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 2621, ROCKINGHAM, NC 28380-2621
PO BOX 2622, ROCKINGHAM, NC 28380-2622
PO BOX 2623, ROCKINGHAM, NC 28380-2623
PO BOX 2624, ROCKINGHAM, NC 28380-2624
PO BOX 2625, ROCKINGHAM, NC 28380-2625
PO BOX 2626, ROCKINGHAM, NC 28380-2626
PO BOX 2627, ROCKINGHAM, NC 28380-2627
PO BOX 2628, ROCKINGHAM, NC 28380-2628
PO BOX 2629, ROCKINGHAM, NC 28380-2629
PO BOX 2630, ROCKINGHAM, NC 28380-2630
PO BOX 2631, ROCKINGHAM, NC 28380-2631
PO BOX 2632, ROCKINGHAM, NC 28380-2632
PO BOX 2633, ROCKINGHAM, NC 28380-2633
PO BOX 2634, ROCKINGHAM, NC 28380-2634
PO BOX 2635, ROCKINGHAM, NC 28380-2635
PO BOX 2636, ROCKINGHAM, NC 28380-2636
PO BOX 2637, ROCKINGHAM, NC 28380-2637
PO BOX 2638, ROCKINGHAM, NC 28380-2638
PO BOX 2639, ROCKINGHAM, NC 28380-2639
PO BOX 2640, ROCKINGHAM, NC 28380-2640
PO BOX 2641, ROCKINGHAM, NC 28380-2641
PO BOX 2642, ROCKINGHAM, NC 28380-2642
PO BOX 2643, ROCKINGHAM, NC 28380-2643
PO BOX 2644, ROCKINGHAM, NC 28380-2644
PO BOX 2645, ROCKINGHAM, NC 28380-2645
PO BOX 2646, ROCKINGHAM, NC 28380-2646
PO BOX 2647, ROCKINGHAM, NC 28380-2647
PO BOX 2648, ROCKINGHAM, NC 28380-2648
PO BOX 2649, ROCKINGHAM, NC 28380-2649
PO BOX 2650, ROCKINGHAM, NC 28380-2650
PO BOX 2651, ROCKINGHAM, NC 28380-2651
PO BOX 2652, ROCKINGHAM, NC 28380-2652
PO BOX 2653, ROCKINGHAM, NC 28380-2653
PO BOX 2654, ROCKINGHAM, NC 28380-2654
PO BOX 2655, ROCKINGHAM, NC 28380-2655
PO BOX 2656, ROCKINGHAM, NC 28380-2656
PO BOX 2657, ROCKINGHAM, NC 28380-2657
PO BOX 2658, ROCKINGHAM, NC 28380-2658
PO BOX 2659, ROCKINGHAM, NC 28380-2659
PO BOX 2660, ROCKINGHAM, NC 28380-2660
PO BOX 2661, ROCKINGHAM, NC 28380-2661
PO BOX 2662, ROCKINGHAM, NC 28380-2662
PO BOX 2663, ROCKINGHAM, NC 28380-2663
PO BOX 2664, ROCKINGHAM, NC 28380-2664
PO BOX 2665, ROCKINGHAM, NC 28380-2665
PO BOX 2666, ROCKINGHAM, NC 28380-2666
PO BOX 2667, ROCKINGHAM, NC 28380-2667
PO BOX 2668, ROCKINGHAM, NC 28380-2668
PO BOX 2669, ROCKINGHAM, NC 28380-2669
PO BOX 2670, ROCKINGHAM, NC 28380-2670
PO BOX 2671, ROCKINGHAM, NC 28380-2671
PO BOX 2672, ROCKINGHAM, NC 28380-2672
PO BOX 2673, ROCKINGHAM, NC 28380-2673
PO BOX 2674, ROCKINGHAM, NC 28380-2674
PO BOX 2675, ROCKINGHAM, NC 28380-2675
PO BOX 2676, ROCKINGHAM, NC 28380-2676
PO BOX 2677, ROCKINGHAM, NC 28380-2677
PO BOX 2678, ROCKINGHAM, NC 28380-2678
PO BOX 2679, ROCKINGHAM, NC 28380-2679
PO BOX 2680, ROCKINGHAM, NC 28380-2680
