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, SANTA PAULA, CA 93061-0641
PO BOX 642, SANTA PAULA, CA 93061-0642
PO BOX 643, SANTA PAULA, CA 93061-0643
PO BOX 644, SANTA PAULA, CA 93061-0644
PO BOX 645, SANTA PAULA, CA 93061-0645
PO BOX 646, SANTA PAULA, CA 93061-0646
PO BOX 647, SANTA PAULA, CA 93061-0647
PO BOX 648, SANTA PAULA, CA 93061-0648
PO BOX 649, SANTA PAULA, CA 93061-0649
PO BOX 650, SANTA PAULA, CA 93061-0650
PO BOX 651, SANTA PAULA, CA 93061-0651
PO BOX 652, SANTA PAULA, CA 93061-0652
PO BOX 653, SANTA PAULA, CA 93061-0653
PO BOX 654, SANTA PAULA, CA 93061-0654
PO BOX 655, SANTA PAULA, CA 93061-0655
PO BOX 656, SANTA PAULA, CA 93061-0656
PO BOX 657, SANTA PAULA, CA 93061-0657
PO BOX 658, SANTA PAULA, CA 93061-0658
PO BOX 659, SANTA PAULA, CA 93061-0659
PO BOX 660, SANTA PAULA, CA 93061-0660
PO BOX 661, SANTA PAULA, CA 93061-0661
PO BOX 662, SANTA PAULA, CA 93061-0662
PO BOX 663, SANTA PAULA, CA 93061-0663
PO BOX 664, SANTA PAULA, CA 93061-0664
PO BOX 665, SANTA PAULA, CA 93061-0665
PO BOX 666, SANTA PAULA, CA 93061-0666
PO BOX 667, SANTA PAULA, CA 93061-0667
PO BOX 668, SANTA PAULA, CA 93061-0668
PO BOX 669, SANTA PAULA, CA 93061-0669
PO BOX 670, SANTA PAULA, CA 93061-0670
PO BOX 671, SANTA PAULA, CA 93061-0671
PO BOX 672, SANTA PAULA, CA 93061-0672
PO BOX 673, SANTA PAULA, CA 93061-0673
PO BOX 674, SANTA PAULA, CA 93061-0674
PO BOX 675, SANTA PAULA, CA 93061-0675
PO BOX 676, SANTA PAULA, CA 93061-0676
PO BOX 677, SANTA PAULA, CA 93061-0677
PO BOX 678, SANTA PAULA, CA 93061-0678
PO BOX 679, SANTA PAULA, CA 93061-0679
PO BOX 680, SANTA PAULA, CA 93061-0680
PO BOX 681, SANTA PAULA, CA 93061-0681
PO BOX 682, SANTA PAULA, CA 93061-0682
PO BOX 683, SANTA PAULA, CA 93061-0683
PO BOX 684, SANTA PAULA, CA 93061-0684
PO BOX 685, SANTA PAULA, CA 93061-0685
PO BOX 686, SANTA PAULA, CA 93061-0686
PO BOX 687, SANTA PAULA, CA 93061-0687
PO BOX 688, SANTA PAULA, CA 93061-0688
PO BOX 689, SANTA PAULA, CA 93061-0689
PO BOX 690, SANTA PAULA, CA 93061-0690
PO BOX 691, SANTA PAULA, CA 93061-0691
PO BOX 692, SANTA PAULA, CA 93061-0692
PO BOX 693, SANTA PAULA, CA 93061-0693
PO BOX 694, SANTA PAULA, CA 93061-0694
PO BOX 695, SANTA PAULA, CA 93061-0695
PO BOX 696, SANTA PAULA, CA 93061-0696
PO BOX 697, SANTA PAULA, CA 93061-0697
PO BOX 698, SANTA PAULA, CA 93061-0698
PO BOX 699, SANTA PAULA, CA 93061-0699
PO BOX 700, SANTA PAULA, CA 93061-0700
PO BOX 701, SANTA PAULA, CA 93061-0701
PO BOX 702, SANTA PAULA, CA 93061-0702
PO BOX 703, SANTA PAULA, CA 93061-0703
PO BOX 704, SANTA PAULA, CA 93061-0704
PO BOX 705, SANTA PAULA, CA 93061-0705
PO BOX 706, SANTA PAULA, CA 93061-0706
PO BOX 707, SANTA PAULA, CA 93061-0707
PO BOX 708, SANTA PAULA, CA 93061-0708
PO BOX 709, SANTA PAULA, CA 93061-0709
PO BOX 710, SANTA PAULA, CA 93061-0710
PO BOX 711, SANTA PAULA, CA 93061-0711
PO BOX 712, SANTA PAULA, CA 93061-0712
PO BOX 713, SANTA PAULA, CA 93061-0713
PO BOX 714, SANTA PAULA, CA 93061-0714
PO BOX 715, SANTA PAULA, CA 93061-0715
PO BOX 716, SANTA PAULA, CA 93061-0716
