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 601, CASTLEFORD, ID 83321-0601
PO BOX 602, CASTLEFORD, ID 83321-0602
PO BOX 603, CASTLEFORD, ID 83321-0603
PO BOX 604, CASTLEFORD, ID 83321-0604
PO BOX 605, CASTLEFORD, ID 83321-0605
PO BOX 606, CASTLEFORD, ID 83321-0606
PO BOX 607, CASTLEFORD, ID 83321-0607
PO BOX 608, CASTLEFORD, ID 83321-0608
PO BOX 609, CASTLEFORD, ID 83321-0609
PO BOX 610, CASTLEFORD, ID 83321-0610
PO BOX 611, CASTLEFORD, ID 83321-0611
PO BOX 612, CASTLEFORD, ID 83321-0612
PO BOX 613, CASTLEFORD, ID 83321-0613
PO BOX 614, CASTLEFORD, ID 83321-0614
PO BOX 615, CASTLEFORD, ID 83321-0615
PO BOX 616, CASTLEFORD, ID 83321-0616
PO BOX 617, CASTLEFORD, ID 83321-0617
PO BOX 618, CASTLEFORD, ID 83321-0618
PO BOX 619, CASTLEFORD, ID 83321-0619
PO BOX 620, CASTLEFORD, ID 83321-0620
PO BOX 621, CASTLEFORD, ID 83321-0621
PO BOX 622, CASTLEFORD, ID 83321-0622
PO BOX 623, CASTLEFORD, ID 83321-0623
PO BOX 624, CASTLEFORD, ID 83321-0624
PO BOX 625, CASTLEFORD, ID 83321-0625
PO BOX 626, CASTLEFORD, ID 83321-0626
PO BOX 627, CASTLEFORD, ID 83321-0627
PO BOX 628, CASTLEFORD, ID 83321-0628
PO BOX 629, CASTLEFORD, ID 83321-0629
PO BOX 630, CASTLEFORD, ID 83321-0630
PO BOX 631, CASTLEFORD, ID 83321-0631
PO BOX 632, CASTLEFORD, ID 83321-0632
PO BOX 633, CASTLEFORD, ID 83321-0633
PO BOX 634, CASTLEFORD, ID 83321-0634
PO BOX 635, CASTLEFORD, ID 83321-0635
PO BOX 636, CASTLEFORD, ID 83321-0636
PO BOX 637, CASTLEFORD, ID 83321-0637
PO BOX 638, CASTLEFORD, ID 83321-0638
PO BOX 639, CASTLEFORD, ID 83321-0639
PO BOX 640, CASTLEFORD, ID 83321-0640
PO BOX 641, CASTLEFORD, ID 83321-0641
PO BOX 642, CASTLEFORD, ID 83321-0642
PO BOX 643, CASTLEFORD, ID 83321-0643
PO BOX 644, CASTLEFORD, ID 83321-0644
PO BOX 645, CASTLEFORD, ID 83321-0645
PO BOX 646, CASTLEFORD, ID 83321-0646
PO BOX 647, CASTLEFORD, ID 83321-0647
PO BOX 648, CASTLEFORD, ID 83321-0648
PO BOX 649, CASTLEFORD, ID 83321-0649
PO BOX 650, CASTLEFORD, ID 83321-0650
PO BOX 651, CASTLEFORD, ID 83321-0651
PO BOX 652, CASTLEFORD, ID 83321-0652
PO BOX 653, CASTLEFORD, ID 83321-0653
PO BOX 654, CASTLEFORD, ID 83321-0654
PO BOX 655, CASTLEFORD, ID 83321-0655
PO BOX 656, CASTLEFORD, ID 83321-0656
PO BOX 657, CASTLEFORD, ID 83321-0657
PO BOX 658, CASTLEFORD, ID 83321-0658
PO BOX 659, CASTLEFORD, ID 83321-0659
PO BOX 660, CASTLEFORD, ID 83321-0660
PO BOX 661, CASTLEFORD, ID 83321-0661
