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 270641, SAN DIEGO, CA 92198-2641
PO BOX 270642, SAN DIEGO, CA 92198-2642
PO BOX 270643, SAN DIEGO, CA 92198-2643
PO BOX 270644, SAN DIEGO, CA 92198-2644
PO BOX 270645, SAN DIEGO, CA 92198-2645
PO BOX 270646, SAN DIEGO, CA 92198-2646
PO BOX 270647, SAN DIEGO, CA 92198-2647
PO BOX 270648, SAN DIEGO, CA 92198-2648
PO BOX 270649, SAN DIEGO, CA 92198-2649
PO BOX 270650, SAN DIEGO, CA 92198-2650
PO BOX 270651, SAN DIEGO, CA 92198-2651
PO BOX 270652, SAN DIEGO, CA 92198-2652
PO BOX 270653, SAN DIEGO, CA 92198-2653
PO BOX 270654, SAN DIEGO, CA 92198-2654
PO BOX 270655, SAN DIEGO, CA 92198-2655
PO BOX 270656, SAN DIEGO, CA 92198-2656
PO BOX 270657, SAN DIEGO, CA 92198-2657
PO BOX 270658, SAN DIEGO, CA 92198-2658
PO BOX 270659, SAN DIEGO, CA 92198-2659
PO BOX 270660, SAN DIEGO, CA 92198-2660
PO BOX 270661, SAN DIEGO, CA 92198-2661
PO BOX 270662, SAN DIEGO, CA 92198-2662
PO BOX 270663, SAN DIEGO, CA 92198-2663
PO BOX 270664, SAN DIEGO, CA 92198-2664
PO BOX 270665, SAN DIEGO, CA 92198-2665
PO BOX 270666, SAN DIEGO, CA 92198-2666
PO BOX 270667, SAN DIEGO, CA 92198-2667
PO BOX 270668, SAN DIEGO, CA 92198-2668
PO BOX 270669, SAN DIEGO, CA 92198-2669
PO BOX 270670, SAN DIEGO, CA 92198-2670
PO BOX 270671, SAN DIEGO, CA 92198-2671
PO BOX 270672, SAN DIEGO, CA 92198-2672
PO BOX 270673, SAN DIEGO, CA 92198-2673
PO BOX 270674, SAN DIEGO, CA 92198-2674
PO BOX 270675, SAN DIEGO, CA 92198-2675
PO BOX 270676, SAN DIEGO, CA 92198-2676
PO BOX 270677, SAN DIEGO, CA 92198-2677
PO BOX 270678, SAN DIEGO, CA 92198-2678
PO BOX 270679, SAN DIEGO, CA 92198-2679
PO BOX 270680, SAN DIEGO, CA 92198-2680
PO BOX 270681, SAN DIEGO, CA 92198-2681
PO BOX 270682, SAN DIEGO, CA 92198-2682
PO BOX 270683, SAN DIEGO, CA 92198-2683
PO BOX 270684, SAN DIEGO, CA 92198-2684
PO BOX 270685, SAN DIEGO, CA 92198-2685
PO BOX 270686, SAN DIEGO, CA 92198-2686
PO BOX 270687, SAN DIEGO, CA 92198-2687
PO BOX 270688, SAN DIEGO, CA 92198-2688
PO BOX 270689, SAN DIEGO, CA 92198-2689
PO BOX 270690, SAN DIEGO, CA 92198-2690
PO BOX 270691, SAN DIEGO, CA 92198-2691
PO BOX 270692, SAN DIEGO, CA 92198-2692
PO BOX 270693, SAN DIEGO, CA 92198-2693
PO BOX 270694, SAN DIEGO, CA 92198-2694
PO BOX 270695, SAN DIEGO, CA 92198-2695
PO BOX 270696, SAN DIEGO, CA 92198-2696
PO BOX 270697, SAN DIEGO, CA 92198-2697
PO BOX 270698, SAN DIEGO, CA 92198-2698
PO BOX 270699, SAN DIEGO, CA 92198-2699
PO BOX 270700, SAN DIEGO, CA 92198-2700
PO BOX 270701, SAN DIEGO, CA 92198-2701
PO BOX 270702, SAN DIEGO, CA 92198-2702
PO BOX 270703, SAN DIEGO, CA 92198-2703
PO BOX 270704, SAN DIEGO, CA 92198-2704
PO BOX 270705, SAN DIEGO, CA 92198-2705
PO BOX 270706, SAN DIEGO, CA 92198-2706
PO BOX 270707, SAN DIEGO, CA 92198-2707
