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 ALEXANDRIA, PA 15670-0641
PO BOX 642, NEW ALEXANDRIA, PA 15670-0642
PO BOX 643, NEW ALEXANDRIA, PA 15670-0643
PO BOX 644, NEW ALEXANDRIA, PA 15670-0644
PO BOX 645, NEW ALEXANDRIA, PA 15670-0645
PO BOX 646, NEW ALEXANDRIA, PA 15670-0646
PO BOX 647, NEW ALEXANDRIA, PA 15670-0647
PO BOX 648, NEW ALEXANDRIA, PA 15670-0648
PO BOX 649, NEW ALEXANDRIA, PA 15670-0649
PO BOX 650, NEW ALEXANDRIA, PA 15670-0650
PO BOX 651, NEW ALEXANDRIA, PA 15670-0651
PO BOX 652, NEW ALEXANDRIA, PA 15670-0652
PO BOX 653, NEW ALEXANDRIA, PA 15670-0653
PO BOX 654, NEW ALEXANDRIA, PA 15670-0654
PO BOX 655, NEW ALEXANDRIA, PA 15670-0655
PO BOX 656, NEW ALEXANDRIA, PA 15670-0656
PO BOX 657, NEW ALEXANDRIA, PA 15670-0657
PO BOX 658, NEW ALEXANDRIA, PA 15670-0658
PO BOX 659, NEW ALEXANDRIA, PA 15670-0659
PO BOX 660, NEW ALEXANDRIA, PA 15670-0660
PO BOX 661, NEW ALEXANDRIA, PA 15670-0661
PO BOX 662, NEW ALEXANDRIA, PA 15670-0662
PO BOX 663, NEW ALEXANDRIA, PA 15670-0663
PO BOX 664, NEW ALEXANDRIA, PA 15670-0664
PO BOX 665, NEW ALEXANDRIA, PA 15670-0665
PO BOX 666, NEW ALEXANDRIA, PA 15670-0666
PO BOX 667, NEW ALEXANDRIA, PA 15670-0667
PO BOX 668, NEW ALEXANDRIA, PA 15670-0668
PO BOX 669, NEW ALEXANDRIA, PA 15670-0669
PO BOX 670, NEW ALEXANDRIA, PA 15670-0670
PO BOX 671, NEW ALEXANDRIA, PA 15670-0671
PO BOX 672, NEW ALEXANDRIA, PA 15670-0672
PO BOX 673, NEW ALEXANDRIA, PA 15670-0673
PO BOX 674, NEW ALEXANDRIA, PA 15670-0674
PO BOX 675, NEW ALEXANDRIA, PA 15670-0675
PO BOX 676, NEW ALEXANDRIA, PA 15670-0676
PO BOX 677, NEW ALEXANDRIA, PA 15670-0677
PO BOX 678, NEW ALEXANDRIA, PA 15670-0678
PO BOX 679, NEW ALEXANDRIA, PA 15670-0679
PO BOX 680, NEW ALEXANDRIA, PA 15670-0680
PO BOX 681, NEW ALEXANDRIA, PA 15670-0681
PO BOX 682, NEW ALEXANDRIA, PA 15670-0682
PO BOX 683, NEW ALEXANDRIA, PA 15670-0683
PO BOX 684, NEW ALEXANDRIA, PA 15670-0684
PO BOX 685, NEW ALEXANDRIA, PA 15670-0685
PO BOX 686, NEW ALEXANDRIA, PA 15670-0686
PO BOX 687, NEW ALEXANDRIA, PA 15670-0687
PO BOX 688, NEW ALEXANDRIA, PA 15670-0688
PO BOX 689, NEW ALEXANDRIA, PA 15670-0689
PO BOX 690, NEW ALEXANDRIA, PA 15670-0690
PO BOX 691, NEW ALEXANDRIA, PA 15670-0691
PO BOX 692, NEW ALEXANDRIA, PA 15670-0692
PO BOX 693, NEW ALEXANDRIA, PA 15670-0693
PO BOX 694, NEW ALEXANDRIA, PA 15670-0694
PO BOX 695, NEW ALEXANDRIA, PA 15670-0695
PO BOX 696, NEW ALEXANDRIA, PA 15670-0696
PO BOX 697, NEW ALEXANDRIA, PA 15670-0697
PO BOX 698, NEW ALEXANDRIA, PA 15670-0698
PO BOX 699, NEW ALEXANDRIA, PA 15670-0699
