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, PLAINFIELD, NJ 07061-0641
PO BOX 642, PLAINFIELD, NJ 07061-0642
PO BOX 643, PLAINFIELD, NJ 07061-0643
PO BOX 644, PLAINFIELD, NJ 07061-0644
PO BOX 645, PLAINFIELD, NJ 07061-0645
PO BOX 646, PLAINFIELD, NJ 07061-0646
PO BOX 647, PLAINFIELD, NJ 07061-0647
PO BOX 648, PLAINFIELD, NJ 07061-0648
PO BOX 649, PLAINFIELD, NJ 07061-0649
PO BOX 650, PLAINFIELD, NJ 07061-0650
PO BOX 651, PLAINFIELD, NJ 07061-0651
PO BOX 652, PLAINFIELD, NJ 07061-0652
PO BOX 653, PLAINFIELD, NJ 07061-0653
PO BOX 654, PLAINFIELD, NJ 07061-0654
PO BOX 655, PLAINFIELD, NJ 07061-0655
PO BOX 656, PLAINFIELD, NJ 07061-0656
PO BOX 657, PLAINFIELD, NJ 07061-0657
PO BOX 658, PLAINFIELD, NJ 07061-0658
PO BOX 659, PLAINFIELD, NJ 07061-0659
PO BOX 660, PLAINFIELD, NJ 07061-0660
PO BOX 661, PLAINFIELD, NJ 07061-0661
PO BOX 662, PLAINFIELD, NJ 07061-0662
PO BOX 663, PLAINFIELD, NJ 07061-0663
PO BOX 664, PLAINFIELD, NJ 07061-0664
PO BOX 665, PLAINFIELD, NJ 07061-0665
PO BOX 666, PLAINFIELD, NJ 07061-0666
PO BOX 667, PLAINFIELD, NJ 07061-0667
PO BOX 668, PLAINFIELD, NJ 07061-0668
PO BOX 669, PLAINFIELD, NJ 07061-0669
PO BOX 670, PLAINFIELD, NJ 07061-0670
PO BOX 671, PLAINFIELD, NJ 07061-0671
PO BOX 672, PLAINFIELD, NJ 07061-0672
PO BOX 673, PLAINFIELD, NJ 07061-0673
PO BOX 674, PLAINFIELD, NJ 07061-0674
PO BOX 675, PLAINFIELD, NJ 07061-0675
PO BOX 676, PLAINFIELD, NJ 07061-0676
PO BOX 677, PLAINFIELD, NJ 07061-0677
PO BOX 678, PLAINFIELD, NJ 07061-0678
PO BOX 679, PLAINFIELD, NJ 07061-0679
PO BOX 680, PLAINFIELD, NJ 07061-0680
PO BOX 681, PLAINFIELD, NJ 07061-0681
PO BOX 682, PLAINFIELD, NJ 07061-0682
PO BOX 683, PLAINFIELD, NJ 07061-0683
PO BOX 684, PLAINFIELD, NJ 07061-0684
PO BOX 685, PLAINFIELD, NJ 07061-0685
PO BOX 686, PLAINFIELD, NJ 07061-0686
PO BOX 687, PLAINFIELD, NJ 07061-0687
PO BOX 688, PLAINFIELD, NJ 07061-0688
PO BOX 689, PLAINFIELD, NJ 07061-0689
PO BOX 690, PLAINFIELD, NJ 07061-0690
PO BOX 691, PLAINFIELD, NJ 07061-0691
PO BOX 692, PLAINFIELD, NJ 07061-0692
PO BOX 693, PLAINFIELD, NJ 07061-0693
PO BOX 694, PLAINFIELD, NJ 07061-0694
PO BOX 695, PLAINFIELD, NJ 07061-0695
PO BOX 696, PLAINFIELD, NJ 07061-0696
PO BOX 697, PLAINFIELD, NJ 07061-0697
PO BOX 698, PLAINFIELD, NJ 07061-0698
PO BOX 699, PLAINFIELD, NJ 07061-0699
PO BOX 700, PLAINFIELD, NJ 07061-0700
PO BOX 701, PLAINFIELD, NJ 07061-0701
PO BOX 702, PLAINFIELD, NJ 07061-0702
PO BOX 703, PLAINFIELD, NJ 07061-0703
PO BOX 704, PLAINFIELD, NJ 07061-0704
PO BOX 705, PLAINFIELD, NJ 07061-0705
PO BOX 706, PLAINFIELD, NJ 07061-0706
PO BOX 707, PLAINFIELD, NJ 07061-0707
PO BOX 708, PLAINFIELD, NJ 07061-0708
PO BOX 709, PLAINFIELD, NJ 07061-0709
PO BOX 710, PLAINFIELD, NJ 07061-0710
PO BOX 711, PLAINFIELD, NJ 07061-0711
PO BOX 712, PLAINFIELD, NJ 07061-0712
PO BOX 713, PLAINFIELD, NJ 07061-0713
PO BOX 714, PLAINFIELD, NJ 07061-0714
PO BOX 715, PLAINFIELD, NJ 07061-0715
PO BOX 716, PLAINFIELD, NJ 07061-0716