PO BOX 270708, SAN DIEGO, CA 92198-2708
PO BOX 270709, SAN DIEGO, CA 92198-2709
PO BOX 270710, SAN DIEGO, CA 92198-2710
PO BOX 270711, SAN DIEGO, CA 92198-2711
PO BOX 270712, SAN DIEGO, CA 92198-2712
PO BOX 270713, SAN DIEGO, CA 92198-2713
PO BOX 270714, SAN DIEGO, CA 92198-2714
PO BOX 270715, SAN DIEGO, CA 92198-2715
PO BOX 270716, SAN DIEGO, CA 92198-2716
PO BOX 270717, SAN DIEGO, CA 92198-2717
PO BOX 270718, SAN DIEGO, CA 92198-2718
PO BOX 270719, SAN DIEGO, CA 92198-2719
PO BOX 270720, SAN DIEGO, CA 92198-2720
PO BOX 270721, SAN DIEGO, CA 92198-2721
PO BOX 270722, SAN DIEGO, CA 92198-2722
PO BOX 270723, SAN DIEGO, CA 92198-2723
PO BOX 270724, SAN DIEGO, CA 92198-2724
PO BOX 270725, SAN DIEGO, CA 92198-2725
PO BOX 270726, SAN DIEGO, CA 92198-2726
PO BOX 270727, SAN DIEGO, CA 92198-2727
PO BOX 270728, SAN DIEGO, CA 92198-2728
PO BOX 270729, SAN DIEGO, CA 92198-2729
PO BOX 270730, SAN DIEGO, CA 92198-2730
PO BOX 270731, SAN DIEGO, CA 92198-2731
PO BOX 270732, SAN DIEGO, CA 92198-2732
PO BOX 270733, SAN DIEGO, CA 92198-2733
PO BOX 270734, SAN DIEGO, CA 92198-2734
PO BOX 270735, SAN DIEGO, CA 92198-2735
PO BOX 270736, SAN DIEGO, CA 92198-2736
PO BOX 270737, SAN DIEGO, CA 92198-2737
PO BOX 270738, SAN DIEGO, CA 92198-2738
PO BOX 270739, SAN DIEGO, CA 92198-2739
PO BOX 270740, SAN DIEGO, CA 92198-2740
PO BOX 270741, SAN DIEGO, CA 92198-2741
PO BOX 270742, SAN DIEGO, CA 92198-2742
PO BOX 270743, SAN DIEGO, CA 92198-2743
PO BOX 270744, SAN DIEGO, CA 92198-2744
PO BOX 270745, SAN DIEGO, CA 92198-2745
PO BOX 270746, SAN DIEGO, CA 92198-2746
PO BOX 270747, SAN DIEGO, CA 92198-2747
PO BOX 270748, SAN DIEGO, CA 92198-2748
PO BOX 270749, SAN DIEGO, CA 92198-2749
PO BOX 270750, SAN DIEGO, CA 92198-2750
PO BOX 270751, SAN DIEGO, CA 92198-2751
PO BOX 270752, SAN DIEGO, CA 92198-2752
PO BOX 270753, SAN DIEGO, CA 92198-2753
PO BOX 270754, SAN DIEGO, CA 92198-2754
PO BOX 270755, SAN DIEGO, CA 92198-2755
PO BOX 270756, SAN DIEGO, CA 92198-2756
PO BOX 270757, SAN DIEGO, CA 92198-2757
PO BOX 270758, SAN DIEGO, CA 92198-2758
PO BOX 270759, SAN DIEGO, CA 92198-2759
PO BOX 270760, SAN DIEGO, CA 92198-2760
PO BOX 270761, SAN DIEGO, CA 92198-2761
PO BOX 270762, SAN DIEGO, CA 92198-2762
PO BOX 270763, SAN DIEGO, CA 92198-2763
PO BOX 270764, SAN DIEGO, CA 92198-2764
PO BOX 270765, SAN DIEGO, CA 92198-2765
PO BOX 270766, SAN DIEGO, CA 92198-2766
PO BOX 270767, SAN DIEGO, CA 92198-2767
PO BOX 270768, SAN DIEGO, CA 92198-2768
PO BOX 270769, SAN DIEGO, CA 92198-2769
PO BOX 270770, SAN DIEGO, CA 92198-2770
PO BOX 270771, SAN DIEGO, CA 92198-2771
PO BOX 270772, SAN DIEGO, CA 92198-2772
PO BOX 270773, SAN DIEGO, CA 92198-2773
PO BOX 270774, SAN DIEGO, CA 92198-2774
