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 2541, BORREGO SPRINGS, CA 92004-2541
PO BOX 2542, BORREGO SPRINGS, CA 92004-2542
PO BOX 2543, BORREGO SPRINGS, CA 92004-2543
PO BOX 2544, BORREGO SPRINGS, CA 92004-2544
PO BOX 2545, BORREGO SPRINGS, CA 92004-2545
PO BOX 2546, BORREGO SPRINGS, CA 92004-2546
PO BOX 2547, BORREGO SPRINGS, CA 92004-2547
PO BOX 2548, BORREGO SPRINGS, CA 92004-2548
PO BOX 2549, BORREGO SPRINGS, CA 92004-2549
PO BOX 2550, BORREGO SPRINGS, CA 92004-2550
PO BOX 2551, BORREGO SPRINGS, CA 92004-2551
PO BOX 2552, BORREGO SPRINGS, CA 92004-2552
PO BOX 2553, BORREGO SPRINGS, CA 92004-2553
PO BOX 2554, BORREGO SPRINGS, CA 92004-2554
PO BOX 2555, BORREGO SPRINGS, CA 92004-2555
PO BOX 2556, BORREGO SPRINGS, CA 92004-2556
PO BOX 2557, BORREGO SPRINGS, CA 92004-2557
PO BOX 2558, BORREGO SPRINGS, CA 92004-2558
PO BOX 2559, BORREGO SPRINGS, CA 92004-2559
PO BOX 2560, BORREGO SPRINGS, CA 92004-2560
PO BOX 2561, BORREGO SPRINGS, CA 92004-2561
PO BOX 2562, BORREGO SPRINGS, CA 92004-2562
PO BOX 2563, BORREGO SPRINGS, CA 92004-2563
PO BOX 2564, BORREGO SPRINGS, CA 92004-2564
PO BOX 2565, BORREGO SPRINGS, CA 92004-2565
PO BOX 2566, BORREGO SPRINGS, CA 92004-2566
PO BOX 2567, BORREGO SPRINGS, CA 92004-2567
PO BOX 2568, BORREGO SPRINGS, CA 92004-2568
PO BOX 2569, BORREGO SPRINGS, CA 92004-2569
PO BOX 2570, BORREGO SPRINGS, CA 92004-2570
PO BOX 2571, BORREGO SPRINGS, CA 92004-2571
PO BOX 2572, BORREGO SPRINGS, CA 92004-2572
PO BOX 2573, BORREGO SPRINGS, CA 92004-2573
PO BOX 2574, BORREGO SPRINGS, CA 92004-2574
PO BOX 2575, BORREGO SPRINGS, CA 92004-2575
PO BOX 2576, BORREGO SPRINGS, CA 92004-2576
PO BOX 2577, BORREGO SPRINGS, CA 92004-2577
PO BOX 2578, BORREGO SPRINGS, CA 92004-2578
PO BOX 2579, BORREGO SPRINGS, CA 92004-2579
PO BOX 2580, BORREGO SPRINGS, CA 92004-2580
PO BOX 2581, BORREGO SPRINGS, CA 92004-2581
PO BOX 2582, BORREGO SPRINGS, CA 92004-2582
PO BOX 2583, BORREGO SPRINGS, CA 92004-2583
PO BOX 2584, BORREGO SPRINGS, CA 92004-2584
PO BOX 2585, BORREGO SPRINGS, CA 92004-2585
PO BOX 2586, BORREGO SPRINGS, CA 92004-2586
PO BOX 2587, BORREGO SPRINGS, CA 92004-2587
PO BOX 2588, BORREGO SPRINGS, CA 92004-2588
PO BOX 2589, BORREGO SPRINGS, CA 92004-2589
PO BOX 2590, BORREGO SPRINGS, CA 92004-2590
PO BOX 2591, BORREGO SPRINGS, CA 92004-2591
PO BOX 2592, BORREGO SPRINGS, CA 92004-2592
PO BOX 2593, BORREGO SPRINGS, CA 92004-2593
PO BOX 2594, BORREGO SPRINGS, CA 92004-2594
PO BOX 2595, BORREGO SPRINGS, CA 92004-2595
PO BOX 2596, BORREGO SPRINGS, CA 92004-2596
PO BOX 2597, BORREGO SPRINGS, CA 92004-2597
PO BOX 2598, BORREGO SPRINGS, CA 92004-2598
PO BOX 2599, BORREGO SPRINGS, CA 92004-2599
PO BOX 2600, BORREGO SPRINGS, CA 92004-2600
