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, PETERSBURG, VA 23804-0601
PO BOX 602, PETERSBURG, VA 23804-0602
PO BOX 603, PETERSBURG, VA 23804-0603
PO BOX 604, PETERSBURG, VA 23804-0604
PO BOX 605, PETERSBURG, VA 23804-0605
PO BOX 606, PETERSBURG, VA 23804-0606
PO BOX 607, PETERSBURG, VA 23804-0607
PO BOX 608, PETERSBURG, VA 23804-0608
PO BOX 609, PETERSBURG, VA 23804-0609
PO BOX 610, PETERSBURG, VA 23804-0610
PO BOX 611, PETERSBURG, VA 23804-0611
PO BOX 612, PETERSBURG, VA 23804-0612
PO BOX 613, PETERSBURG, VA 23804-0613
PO BOX 614, PETERSBURG, VA 23804-0614
PO BOX 615, PETERSBURG, VA 23804-0615
PO BOX 616, PETERSBURG, VA 23804-0616
PO BOX 617, PETERSBURG, VA 23804-0617
PO BOX 618, PETERSBURG, VA 23804-0618
PO BOX 619, PETERSBURG, VA 23804-0619
PO BOX 620, PETERSBURG, VA 23804-0620
PO BOX 621, PETERSBURG, VA 23804-0621
PO BOX 622, PETERSBURG, VA 23804-0622
PO BOX 623, PETERSBURG, VA 23804-0623
PO BOX 624, PETERSBURG, VA 23804-0624
PO BOX 625, PETERSBURG, VA 23804-0625
PO BOX 626, PETERSBURG, VA 23804-0626
PO BOX 627, PETERSBURG, VA 23804-0627
PO BOX 628, PETERSBURG, VA 23804-0628
PO BOX 629, PETERSBURG, VA 23804-0629
PO BOX 630, PETERSBURG, VA 23804-0630
PO BOX 631, PETERSBURG, VA 23804-0631
PO BOX 632, PETERSBURG, VA 23804-0632
PO BOX 633, PETERSBURG, VA 23804-0633
PO BOX 634, PETERSBURG, VA 23804-0634
PO BOX 635, PETERSBURG, VA 23804-0635
PO BOX 636, PETERSBURG, VA 23804-0636
PO BOX 637, PETERSBURG, VA 23804-0637
PO BOX 638, PETERSBURG, VA 23804-0638
PO BOX 639, PETERSBURG, VA 23804-0639
PO BOX 640, PETERSBURG, VA 23804-0640
PO BOX 641, PETERSBURG, VA 23804-0641
PO BOX 642, PETERSBURG, VA 23804-0642
PO BOX 643, PETERSBURG, VA 23804-0643
PO BOX 644, PETERSBURG, VA 23804-0644
PO BOX 645, PETERSBURG, VA 23804-0645
PO BOX 646, PETERSBURG, VA 23804-0646
PO BOX 647, PETERSBURG, VA 23804-0647
PO BOX 648, PETERSBURG, VA 23804-0648
PO BOX 649, PETERSBURG, VA 23804-0649
PO BOX 650, PETERSBURG, VA 23804-0650
PO BOX 651, PETERSBURG, VA 23804-0651
PO BOX 652, PETERSBURG, VA 23804-0652
PO BOX 653, PETERSBURG, VA 23804-0653
PO BOX 654, PETERSBURG, VA 23804-0654
PO BOX 655, PETERSBURG, VA 23804-0655
PO BOX 656, PETERSBURG, VA 23804-0656
PO BOX 657, PETERSBURG, VA 23804-0657
PO BOX 658, PETERSBURG, VA 23804-0658
PO BOX 659, PETERSBURG, VA 23804-0659
PO BOX 660, PETERSBURG, VA 23804-0660
PO BOX 661, PETERSBURG, VA 23804-0661
PO BOX 662, PETERSBURG, VA 23804-0662
PO BOX 663, PETERSBURG, VA 23804-0663
