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 661, BORREGO SPRINGS, CA 92004-0661
PO BOX 662, BORREGO SPRINGS, CA 92004-0662
PO BOX 663, BORREGO SPRINGS, CA 92004-0663
PO BOX 664, BORREGO SPRINGS, CA 92004-0664
PO BOX 665, BORREGO SPRINGS, CA 92004-0665
PO BOX 666, BORREGO SPRINGS, CA 92004-0666
PO BOX 667, BORREGO SPRINGS, CA 92004-0667
PO BOX 668, BORREGO SPRINGS, CA 92004-0668
PO BOX 669, BORREGO SPRINGS, CA 92004-0669
PO BOX 670, BORREGO SPRINGS, CA 92004-0670
PO BOX 671, BORREGO SPRINGS, CA 92004-0671
PO BOX 672, BORREGO SPRINGS, CA 92004-0672
PO BOX 673, BORREGO SPRINGS, CA 92004-0673
PO BOX 674, BORREGO SPRINGS, CA 92004-0674
PO BOX 675, BORREGO SPRINGS, CA 92004-0675
PO BOX 676, BORREGO SPRINGS, CA 92004-0676
PO BOX 677, BORREGO SPRINGS, CA 92004-0677
PO BOX 678, BORREGO SPRINGS, CA 92004-0678
PO BOX 679, BORREGO SPRINGS, CA 92004-0679
PO BOX 680, BORREGO SPRINGS, CA 92004-0680
PO BOX 681, BORREGO SPRINGS, CA 92004-0681
PO BOX 682, BORREGO SPRINGS, CA 92004-0682
PO BOX 683, BORREGO SPRINGS, CA 92004-0683
PO BOX 684, BORREGO SPRINGS, CA 92004-0684
PO BOX 685, BORREGO SPRINGS, CA 92004-0685
PO BOX 686, BORREGO SPRINGS, CA 92004-0686
PO BOX 687, BORREGO SPRINGS, CA 92004-0687
PO BOX 688, BORREGO SPRINGS, CA 92004-0688
PO BOX 689, BORREGO SPRINGS, CA 92004-0689
PO BOX 690, BORREGO SPRINGS, CA 92004-0690
PO BOX 691, BORREGO SPRINGS, CA 92004-0691
PO BOX 692, BORREGO SPRINGS, CA 92004-0692
PO BOX 693, BORREGO SPRINGS, CA 92004-0693
PO BOX 694, BORREGO SPRINGS, CA 92004-0694
PO BOX 695, BORREGO SPRINGS, CA 92004-0695
PO BOX 696, BORREGO SPRINGS, CA 92004-0696
PO BOX 697, BORREGO SPRINGS, CA 92004-0697
PO BOX 698, BORREGO SPRINGS, CA 92004-0698
PO BOX 699, BORREGO SPRINGS, CA 92004-0699
PO BOX 700, BORREGO SPRINGS, CA 92004-0700
PO BOX 701, BORREGO SPRINGS, CA 92004-0701
PO BOX 702, BORREGO SPRINGS, CA 92004-0702
PO BOX 703, BORREGO SPRINGS, CA 92004-0703
PO BOX 704, BORREGO SPRINGS, CA 92004-0704
PO BOX 705, BORREGO SPRINGS, CA 92004-0705
PO BOX 706, BORREGO SPRINGS, CA 92004-0706
PO BOX 707, BORREGO SPRINGS, CA 92004-0707
PO BOX 708, BORREGO SPRINGS, CA 92004-0708
PO BOX 709, BORREGO SPRINGS, CA 92004-0709
PO BOX 710, BORREGO SPRINGS, CA 92004-0710
PO BOX 711, BORREGO SPRINGS, CA 92004-0711
PO BOX 712, BORREGO SPRINGS, CA 92004-0712
PO BOX 713, BORREGO SPRINGS, CA 92004-0713
PO BOX 714, BORREGO SPRINGS, CA 92004-0714
PO BOX 715, BORREGO SPRINGS, CA 92004-0715
PO BOX 716, BORREGO SPRINGS, CA 92004-0716
PO BOX 717, BORREGO SPRINGS, CA 92004-0717
PO BOX 718, BORREGO SPRINGS, CA 92004-0718
PO BOX 719, BORREGO SPRINGS, CA 92004-0719
PO BOX 720, BORREGO SPRINGS, CA 92004-0720