PO BOX 2601, BORREGO SPRINGS, CA 92004-2601
PO BOX 2602, BORREGO SPRINGS, CA 92004-2602
PO BOX 2603, BORREGO SPRINGS, CA 92004-2603
PO BOX 2604, BORREGO SPRINGS, CA 92004-2604
PO BOX 2605, BORREGO SPRINGS, CA 92004-2605
PO BOX 2606, BORREGO SPRINGS, CA 92004-2606
PO BOX 2607, BORREGO SPRINGS, CA 92004-2607
PO BOX 2608, BORREGO SPRINGS, CA 92004-2608
PO BOX 2609, BORREGO SPRINGS, CA 92004-2609
PO BOX 2610, BORREGO SPRINGS, CA 92004-2610
PO BOX 2611, BORREGO SPRINGS, CA 92004-2611
PO BOX 2612, BORREGO SPRINGS, CA 92004-2612
PO BOX 2613, BORREGO SPRINGS, CA 92004-2613
PO BOX 2614, BORREGO SPRINGS, CA 92004-2614
PO BOX 2615, BORREGO SPRINGS, CA 92004-2615
PO BOX 2616, BORREGO SPRINGS, CA 92004-2616
PO BOX 2617, BORREGO SPRINGS, CA 92004-2617
PO BOX 2618, BORREGO SPRINGS, CA 92004-2618
PO BOX 2619, BORREGO SPRINGS, CA 92004-2619
PO BOX 2620, BORREGO SPRINGS, CA 92004-2620
PO BOX 2621, BORREGO SPRINGS, CA 92004-2621
PO BOX 2622, BORREGO SPRINGS, CA 92004-2622
PO BOX 2623, BORREGO SPRINGS, CA 92004-2623
PO BOX 2624, BORREGO SPRINGS, CA 92004-2624
PO BOX 2625, BORREGO SPRINGS, CA 92004-2625
PO BOX 2626, BORREGO SPRINGS, CA 92004-2626
PO BOX 2627, BORREGO SPRINGS, CA 92004-2627
PO BOX 2628, BORREGO SPRINGS, CA 92004-2628
PO BOX 2629, BORREGO SPRINGS, CA 92004-2629
PO BOX 2630, BORREGO SPRINGS, CA 92004-2630
PO BOX 2631, BORREGO SPRINGS, CA 92004-2631
PO BOX 2632, BORREGO SPRINGS, CA 92004-2632
PO BOX 2633, BORREGO SPRINGS, CA 92004-2633
PO BOX 2634, BORREGO SPRINGS, CA 92004-2634
PO BOX 2635, BORREGO SPRINGS, CA 92004-2635
PO BOX 2636, BORREGO SPRINGS, CA 92004-2636
PO BOX 2637, BORREGO SPRINGS, CA 92004-2637
PO BOX 2638, BORREGO SPRINGS, CA 92004-2638
PO BOX 2639, BORREGO SPRINGS, CA 92004-2639
PO BOX 2640, BORREGO SPRINGS, CA 92004-2640
PO BOX 2641, BORREGO SPRINGS, CA 92004-2641
PO BOX 2642, BORREGO SPRINGS, CA 92004-2642
PO BOX 2643, BORREGO SPRINGS, CA 92004-2643
PO BOX 2644, BORREGO SPRINGS, CA 92004-2644
PO BOX 2645, BORREGO SPRINGS, CA 92004-2645
PO BOX 2646, BORREGO SPRINGS, CA 92004-2646
PO BOX 2647, BORREGO SPRINGS, CA 92004-2647
PO BOX 2648, BORREGO SPRINGS, CA 92004-2648
PO BOX 2649, BORREGO SPRINGS, CA 92004-2649
PO BOX 2650, BORREGO SPRINGS, CA 92004-2650
PO BOX 2651, BORREGO SPRINGS, CA 92004-2651
PO BOX 2652, BORREGO SPRINGS, CA 92004-2652
PO BOX 2653, BORREGO SPRINGS, CA 92004-2653
PO BOX 2654, BORREGO SPRINGS, CA 92004-2654
PO BOX 2655, BORREGO SPRINGS, CA 92004-2655
PO BOX 2656, BORREGO SPRINGS, CA 92004-2656
PO BOX 2657, BORREGO SPRINGS, CA 92004-2657
PO BOX 2658, BORREGO SPRINGS, CA 92004-2658
PO BOX 2659, BORREGO SPRINGS, CA 92004-2659
PO BOX 2660, BORREGO SPRINGS, CA 92004-2660
