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 641, NEW ROCKFORD, ND 58356-0641
PO BOX 642, NEW ROCKFORD, ND 58356-0642
PO BOX 643, NEW ROCKFORD, ND 58356-0643
PO BOX 644, NEW ROCKFORD, ND 58356-0644
PO BOX 645, NEW ROCKFORD, ND 58356-0645
PO BOX 646, NEW ROCKFORD, ND 58356-0646
PO BOX 647, NEW ROCKFORD, ND 58356-0647
PO BOX 648, NEW ROCKFORD, ND 58356-0648
PO BOX 649, NEW ROCKFORD, ND 58356-0649
PO BOX 650, NEW ROCKFORD, ND 58356-0650
PO BOX 651, NEW ROCKFORD, ND 58356-0651
PO BOX 652, NEW ROCKFORD, ND 58356-0652
PO BOX 653, NEW ROCKFORD, ND 58356-0653
PO BOX 654, NEW ROCKFORD, ND 58356-0654
PO BOX 655, NEW ROCKFORD, ND 58356-0655
PO BOX 656, NEW ROCKFORD, ND 58356-0656
PO BOX 657, NEW ROCKFORD, ND 58356-0657
PO BOX 658, NEW ROCKFORD, ND 58356-0658
PO BOX 659, NEW ROCKFORD, ND 58356-0659
PO BOX 660, NEW ROCKFORD, ND 58356-0660
PO BOX 661, NEW ROCKFORD, ND 58356-0661
PO BOX 662, NEW ROCKFORD, ND 58356-0662
PO BOX 663, NEW ROCKFORD, ND 58356-0663
PO BOX 664, NEW ROCKFORD, ND 58356-0664
PO BOX 665, NEW ROCKFORD, ND 58356-0665
PO BOX 666, NEW ROCKFORD, ND 58356-0666
PO BOX 667, NEW ROCKFORD, ND 58356-0667
PO BOX 668, NEW ROCKFORD, ND 58356-0668
PO BOX 669, NEW ROCKFORD, ND 58356-0669
PO BOX 670, NEW ROCKFORD, ND 58356-0670
PO BOX 671, NEW ROCKFORD, ND 58356-0671
PO BOX 672, NEW ROCKFORD, ND 58356-0672
PO BOX 673, NEW ROCKFORD, ND 58356-0673
PO BOX 674, NEW ROCKFORD, ND 58356-0674
PO BOX 675, NEW ROCKFORD, ND 58356-0675
PO BOX 676, NEW ROCKFORD, ND 58356-0676
PO BOX 677, NEW ROCKFORD, ND 58356-0677
PO BOX 678, NEW ROCKFORD, ND 58356-0678
PO BOX 679, NEW ROCKFORD, ND 58356-0679
PO BOX 680, NEW ROCKFORD, ND 58356-0680
PO BOX 681, NEW ROCKFORD, ND 58356-0681
PO BOX 682, NEW ROCKFORD, ND 58356-0682
PO BOX 683, NEW ROCKFORD, ND 58356-0683
PO BOX 684, NEW ROCKFORD, ND 58356-0684
PO BOX 685, NEW ROCKFORD, ND 58356-0685
PO BOX 686, NEW ROCKFORD, ND 58356-0686
PO BOX 687, NEW ROCKFORD, ND 58356-0687
PO BOX 688, NEW ROCKFORD, ND 58356-0688
PO BOX 689, NEW ROCKFORD, ND 58356-0689
PO BOX 690, NEW ROCKFORD, ND 58356-0690
PO BOX 691, NEW ROCKFORD, ND 58356-0691
PO BOX 692, NEW ROCKFORD, ND 58356-0692
PO BOX 693, NEW ROCKFORD, ND 58356-0693
PO BOX 694, NEW ROCKFORD, ND 58356-0694
PO BOX 695, NEW ROCKFORD, ND 58356-0695
PO BOX 696, NEW ROCKFORD, ND 58356-0696
PO BOX 697, NEW ROCKFORD, ND 58356-0697
PO BOX 698, NEW ROCKFORD, ND 58356-0698
PO BOX 699, NEW ROCKFORD, ND 58356-0699
PO BOX 700, NEW ROCKFORD, ND 58356-0700
PO BOX 701, NEW ROCKFORD, ND 58356-0701
PO BOX 702, NEW ROCKFORD, ND 58356-0702
PO BOX 703, NEW ROCKFORD, ND 58356-0703
PO BOX 704, NEW ROCKFORD, ND 58356-0704