PO BOX 2681, ROCKINGHAM, NC 28380-2681
PO BOX 2682, ROCKINGHAM, NC 28380-2682
PO BOX 2683, ROCKINGHAM, NC 28380-2683
PO BOX 2684, ROCKINGHAM, NC 28380-2684
PO BOX 2685, ROCKINGHAM, NC 28380-2685
PO BOX 2686, ROCKINGHAM, NC 28380-2686
PO BOX 2687, ROCKINGHAM, NC 28380-2687
PO BOX 2688, ROCKINGHAM, NC 28380-2688
PO BOX 2689, ROCKINGHAM, NC 28380-2689
PO BOX 2690, ROCKINGHAM, NC 28380-2690
PO BOX 2691, ROCKINGHAM, NC 28380-2691
PO BOX 2692, ROCKINGHAM, NC 28380-2692
PO BOX 2693, ROCKINGHAM, NC 28380-2693
PO BOX 2694, ROCKINGHAM, NC 28380-2694
PO BOX 2695, ROCKINGHAM, NC 28380-2695
PO BOX 2696, ROCKINGHAM, NC 28380-2696
PO BOX 2697, ROCKINGHAM, NC 28380-2697
PO BOX 2698, ROCKINGHAM, NC 28380-2698
PO BOX 2699, ROCKINGHAM, NC 28380-2699
PO BOX 2700, ROCKINGHAM, NC 28380-2700
PO BOX 2701, ROCKINGHAM, NC 28380-2701
PO BOX 2702, ROCKINGHAM, NC 28380-2702
PO BOX 2703, ROCKINGHAM, NC 28380-2703
PO BOX 2704, ROCKINGHAM, NC 28380-2704
PO BOX 2705, ROCKINGHAM, NC 28380-2705
PO BOX 2706, ROCKINGHAM, NC 28380-2706
PO BOX 2707, ROCKINGHAM, NC 28380-2707
PO BOX 2708, ROCKINGHAM, NC 28380-2708
PO BOX 2709, ROCKINGHAM, NC 28380-2709
PO BOX 2710, ROCKINGHAM, NC 28380-2710
PO BOX 2711, ROCKINGHAM, NC 28380-2711
PO BOX 2712, ROCKINGHAM, NC 28380-2712
PO BOX 2713, ROCKINGHAM, NC 28380-2713
PO BOX 2714, ROCKINGHAM, NC 28380-2714
PO BOX 2715, ROCKINGHAM, NC 28380-2715
PO BOX 2716, ROCKINGHAM, NC 28380-2716
PO BOX 2717, ROCKINGHAM, NC 28380-2717
PO BOX 2718, ROCKINGHAM, NC 28380-2718
PO BOX 2719, ROCKINGHAM, NC 28380-2719
PO BOX 2720, ROCKINGHAM, NC 28380-2720
PO BOX 2721, ROCKINGHAM, NC 28380-2721
PO BOX 2722, ROCKINGHAM, NC 28380-2722
PO BOX 2723, ROCKINGHAM, NC 28380-2723
PO BOX 2724, ROCKINGHAM, NC 28380-2724
PO BOX 2725, ROCKINGHAM, NC 28380-2725
PO BOX 2726, ROCKINGHAM, NC 28380-2726
PO BOX 2727, ROCKINGHAM, NC 28380-2727
PO BOX 2728, ROCKINGHAM, NC 28380-2728
PO BOX 2729, ROCKINGHAM, NC 28380-2729
PO BOX 2730, ROCKINGHAM, NC 28380-2730
PO BOX 2731, ROCKINGHAM, NC 28380-2731
PO BOX 2732, ROCKINGHAM, NC 28380-2732
PO BOX 2733, ROCKINGHAM, NC 28380-2733
PO BOX 2734, ROCKINGHAM, NC 28380-2734
PO BOX 2735, ROCKINGHAM, NC 28380-2735
PO BOX 2736, ROCKINGHAM, NC 28380-2736
PO BOX 2737, ROCKINGHAM, NC 28380-2737
PO BOX 2738, ROCKINGHAM, NC 28380-2738
PO BOX 2739, ROCKINGHAM, NC 28380-2739
PO BOX 2740, ROCKINGHAM, NC 28380-2740
PO BOX 2741, ROCKINGHAM, NC 28380-2741