PO BOX 721, BORREGO SPRINGS, CA 92004-0721
PO BOX 722, BORREGO SPRINGS, CA 92004-0722
PO BOX 723, BORREGO SPRINGS, CA 92004-0723
PO BOX 724, BORREGO SPRINGS, CA 92004-0724
PO BOX 725, BORREGO SPRINGS, CA 92004-0725
PO BOX 726, BORREGO SPRINGS, CA 92004-0726
PO BOX 727, BORREGO SPRINGS, CA 92004-0727
PO BOX 728, BORREGO SPRINGS, CA 92004-0728
PO BOX 729, BORREGO SPRINGS, CA 92004-0729
PO BOX 730, BORREGO SPRINGS, CA 92004-0730
PO BOX 731, BORREGO SPRINGS, CA 92004-0731
PO BOX 732, BORREGO SPRINGS, CA 92004-0732
PO BOX 733, BORREGO SPRINGS, CA 92004-0733
PO BOX 734, BORREGO SPRINGS, CA 92004-0734
PO BOX 735, BORREGO SPRINGS, CA 92004-0735
PO BOX 736, BORREGO SPRINGS, CA 92004-0736
PO BOX 737, BORREGO SPRINGS, CA 92004-0737
PO BOX 738, BORREGO SPRINGS, CA 92004-0738
PO BOX 739, BORREGO SPRINGS, CA 92004-0739
PO BOX 740, BORREGO SPRINGS, CA 92004-0740
PO BOX 741, BORREGO SPRINGS, CA 92004-0741
PO BOX 742, BORREGO SPRINGS, CA 92004-0742
PO BOX 743, BORREGO SPRINGS, CA 92004-0743
PO BOX 744, BORREGO SPRINGS, CA 92004-0744
PO BOX 745, BORREGO SPRINGS, CA 92004-0745
PO BOX 746, BORREGO SPRINGS, CA 92004-0746
PO BOX 747, BORREGO SPRINGS, CA 92004-0747
PO BOX 748, BORREGO SPRINGS, CA 92004-0748
PO BOX 749, BORREGO SPRINGS, CA 92004-0749
PO BOX 750, BORREGO SPRINGS, CA 92004-0750
PO BOX 751, BORREGO SPRINGS, CA 92004-0751
PO BOX 752, BORREGO SPRINGS, CA 92004-0752
PO BOX 753, BORREGO SPRINGS, CA 92004-0753
PO BOX 754, BORREGO SPRINGS, CA 92004-0754
PO BOX 755, BORREGO SPRINGS, CA 92004-0755
PO BOX 756, BORREGO SPRINGS, CA 92004-0756
PO BOX 757, BORREGO SPRINGS, CA 92004-0757
PO BOX 758, BORREGO SPRINGS, CA 92004-0758
PO BOX 759, BORREGO SPRINGS, CA 92004-0759
PO BOX 760, BORREGO SPRINGS, CA 92004-0760
PO BOX 761, BORREGO SPRINGS, CA 92004-0761
PO BOX 762, BORREGO SPRINGS, CA 92004-0762
PO BOX 763, BORREGO SPRINGS, CA 92004-0763
PO BOX 764, BORREGO SPRINGS, CA 92004-0764
PO BOX 765, BORREGO SPRINGS, CA 92004-0765
PO BOX 766, BORREGO SPRINGS, CA 92004-0766
PO BOX 767, BORREGO SPRINGS, CA 92004-0767
PO BOX 768, BORREGO SPRINGS, CA 92004-0768
PO BOX 769, BORREGO SPRINGS, CA 92004-0769
PO BOX 770, BORREGO SPRINGS, CA 92004-0770
PO BOX 771, BORREGO SPRINGS, CA 92004-0771
PO BOX 772, BORREGO SPRINGS, CA 92004-0772
PO BOX 773, BORREGO SPRINGS, CA 92004-0773
PO BOX 774, BORREGO SPRINGS, CA 92004-0774
PO BOX 775, BORREGO SPRINGS, CA 92004-0775
PO BOX 776, BORREGO SPRINGS, CA 92004-0776
PO BOX 777, BORREGO SPRINGS, CA 92004-0777
PO BOX 778, BORREGO SPRINGS, CA 92004-0778
PO BOX 779, BORREGO SPRINGS, CA 92004-0779
PO BOX 780, BORREGO SPRINGS, CA 92004-0780