PO BOX 705, NEW ROCKFORD, ND 58356-0705
PO BOX 706, NEW ROCKFORD, ND 58356-0706
PO BOX 707, NEW ROCKFORD, ND 58356-0707
PO BOX 708, NEW ROCKFORD, ND 58356-0708
PO BOX 709, NEW ROCKFORD, ND 58356-0709
PO BOX 710, NEW ROCKFORD, ND 58356-0710
PO BOX 711, NEW ROCKFORD, ND 58356-0711
PO BOX 712, NEW ROCKFORD, ND 58356-0712
PO BOX 713, NEW ROCKFORD, ND 58356-0713
PO BOX 714, NEW ROCKFORD, ND 58356-0714
PO BOX 715, NEW ROCKFORD, ND 58356-0715
PO BOX 716, NEW ROCKFORD, ND 58356-0716
PO BOX 717, NEW ROCKFORD, ND 58356-0717
PO BOX 718, NEW ROCKFORD, ND 58356-0718
PO BOX 719, NEW ROCKFORD, ND 58356-0719
PO BOX 720, NEW ROCKFORD, ND 58356-0720
PO BOX 721, NEW ROCKFORD, ND 58356-0721
PO BOX 722, NEW ROCKFORD, ND 58356-0722
PO BOX 723, NEW ROCKFORD, ND 58356-0723
PO BOX 724, NEW ROCKFORD, ND 58356-0724
PO BOX 725, NEW ROCKFORD, ND 58356-0725
PO BOX 726, NEW ROCKFORD, ND 58356-0726
PO BOX 727, NEW ROCKFORD, ND 58356-0727
PO BOX 728, NEW ROCKFORD, ND 58356-0728
PO BOX 729, NEW ROCKFORD, ND 58356-0729
PO BOX 730, NEW ROCKFORD, ND 58356-0730
PO BOX 731, NEW ROCKFORD, ND 58356-0731
PO BOX 732, NEW ROCKFORD, ND 58356-0732
PO BOX 733, NEW ROCKFORD, ND 58356-0733
PO BOX 734, NEW ROCKFORD, ND 58356-0734
PO BOX 735, NEW ROCKFORD, ND 58356-0735
PO BOX 736, NEW ROCKFORD, ND 58356-0736
PO BOX 737, NEW ROCKFORD, ND 58356-0737
PO BOX 738, NEW ROCKFORD, ND 58356-0738
PO BOX 739, NEW ROCKFORD, ND 58356-0739
PO BOX 740, NEW ROCKFORD, ND 58356-0740
PO BOX 741, NEW ROCKFORD, ND 58356-0741
PO BOX 742, NEW ROCKFORD, ND 58356-0742
PO BOX 743, NEW ROCKFORD, ND 58356-0743
PO BOX 744, NEW ROCKFORD, ND 58356-0744
PO BOX 745, NEW ROCKFORD, ND 58356-0745
PO BOX 746, NEW ROCKFORD, ND 58356-0746
PO BOX 747, NEW ROCKFORD, ND 58356-0747
PO BOX 748, NEW ROCKFORD, ND 58356-0748
PO BOX 749, NEW ROCKFORD, ND 58356-0749
PO BOX 750, NEW ROCKFORD, ND 58356-0750
PO BOX 751, NEW ROCKFORD, ND 58356-0751
PO BOX 752, NEW ROCKFORD, ND 58356-0752
PO BOX 753, NEW ROCKFORD, ND 58356-0753
PO BOX 754, NEW ROCKFORD, ND 58356-0754
PO BOX 755, NEW ROCKFORD, ND 58356-0755
PO BOX 756, NEW ROCKFORD, ND 58356-0756
PO BOX 757, NEW ROCKFORD, ND 58356-0757
PO BOX 758, NEW ROCKFORD, ND 58356-0758
PO BOX 759, NEW ROCKFORD, ND 58356-0759
PO BOX 760, NEW ROCKFORD, ND 58356-0760
PO BOX 761, NEW ROCKFORD, ND 58356-0761
PO BOX 762, NEW ROCKFORD, ND 58356-0762
PO BOX 763, NEW ROCKFORD, ND 58356-0763
PO BOX 764, NEW ROCKFORD, ND 58356-0764
PO BOX 765, NEW ROCKFORD, ND 58356-0765
PO BOX 766, NEW ROCKFORD, ND 58356-0766
PO BOX 767, NEW ROCKFORD, ND 58356-0767
PO BOX 768, NEW ROCKFORD, ND 58356-0768
