65814-0570
PO BOX 14571, SPRINGFIELD, MO 65814-0571
PO BOX 14572, SPRINGFIELD, MO 65814-0572
PO BOX 14573, SPRINGFIELD, MO 65814-0573
PO BOX 14574, SPRINGFIELD, MO 65814-0574
PO BOX 14575, SPRINGFIELD, MO 65814-0575
PO BOX 14576, SPRINGFIELD, MO 65814-0576
PO BOX 14577, SPRINGFIELD, MO 65814-0577
PO BOX 14578, SPRINGFIELD, MO 65814-0578
PO BOX 14579, SPRINGFIELD, MO 65814-0579
PO BOX 14580, SPRINGFIELD, MO 65814-0580
PO BOX 14581, SPRINGFIELD, MO 65814-0581
PO BOX 14582, SPRINGFIELD, MO 65814-0582
PO BOX 14583, SPRINGFIELD, MO 65814-0583
PO BOX 14584, SPRINGFIELD, MO 65814-0584
PO BOX 14585, SPRINGFIELD, MO 65814-0585
PO BOX 14586, SPRINGFIELD, MO 65814-0586
PO BOX 14587, SPRINGFIELD, MO 65814-0587
PO BOX 14588, SPRINGFIELD, MO 65814-0588
PO BOX 14589, SPRINGFIELD, MO 65814-0589
PO BOX 14590, SPRINGFIELD, MO 65814-0590
PO BOX 14591, SPRINGFIELD, MO 65814-0591
PO BOX 14592, SPRINGFIELD, MO 65814-0592
PO BOX 14593, SPRINGFIELD, MO 65814-0593
PO BOX 14594, SPRINGFIELD, MO 65814-0594
PO BOX 14595, SPRINGFIELD, MO 65814-0595
PO BOX 14596, SPRINGFIELD, MO 65814-0596
PO BOX 14597, SPRINGFIELD, MO 65814-0597
PO BOX 14598, SPRINGFIELD, MO 65814-0598
PO BOX 14599, SPRINGFIELD, MO 65814-0599
PO BOX 14600, SPRINGFIELD, MO 65814-0600
PO BOX 14601, SPRINGFIELD, MO 65814-0601
PO BOX 14602, SPRINGFIELD, MO 65814-0602
PO BOX 14603, SPRINGFIELD, MO 65814-0603
PO BOX 14604, SPRINGFIELD, MO 65814-0604
PO BOX 14605, SPRINGFIELD, MO 65814-0605
PO BOX 14606, SPRINGFIELD, MO 65814-0606
PO BOX 14607, SPRINGFIELD, MO 65814-0607
PO BOX 14608, SPRINGFIELD, MO 65814-0608
PO BOX 14609, SPRINGFIELD, MO 65814-0609
PO BOX 14610, SPRINGFIELD, MO 65814-0610
PO BOX 14611, SPRINGFIELD, MO 65814-0611
PO BOX 14612, SPRINGFIELD, MO 65814-0612
PO BOX 14613, SPRINGFIELD, MO 65814-0613
PO BOX 14614, SPRINGFIELD, MO 65814-0614
PO BOX 14615, SPRINGFIELD, MO 65814-0615
PO BOX 14616, SPRINGFIELD, MO 65814-0616
PO BOX 14617, SPRINGFIELD, MO 65814-0617
PO BOX 14618, SPRINGFIELD, MO 65814-0618
PO BOX 14619, SPRINGFIELD, MO 65814-0619
PO BOX 14620, SPRINGFIELD, MO 65814-0620
PO BOX 14621, SPRINGFIELD, MO 65814-0621
PO BOX 14622, SPRINGFIELD, MO 65814-0622
PO BOX 14623, SPRINGFIELD, MO 65814-0623
PO BOX 14624, SPRINGFIELD, MO 65814-0624
PO BOX 14625, SPRINGFIELD, MO 65814-0625
PO BOX 14626, SPRINGFIELD, MO 65814-0626
PO BOX 14627, SPRINGFIELD, MO 65814-0627
PO BOX 14628, SPRINGFIELD, MO 65814-0628
PO BOX 14629, SPRINGFIELD, MO 65814-0629
PO BOX 14630, SPRINGFIELD, MO 65814-0630
PO BOX 14631, SPRINGFIELD, MO 65814-0631
PO BOX 14632, SPRINGFIELD, MO 65814-0632
PO BOX 14633, SPRINGFIELD, MO 65814-0633
PO BOX 14634, SPRINGFIELD, MO 65814-0634
PO BOX 14635, SPRINGFIELD, MO 65814-0635
PO BOX 14636, SPRINGFIELD, MO 65814-0636
PO BOX 14637, SPRINGFIELD, MO 65814-0637
PO BOX 14638, SPRINGFIELD, MO 65814-0638
PO BOX 14639, SPRINGFIELD, MO 65814-0639
PO BOX 14640, SPRINGFIELD, MO 65814-0640
PO BOX 14641, SPRINGFIELD, MO 65814-0641
PO BOX 14642, SPRINGFIELD, MO 65814-0642
PO BOX 14643, SPRINGFIELD, MO 65814-0643
PO BOX 14644, SPRINGFIELD, MO 65814-0644
PO BOX 14645, SPRINGFIELD, MO 65814-0645
PO BOX 14646, SPRINGFIELD, MO 65814-0646
PO BOX 14647, SPRINGFIELD, MO 65814-0647
PO BOX 14648, SPRINGFIELD, MO 65814-0648
PO BOX 14649, SPRINGFIELD, MO 65814-0649
PO BOX 14650, SPRINGFIELD, MO 65814-0650