PO BOX 662, CASTLEFORD, ID 83321-0662
PO BOX 663, CASTLEFORD, ID 83321-0663
PO BOX 664, CASTLEFORD, ID 83321-0664
PO BOX 665, CASTLEFORD, ID 83321-0665
PO BOX 666, CASTLEFORD, ID 83321-0666
PO BOX 667, CASTLEFORD, ID 83321-0667
PO BOX 668, CASTLEFORD, ID 83321-0668
PO BOX 669, CASTLEFORD, ID 83321-0669
PO BOX 670, CASTLEFORD, ID 83321-0670
PO BOX 671, CASTLEFORD, ID 83321-0671
PO BOX 672, CASTLEFORD, ID 83321-0672
PO BOX 673, CASTLEFORD, ID 83321-0673
PO BOX 674, CASTLEFORD, ID 83321-0674
PO BOX 675, CASTLEFORD, ID 83321-0675
PO BOX 676, CASTLEFORD, ID 83321-0676
PO BOX 677, CASTLEFORD, ID 83321-0677
PO BOX 678, CASTLEFORD, ID 83321-0678
PO BOX 679, CASTLEFORD, ID 83321-0679
PO BOX 680, CASTLEFORD, ID 83321-0680
PO BOX 681, CASTLEFORD, ID 83321-0681
PO BOX 682, CASTLEFORD, ID 83321-0682
PO BOX 683, CASTLEFORD, ID 83321-0683
PO BOX 684, CASTLEFORD, ID 83321-0684
PO BOX 685, CASTLEFORD, ID 83321-0685
PO BOX 686, CASTLEFORD, ID 83321-0686
PO BOX 687, CASTLEFORD, ID 83321-0687
PO BOX 688, CASTLEFORD, ID 83321-0688
PO BOX 689, CASTLEFORD, ID 83321-0689
PO BOX 690, CASTLEFORD, ID 83321-0690
PO BOX 691, CASTLEFORD, ID 83321-0691
PO BOX 692, CASTLEFORD, ID 83321-0692
PO BOX 693, CASTLEFORD, ID 83321-0693
PO BOX 694, CASTLEFORD, ID 83321-0694
PO BOX 695, CASTLEFORD, ID 83321-0695
PO BOX 696, CASTLEFORD, ID 83321-0696
PO BOX 697, CASTLEFORD, ID 83321-0697
PO BOX 698, CASTLEFORD, ID 83321-0698
PO BOX 699, CASTLEFORD, ID 83321-0699
PO BOX 700, CASTLEFORD, ID 83321-0700
PO BOX 701, CASTLEFORD, ID 83321-0701
PO BOX 702, CASTLEFORD, ID 83321-0702
PO BOX 703, CASTLEFORD, ID 83321-0703
PO BOX 704, CASTLEFORD, ID 83321-0704
PO BOX 705, CASTLEFORD, ID 83321-0705
PO BOX 706, CASTLEFORD, ID 83321-0706
PO BOX 707, CASTLEFORD, ID 83321-0707
PO BOX 708, CASTLEFORD, ID 83321-0708
PO BOX 709, CASTLEFORD, ID 83321-0709
PO BOX 710, CASTLEFORD, ID 83321-0710
PO BOX 711, CASTLEFORD, ID 83321-0711
PO BOX 712, CASTLEFORD, ID 83321-0712
PO BOX 713, CASTLEFORD, ID 83321-0713
PO BOX 714, CASTLEFORD, ID 83321-0714
PO BOX 715, CASTLEFORD, ID 83321-0715
PO BOX 716, CASTLEFORD, ID 83321-0716
PO BOX 717, CASTLEFORD, ID 83321-0717
PO BOX 718, CASTLEFORD, ID 83321-0718
PO BOX 719, CASTLEFORD, ID 83321-0719
PO BOX 720, CASTLEFORD, ID 83321-0720
PO BOX 721, CASTLEFORD, ID 83321-0721
PO BOX 722, CASTLEFORD, ID 83321-0722
PO BOX 723, CASTLEFORD, ID 83321-0723
PO BOX 724, CASTLEFORD, ID 83321-0724