PO BOX 781, BORREGO SPRINGS, CA 92004-0781
PO BOX 782, BORREGO SPRINGS, CA 92004-0782
PO BOX 783, BORREGO SPRINGS, CA 92004-0783
PO BOX 784, BORREGO SPRINGS, CA 92004-0784
PO BOX 785, BORREGO SPRINGS, CA 92004-0785
PO BOX 786, BORREGO SPRINGS, CA 92004-0786
PO BOX 787, BORREGO SPRINGS, CA 92004-0787
PO BOX 788, BORREGO SPRINGS, CA 92004-0788
PO BOX 789, BORREGO SPRINGS, CA 92004-0789
PO BOX 790, BORREGO SPRINGS, CA 92004-0790
PO BOX 791, BORREGO SPRINGS, CA 92004-0791
PO BOX 792, BORREGO SPRINGS, CA 92004-0792
PO BOX 793, BORREGO SPRINGS, CA 92004-0793
PO BOX 794, BORREGO SPRINGS, CA 92004-0794
PO BOX 795, BORREGO SPRINGS, CA 92004-0795
PO BOX 796, BORREGO SPRINGS, CA 92004-0796
PO BOX 797, BORREGO SPRINGS, CA 92004-0797
PO BOX 798, BORREGO SPRINGS, CA 92004-0798
PO BOX 799, BORREGO SPRINGS, CA 92004-0799
PO BOX 800, BORREGO SPRINGS, CA 92004-0800
PO BOX 801, BORREGO SPRINGS, CA 92004-0801
PO BOX 802, BORREGO SPRINGS, CA 92004-0802
PO BOX 803, BORREGO SPRINGS, CA 92004-0803
PO BOX 804, BORREGO SPRINGS, CA 92004-0804
PO BOX 805, BORREGO SPRINGS, CA 92004-0805
PO BOX 806, BORREGO SPRINGS, CA 92004-0806
PO BOX 807, BORREGO SPRINGS, CA 92004-0807
PO BOX 808, BORREGO SPRINGS, CA 92004-0808
PO BOX 809, BORREGO SPRINGS, CA 92004-0809
PO BOX 810, BORREGO SPRINGS, CA 92004-0810
PO BOX 811, BORREGO SPRINGS, CA 92004-0811
PO BOX 812, BORREGO SPRINGS, CA 92004-0812
PO BOX 813, BORREGO SPRINGS, CA 92004-0813
PO BOX 814, BORREGO SPRINGS, CA 92004-0814
PO BOX 815, BORREGO SPRINGS, CA 92004-0815
PO BOX 816, BORREGO SPRINGS, CA 92004-0816
PO BOX 817, BORREGO SPRINGS, CA 92004-0817
PO BOX 818, BORREGO SPRINGS, CA 92004-0818
PO BOX 819, BORREGO SPRINGS, CA 92004-0819
PO BOX 820, BORREGO SPRINGS, CA 92004-0820
PO BOX 821, BORREGO SPRINGS, CA 92004-0821
PO BOX 822, BORREGO SPRINGS, CA 92004-0822
PO BOX 823, BORREGO SPRINGS, CA 92004-0823
PO BOX 824, BORREGO SPRINGS, CA 92004-0824
PO BOX 825, BORREGO SPRINGS, CA 92004-0825
PO BOX 826, BORREGO SPRINGS, CA 92004-0826
PO BOX 827, BORREGO SPRINGS, CA 92004-0827
PO BOX 828, BORREGO SPRINGS, CA 92004-0828
PO BOX 829, BORREGO SPRINGS, CA 92004-0829
PO BOX 830, BORREGO SPRINGS, CA 92004-0830
PO BOX 831, BORREGO SPRINGS, CA 92004-0831
PO BOX 832, BORREGO SPRINGS, CA 92004-0832
PO BOX 833, BORREGO SPRINGS, CA 92004-0833
PO BOX 834, BORREGO SPRINGS, CA 92004-0834
PO BOX 835, BORREGO SPRINGS, CA 92004-0835
PO BOX 836, BORREGO SPRINGS, CA 92004-0836
PO BOX 837, BORREGO SPRINGS, CA 92004-0837
PO BOX 838, BORREGO SPRINGS, CA 92004-0838
PO BOX 839, BORREGO SPRINGS, CA 92004-0839
PO BOX 840, BORREGO SPRINGS, CA 92004-0840
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