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 561, POUGHKEEPSIE, NY 12602-0561
PO BOX 562, POUGHKEEPSIE, NY 12602-0562
PO BOX 563, POUGHKEEPSIE, NY 12602-0563
PO BOX 564, POUGHKEEPSIE, NY 12602-0564
PO BOX 565, POUGHKEEPSIE, NY 12602-0565
PO BOX 566, POUGHKEEPSIE, NY 12602-0566
PO BOX 567, POUGHKEEPSIE, NY 12602-0567
PO BOX 568, POUGHKEEPSIE, NY 12602-0568
PO BOX 569, POUGHKEEPSIE, NY 12602-0569
PO BOX 570, POUGHKEEPSIE, NY 12602-0570
PO BOX 571, POUGHKEEPSIE, NY 12602-0571
PO BOX 572, POUGHKEEPSIE, NY 12602-0572
PO BOX 573, POUGHKEEPSIE, NY 12602-0573
PO BOX 574, POUGHKEEPSIE, NY 12602-0574
PO BOX 575, POUGHKEEPSIE, NY 12602-0575
PO BOX 576, POUGHKEEPSIE, NY 12602-0576
PO BOX 577, POUGHKEEPSIE, NY 12602-0577
PO BOX 578, POUGHKEEPSIE, NY 12602-0578
PO BOX 579, POUGHKEEPSIE, NY 12602-0579
PO BOX 580, POUGHKEEPSIE, NY 12602-0580
PO BOX 581, POUGHKEEPSIE, NY 12602-0581
PO BOX 582, POUGHKEEPSIE, NY 12602-0582
PO BOX 583, POUGHKEEPSIE, NY 12602-0583
PO BOX 584, POUGHKEEPSIE, NY 12602-0584
PO BOX 585, POUGHKEEPSIE, NY 12602-0585
PO BOX 586, POUGHKEEPSIE, NY 12602-0586
PO BOX 587, POUGHKEEPSIE, NY 12602-0587
PO BOX 588, POUGHKEEPSIE, NY 12602-0588
PO BOX 589, POUGHKEEPSIE, NY 12602-0589
PO BOX 590, POUGHKEEPSIE, NY 12602-0590
PO BOX 591, POUGHKEEPSIE, NY 12602-0591
PO BOX 592, POUGHKEEPSIE, NY 12602-0592
PO BOX 593, POUGHKEEPSIE, NY 12602-0593
PO BOX 594, POUGHKEEPSIE, NY 12602-0594
PO BOX 595, POUGHKEEPSIE, NY 12602-0595
PO BOX 596, POUGHKEEPSIE, NY 12602-0596
PO BOX 597, POUGHKEEPSIE, NY 12602-0597
PO BOX 598, POUGHKEEPSIE, NY 12602-0598
PO BOX 599, POUGHKEEPSIE, NY 12602-0599
PO BOX 600, POUGHKEEPSIE, NY 12602-0600
PO BOX 601, POUGHKEEPSIE, NY 12602-0601
PO BOX 602, POUGHKEEPSIE, NY 12602-0602
PO BOX 603, POUGHKEEPSIE, NY 12602-0603
PO BOX 604, POUGHKEEPSIE, NY 12602-0604
PO BOX 605, POUGHKEEPSIE, NY 12602-0605
PO BOX 606, POUGHKEEPSIE, NY 12602-0606
PO BOX 607, POUGHKEEPSIE, NY 12602-0607
PO BOX 608, POUGHKEEPSIE, NY 12602-0608
PO BOX 609, POUGHKEEPSIE, NY 12602-0609
PO BOX 610, POUGHKEEPSIE, NY 12602-0610
PO BOX 611, POUGHKEEPSIE, NY 12602-0611
PO BOX 612, POUGHKEEPSIE, NY 12602-0612
PO BOX 613, POUGHKEEPSIE, NY 12602-0613
PO BOX 614, POUGHKEEPSIE, NY 12602-0614
PO BOX 615, POUGHKEEPSIE, NY 12602-0615
PO BOX 616, POUGHKEEPSIE, NY 12602-0616
PO BOX 617, POUGHKEEPSIE, NY 12602-0617
PO BOX 618, POUGHKEEPSIE, NY 12602-0618
PO BOX 619, POUGHKEEPSIE, NY 12602-0619
PO BOX 620, POUGHKEEPSIE, NY 12602-0620
PO BOX 621, POUGHKEEPSIE, NY 12602-0621
PO BOX 622, POUGHKEEPSIE, NY 12602-0622
PO BOX 623, POUGHKEEPSIE, NY 12602-0623
PO BOX 624, POUGHKEEPSIE, NY 12602-0624
PO BOX 625, POUGHKEEPSIE, NY 12602-0625
PO BOX 626, POUGHKEEPSIE, NY 12602-0626
PO BOX 627, POUGHKEEPSIE, NY 12602-0627
PO BOX 628, POUGHKEEPSIE, NY 12602-0628
PO BOX 629, POUGHKEEPSIE, NY 12602-0629
PO BOX 630, POUGHKEEPSIE, NY 12602-0630
PO BOX 631, POUGHKEEPSIE, NY 12602-0631
PO BOX 632, POUGHKEEPSIE, NY 12602-0632
PO BOX 633, POUGHKEEPSIE, NY 12602-0633
PO BOX 634, POUGHKEEPSIE, NY 12602-0634
PO BOX 635, POUGHKEEPSIE, NY 12602-0635
PO BOX 636, POUGHKEEPSIE, NY 12602-0636