PO BOX 725, CASTLEFORD, ID 83321-0725
PO BOX 726, CASTLEFORD, ID 83321-0726
PO BOX 727, CASTLEFORD, ID 83321-0727
PO BOX 728, CASTLEFORD, ID 83321-0728
PO BOX 729, CASTLEFORD, ID 83321-0729
PO BOX 730, CASTLEFORD, ID 83321-0730
PO BOX 731, CASTLEFORD, ID 83321-0731
PO BOX 732, CASTLEFORD, ID 83321-0732
PO BOX 733, CASTLEFORD, ID 83321-0733
PO BOX 734, CASTLEFORD, ID 83321-0734
PO BOX 735, CASTLEFORD, ID 83321-0735
PO BOX 736, CASTLEFORD, ID 83321-0736
PO BOX 737, CASTLEFORD, ID 83321-0737
PO BOX 738, CASTLEFORD, ID 83321-0738
PO BOX 739, CASTLEFORD, ID 83321-0739
PO BOX 740, CASTLEFORD, ID 83321-0740
PO BOX 741, CASTLEFORD, ID 83321-0741
PO BOX 742, CASTLEFORD, ID 83321-0742
PO BOX 743, CASTLEFORD, ID 83321-0743
PO BOX 744, CASTLEFORD, ID 83321-0744
PO BOX 745, CASTLEFORD, ID 83321-0745
PO BOX 746, CASTLEFORD, ID 83321-0746
PO BOX 747, CASTLEFORD, ID 83321-0747
PO BOX 748, CASTLEFORD, ID 83321-0748
PO BOX 749, CASTLEFORD, ID 83321-0749
PO BOX 750, CASTLEFORD, ID 83321-0750
PO BOX 751, CASTLEFORD, ID 83321-0751
PO BOX 752, CASTLEFORD, ID 83321-0752
PO BOX 753, CASTLEFORD, ID 83321-0753
PO BOX 754, CASTLEFORD, ID 83321-0754
PO BOX 755, CASTLEFORD, ID 83321-0755
PO BOX 756, CASTLEFORD, ID 83321-0756
PO BOX 757, CASTLEFORD, ID 83321-0757
PO BOX 758, CASTLEFORD, ID 83321-0758
PO BOX 759, CASTLEFORD, ID 83321-0759
PO BOX 760, CASTLEFORD, ID 83321-0760
PO BOX 761, CASTLEFORD, ID 83321-0761
PO BOX 762, CASTLEFORD, ID 83321-0762
PO BOX 763, CASTLEFORD, ID 83321-0763
PO BOX 764, CASTLEFORD, ID 83321-0764
PO BOX 765, CASTLEFORD, ID 83321-0765
PO BOX 766, CASTLEFORD, ID 83321-0766
PO BOX 767, CASTLEFORD, ID 83321-0767
PO BOX 768, CASTLEFORD, ID 83321-0768
PO BOX 769, CASTLEFORD, ID 83321-0769
PO BOX 770, CASTLEFORD, ID 83321-0770
PO BOX 771, CASTLEFORD, ID 83321-0771
PO BOX 772, CASTLEFORD, ID 83321-0772
PO BOX 773, CASTLEFORD, ID 83321-0773
PO BOX 774, CASTLEFORD, ID 83321-0774
PO BOX 775, CASTLEFORD, ID 83321-0775
PO BOX 776, CASTLEFORD, ID 83321-0776
PO BOX 777, CASTLEFORD, ID 83321-0777
PO BOX 778, CASTLEFORD, ID 83321-0778
PO BOX 779, CASTLEFORD, ID 83321-0779
PO BOX 780, CASTLEFORD, ID 83321-0780
PO BOX 781, CASTLEFORD, ID 83321-0781
PO BOX 782, CASTLEFORD, ID 83321-0782
PO BOX 783, CASTLEFORD, ID 83321-0783
PO BOX 784, CASTLEFORD, ID 83321-0784
PO BOX 785, CASTLEFORD, ID 83321-0785
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