PO BOX 700, NEW ALEXANDRIA, PA 15670-0700
PO BOX 701, NEW ALEXANDRIA, PA 15670-0701
PO BOX 702, NEW ALEXANDRIA, PA 15670-0702
PO BOX 703, NEW ALEXANDRIA, PA 15670-0703
PO BOX 704, NEW ALEXANDRIA, PA 15670-0704
PO BOX 705, NEW ALEXANDRIA, PA 15670-0705
PO BOX 706, NEW ALEXANDRIA, PA 15670-0706
PO BOX 707, NEW ALEXANDRIA, PA 15670-0707
PO BOX 708, NEW ALEXANDRIA, PA 15670-0708
PO BOX 709, NEW ALEXANDRIA, PA 15670-0709
PO BOX 710, NEW ALEXANDRIA, PA 15670-0710
PO BOX 711, NEW ALEXANDRIA, PA 15670-0711
PO BOX 712, NEW ALEXANDRIA, PA 15670-0712
PO BOX 713, NEW ALEXANDRIA, PA 15670-0713
PO BOX 714, NEW ALEXANDRIA, PA 15670-0714
PO BOX 715, NEW ALEXANDRIA, PA 15670-0715
PO BOX 716, NEW ALEXANDRIA, PA 15670-0716
PO BOX 717, NEW ALEXANDRIA, PA 15670-0717
PO BOX 718, NEW ALEXANDRIA, PA 15670-0718
PO BOX 719, NEW ALEXANDRIA, PA 15670-0719
PO BOX 720, NEW ALEXANDRIA, PA 15670-0720
PO BOX 721, NEW ALEXANDRIA, PA 15670-0721
PO BOX 722, NEW ALEXANDRIA, PA 15670-0722
PO BOX 723, NEW ALEXANDRIA, PA 15670-0723
PO BOX 724, NEW ALEXANDRIA, PA 15670-0724
PO BOX 725, NEW ALEXANDRIA, PA 15670-0725
PO BOX 726, NEW ALEXANDRIA, PA 15670-0726
PO BOX 727, NEW ALEXANDRIA, PA 15670-0727
PO BOX 728, NEW ALEXANDRIA, PA 15670-0728
PO BOX 729, NEW ALEXANDRIA, PA 15670-0729
PO BOX 730, NEW ALEXANDRIA, PA 15670-0730
PO BOX 731, NEW ALEXANDRIA, PA 15670-0731
PO BOX 732, NEW ALEXANDRIA, PA 15670-0732
PO BOX 733, NEW ALEXANDRIA, PA 15670-0733
PO BOX 734, NEW ALEXANDRIA, PA 15670-0734
PO BOX 735, NEW ALEXANDRIA, PA 15670-0735
PO BOX 736, NEW ALEXANDRIA, PA 15670-0736
PO BOX 737, NEW ALEXANDRIA, PA 15670-0737
PO BOX 738, NEW ALEXANDRIA, PA 15670-0738
PO BOX 739, NEW ALEXANDRIA, PA 15670-0739
PO BOX 740, NEW ALEXANDRIA, PA 15670-0740
PO BOX 741, NEW ALEXANDRIA, PA 15670-0741
PO BOX 742, NEW ALEXANDRIA, PA 15670-0742
PO BOX 743, NEW ALEXANDRIA, PA 15670-0743
PO BOX 744, NEW ALEXANDRIA, PA 15670-0744
PO BOX 745, NEW ALEXANDRIA, PA 15670-0745
PO BOX 746, NEW ALEXANDRIA, PA 15670-0746
PO BOX 747, NEW ALEXANDRIA, PA 15670-0747
PO BOX 748, NEW ALEXANDRIA, PA 15670-0748
PO BOX 749, NEW ALEXANDRIA, PA 15670-0749
PO BOX 750, NEW ALEXANDRIA, PA 15670-0750
PO BOX 751, NEW ALEXANDRIA, PA 15670-0751
PO BOX 752, NEW ALEXANDRIA, PA 15670-0752
PO BOX 753, NEW ALEXANDRIA, PA 15670-0753
PO BOX 754, NEW ALEXANDRIA, PA 15670-0754
PO BOX 755, NEW ALEXANDRIA, PA 15670-0755
PO BOX 756, NEW ALEXANDRIA, PA 15670-0756
PO BOX 757, NEW ALEXANDRIA, PA 15670-0757
PO BOX 758, NEW ALEXANDRIA, PA 15670-0758
PO BOX 759, NEW ALEXANDRIA, PA 15670-0759
PO BOX 760, NEW ALEXANDRIA, PA 15670-0760
