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 2540, CARLSBAD, CA 92018-2540
PO BOX 2541, CARLSBAD, CA 92018-2541
PO BOX 2542, CARLSBAD, CA 92018-2542
PO BOX 2543, CARLSBAD, CA 92018-2543
PO BOX 2544, CARLSBAD, CA 92018-2544
PO BOX 2545, CARLSBAD, CA 92018-2545
PO BOX 2546, CARLSBAD, CA 92018-2546
PO BOX 2547, CARLSBAD, CA 92018-2547
PO BOX 2548, CARLSBAD, CA 92018-2548
PO BOX 2549, CARLSBAD, CA 92018-2549
PO BOX 2550, CARLSBAD, CA 92018-2550
PO BOX 2551, CARLSBAD, CA 92018-2551
PO BOX 2552, CARLSBAD, CA 92018-2552
PO BOX 2553, CARLSBAD, CA 92018-2553
PO BOX 2554, CARLSBAD, CA 92018-2554
PO BOX 2555, CARLSBAD, CA 92018-2555
PO BOX 2556, CARLSBAD, CA 92018-2556
PO BOX 2557, CARLSBAD, CA 92018-2557
PO BOX 2558, CARLSBAD, CA 92018-2558
PO BOX 2559, CARLSBAD, CA 92018-2559
PO BOX 2560, CARLSBAD, CA 92018-2560
PO BOX 2561, CARLSBAD, CA 92018-2561
PO BOX 2562, CARLSBAD, CA 92018-2562
PO BOX 2563, CARLSBAD, CA 92018-2563
PO BOX 2564, CARLSBAD, CA 92018-2564
PO BOX 2565, CARLSBAD, CA 92018-2565
PO BOX 2566, CARLSBAD, CA 92018-2566
PO BOX 2567, CARLSBAD, CA 92018-2567
PO BOX 2568, CARLSBAD, CA 92018-2568
PO BOX 2569, CARLSBAD, CA 92018-2569
PO BOX 2570, CARLSBAD, CA 92018-2570
PO BOX 2571, CARLSBAD, CA 92018-2571
PO BOX 2572, CARLSBAD, CA 92018-2572
PO BOX 2573, CARLSBAD, CA 92018-2573
PO BOX 2574, CARLSBAD, CA 92018-2574
PO BOX 2575, CARLSBAD, CA 92018-2575
PO BOX 2576, CARLSBAD, CA 92018-2576
PO BOX 2577, CARLSBAD, CA 92018-2577
PO BOX 2578, CARLSBAD, CA 92018-2578
PO BOX 2579, CARLSBAD, CA 92018-2579
PO BOX 2580, CARLSBAD, CA 92018-2580
PO BOX 2581, CARLSBAD, CA 92018-2581
PO BOX 2582, CARLSBAD, CA 92018-2582
PO BOX 2583, CARLSBAD, CA 92018-2583
PO BOX 2584, CARLSBAD, CA 92018-2584
PO BOX 2585, CARLSBAD, CA 92018-2585
PO BOX 2586, CARLSBAD, CA 92018-2586
PO BOX 2587, CARLSBAD, CA 92018-2587
PO BOX 2588, CARLSBAD, CA 92018-2588
PO BOX 2589, CARLSBAD, CA 92018-2589
PO BOX 2590, CARLSBAD, CA 92018-2590
PO BOX 2591, CARLSBAD, CA 92018-2591
PO BOX 2592, CARLSBAD, CA 92018-2592
PO BOX 2593, CARLSBAD, CA 92018-2593
PO BOX 2594, CARLSBAD, CA 92018-2594
PO BOX 2595, CARLSBAD, CA 92018-2595
PO BOX 2596, CARLSBAD, CA 92018-2596
PO BOX 2597, CARLSBAD, CA 92018-2597
PO BOX 2598, CARLSBAD, CA 92018-2598
PO BOX 2599, CARLSBAD, CA 92018-2599
PO BOX 2600, CARLSBAD, CA 92018-2600
PO BOX 2601, CARLSBAD, CA 92018-2601
PO BOX 2602, CARLSBAD, CA 92018-2602
PO BOX 2603, CARLSBAD, CA 92018-2603
PO BOX 2604, CARLSBAD, CA 92018-2604
PO BOX 2605, CARLSBAD, CA 92018-2605
PO BOX 2606, CARLSBAD, CA 92018-2606
PO BOX 2607, CARLSBAD, CA 92018-2607
PO BOX 2608, CARLSBAD, CA 92018-2608
PO BOX 2609, CARLSBAD, CA 92018-2609
PO BOX 2610, CARLSBAD, CA 92018-2610
PO BOX 2611, CARLSBAD, CA 92018-2611
PO BOX 2612, CARLSBAD, CA 92018-2612
PO BOX 2613, CARLSBAD, CA 92018-2613
PO BOX 2614, CARLSBAD, CA 92018-2614
PO BOX 2615, CARLSBAD, CA 92018-2615
PO BOX 2616, CARLSBAD, CA 92018-2616
