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 12681, WILMINGTON, DE 19850-2681
PO BOX 12682, WILMINGTON, DE 19850-2682
PO BOX 12683, WILMINGTON, DE 19850-2683
PO BOX 12684, WILMINGTON, DE 19850-2684
PO BOX 12685, WILMINGTON, DE 19850-2685
PO BOX 12686, WILMINGTON, DE 19850-2686
PO BOX 12687, WILMINGTON, DE 19850-2687
PO BOX 12688, WILMINGTON, DE 19850-2688
PO BOX 12689, WILMINGTON, DE 19850-2689
PO BOX 12690, WILMINGTON, DE 19850-2690
PO BOX 12691, WILMINGTON, DE 19850-2691
PO BOX 12692, WILMINGTON, DE 19850-2692
PO BOX 12693, WILMINGTON, DE 19850-2693
PO BOX 12694, WILMINGTON, DE 19850-2694
PO BOX 12695, WILMINGTON, DE 19850-2695
PO BOX 12696, WILMINGTON, DE 19850-2696
PO BOX 12697, WILMINGTON, DE 19850-2697
PO BOX 12698, WILMINGTON, DE 19850-2698
PO BOX 12699, WILMINGTON, DE 19850-2699
PO BOX 12700, WILMINGTON, DE 19850-2700
PO BOX 12701, WILMINGTON, DE 19850-2701
PO BOX 12702, WILMINGTON, DE 19850-2702
PO BOX 12703, WILMINGTON, DE 19850-2703
PO BOX 12704, WILMINGTON, DE 19850-2704
PO BOX 12705, WILMINGTON, DE 19850-2705
PO BOX 12706, WILMINGTON, DE 19850-2706
PO BOX 12707, WILMINGTON, DE 19850-2707
PO BOX 12708, WILMINGTON, DE 19850-2708
PO BOX 12709, WILMINGTON, DE 19850-2709
PO BOX 12710, WILMINGTON, DE 19850-2710
PO BOX 12711, WILMINGTON, DE 19850-2711
PO BOX 12712, WILMINGTON, DE 19850-2712
PO BOX 12713, WILMINGTON, DE 19850-2713
PO BOX 12714, WILMINGTON, DE 19850-2714
PO BOX 12715, WILMINGTON, DE 19850-2715
PO BOX 12716, WILMINGTON, DE 19850-2716
PO BOX 12717, WILMINGTON, DE 19850-2717
PO BOX 12718, WILMINGTON, DE 19850-2718
PO BOX 12719, WILMINGTON, DE 19850-2719
PO BOX 12720, WILMINGTON, DE 19850-2720
PO BOX 12721, WILMINGTON, DE 19850-2721
PO BOX 12722, WILMINGTON, DE 19850-2722
PO BOX 12723, WILMINGTON, DE 19850-2723
PO BOX 12724, WILMINGTON, DE 19850-2724
PO BOX 12725, WILMINGTON, DE 19850-2725
PO BOX 12726, WILMINGTON, DE 19850-2726
PO BOX 12727, WILMINGTON, DE 19850-2727
PO BOX 12728, WILMINGTON, DE 19850-2728
PO BOX 12729, WILMINGTON, DE 19850-2729
PO BOX 12730, WILMINGTON, DE 19850-2730
PO BOX 12731, WILMINGTON, DE 19850-2731
PO BOX 12732, WILMINGTON, DE 19850-2732
PO BOX 12733, WILMINGTON, DE 19850-2733
PO BOX 12734, WILMINGTON, DE 19850-2734
PO BOX 12735, WILMINGTON, DE 19850-2735
PO BOX 12736, WILMINGTON, DE 19850-2736
PO BOX 12737, WILMINGTON, DE 19850-2737
PO BOX 12738, WILMINGTON, DE 19850-2738
PO BOX 12739, WILMINGTON, DE 19850-2739
PO BOX 12740, WILMINGTON, DE 19850-2740
PO BOX 12741, WILMINGTON, DE 19850-2741
PO BOX 12742, WILMINGTON, DE 19850-2742
PO BOX 12743, WILMINGTON, DE 19850-2743
PO BOX 12744, WILMINGTON, DE 19850-2744
PO BOX 12745, WILMINGTON, DE 19850-2745
PO BOX 12746, WILMINGTON, DE 19850-2746
PO BOX 12747, WILMINGTON, DE 19850-2747
PO BOX 12748, WILMINGTON, DE 19850-2748
PO BOX 12749, WILMINGTON, DE 19850-2749
PO BOX 12750, WILMINGTON, DE 19850-2750
PO BOX 12751, WILMINGTON, DE 19850-2751
PO BOX 12752, WILMINGTON, DE 19850-2752
PO BOX 12753, WILMINGTON, DE 19850-2753
PO BOX 12754, WILMINGTON, DE 19850-2754
PO BOX 12755, WILMINGTON, DE 19850-2755
PO BOX 12756, WILMINGTON, DE 19850-2756
PO BOX 12757, WILMINGTON, DE 19850-2757
PO BOX 12758, WILMINGTON, DE 19850-2758
PO BOX 12759, WILMINGTON, DE 19850-2759
PO BOX 12760, WILMINGTON, DE 19850-2760
PO BOX 12761, WILMINGTON, DE 19850-2761
PO BOX 12762, WILMINGTON, DE 19850-2762
PO BOX 12763, WILMINGTON, DE 19850-2763
PO BOX 12764, WILMINGTON, DE 19850-2764
PO BOX 12765, WILMINGTON, DE 19850-2765
PO BOX 12766, WILMINGTON, DE 19850-2766
PO BOX 12767, WILMINGTON, DE 19850-2767