PO BOX 2661, BORREGO SPRINGS, CA 92004-2661
PO BOX 2662, BORREGO SPRINGS, CA 92004-2662
PO BOX 2663, BORREGO SPRINGS, CA 92004-2663
PO BOX 2664, BORREGO SPRINGS, CA 92004-2664
PO BOX 2665, BORREGO SPRINGS, CA 92004-2665
PO BOX 2666, BORREGO SPRINGS, CA 92004-2666
PO BOX 2667, BORREGO SPRINGS, CA 92004-2667
PO BOX 2668, BORREGO SPRINGS, CA 92004-2668
PO BOX 2669, BORREGO SPRINGS, CA 92004-2669
PO BOX 2670, BORREGO SPRINGS, CA 92004-2670
PO BOX 2671, BORREGO SPRINGS, CA 92004-2671
PO BOX 2672, BORREGO SPRINGS, CA 92004-2672
PO BOX 2673, BORREGO SPRINGS, CA 92004-2673
PO BOX 2674, BORREGO SPRINGS, CA 92004-2674
PO BOX 2675, BORREGO SPRINGS, CA 92004-2675
PO BOX 2676, BORREGO SPRINGS, CA 92004-2676
PO BOX 2677, BORREGO SPRINGS, CA 92004-2677
PO BOX 2678, BORREGO SPRINGS, CA 92004-2678
PO BOX 2679, BORREGO SPRINGS, CA 92004-2679
PO BOX 2680, BORREGO SPRINGS, CA 92004-2680
PO BOX 2681, BORREGO SPRINGS, CA 92004-2681
PO BOX 2682, BORREGO SPRINGS, CA 92004-2682
PO BOX 2683, BORREGO SPRINGS, CA 92004-2683
PO BOX 2684, BORREGO SPRINGS, CA 92004-2684
PO BOX 2685, BORREGO SPRINGS, CA 92004-2685
PO BOX 2686, BORREGO SPRINGS, CA 92004-2686
PO BOX 2687, BORREGO SPRINGS, CA 92004-2687
PO BOX 2688, BORREGO SPRINGS, CA 92004-2688
PO BOX 2689, BORREGO SPRINGS, CA 92004-2689
PO BOX 2690, BORREGO SPRINGS, CA 92004-2690
PO BOX 2691, BORREGO SPRINGS, CA 92004-2691
PO BOX 2692, BORREGO SPRINGS, CA 92004-2692
PO BOX 2693, BORREGO SPRINGS, CA 92004-2693
PO BOX 2694, BORREGO SPRINGS, CA 92004-2694
PO BOX 2695, BORREGO SPRINGS, CA 92004-2695
PO BOX 2696, BORREGO SPRINGS, CA 92004-2696
PO BOX 2697, BORREGO SPRINGS, CA 92004-2697
PO BOX 2698, BORREGO SPRINGS, CA 92004-2698
PO BOX 2699, BORREGO SPRINGS, CA 92004-2699
PO BOX 2700, BORREGO SPRINGS, CA 92004-2700
PO BOX 2701, BORREGO SPRINGS, CA 92004-2701
PO BOX 2702, BORREGO SPRINGS, CA 92004-2702
PO BOX 2703, BORREGO SPRINGS, CA 92004-2703
PO BOX 2704, BORREGO SPRINGS, CA 92004-2704
PO BOX 2705, BORREGO SPRINGS, CA 92004-2705
PO BOX 2706, BORREGO SPRINGS, CA 92004-2706
PO BOX 2707, BORREGO SPRINGS, CA 92004-2707
PO BOX 2708, BORREGO SPRINGS, CA 92004-2708
PO BOX 2709, BORREGO SPRINGS, CA 92004-2709
PO BOX 2710, BORREGO SPRINGS, CA 92004-2710
PO BOX 2711, BORREGO SPRINGS, CA 92004-2711
PO BOX 2712, BORREGO SPRINGS, CA 92004-2712
PO BOX 2713, BORREGO SPRINGS, CA 92004-2713
PO BOX 2714, BORREGO SPRINGS, CA 92004-2714
PO BOX 2715, BORREGO SPRINGS, CA 92004-2715
PO BOX 2716, BORREGO SPRINGS, CA 92004-2716
PO BOX 2717, BORREGO SPRINGS, CA 92004-2717
PO BOX 2718, BORREGO SPRINGS, CA 92004-2718
PO BOX 2719, BORREGO SPRINGS, CA 92004-2719
PO BOX 2720, BORREGO SPRINGS, CA 92004-2720
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