PO BOX 270775, SAN DIEGO, CA 92198-2775
PO BOX 270776, SAN DIEGO, CA 92198-2776
PO BOX 270777, SAN DIEGO, CA 92198-2777
PO BOX 270778, SAN DIEGO, CA 92198-2778
PO BOX 270779, SAN DIEGO, CA 92198-2779
PO BOX 270780, SAN DIEGO, CA 92198-2780
PO BOX 270781, SAN DIEGO, CA 92198-2781
PO BOX 270782, SAN DIEGO, CA 92198-2782
PO BOX 270783, SAN DIEGO, CA 92198-2783
PO BOX 270784, SAN DIEGO, CA 92198-2784
PO BOX 270785, SAN DIEGO, CA 92198-2785
PO BOX 270786, SAN DIEGO, CA 92198-2786
PO BOX 270787, SAN DIEGO, CA 92198-2787
PO BOX 270788, SAN DIEGO, CA 92198-2788
PO BOX 270789, SAN DIEGO, CA 92198-2789
PO BOX 270790, SAN DIEGO, CA 92198-2790
PO BOX 270791, SAN DIEGO, CA 92198-2791
PO BOX 270792, SAN DIEGO, CA 92198-2792
PO BOX 270793, SAN DIEGO, CA 92198-2793
PO BOX 270794, SAN DIEGO, CA 92198-2794
PO BOX 270795, SAN DIEGO, CA 92198-2795
PO BOX 270796, SAN DIEGO, CA 92198-2796
PO BOX 270797, SAN DIEGO, CA 92198-2797
PO BOX 270798, SAN DIEGO, CA 92198-2798
PO BOX 270799, SAN DIEGO, CA 92198-2799
PO BOX 270800, SAN DIEGO, CA 92198-2800
PO BOX 270801, SAN DIEGO, CA 92198-2801
PO BOX 270802, SAN DIEGO, CA 92198-2802
PO BOX 270803, SAN DIEGO, CA 92198-2803
PO BOX 270804, SAN DIEGO, CA 92198-2804
PO BOX 270805, SAN DIEGO, CA 92198-2805
PO BOX 270806, SAN DIEGO, CA 92198-2806
PO BOX 270807, SAN DIEGO, CA 92198-2807
PO BOX 270808, SAN DIEGO, CA 92198-2808
PO BOX 270809, SAN DIEGO, CA 92198-2809
PO BOX 270810, SAN DIEGO, CA 92198-2810
PO BOX 270811, SAN DIEGO, CA 92198-2811
PO BOX 270812, SAN DIEGO, CA 92198-2812
PO BOX 270813, SAN DIEGO, CA 92198-2813
PO BOX 270814, SAN DIEGO, CA 92198-2814
PO BOX 270815, SAN DIEGO, CA 92198-2815
PO BOX 270816, SAN DIEGO, CA 92198-2816
PO BOX 270817, SAN DIEGO, CA 92198-2817
PO BOX 270818, SAN DIEGO, CA 92198-2818
PO BOX 270819, SAN DIEGO, CA 92198-2819
PO BOX 270820, SAN DIEGO, CA 92198-2820
PO BOX 270821, SAN DIEGO, CA 92198-2821
PO BOX 270822, SAN DIEGO, CA 92198-2822
PO BOX 270823, SAN DIEGO, CA 92198-2823
PO BOX 270824, SAN DIEGO, CA 92198-2824
PO BOX 270825, SAN DIEGO, CA 92198-2825
PO BOX 270826, SAN DIEGO, CA 92198-2826
PO BOX 270827, SAN DIEGO, CA 92198-2827
PO BOX 270828, SAN DIEGO, CA 92198-2828
PO BOX 270829, SAN DIEGO, CA 92198-2829
PO BOX 270830, SAN DIEGO, CA 92198-2830
PO BOX 270831, SAN DIEGO, CA 92198-2831
PO BOX 270832, SAN DIEGO, CA 92198-2832
PO BOX 270833, SAN DIEGO, CA 92198-2833
PO BOX 270834, SAN DIEGO, CA 92198-2834
PO BOX 270835, SAN DIEGO, CA 92198-2835
PO BOX 270836, SAN DIEGO, CA 92198-2836
PO BOX 270837, SAN DIEGO, CA 92198-2837
PO BOX 270838, SAN DIEGO, CA 92198-2838
PO BOX 270839, SAN DIEGO, CA 92198-2839
PO BOX 270840, SAN DIEGO, CA 92198-2840
PO BOX 270841, SAN DIEGO, CA 92198-2841
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