PO BOX 12768, WILMINGTON, DE 19850-2768
PO BOX 12769, WILMINGTON, DE 19850-2769
PO BOX 12770, WILMINGTON, DE 19850-2770
PO BOX 12771, WILMINGTON, DE 19850-2771
PO BOX 12772, WILMINGTON, DE 19850-2772
PO BOX 12773, WILMINGTON, DE 19850-2773
PO BOX 12774, WILMINGTON, DE 19850-2774
PO BOX 12775, WILMINGTON, DE 19850-2775
PO BOX 12776, WILMINGTON, DE 19850-2776
PO BOX 12777, WILMINGTON, DE 19850-2777
PO BOX 12778, WILMINGTON, DE 19850-2778
PO BOX 12779, WILMINGTON, DE 19850-2779
PO BOX 12780, WILMINGTON, DE 19850-2780
PO BOX 12781, WILMINGTON, DE 19850-2781
PO BOX 12782, WILMINGTON, DE 19850-2782
PO BOX 12783, WILMINGTON, DE 19850-2783
PO BOX 12784, WILMINGTON, DE 19850-2784
PO BOX 12785, WILMINGTON, DE 19850-2785
PO BOX 12786, WILMINGTON, DE 19850-2786
PO BOX 12787, WILMINGTON, DE 19850-2787
PO BOX 12788, WILMINGTON, DE 19850-2788
PO BOX 12789, WILMINGTON, DE 19850-2789
PO BOX 12790, WILMINGTON, DE 19850-2790
PO BOX 12791, WILMINGTON, DE 19850-2791
PO BOX 12792, WILMINGTON, DE 19850-2792
PO BOX 12793, WILMINGTON, DE 19850-2793
PO BOX 12794, WILMINGTON, DE 19850-2794
PO BOX 12795, WILMINGTON, DE 19850-2795
PO BOX 12796, WILMINGTON, DE 19850-2796
PO BOX 12797, WILMINGTON, DE 19850-2797
PO BOX 12798, WILMINGTON, DE 19850-2798
PO BOX 12799, WILMINGTON, DE 19850-2799
PO BOX 12800, WILMINGTON, DE 19850-2800
PO BOX 12801, WILMINGTON, DE 19850-2801
PO BOX 12802, WILMINGTON, DE 19850-2802
PO BOX 12803, WILMINGTON, DE 19850-2803
PO BOX 12804, WILMINGTON, DE 19850-2804
PO BOX 12805, WILMINGTON, DE 19850-2805
PO BOX 12806, WILMINGTON, DE 19850-2806
PO BOX 12807, WILMINGTON, DE 19850-2807
PO BOX 12808, WILMINGTON, DE 19850-2808
PO BOX 12809, WILMINGTON, DE 19850-2809
PO BOX 12810, WILMINGTON, DE 19850-2810
PO BOX 12811, WILMINGTON, DE 19850-2811
PO BOX 12812, WILMINGTON, DE 19850-2812
PO BOX 12813, WILMINGTON, DE 19850-2813
PO BOX 12814, WILMINGTON, DE 19850-2814
PO BOX 12815, WILMINGTON, DE 19850-2815
PO BOX 12816, WILMINGTON, DE 19850-2816
PO BOX 12817, WILMINGTON, DE 19850-2817
PO BOX 12818, WILMINGTON, DE 19850-2818
PO BOX 12819, WILMINGTON, DE 19850-2819
PO BOX 12820, WILMINGTON, DE 19850-2820
PO BOX 12821, WILMINGTON, DE 19850-2821
PO BOX 12822, WILMINGTON, DE 19850-2822
PO BOX 12823, WILMINGTON, DE 19850-2823
PO BOX 12824, WILMINGTON, DE 19850-2824
PO BOX 12825, WILMINGTON, DE 19850-2825
PO BOX 12826, WILMINGTON, DE 19850-2826
PO BOX 12827, WILMINGTON, DE 19850-2827
PO BOX 12828, WILMINGTON, DE 19850-2828
PO BOX 12829, WILMINGTON, DE 19850-2829
PO BOX 12830, WILMINGTON, DE 19850-2830
PO BOX 12831, WILMINGTON, DE 19850-2831
PO BOX 12832, WILMINGTON, DE 19850-2832
PO BOX 12833, WILMINGTON, DE 19850-2833
PO BOX 12834, WILMINGTON, DE 19850-2834
PO BOX 12835, WILMINGTON, DE 19850-2835
PO BOX 12836, WILMINGTON, DE 19850-2836
PO BOX 12837, WILMINGTON, DE 19850-2837
PO BOX 12838, WILMINGTON, DE 19850-2838
PO BOX 12839, WILMINGTON, DE 19850-2839
PO BOX 12840, WILMINGTON, DE 19850-2840
PO BOX 12841, WILMINGTON, DE 19850-2841
PO BOX 12842, WILMINGTON, DE 19850-2842
PO BOX 12843, WILMINGTON, DE 19850-2843
PO BOX 12844, WILMINGTON, DE 19850-2844
PO BOX 12845, WILMINGTON, DE 19850-2845
PO BOX 12846, WILMINGTON, DE 19850-2846
PO BOX 12847, WILMINGTON, DE 19850-2847
PO BOX 12848, WILMINGTON, DE 19850-2848
PO BOX 12849, WILMINGTON, DE 19850-2849
PO BOX 12850, WILMINGTON, DE 19850-2850
PO BOX 12851, WILMINGTON, DE 19850-2851
PO BOX 12852, WILMINGTON, DE 19850-2852
PO BOX 12853, WILMINGTON, DE 19850-2853
PO BOX 12854, WILMINGTON, DE 19850-2854
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