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 700, BLACKSBURG, VA 24063-0700
PO BOX 701, BLACKSBURG, VA 24063-0701
PO BOX 702, BLACKSBURG, VA 24063-0702
PO BOX 703, BLACKSBURG, VA 24063-0703
PO BOX 704, BLACKSBURG, VA 24063-0704
PO BOX 705, BLACKSBURG, VA 24063-0705
PO BOX 706, BLACKSBURG, VA 24063-0706
PO BOX 707, BLACKSBURG, VA 24063-0707
PO BOX 708, BLACKSBURG, VA 24063-0708
PO BOX 709, BLACKSBURG, VA 24063-0709
PO BOX 710, BLACKSBURG, VA 24063-0710
PO BOX 711, BLACKSBURG, VA 24063-0711
PO BOX 712, BLACKSBURG, VA 24063-0712
PO BOX 713, BLACKSBURG, VA 24063-0713
PO BOX 714, BLACKSBURG, VA 24063-0714
PO BOX 715, BLACKSBURG, VA 24063-0715
PO BOX 716, BLACKSBURG, VA 24063-0716
PO BOX 717, BLACKSBURG, VA 24063-0717
PO BOX 718, BLACKSBURG, VA 24063-0718
PO BOX 719, BLACKSBURG, VA 24063-0719
PO BOX 720, BLACKSBURG, VA 24063-0720
PO BOX 721, BLACKSBURG, VA 24063-0721
PO BOX 722, BLACKSBURG, VA 24063-0722
PO BOX 723, BLACKSBURG, VA 24063-0723
PO BOX 724, BLACKSBURG, VA 24063-0724
PO BOX 725, BLACKSBURG, VA 24063-0725
PO BOX 726, BLACKSBURG, VA 24063-0726
PO BOX 727, BLACKSBURG, VA 24063-0727
PO BOX 728, BLACKSBURG, VA 24063-0728
PO BOX 729, BLACKSBURG, VA 24063-0729
PO BOX 730, BLACKSBURG, VA 24063-0730
PO BOX 731, BLACKSBURG, VA 24063-0731
PO BOX 732, BLACKSBURG, VA 24063-0732
PO BOX 733, BLACKSBURG, VA 24063-0733
PO BOX 734, BLACKSBURG, VA 24063-0734
PO BOX 735, BLACKSBURG, VA 24063-0735
PO BOX 736, BLACKSBURG, VA 24063-0736
PO BOX 737, BLACKSBURG, VA 24063-0737
PO BOX 738, BLACKSBURG, VA 24063-0738
PO BOX 739, BLACKSBURG, VA 24063-0739
PO BOX 740, BLACKSBURG, VA 24063-0740
PO BOX 741, BLACKSBURG, VA 24063-0741
PO BOX 742, BLACKSBURG, VA 24063-0742
PO BOX 743, BLACKSBURG, VA 24063-0743
PO BOX 744, BLACKSBURG, VA 24063-0744
PO BOX 745, BLACKSBURG, VA 24063-0745
PO BOX 746, BLACKSBURG, VA 24063-0746
PO BOX 747, BLACKSBURG, VA 24063-0747
PO BOX 748, BLACKSBURG, VA 24063-0748
PO BOX 749, BLACKSBURG, VA 24063-0749
PO BOX 750, BLACKSBURG, VA 24063-0750
PO BOX 751, BLACKSBURG, VA 24063-0751
PO BOX 752, BLACKSBURG, VA 24063-0752
PO BOX 753, BLACKSBURG, VA 24063-0753
PO BOX 754, BLACKSBURG, VA 24063-0754
PO BOX 755, BLACKSBURG, VA 24063-0755
PO BOX 756, BLACKSBURG, VA 24063-0756
PO BOX 757, BLACKSBURG, VA 24063-0757
PO BOX 758, BLACKSBURG, VA 24063-0758
PO BOX 759, BLACKSBURG, VA 24063-0759
PO BOX 760, BLACKSBURG, VA 24063-0760
PO BOX 761, BLACKSBURG, VA 24063-0761
PO BOX 762, BLACKSBURG, VA 24063-0762
PO BOX 763, BLACKSBURG, VA 24063-0763
PO BOX 764, BLACKSBURG, VA 24063-0764
PO BOX 765, BLACKSBURG, VA 24063-0765
PO BOX 766, BLACKSBURG, VA 24063-0766
PO BOX 767, BLACKSBURG, VA 24063-0767
PO BOX 768, BLACKSBURG, VA 24063-0768
PO BOX 769, BLACKSBURG, VA 24063-0769
PO BOX 770, BLACKSBURG, VA 24063-0770
PO BOX 771, BLACKSBURG, VA 24063-0771
PO BOX 772, BLACKSBURG, VA 24063-0772
PO BOX 773, BLACKSBURG, VA 24063-0773
PO BOX 774, BLACKSBURG, VA 24063-0774
PO BOX 775, BLACKSBURG, VA 24063-0775
PO BOX 776, BLACKSBURG, VA 24063-0776
PO BOX 777, BLACKSBURG, VA 24063-0777
PO BOX 778, BLACKSBURG, VA 24063-0778
PO BOX 779, BLACKSBURG, VA 24063-0779
