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 631, HIGHLAND PARK, IL 60035-0631
PO BOX 632, HIGHLAND PARK, IL 60035-0632
PO BOX 633, HIGHLAND PARK, IL 60035-0633
PO BOX 634, HIGHLAND PARK, IL 60035-0634
PO BOX 635, HIGHLAND PARK, IL 60035-0635
PO BOX 636, HIGHLAND PARK, IL 60035-0636
PO BOX 637, HIGHLAND PARK, IL 60035-0637
PO BOX 638, HIGHLAND PARK, IL 60035-0638
PO BOX 639, HIGHLAND PARK, IL 60035-0639
PO BOX 640, HIGHLAND PARK, IL 60035-0640
PO BOX 641, HIGHLAND PARK, IL 60035-0641
PO BOX 642, HIGHLAND PARK, IL 60035-0642
PO BOX 643, HIGHLAND PARK, IL 60035-0643
PO BOX 644, HIGHLAND PARK, IL 60035-0644
PO BOX 645, HIGHLAND PARK, IL 60035-0645
PO BOX 646, HIGHLAND PARK, IL 60035-0646
PO BOX 647, HIGHLAND PARK, IL 60035-0647
PO BOX 648, HIGHLAND PARK, IL 60035-0648
PO BOX 649, HIGHLAND PARK, IL 60035-0649
PO BOX 650, HIGHLAND PARK, IL 60035-0650
PO BOX 651, HIGHLAND PARK, IL 60035-0651
PO BOX 652, HIGHLAND PARK, IL 60035-0652
PO BOX 653, HIGHLAND PARK, IL 60035-0653
PO BOX 654, HIGHLAND PARK, IL 60035-0654
PO BOX 655, HIGHLAND PARK, IL 60035-0655
PO BOX 656, HIGHLAND PARK, IL 60035-0656
PO BOX 657, HIGHLAND PARK, IL 60035-0657
PO BOX 658, HIGHLAND PARK, IL 60035-0658
PO BOX 659, HIGHLAND PARK, IL 60035-0659
PO BOX 660, HIGHLAND PARK, IL 60035-0660
PO BOX 661, HIGHLAND PARK, IL 60035-0661
PO BOX 662, HIGHLAND PARK, IL 60035-0662
PO BOX 663, HIGHLAND PARK, IL 60035-0663
PO BOX 664, HIGHLAND PARK, IL 60035-0664
PO BOX 665, HIGHLAND PARK, IL 60035-0665
PO BOX 666, HIGHLAND PARK, IL 60035-0666
PO BOX 667, HIGHLAND PARK, IL 60035-0667
PO BOX 668, HIGHLAND PARK, IL 60035-0668
PO BOX 669, HIGHLAND PARK, IL 60035-0669
PO BOX 670, HIGHLAND PARK, IL 60035-0670
PO BOX 671, HIGHLAND PARK, IL 60035-0671
PO BOX 672, HIGHLAND PARK, IL 60035-0672
PO BOX 673, HIGHLAND PARK, IL 60035-0673
PO BOX 674, HIGHLAND PARK, IL 60035-0674
PO BOX 675, HIGHLAND PARK, IL 60035-0675
PO BOX 676, HIGHLAND PARK, IL 60035-0676
PO BOX 677, HIGHLAND PARK, IL 60035-0677
PO BOX 678, HIGHLAND PARK, IL 60035-0678
PO BOX 679, HIGHLAND PARK, IL 60035-0679
PO BOX 680, HIGHLAND PARK, IL 60035-0680
PO BOX 681, HIGHLAND PARK, IL 60035-0681
PO BOX 682, HIGHLAND PARK, IL 60035-0682
PO BOX 683, HIGHLAND PARK, IL 60035-0683
PO BOX 684, HIGHLAND PARK, IL 60035-0684
PO BOX 685, HIGHLAND PARK, IL 60035-0685
PO BOX 686, HIGHLAND PARK, IL 60035-0686
PO BOX 687, HIGHLAND PARK, IL 60035-0687
PO BOX 688, HIGHLAND PARK, IL 60035-0688
PO BOX 689, HIGHLAND PARK, IL 60035-0689
PO BOX 690, HIGHLAND PARK, IL 60035-0690
PO BOX 691, HIGHLAND PARK, IL 60035-0691
PO BOX 692, HIGHLAND PARK, IL 60035-0692
PO BOX 693, HIGHLAND PARK, IL 60035-0693
PO BOX 694, HIGHLAND PARK, IL 60035-0694
PO BOX 695, HIGHLAND PARK, IL 60035-0695
PO BOX 696, HIGHLAND PARK, IL 60035-0696
PO BOX 697, HIGHLAND PARK, IL 60035-0697
PO BOX 698, HIGHLAND PARK, IL 60035-0698
PO BOX 699, HIGHLAND PARK, IL 60035-0699
PO BOX 700, HIGHLAND PARK, IL 60035-0700
PO BOX 701, HIGHLAND PARK, IL 60035-0701
PO BOX 702, HIGHLAND PARK, IL 60035-0702
PO BOX 703, HIGHLAND PARK, IL 60035-0703
PO BOX 704, HIGHLAND PARK, IL 60035-0704
PO BOX 705, HIGHLAND PARK, IL 60035-0705
PO BOX 706, HIGHLAND PARK, IL 60035-0706
PO BOX 707, HIGHLAND PARK, IL 60035-0707
PO BOX 708, HIGHLAND PARK, IL 60035-0708
PO BOX 709, HIGHLAND PARK, IL 60035-0709
PO BOX 710, HIGHLAND PARK, IL 60035-0710
PO BOX 711, HIGHLAND PARK, IL 60035-0711
PO BOX 712, HIGHLAND PARK, IL 60035-0712