PO BOX 664, PETERSBURG, VA 23804-0664
PO BOX 665, PETERSBURG, VA 23804-0665
PO BOX 666, PETERSBURG, VA 23804-0666
PO BOX 667, PETERSBURG, VA 23804-0667
PO BOX 668, PETERSBURG, VA 23804-0668
PO BOX 669, PETERSBURG, VA 23804-0669
PO BOX 670, PETERSBURG, VA 23804-0670
PO BOX 671, PETERSBURG, VA 23804-0671
PO BOX 672, PETERSBURG, VA 23804-0672
PO BOX 673, PETERSBURG, VA 23804-0673
PO BOX 674, PETERSBURG, VA 23804-0674
PO BOX 675, PETERSBURG, VA 23804-0675
PO BOX 676, PETERSBURG, VA 23804-0676
PO BOX 677, PETERSBURG, VA 23804-0677
PO BOX 678, PETERSBURG, VA 23804-0678
PO BOX 679, PETERSBURG, VA 23804-0679
PO BOX 680, PETERSBURG, VA 23804-0680
PO BOX 681, PETERSBURG, VA 23804-0681
PO BOX 682, PETERSBURG, VA 23804-0682
PO BOX 683, PETERSBURG, VA 23804-0683
PO BOX 684, PETERSBURG, VA 23804-0684
PO BOX 685, PETERSBURG, VA 23804-0685
PO BOX 686, PETERSBURG, VA 23804-0686
PO BOX 687, PETERSBURG, VA 23804-0687
PO BOX 688, PETERSBURG, VA 23804-0688
PO BOX 689, PETERSBURG, VA 23804-0689
PO BOX 690, PETERSBURG, VA 23804-0690
PO BOX 691, PETERSBURG, VA 23804-0691
PO BOX 692, PETERSBURG, VA 23804-0692
PO BOX 693, PETERSBURG, VA 23804-0693
PO BOX 694, PETERSBURG, VA 23804-0694
PO BOX 695, PETERSBURG, VA 23804-0695
PO BOX 696, PETERSBURG, VA 23804-0696
PO BOX 697, PETERSBURG, VA 23804-0697
PO BOX 698, PETERSBURG, VA 23804-0698
PO BOX 699, PETERSBURG, VA 23804-0699
PO BOX 700, PETERSBURG, VA 23804-0700
PO BOX 701, PETERSBURG, VA 23804-0701
PO BOX 702, PETERSBURG, VA 23804-0702
PO BOX 703, PETERSBURG, VA 23804-0703
PO BOX 704, PETERSBURG, VA 23804-0704
PO BOX 705, PETERSBURG, VA 23804-0705
PO BOX 706, PETERSBURG, VA 23804-0706
PO BOX 707, PETERSBURG, VA 23804-0707
PO BOX 708, PETERSBURG, VA 23804-0708
PO BOX 709, PETERSBURG, VA 23804-0709
PO BOX 710, PETERSBURG, VA 23804-0710
PO BOX 711, PETERSBURG, VA 23804-0711
PO BOX 712, PETERSBURG, VA 23804-0712
PO BOX 713, PETERSBURG, VA 23804-0713
PO BOX 714, PETERSBURG, VA 23804-0714
PO BOX 715, PETERSBURG, VA 23804-0715
PO BOX 716, PETERSBURG, VA 23804-0716
PO BOX 717, PETERSBURG, VA 23804-0717
PO BOX 718, PETERSBURG, VA 23804-0718
PO BOX 719, PETERSBURG, VA 23804-0719
PO BOX 720, PETERSBURG, VA 23804-0720
PO BOX 721, PETERSBURG, VA 23804-0721
PO BOX 722, PETERSBURG, VA 23804-0722
PO BOX 723, PETERSBURG, VA 23804-0723
PO BOX 724, PETERSBURG, VA 23804-0724
PO BOX 725, PETERSBURG, VA 23804-0725
PO BOX 726, PETERSBURG, VA 23804-0726
PO BOX 727, PETERSBURG, VA 23804-0727
PO BOX 728, PETERSBURG, VA 23804-0728