PO BOX 761, NEW ALEXANDRIA, PA 15670-0761
PO BOX 762, NEW ALEXANDRIA, PA 15670-0762
PO BOX 763, NEW ALEXANDRIA, PA 15670-0763
PO BOX 764, NEW ALEXANDRIA, PA 15670-0764
PO BOX 765, NEW ALEXANDRIA, PA 15670-0765
PO BOX 766, NEW ALEXANDRIA, PA 15670-0766
PO BOX 767, NEW ALEXANDRIA, PA 15670-0767
PO BOX 768, NEW ALEXANDRIA, PA 15670-0768
PO BOX 769, NEW ALEXANDRIA, PA 15670-0769
PO BOX 770, NEW ALEXANDRIA, PA 15670-0770
PO BOX 771, NEW ALEXANDRIA, PA 15670-0771
PO BOX 772, NEW ALEXANDRIA, PA 15670-0772
PO BOX 773, NEW ALEXANDRIA, PA 15670-0773
PO BOX 774, NEW ALEXANDRIA, PA 15670-0774
PO BOX 775, NEW ALEXANDRIA, PA 15670-0775
PO BOX 776, NEW ALEXANDRIA, PA 15670-0776
PO BOX 777, NEW ALEXANDRIA, PA 15670-0777
PO BOX 778, NEW ALEXANDRIA, PA 15670-0778
PO BOX 779, NEW ALEXANDRIA, PA 15670-0779
PO BOX 780, NEW ALEXANDRIA, PA 15670-0780
PO BOX 781, NEW ALEXANDRIA, PA 15670-0781
PO BOX 782, NEW ALEXANDRIA, PA 15670-0782
PO BOX 783, NEW ALEXANDRIA, PA 15670-0783
PO BOX 784, NEW ALEXANDRIA, PA 15670-0784
PO BOX 785, NEW ALEXANDRIA, PA 15670-0785
PO BOX 786, NEW ALEXANDRIA, PA 15670-0786
PO BOX 787, NEW ALEXANDRIA, PA 15670-0787
PO BOX 788, NEW ALEXANDRIA, PA 15670-0788
PO BOX 789, NEW ALEXANDRIA, PA 15670-0789
PO BOX 790, NEW ALEXANDRIA, PA 15670-0790
PO BOX 791, NEW ALEXANDRIA, PA 15670-0791
PO BOX 792, NEW ALEXANDRIA, PA 15670-0792
PO BOX 793, NEW ALEXANDRIA, PA 15670-0793
PO BOX 794, NEW ALEXANDRIA, PA 15670-0794
PO BOX 795, NEW ALEXANDRIA, PA 15670-0795
PO BOX 796, NEW ALEXANDRIA, PA 15670-0796
PO BOX 797, NEW ALEXANDRIA, PA 15670-0797
PO BOX 798, NEW ALEXANDRIA, PA 15670-0798
PO BOX 799, NEW ALEXANDRIA, PA 15670-0799
PO BOX 800, NEW ALEXANDRIA, PA 15670-0800
PO BOX 801, NEW ALEXANDRIA, PA 15670-0801
PO BOX 802, NEW ALEXANDRIA, PA 15670-0802
PO BOX 803, NEW ALEXANDRIA, PA 15670-0803
PO BOX 804, NEW ALEXANDRIA, PA 15670-0804
PO BOX 805, NEW ALEXANDRIA, PA 15670-0805
PO BOX 806, NEW ALEXANDRIA, PA 15670-0806
PO BOX 807, NEW ALEXANDRIA, PA 15670-0807
PO BOX 808, NEW ALEXANDRIA, PA 15670-0808
PO BOX 809, NEW ALEXANDRIA, PA 15670-0809
PO BOX 810, NEW ALEXANDRIA, PA 15670-0810
PO BOX 811, NEW ALEXANDRIA, PA 15670-0811
PO BOX 812, NEW ALEXANDRIA, PA 15670-0812
PO BOX 813, NEW ALEXANDRIA, PA 15670-0813
PO BOX 814, NEW ALEXANDRIA, PA 15670-0814
PO BOX 815, NEW ALEXANDRIA, PA 15670-0815
PO BOX 816, NEW ALEXANDRIA, PA 15670-0816
PO BOX 817, NEW ALEXANDRIA, PA 15670-0817
PO BOX 818, NEW ALEXANDRIA, PA 15670-0818
PO BOX 819, NEW ALEXANDRIA, PA 15670-0819
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