PO BOX 2742, ROCKINGHAM, NC 28380-2742
PO BOX 2743, ROCKINGHAM, NC 28380-2743
PO BOX 2744, ROCKINGHAM, NC 28380-2744
PO BOX 2745, ROCKINGHAM, NC 28380-2745
PO BOX 2746, ROCKINGHAM, NC 28380-2746
PO BOX 2747, ROCKINGHAM, NC 28380-2747
PO BOX 2748, ROCKINGHAM, NC 28380-2748
PO BOX 2749, ROCKINGHAM, NC 28380-2749
PO BOX 2750, ROCKINGHAM, NC 28380-2750
PO BOX 2751, ROCKINGHAM, NC 28380-2751
PO BOX 2752, ROCKINGHAM, NC 28380-2752
PO BOX 2753, ROCKINGHAM, NC 28380-2753
PO BOX 2754, ROCKINGHAM, NC 28380-2754
PO BOX 2755, ROCKINGHAM, NC 28380-2755
PO BOX 2756, ROCKINGHAM, NC 28380-2756
PO BOX 2757, ROCKINGHAM, NC 28380-2757
PO BOX 2758, ROCKINGHAM, NC 28380-2758
PO BOX 2759, ROCKINGHAM, NC 28380-2759
PO BOX 2760, ROCKINGHAM, NC 28380-2760
PO BOX 2761, ROCKINGHAM, NC 28380-2761
PO BOX 2762, ROCKINGHAM, NC 28380-2762
PO BOX 2763, ROCKINGHAM, NC 28380-2763
PO BOX 2764, ROCKINGHAM, NC 28380-2764
PO BOX 2765, ROCKINGHAM, NC 28380-2765
PO BOX 2766, ROCKINGHAM, NC 28380-2766
PO BOX 2767, ROCKINGHAM, NC 28380-2767
PO BOX 2768, ROCKINGHAM, NC 28380-2768
PO BOX 2769, ROCKINGHAM, NC 28380-2769
PO BOX 2770, ROCKINGHAM, NC 28380-2770
PO BOX 2771, ROCKINGHAM, NC 28380-2771
PO BOX 2772, ROCKINGHAM, NC 28380-2772
PO BOX 2773, ROCKINGHAM, NC 28380-2773
PO BOX 2774, ROCKINGHAM, NC 28380-2774
PO BOX 2775, ROCKINGHAM, NC 28380-2775
PO BOX 2776, ROCKINGHAM, NC 28380-2776
PO BOX 2777, ROCKINGHAM, NC 28380-2777
PO BOX 2778, ROCKINGHAM, NC 28380-2778
PO BOX 2779, ROCKINGHAM, NC 28380-2779
PO BOX 2780, ROCKINGHAM, NC 28380-2780
PO BOX 2781, ROCKINGHAM, NC 28380-2781
PO BOX 2782, ROCKINGHAM, NC 28380-2782
PO BOX 2783, ROCKINGHAM, NC 28380-2783
PO BOX 2784, ROCKINGHAM, NC 28380-2784
PO BOX 2785, ROCKINGHAM, NC 28380-2785
PO BOX 2786, ROCKINGHAM, NC 28380-2786
PO BOX 2787, ROCKINGHAM, NC 28380-2787
PO BOX 2788, ROCKINGHAM, NC 28380-2788
PO BOX 2789, ROCKINGHAM, NC 28380-2789
PO BOX 2790, ROCKINGHAM, NC 28380-2790
PO BOX 2791, ROCKINGHAM, NC 28380-2791
PO BOX 2792, ROCKINGHAM, NC 28380-2792
PO BOX 2793, ROCKINGHAM, NC 28380-2793
PO BOX 2794, ROCKINGHAM, NC 28380-2794
PO BOX 2795, ROCKINGHAM, NC 28380-2795
PO BOX 2796, ROCKINGHAM, NC 28380-2796
PO BOX 2797, ROCKINGHAM, NC 28380-2797
PO BOX 2798, ROCKINGHAM, NC 28380-2798
PO BOX 2799, ROCKINGHAM, NC 28380-2799
PO BOX 2800, ROCKINGHAM, NC 28380-2800
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