PO BOX 729, PETERSBURG, VA 23804-0729
PO BOX 730, PETERSBURG, VA 23804-0730
PO BOX 731, PETERSBURG, VA 23804-0731
PO BOX 732, PETERSBURG, VA 23804-0732
PO BOX 733, PETERSBURG, VA 23804-0733
PO BOX 734, PETERSBURG, VA 23804-0734
PO BOX 735, PETERSBURG, VA 23804-0735
PO BOX 736, PETERSBURG, VA 23804-0736
PO BOX 737, PETERSBURG, VA 23804-0737
PO BOX 738, PETERSBURG, VA 23804-0738
PO BOX 739, PETERSBURG, VA 23804-0739
PO BOX 740, PETERSBURG, VA 23804-0740
PO BOX 741, PETERSBURG, VA 23804-0741
PO BOX 742, PETERSBURG, VA 23804-0742
PO BOX 743, PETERSBURG, VA 23804-0743
PO BOX 744, PETERSBURG, VA 23804-0744
PO BOX 745, PETERSBURG, VA 23804-0745
PO BOX 746, PETERSBURG, VA 23804-0746
PO BOX 747, PETERSBURG, VA 23804-0747
PO BOX 748, PETERSBURG, VA 23804-0748
PO BOX 749, PETERSBURG, VA 23804-0749
PO BOX 750, PETERSBURG, VA 23804-0750
PO BOX 751, PETERSBURG, VA 23804-0751
PO BOX 752, PETERSBURG, VA 23804-0752
PO BOX 753, PETERSBURG, VA 23804-0753
PO BOX 754, PETERSBURG, VA 23804-0754
PO BOX 755, PETERSBURG, VA 23804-0755
PO BOX 756, PETERSBURG, VA 23804-0756
PO BOX 757, PETERSBURG, VA 23804-0757
PO BOX 758, PETERSBURG, VA 23804-0758
PO BOX 759, PETERSBURG, VA 23804-0759
PO BOX 760, PETERSBURG, VA 23804-0760
PO BOX 761, PETERSBURG, VA 23804-0761
PO BOX 762, PETERSBURG, VA 23804-0762
PO BOX 763, PETERSBURG, VA 23804-0763
PO BOX 764, PETERSBURG, VA 23804-0764
PO BOX 765, PETERSBURG, VA 23804-0765
PO BOX 766, PETERSBURG, VA 23804-0766
PO BOX 767, PETERSBURG, VA 23804-0767
PO BOX 768, PETERSBURG, VA 23804-0768
PO BOX 769, PETERSBURG, VA 23804-0769
PO BOX 770, PETERSBURG, VA 23804-0770
PO BOX 771, PETERSBURG, VA 23804-0771
PO BOX 772, PETERSBURG, VA 23804-0772
PO BOX 773, PETERSBURG, VA 23804-0773
PO BOX 774, PETERSBURG, VA 23804-0774
PO BOX 775, PETERSBURG, VA 23804-0775
PO BOX 776, PETERSBURG, VA 23804-0776
PO BOX 777, PETERSBURG, VA 23804-0777
PO BOX 778, PETERSBURG, VA 23804-0778
PO BOX 779, PETERSBURG, VA 23804-0779
PO BOX 780, PETERSBURG, VA 23804-0780
PO BOX 781, PETERSBURG, VA 23804-0781
PO BOX 782, PETERSBURG, VA 23804-0782
PO BOX 783, PETERSBURG, VA 23804-0783
PO BOX 784, PETERSBURG, VA 23804-0784
PO BOX 785, PETERSBURG, VA 23804-0785
PO BOX 786, PETERSBURG, VA 23804-0786
PO BOX 787, PETERSBURG, VA 23804-0787
PO BOX 788, PETERSBURG, VA 23804-0788
PO BOX 789, PETERSBURG, VA 23804-0789
PO BOX 790, PETERSBURG, VA 23804-0790
PO BOX 791, PETERSBURG, VA 23804-0791
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