PO BOX 713, HIGHLAND PARK, IL 60035-0713
PO BOX 714, HIGHLAND PARK, IL 60035-0714
PO BOX 715, HIGHLAND PARK, IL 60035-0715
PO BOX 716, HIGHLAND PARK, IL 60035-0716
PO BOX 717, HIGHLAND PARK, IL 60035-0717
PO BOX 718, HIGHLAND PARK, IL 60035-0718
PO BOX 719, HIGHLAND PARK, IL 60035-0719
PO BOX 720, HIGHLAND PARK, IL 60035-0720
PO BOX 721, HIGHLAND PARK, IL 60035-0721
PO BOX 722, HIGHLAND PARK, IL 60035-0722
PO BOX 723, HIGHLAND PARK, IL 60035-0723
PO BOX 724, HIGHLAND PARK, IL 60035-0724
PO BOX 725, HIGHLAND PARK, IL 60035-0725
PO BOX 726, HIGHLAND PARK, IL 60035-0726
PO BOX 727, HIGHLAND PARK, IL 60035-0727
PO BOX 728, HIGHLAND PARK, IL 60035-0728
PO BOX 729, HIGHLAND PARK, IL 60035-0729
PO BOX 730, HIGHLAND PARK, IL 60035-0730
PO BOX 731, HIGHLAND PARK, IL 60035-0731
PO BOX 732, HIGHLAND PARK, IL 60035-0732
PO BOX 733, HIGHLAND PARK, IL 60035-0733
PO BOX 734, HIGHLAND PARK, IL 60035-0734
PO BOX 735, HIGHLAND PARK, IL 60035-0735
PO BOX 736, HIGHLAND PARK, IL 60035-0736
PO BOX 737, HIGHLAND PARK, IL 60035-0737
PO BOX 738, HIGHLAND PARK, IL 60035-0738
PO BOX 739, HIGHLAND PARK, IL 60035-0739
PO BOX 740, HIGHLAND PARK, IL 60035-0740
PO BOX 741, HIGHLAND PARK, IL 60035-0741
PO BOX 742, HIGHLAND PARK, IL 60035-0742
PO BOX 743, HIGHLAND PARK, IL 60035-0743
PO BOX 744, HIGHLAND PARK, IL 60035-0744
PO BOX 745, HIGHLAND PARK, IL 60035-0745
PO BOX 746, HIGHLAND PARK, IL 60035-0746
PO BOX 747, HIGHLAND PARK, IL 60035-0747
PO BOX 748, HIGHLAND PARK, IL 60035-0748
PO BOX 749, HIGHLAND PARK, IL 60035-0749
PO BOX 750, HIGHLAND PARK, IL 60035-0750
PO BOX 751, HIGHLAND PARK, IL 60035-0751
PO BOX 752, HIGHLAND PARK, IL 60035-0752
PO BOX 753, HIGHLAND PARK, IL 60035-0753
PO BOX 754, HIGHLAND PARK, IL 60035-0754
PO BOX 755, HIGHLAND PARK, IL 60035-0755
PO BOX 756, HIGHLAND PARK, IL 60035-0756
PO BOX 757, HIGHLAND PARK, IL 60035-0757
PO BOX 758, HIGHLAND PARK, IL 60035-0758
PO BOX 759, HIGHLAND PARK, IL 60035-0759
PO BOX 760, HIGHLAND PARK, IL 60035-0760
PO BOX 761, HIGHLAND PARK, IL 60035-0761
PO BOX 762, HIGHLAND PARK, IL 60035-0762
PO BOX 763, HIGHLAND PARK, IL 60035-0763
PO BOX 764, HIGHLAND PARK, IL 60035-0764
PO BOX 765, HIGHLAND PARK, IL 60035-0765
PO BOX 766, HIGHLAND PARK, IL 60035-0766
PO BOX 767, HIGHLAND PARK, IL 60035-0767
PO BOX 768, HIGHLAND PARK, IL 60035-0768
PO BOX 769, HIGHLAND PARK, IL 60035-0769
PO BOX 770, HIGHLAND PARK, IL 60035-0770
PO BOX 771, HIGHLAND PARK, IL 60035-0771
PO BOX 772, HIGHLAND PARK, IL 60035-0772
PO BOX 773, HIGHLAND PARK, IL 60035-0773
PO BOX 774, HIGHLAND PARK, IL 60035-0774
PO BOX 775, HIGHLAND PARK, IL 60035-0775
PO BOX 776, HIGHLAND PARK, IL 60035-0776
PO BOX 777, HIGHLAND PARK, IL 60035-0777
PO BOX 778, HIGHLAND PARK, IL 60035-0778
PO BOX 779, HIGHLAND PARK, IL 60035-0779
PO BOX 780, HIGHLAND PARK, IL 60035-0780
PO BOX 781, HIGHLAND PARK, IL 60035-0781
PO BOX 782, HIGHLAND PARK, IL 60035-0782
PO BOX 783, HIGHLAND PARK, IL 60035-0783
PO BOX 784, HIGHLAND PARK, IL 60035-0784
PO BOX 785, HIGHLAND PARK, IL 60035-0785
PO BOX 786, HIGHLAND PARK, IL 60035-0786
PO BOX 787, HIGHLAND PARK, IL 60035-0787
PO BOX 788, HIGHLAND PARK, IL 60035-0788
PO BOX 789, HIGHLAND PARK, IL 60035-0789
PO BOX 790, HIGHLAND PARK, IL 60035-0790
PO BOX 791, HIGHLAND PARK, IL 60035-0791
PO BOX 792, HIGHLAND PARK, IL 60035-0792
PO BOX 793, HIGHLAND PARK, IL 60035-0793
PO BOX 794, HIGHLAND PARK, IL 60035-0794
Add new comment