PO BOX 717, SANTA PAULA, CA 93061-0717
PO BOX 718, SANTA PAULA, CA 93061-0718
PO BOX 719, SANTA PAULA, CA 93061-0719
PO BOX 720, SANTA PAULA, CA 93061-0720
PO BOX 721, SANTA PAULA, CA 93061-0721
PO BOX 722, SANTA PAULA, CA 93061-0722
PO BOX 723, SANTA PAULA, CA 93061-0723
PO BOX 724, SANTA PAULA, CA 93061-0724
PO BOX 725, SANTA PAULA, CA 93061-0725
PO BOX 726, SANTA PAULA, CA 93061-0726
PO BOX 727, SANTA PAULA, CA 93061-0727
PO BOX 728, SANTA PAULA, CA 93061-0728
PO BOX 729, SANTA PAULA, CA 93061-0729
PO BOX 730, SANTA PAULA, CA 93061-0730
PO BOX 731, SANTA PAULA, CA 93061-0731
PO BOX 732, SANTA PAULA, CA 93061-0732
PO BOX 733, SANTA PAULA, CA 93061-0733
PO BOX 734, SANTA PAULA, CA 93061-0734
PO BOX 735, SANTA PAULA, CA 93061-0735
PO BOX 736, SANTA PAULA, CA 93061-0736
PO BOX 737, SANTA PAULA, CA 93061-0737
PO BOX 738, SANTA PAULA, CA 93061-0738
PO BOX 739, SANTA PAULA, CA 93061-0739
PO BOX 740, SANTA PAULA, CA 93061-0740
PO BOX 741, SANTA PAULA, CA 93061-0741
PO BOX 742, SANTA PAULA, CA 93061-0742
PO BOX 743, SANTA PAULA, CA 93061-0743
PO BOX 744, SANTA PAULA, CA 93061-0744
PO BOX 745, SANTA PAULA, CA 93061-0745
PO BOX 746, SANTA PAULA, CA 93061-0746
PO BOX 747, SANTA PAULA, CA 93061-0747
PO BOX 748, SANTA PAULA, CA 93061-0748
PO BOX 749, SANTA PAULA, CA 93061-0749
PO BOX 750, SANTA PAULA, CA 93061-0750
PO BOX 751, SANTA PAULA, CA 93061-0751
PO BOX 752, SANTA PAULA, CA 93061-0752
PO BOX 753, SANTA PAULA, CA 93061-0753
PO BOX 754, SANTA PAULA, CA 93061-0754
PO BOX 755, SANTA PAULA, CA 93061-0755
PO BOX 756, SANTA PAULA, CA 93061-0756
PO BOX 757, SANTA PAULA, CA 93061-0757
PO BOX 758, SANTA PAULA, CA 93061-0758
PO BOX 759, SANTA PAULA, CA 93061-0759
PO BOX 760, SANTA PAULA, CA 93061-0760
PO BOX 761, SANTA PAULA, CA 93061-0761
PO BOX 762, SANTA PAULA, CA 93061-0762
PO BOX 763, SANTA PAULA, CA 93061-0763
PO BOX 764, SANTA PAULA, CA 93061-0764
PO BOX 765, SANTA PAULA, CA 93061-0765
PO BOX 766, SANTA PAULA, CA 93061-0766
PO BOX 767, SANTA PAULA, CA 93061-0767
PO BOX 768, SANTA PAULA, CA 93061-0768
PO BOX 769, SANTA PAULA, CA 93061-0769
PO BOX 770, SANTA PAULA, CA 93061-0770
PO BOX 771, SANTA PAULA, CA 93061-0771
PO BOX 772, SANTA PAULA, CA 93061-0772
PO BOX 773, SANTA PAULA, CA 93061-0773
PO BOX 774, SANTA PAULA, CA 93061-0774
PO BOX 775, SANTA PAULA, CA 93061-0775
PO BOX 776, SANTA PAULA, CA 93061-0776
PO BOX 777, SANTA PAULA, CA 93061-0777
PO BOX 778, SANTA PAULA, CA 93061-0778
PO BOX 779, SANTA PAULA, CA 93061-0779
PO BOX 780, SANTA PAULA, CA 93061-0780
PO BOX 781, SANTA PAULA, CA 93061-0781
PO BOX 782, SANTA PAULA, CA 93061-0782
PO BOX 783, SANTA PAULA, CA 93061-0783
PO BOX 784, SANTA PAULA, CA 93061-0784
PO BOX 785, SANTA PAULA, CA 93061-0785
PO BOX 786, SANTA PAULA, CA 93061-0786
PO BOX 787, SANTA PAULA, CA 93061-0787
PO BOX 788, SANTA PAULA, CA 93061-0788
PO BOX 789, SANTA PAULA, CA 93061-0789
PO BOX 790, SANTA PAULA, CA 93061-0790
PO BOX 791, SANTA PAULA, CA 93061-0791
PO BOX 792, SANTA PAULA, CA 93061-0792
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