PO BOX 637, POUGHKEEPSIE, NY 12602-0637
PO BOX 638, POUGHKEEPSIE, NY 12602-0638
PO BOX 639, POUGHKEEPSIE, NY 12602-0639
PO BOX 640, POUGHKEEPSIE, NY 12602-0640
PO BOX 641, POUGHKEEPSIE, NY 12602-0641
PO BOX 642, POUGHKEEPSIE, NY 12602-0642
PO BOX 643, POUGHKEEPSIE, NY 12602-0643
PO BOX 644, POUGHKEEPSIE, NY 12602-0644
PO BOX 645, POUGHKEEPSIE, NY 12602-0645
PO BOX 646, POUGHKEEPSIE, NY 12602-0646
PO BOX 647, POUGHKEEPSIE, NY 12602-0647
PO BOX 648, POUGHKEEPSIE, NY 12602-0648
PO BOX 649, POUGHKEEPSIE, NY 12602-0649
PO BOX 650, POUGHKEEPSIE, NY 12602-0650
PO BOX 651, POUGHKEEPSIE, NY 12602-0651
PO BOX 652, POUGHKEEPSIE, NY 12602-0652
PO BOX 653, POUGHKEEPSIE, NY 12602-0653
PO BOX 654, POUGHKEEPSIE, NY 12602-0654
PO BOX 655, POUGHKEEPSIE, NY 12602-0655
PO BOX 656, POUGHKEEPSIE, NY 12602-0656
PO BOX 657, POUGHKEEPSIE, NY 12602-0657
PO BOX 658, POUGHKEEPSIE, NY 12602-0658
PO BOX 659, POUGHKEEPSIE, NY 12602-0659
PO BOX 660, POUGHKEEPSIE, NY 12602-0660
PO BOX 661, POUGHKEEPSIE, NY 12602-0661
PO BOX 662, POUGHKEEPSIE, NY 12602-0662
PO BOX 663, POUGHKEEPSIE, NY 12602-0663
PO BOX 664, POUGHKEEPSIE, NY 12602-0664
PO BOX 665, POUGHKEEPSIE, NY 12602-0665
PO BOX 666, POUGHKEEPSIE, NY 12602-0666
PO BOX 667, POUGHKEEPSIE, NY 12602-0667
PO BOX 668, POUGHKEEPSIE, NY 12602-0668
PO BOX 669, POUGHKEEPSIE, NY 12602-0669
PO BOX 670, POUGHKEEPSIE, NY 12602-0670
PO BOX 671, POUGHKEEPSIE, NY 12602-0671
PO BOX 672, POUGHKEEPSIE, NY 12602-0672
PO BOX 673, POUGHKEEPSIE, NY 12602-0673
PO BOX 674, POUGHKEEPSIE, NY 12602-0674
PO BOX 675, POUGHKEEPSIE, NY 12602-0675
PO BOX 676, POUGHKEEPSIE, NY 12602-0676
PO BOX 677, POUGHKEEPSIE, NY 12602-0677
PO BOX 678, POUGHKEEPSIE, NY 12602-0678
PO BOX 679, POUGHKEEPSIE, NY 12602-0679
PO BOX 680, POUGHKEEPSIE, NY 12602-0680
PO BOX 681, POUGHKEEPSIE, NY 12602-0681
PO BOX 682, POUGHKEEPSIE, NY 12602-0682
PO BOX 683, POUGHKEEPSIE, NY 12602-0683
PO BOX 684, POUGHKEEPSIE, NY 12602-0684
PO BOX 685, POUGHKEEPSIE, NY 12602-0685
PO BOX 686, POUGHKEEPSIE, NY 12602-0686
PO BOX 687, POUGHKEEPSIE, NY 12602-0687
PO BOX 688, POUGHKEEPSIE, NY 12602-0688
PO BOX 689, POUGHKEEPSIE, NY 12602-0689
PO BOX 690, POUGHKEEPSIE, NY 12602-0690
PO BOX 691, POUGHKEEPSIE, NY 12602-0691
PO BOX 692, POUGHKEEPSIE, NY 12602-0692
PO BOX 693, POUGHKEEPSIE, NY 12602-0693
PO BOX 694, POUGHKEEPSIE, NY 12602-0694
PO BOX 695, POUGHKEEPSIE, NY 12602-0695
PO BOX 696, POUGHKEEPSIE, NY 12602-0696
PO BOX 697, POUGHKEEPSIE, NY 12602-0697
PO BOX 698, POUGHKEEPSIE, NY 12602-0698
PO BOX 699, POUGHKEEPSIE, NY 12602-0699
PO BOX 700, POUGHKEEPSIE, NY 12602-0700
PO BOX 701, POUGHKEEPSIE, NY 12602-0701
PO BOX 702, POUGHKEEPSIE, NY 12602-0702
PO BOX 703, POUGHKEEPSIE, NY 12602-0703
PO BOX 704, POUGHKEEPSIE, NY 12602-0704
PO BOX 705, POUGHKEEPSIE, NY 12602-0705
PO BOX 706, POUGHKEEPSIE, NY 12602-0706
PO BOX 707, POUGHKEEPSIE, NY 12602-0707
PO BOX 708, POUGHKEEPSIE, NY 12602-0708
PO BOX 709, POUGHKEEPSIE, NY 12602-0709
PO BOX 710, POUGHKEEPSIE, NY 12602-0710
PO BOX 711, POUGHKEEPSIE, NY 12602-0711
PO BOX 712, POUGHKEEPSIE, NY 12602-0712
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