PO BOX 780, BLACKSBURG, VA 24063-0780
PO BOX 781, BLACKSBURG, VA 24063-0781
PO BOX 782, BLACKSBURG, VA 24063-0782
PO BOX 783, BLACKSBURG, VA 24063-0783
PO BOX 784, BLACKSBURG, VA 24063-0784
PO BOX 785, BLACKSBURG, VA 24063-0785
PO BOX 786, BLACKSBURG, VA 24063-0786
PO BOX 787, BLACKSBURG, VA 24063-0787
PO BOX 788, BLACKSBURG, VA 24063-0788
PO BOX 789, BLACKSBURG, VA 24063-0789
PO BOX 790, BLACKSBURG, VA 24063-0790
PO BOX 791, BLACKSBURG, VA 24063-0791
PO BOX 792, BLACKSBURG, VA 24063-0792
PO BOX 793, BLACKSBURG, VA 24063-0793
PO BOX 794, BLACKSBURG, VA 24063-0794
PO BOX 795, BLACKSBURG, VA 24063-0795
PO BOX 796, BLACKSBURG, VA 24063-0796
PO BOX 797, BLACKSBURG, VA 24063-0797
PO BOX 798, BLACKSBURG, VA 24063-0798
PO BOX 799, BLACKSBURG, VA 24063-0799
PO BOX 800, BLACKSBURG, VA 24063-0800
PO BOX 801, BLACKSBURG, VA 24063-0801
PO BOX 802, BLACKSBURG, VA 24063-0802
PO BOX 803, BLACKSBURG, VA 24063-0803
PO BOX 804, BLACKSBURG, VA 24063-0804
PO BOX 805, BLACKSBURG, VA 24063-0805
PO BOX 806, BLACKSBURG, VA 24063-0806
PO BOX 807, BLACKSBURG, VA 24063-0807
PO BOX 808, BLACKSBURG, VA 24063-0808
PO BOX 809, BLACKSBURG, VA 24063-0809
PO BOX 810, BLACKSBURG, VA 24063-0810
PO BOX 811, BLACKSBURG, VA 24063-0811
PO BOX 812, BLACKSBURG, VA 24063-0812
PO BOX 813, BLACKSBURG, VA 24063-0813
PO BOX 814, BLACKSBURG, VA 24063-0814
PO BOX 815, BLACKSBURG, VA 24063-0815
PO BOX 816, BLACKSBURG, VA 24063-0816
PO BOX 817, BLACKSBURG, VA 24063-0817
PO BOX 818, BLACKSBURG, VA 24063-0818
PO BOX 819, BLACKSBURG, VA 24063-0819
PO BOX 820, BLACKSBURG, VA 24063-0820
PO BOX 821, BLACKSBURG, VA 24063-0821
PO BOX 822, BLACKSBURG, VA 24063-0822
PO BOX 823, BLACKSBURG, VA 24063-0823
PO BOX 824, BLACKSBURG, VA 24063-0824
PO BOX 825, BLACKSBURG, VA 24063-0825
PO BOX 826, BLACKSBURG, VA 24063-0826
PO BOX 827, BLACKSBURG, VA 24063-0827
PO BOX 828, BLACKSBURG, VA 24063-0828
PO BOX 829, BLACKSBURG, VA 24063-0829
PO BOX 830, BLACKSBURG, VA 24063-0830
PO BOX 831, BLACKSBURG, VA 24063-0831
PO BOX 832, BLACKSBURG, VA 24063-0832
PO BOX 833, BLACKSBURG, VA 24063-0833
PO BOX 834, BLACKSBURG, VA 24063-0834
PO BOX 835, BLACKSBURG, VA 24063-0835
PO BOX 836, BLACKSBURG, VA 24063-0836
PO BOX 837, BLACKSBURG, VA 24063-0837
PO BOX 838, BLACKSBURG, VA 24063-0838
PO BOX 839, BLACKSBURG, VA 24063-0839
PO BOX 840, BLACKSBURG, VA 24063-0840
PO BOX 841, BLACKSBURG, VA 24063-0841
PO BOX 842, BLACKSBURG, VA 24063-0842
PO BOX 843, BLACKSBURG, VA 24063-0843
PO BOX 844, BLACKSBURG, VA 24063-0844
PO BOX 845, BLACKSBURG, VA 24063-0845
PO BOX 846, BLACKSBURG, VA 24063-0846
PO BOX 847, BLACKSBURG, VA 24063-0847
PO BOX 848, BLACKSBURG, VA 24063-0848
PO BOX 849, BLACKSBURG, VA 24063-0849
PO BOX 850, BLACKSBURG, VA 24063-0850
PO BOX 851, BLACKSBURG, VA 24063-0851
PO BOX 852, BLACKSBURG, VA 24063-0852
PO BOX 853, BLACKSBURG, VA 24063-0853
PO BOX 854, BLACKSBURG, VA 24063-0854
PO BOX 855, BLACKSBURG, VA 24063-0855
PO BOX 856, BLACKSBURG, VA 24063-0856
PO BOX 857, BLACKSBURG, VA 24063-0857
PO BOX 858, BLACKSBURG, VA 24063-0858
PO BOX 859, BLACKSBURG, VA 24063-0859
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