PO BOX 769, NEW ROCKFORD, ND 58356-0769
PO BOX 770, NEW ROCKFORD, ND 58356-0770
PO BOX 771, NEW ROCKFORD, ND 58356-0771
PO BOX 772, NEW ROCKFORD, ND 58356-0772
PO BOX 773, NEW ROCKFORD, ND 58356-0773
PO BOX 774, NEW ROCKFORD, ND 58356-0774
PO BOX 775, NEW ROCKFORD, ND 58356-0775
PO BOX 776, NEW ROCKFORD, ND 58356-0776
PO BOX 777, NEW ROCKFORD, ND 58356-0777
PO BOX 778, NEW ROCKFORD, ND 58356-0778
PO BOX 779, NEW ROCKFORD, ND 58356-0779
PO BOX 780, NEW ROCKFORD, ND 58356-0780
PO BOX 781, NEW ROCKFORD, ND 58356-0781
PO BOX 782, NEW ROCKFORD, ND 58356-0782
PO BOX 783, NEW ROCKFORD, ND 58356-0783
PO BOX 784, NEW ROCKFORD, ND 58356-0784
PO BOX 785, NEW ROCKFORD, ND 58356-0785
PO BOX 786, NEW ROCKFORD, ND 58356-0786
PO BOX 787, NEW ROCKFORD, ND 58356-0787
PO BOX 788, NEW ROCKFORD, ND 58356-0788
PO BOX 789, NEW ROCKFORD, ND 58356-0789
PO BOX 790, NEW ROCKFORD, ND 58356-0790
PO BOX 791, NEW ROCKFORD, ND 58356-0791
PO BOX 792, NEW ROCKFORD, ND 58356-0792
PO BOX 793, NEW ROCKFORD, ND 58356-0793
PO BOX 794, NEW ROCKFORD, ND 58356-0794
PO BOX 795, NEW ROCKFORD, ND 58356-0795
PO BOX 796, NEW ROCKFORD, ND 58356-0796
PO BOX 797, NEW ROCKFORD, ND 58356-0797
PO BOX 798, NEW ROCKFORD, ND 58356-0798
PO BOX 799, NEW ROCKFORD, ND 58356-0799
PO BOX 800, NEW ROCKFORD, ND 58356-0800
PO BOX 801, NEW ROCKFORD, ND 58356-0801
PO BOX 802, NEW ROCKFORD, ND 58356-0802
PO BOX 803, NEW ROCKFORD, ND 58356-0803
PO BOX 804, NEW ROCKFORD, ND 58356-0804
PO BOX 805, NEW ROCKFORD, ND 58356-0805
PO BOX 806, NEW ROCKFORD, ND 58356-0806
PO BOX 807, NEW ROCKFORD, ND 58356-0807
PO BOX 808, NEW ROCKFORD, ND 58356-0808
PO BOX 809, NEW ROCKFORD, ND 58356-0809
PO BOX 810, NEW ROCKFORD, ND 58356-0810
PO BOX 811, NEW ROCKFORD, ND 58356-0811
PO BOX 812, NEW ROCKFORD, ND 58356-0812
PO BOX 813, NEW ROCKFORD, ND 58356-0813
PO BOX 814, NEW ROCKFORD, ND 58356-0814
PO BOX 815, NEW ROCKFORD, ND 58356-0815
PO BOX 816, NEW ROCKFORD, ND 58356-0816
PO BOX 817, NEW ROCKFORD, ND 58356-0817
PO BOX 818, NEW ROCKFORD, ND 58356-0818
PO BOX 819, NEW ROCKFORD, ND 58356-0819
PO BOX 820, NEW ROCKFORD, ND 58356-0820
PO BOX 821, NEW ROCKFORD, ND 58356-0821
PO BOX 822, NEW ROCKFORD, ND 58356-0822
PO BOX 823, NEW ROCKFORD, ND 58356-0823
PO BOX 824, NEW ROCKFORD, ND 58356-0824
PO BOX 825, NEW ROCKFORD, ND 58356-0825
PO BOX 826, NEW ROCKFORD, ND 58356-0826
PO BOX 827, NEW ROCKFORD, ND 58356-0827
PO BOX 828, NEW ROCKFORD, ND 58356-0828
PO BOX 829, NEW ROCKFORD, ND 58356-0829
PO BOX 830, NEW ROCKFORD, ND 58356-0830
PO BOX 831, NEW ROCKFORD, ND 58356-0831
PO BOX 832, NEW ROCKFORD, ND 58356-0832
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