PO BOX 14651, SPRINGFIELD, MO 65814-0651
PO BOX 14652, SPRINGFIELD, MO 65814-0652
PO BOX 14653, SPRINGFIELD, MO 65814-0653
PO BOX 14654, SPRINGFIELD, MO 65814-0654
PO BOX 14655, SPRINGFIELD, MO 65814-0655
PO BOX 14656, SPRINGFIELD, MO 65814-0656
PO BOX 14657, SPRINGFIELD, MO 65814-0657
PO BOX 14658, SPRINGFIELD, MO 65814-0658
PO BOX 14659, SPRINGFIELD, MO 65814-0659
PO BOX 14660, SPRINGFIELD, MO 65814-0660
PO BOX 14661, SPRINGFIELD, MO 65814-0661
PO BOX 14662, SPRINGFIELD, MO 65814-0662
PO BOX 14663, SPRINGFIELD, MO 65814-0663
PO BOX 14664, SPRINGFIELD, MO 65814-0664
PO BOX 14665, SPRINGFIELD, MO 65814-0665
PO BOX 14666, SPRINGFIELD, MO 65814-0666
PO BOX 14667, SPRINGFIELD, MO 65814-0667
PO BOX 14668, SPRINGFIELD, MO 65814-0668
PO BOX 14669, SPRINGFIELD, MO 65814-0669
PO BOX 14670, SPRINGFIELD, MO 65814-0670
PO BOX 14671, SPRINGFIELD, MO 65814-0671
PO BOX 14672, SPRINGFIELD, MO 65814-0672
PO BOX 14673, SPRINGFIELD, MO 65814-0673
PO BOX 14674, SPRINGFIELD, MO 65814-0674
PO BOX 14675, SPRINGFIELD, MO 65814-0675
PO BOX 14676, SPRINGFIELD, MO 65814-0676
PO BOX 14677, SPRINGFIELD, MO 65814-0677
PO BOX 14678, SPRINGFIELD, MO 65814-0678
PO BOX 14679, SPRINGFIELD, MO 65814-0679
PO BOX 14680, SPRINGFIELD, MO 65814-0680
PO BOX 14681, SPRINGFIELD, MO 65814-0681
PO BOX 14682, SPRINGFIELD, MO 65814-0682
PO BOX 14683, SPRINGFIELD, MO 65814-0683
PO BOX 14684, SPRINGFIELD, MO 65814-0684
PO BOX 14685, SPRINGFIELD, MO 65814-0685
PO BOX 14686, SPRINGFIELD, MO 65814-0686
PO BOX 14687, SPRINGFIELD, MO 65814-0687
PO BOX 14688, SPRINGFIELD, MO 65814-0688
PO BOX 14689, SPRINGFIELD, MO 65814-0689
PO BOX 14690, SPRINGFIELD, MO 65814-0690
PO BOX 14691, SPRINGFIELD, MO 65814-0691
PO BOX 14692, SPRINGFIELD, MO 65814-0692
PO BOX 14693, SPRINGFIELD, MO 65814-0693
PO BOX 14694, SPRINGFIELD, MO 65814-0694
PO BOX 14695, SPRINGFIELD, MO 65814-0695
PO BOX 14696, SPRINGFIELD, MO 65814-0696
PO BOX 14697, SPRINGFIELD, MO 65814-0697
PO BOX 14698, SPRINGFIELD, MO 65814-0698
PO BOX 14699, SPRINGFIELD, MO 65814-0699
PO BOX 14700, SPRINGFIELD, MO 65814-0700
PO BOX 14701, SPRINGFIELD, MO 65814-0701
PO BOX 14702, SPRINGFIELD, MO 65814-0702
PO BOX 14703, SPRINGFIELD, MO 65814-0703
PO BOX 14704, SPRINGFIELD, MO 65814-0704
PO BOX 14705, SPRINGFIELD, MO 65814-0705
PO BOX 14706, SPRINGFIELD, MO 65814-0706
PO BOX 14707, SPRINGFIELD, MO 65814-0707
PO BOX 14708, SPRINGFIELD, MO 65814-0708
PO BOX 14709, SPRINGFIELD, MO 65814-0709
PO BOX 14710, SPRINGFIELD, MO 65814-0710
PO BOX 14711, SPRINGFIELD, MO 65814-0711
PO BOX 14712, SPRINGFIELD, MO 65814-0712
PO BOX 14713, SPRINGFIELD, MO 65814-0713
PO BOX 14714, SPRINGFIELD, MO 65814-0714
PO BOX 14715, SPRINGFIELD, MO 65814-0715
PO BOX 14716, SPRINGFIELD, MO 65814-0716
PO BOX 14717, SPRINGFIELD, MO 65814-0717
PO BOX 14718, SPRINGFIELD, MO 65814-0718
PO BOX 14719, SPRINGFIELD, MO 65814-0719
PO BOX 14720, SPRINGFIELD, MO 65814-0720
PO BOX 14721, SPRINGFIELD, MO 65814-0721
PO BOX 14722, SPRINGFIELD, MO 65814-0722
PO BOX 14723, SPRINGFIELD, MO 65814-0723
PO BOX 14724, SPRINGFIELD, MO 65814-0724
PO BOX 14725, SPRINGFIELD, MO 65814-0725
PO BOX 14726, SPRINGFIELD, MO 65814-0726
PO BOX 14727, SPRINGFIELD, MO 65814-0727
PO BOX 14728, SPRINGFIELD, MO 65814-0728
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