PO BOX 717, PLAINFIELD, NJ 07061-0717
PO BOX 718, PLAINFIELD, NJ 07061-0718
PO BOX 719, PLAINFIELD, NJ 07061-0719
PO BOX 720, PLAINFIELD, NJ 07061-0720
PO BOX 721, PLAINFIELD, NJ 07061-0721
PO BOX 722, PLAINFIELD, NJ 07061-0722
PO BOX 723, PLAINFIELD, NJ 07061-0723
PO BOX 724, PLAINFIELD, NJ 07061-0724
PO BOX 725, PLAINFIELD, NJ 07061-0725
PO BOX 726, PLAINFIELD, NJ 07061-0726
PO BOX 727, PLAINFIELD, NJ 07061-0727
PO BOX 728, PLAINFIELD, NJ 07061-0728
PO BOX 729, PLAINFIELD, NJ 07061-0729
PO BOX 730, PLAINFIELD, NJ 07061-0730
PO BOX 731, PLAINFIELD, NJ 07061-0731
PO BOX 732, PLAINFIELD, NJ 07061-0732
PO BOX 733, PLAINFIELD, NJ 07061-0733
PO BOX 734, PLAINFIELD, NJ 07061-0734
PO BOX 735, PLAINFIELD, NJ 07061-0735
PO BOX 736, PLAINFIELD, NJ 07061-0736
PO BOX 737, PLAINFIELD, NJ 07061-0737
PO BOX 738, PLAINFIELD, NJ 07061-0738
PO BOX 739, PLAINFIELD, NJ 07061-0739
PO BOX 740, PLAINFIELD, NJ 07061-0740
PO BOX 741, PLAINFIELD, NJ 07061-0741
PO BOX 742, PLAINFIELD, NJ 07061-0742
PO BOX 743, PLAINFIELD, NJ 07061-0743
PO BOX 744, PLAINFIELD, NJ 07061-0744
PO BOX 745, PLAINFIELD, NJ 07061-0745
PO BOX 746, PLAINFIELD, NJ 07061-0746
PO BOX 747, PLAINFIELD, NJ 07061-0747
PO BOX 748, PLAINFIELD, NJ 07061-0748
PO BOX 749, PLAINFIELD, NJ 07061-0749
PO BOX 750, PLAINFIELD, NJ 07061-0750
PO BOX 751, PLAINFIELD, NJ 07061-0751
PO BOX 752, PLAINFIELD, NJ 07061-0752
PO BOX 753, PLAINFIELD, NJ 07061-0753
PO BOX 754, PLAINFIELD, NJ 07061-0754
PO BOX 755, PLAINFIELD, NJ 07061-0755
PO BOX 756, PLAINFIELD, NJ 07061-0756
PO BOX 757, PLAINFIELD, NJ 07061-0757
PO BOX 758, PLAINFIELD, NJ 07061-0758
PO BOX 759, PLAINFIELD, NJ 07061-0759
PO BOX 760, PLAINFIELD, NJ 07061-0760
PO BOX 761, PLAINFIELD, NJ 07061-0761
PO BOX 762, PLAINFIELD, NJ 07061-0762
PO BOX 763, PLAINFIELD, NJ 07061-0763
PO BOX 764, PLAINFIELD, NJ 07061-0764
PO BOX 765, PLAINFIELD, NJ 07061-0765
PO BOX 766, PLAINFIELD, NJ 07061-0766
PO BOX 767, PLAINFIELD, NJ 07061-0767
PO BOX 768, PLAINFIELD, NJ 07061-0768
PO BOX 769, PLAINFIELD, NJ 07061-0769
PO BOX 770, PLAINFIELD, NJ 07061-0770
PO BOX 771, PLAINFIELD, NJ 07061-0771
PO BOX 772, PLAINFIELD, NJ 07061-0772
PO BOX 773, PLAINFIELD, NJ 07061-0773
PO BOX 774, PLAINFIELD, NJ 07061-0774
PO BOX 775, PLAINFIELD, NJ 07061-0775
PO BOX 776, PLAINFIELD, NJ 07061-0776
PO BOX 777, PLAINFIELD, NJ 07061-0777
PO BOX 778, PLAINFIELD, NJ 07061-0778
PO BOX 779, PLAINFIELD, NJ 07061-0779
PO BOX 780, PLAINFIELD, NJ 07061-0780
PO BOX 781, PLAINFIELD, NJ 07061-0781
PO BOX 782, PLAINFIELD, NJ 07061-0782
PO BOX 783, PLAINFIELD, NJ 07061-0783
PO BOX 784, PLAINFIELD, NJ 07061-0784
PO BOX 785, PLAINFIELD, NJ 07061-0785
PO BOX 786, PLAINFIELD, NJ 07061-0786
PO BOX 787, PLAINFIELD, NJ 07061-0787
PO BOX 788, PLAINFIELD, NJ 07061-0788
PO BOX 789, PLAINFIELD, NJ 07061-0789
PO BOX 790, PLAINFIELD, NJ 07061-0790
PO BOX 791, PLAINFIELD, NJ 07061-0791
PO BOX 792, PLAINFIELD, NJ 07061-0792
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