PO BOX 2617, CARLSBAD, CA 92018-2617
PO BOX 2618, CARLSBAD, CA 92018-2618
PO BOX 2619, CARLSBAD, CA 92018-2619
PO BOX 2620, CARLSBAD, CA 92018-2620
PO BOX 2621, CARLSBAD, CA 92018-2621
PO BOX 2622, CARLSBAD, CA 92018-2622
PO BOX 2623, CARLSBAD, CA 92018-2623
PO BOX 2624, CARLSBAD, CA 92018-2624
PO BOX 2625, CARLSBAD, CA 92018-2625
PO BOX 2626, CARLSBAD, CA 92018-2626
PO BOX 2627, CARLSBAD, CA 92018-2627
PO BOX 2628, CARLSBAD, CA 92018-2628
PO BOX 2629, CARLSBAD, CA 92018-2629
PO BOX 2630, CARLSBAD, CA 92018-2630
PO BOX 2631, CARLSBAD, CA 92018-2631
PO BOX 2632, CARLSBAD, CA 92018-2632
PO BOX 2633, CARLSBAD, CA 92018-2633
PO BOX 2634, CARLSBAD, CA 92018-2634
PO BOX 2635, CARLSBAD, CA 92018-2635
PO BOX 2636, CARLSBAD, CA 92018-2636
PO BOX 2637, CARLSBAD, CA 92018-2637
PO BOX 2638, CARLSBAD, CA 92018-2638
PO BOX 2639, CARLSBAD, CA 92018-2639
PO BOX 2640, CARLSBAD, CA 92018-2640
PO BOX 2641, CARLSBAD, CA 92018-2641
PO BOX 2642, CARLSBAD, CA 92018-2642
PO BOX 2643, CARLSBAD, CA 92018-2643
PO BOX 2644, CARLSBAD, CA 92018-2644
PO BOX 2645, CARLSBAD, CA 92018-2645
PO BOX 2646, CARLSBAD, CA 92018-2646
PO BOX 2647, CARLSBAD, CA 92018-2647
PO BOX 2648, CARLSBAD, CA 92018-2648
PO BOX 2649, CARLSBAD, CA 92018-2649
PO BOX 2650, CARLSBAD, CA 92018-2650
PO BOX 2651, CARLSBAD, CA 92018-2651
PO BOX 2652, CARLSBAD, CA 92018-2652
PO BOX 2653, CARLSBAD, CA 92018-2653
PO BOX 2654, CARLSBAD, CA 92018-2654
PO BOX 2655, CARLSBAD, CA 92018-2655
PO BOX 2656, CARLSBAD, CA 92018-2656
PO BOX 2657, CARLSBAD, CA 92018-2657
PO BOX 2658, CARLSBAD, CA 92018-2658
PO BOX 2659, CARLSBAD, CA 92018-2659
PO BOX 2660, CARLSBAD, CA 92018-2660
PO BOX 2661, CARLSBAD, CA 92018-2661
PO BOX 2662, CARLSBAD, CA 92018-2662
PO BOX 2663, CARLSBAD, CA 92018-2663
PO BOX 2664, CARLSBAD, CA 92018-2664
PO BOX 2665, CARLSBAD, CA 92018-2665
PO BOX 2666, CARLSBAD, CA 92018-2666
PO BOX 2667, CARLSBAD, CA 92018-2667
PO BOX 2668, CARLSBAD, CA 92018-2668
PO BOX 2669, CARLSBAD, CA 92018-2669
PO BOX 2670, CARLSBAD, CA 92018-2670
PO BOX 2671, CARLSBAD, CA 92018-2671
PO BOX 2672, CARLSBAD, CA 92018-2672
PO BOX 2673, CARLSBAD, CA 92018-2673
PO BOX 2674, CARLSBAD, CA 92018-2674
PO BOX 2675, CARLSBAD, CA 92018-2675
PO BOX 2676, CARLSBAD, CA 92018-2676
PO BOX 2677, CARLSBAD, CA 92018-2677
PO BOX 2678, CARLSBAD, CA 92018-2678
PO BOX 2679, CARLSBAD, CA 92018-2679
PO BOX 2680, CARLSBAD, CA 92018-2680
PO BOX 2681, CARLSBAD, CA 92018-2681
PO BOX 2682, CARLSBAD, CA 92018-2682
PO BOX 2683, CARLSBAD, CA 92018-2683
PO BOX 2684, CARLSBAD, CA 92018-2684
PO BOX 2685, CARLSBAD, CA 92018-2685
PO BOX 2686, CARLSBAD, CA 92018-2686
PO BOX 2687, CARLSBAD, CA 92018-2687
PO BOX 2688, CARLSBAD, CA 92018-2688
PO BOX 2689, CARLSBAD, CA 92018-2689
PO BOX 2690, CARLSBAD, CA 92018-2690
PO BOX 2691, CARLSBAD, CA 92018-2691
PO BOX 2692, CARLSBAD, CA 92018-2692
PO BOX 2693, CARLSBAD, CA 92018-2693
Add new comment