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 782412, PHILADELPHIA, PA 19178-2412
PO BOX 782413, PHILADELPHIA, PA 19178-2413
PO BOX 782414, PHILADELPHIA, PA 19178-2414
PO BOX 782415, PHILADELPHIA, PA 19178-2415
PO BOX 782416, PHILADELPHIA, PA 19178-2416
PO BOX 782417, PHILADELPHIA, PA 19178-2417
PO BOX 782418, PHILADELPHIA, PA 19178-2418
PO BOX 782419, PHILADELPHIA, PA 19178-2419
PO BOX 782420, PHILADELPHIA, PA 19178-2420
PO BOX 782421, PHILADELPHIA, PA 19178-2421
PO BOX 782422, PHILADELPHIA, PA 19178-2422
PO BOX 782423, PHILADELPHIA, PA 19178-2423
PO BOX 782424, PHILADELPHIA, PA 19178-2424
PO BOX 782425, PHILADELPHIA, PA 19178-2425
PO BOX 782426, PHILADELPHIA, PA 19178-2426
PO BOX 782427, PHILADELPHIA, PA 19178-2427
PO BOX 782428, PHILADELPHIA, PA 19178-2428
PO BOX 782429, PHILADELPHIA, PA 19178-2429
PO BOX 782430, PHILADELPHIA, PA 19178-2430
PO BOX 782431, PHILADELPHIA, PA 19178-2431
PO BOX 782432, PHILADELPHIA, PA 19178-2432
PO BOX 782433, PHILADELPHIA, PA 19178-2433
PO BOX 782434, PHILADELPHIA, PA 19178-2434
PO BOX 782435, PHILADELPHIA, PA 19178-2435
PO BOX 782436, PHILADELPHIA, PA 19178-2436
PO BOX 782437, PHILADELPHIA, PA 19178-2437
PO BOX 782438, PHILADELPHIA, PA 19178-2438
PO BOX 782439, PHILADELPHIA, PA 19178-2439
PO BOX 782440, PHILADELPHIA, PA 19178-2440
PO BOX 782441, PHILADELPHIA, PA 19178-2441
PO BOX 782442, PHILADELPHIA, PA 19178-2442
PO BOX 782443, PHILADELPHIA, PA 19178-2443
PO BOX 782444, PHILADELPHIA, PA 19178-2444
PO BOX 782445, PHILADELPHIA, PA 19178-2445
PO BOX 782446, PHILADELPHIA, PA 19178-2446
PO BOX 782447, PHILADELPHIA, PA 19178-2447
PO BOX 782448, PHILADELPHIA, PA 19178-2448
PO BOX 782449, PHILADELPHIA, PA 19178-2449
PO BOX 782450, PHILADELPHIA, PA 19178-2450
PO BOX 782451, PHILADELPHIA, PA 19178-2451
PO BOX 782452, PHILADELPHIA, PA 19178-2452
PO BOX 782453, PHILADELPHIA, PA 19178-2453
PO BOX 782454, PHILADELPHIA, PA 19178-2454
PO BOX 782455, PHILADELPHIA, PA 19178-2455
PO BOX 782456, PHILADELPHIA, PA 19178-2456
PO BOX 782457, PHILADELPHIA, PA 19178-2457
PO BOX 782458, PHILADELPHIA, PA 19178-2458
PO BOX 782459, PHILADELPHIA, PA 19178-2459
PO BOX 782460, PHILADELPHIA, PA 19178-2460
PO BOX 782461, PHILADELPHIA, PA 19178-2461
PO BOX 782462, PHILADELPHIA, PA 19178-2462
PO BOX 782463, PHILADELPHIA, PA 19178-2463
PO BOX 782464, PHILADELPHIA, PA 19178-2464
PO BOX 782465, PHILADELPHIA, PA 19178-2465
PO BOX 782466, PHILADELPHIA, PA 19178-2466
PO BOX 782467, PHILADELPHIA, PA 19178-2467
PO BOX 782468, PHILADELPHIA, PA 19178-2468
PO BOX 782469, PHILADELPHIA, PA 19178-2469
PO BOX 782470, PHILADELPHIA, PA 19178-2470
PO BOX 782471, PHILADELPHIA, PA 19178-2471
PO BOX 782472, PHILADELPHIA, PA 19178-2472
PO BOX 782473, PHILADELPHIA, PA 19178-2473
PO BOX 782474, PHILADELPHIA, PA 19178-2474
PO BOX 782475, PHILADELPHIA, PA 19178-2475
PO BOX 782476, PHILADELPHIA, PA 19178-2476
PO BOX 782477, PHILADELPHIA, PA 19178-2477
PO BOX 782478, PHILADELPHIA, PA 19178-2478
PO BOX 782479, PHILADELPHIA, PA 19178-2479
PO BOX 782480, PHILADELPHIA, PA 19178-2480
PO BOX 782481, PHILADELPHIA, PA 19178-2481
PO BOX 782482, PHILADELPHIA, PA 19178-2482
PO BOX 782483, PHILADELPHIA, PA 19178-2483
PO BOX 782484, PHILADELPHIA, PA 19178-2484
PO BOX 782485, PHILADELPHIA, PA 19178-2485
PO BOX 782486, PHILADELPHIA, PA 19178-2486
PO BOX 782487, PHILADELPHIA, PA 19178-2487
PO BOX 782488, PHILADELPHIA, PA 19178-2488
PO BOX 782489, PHILADELPHIA, PA 19178-2489
PO BOX 782490, PHILADELPHIA, PA 19178-2490
PO BOX 782491, PHILADELPHIA, PA 19178-2491
PO BOX 782492, PHILADELPHIA, PA 19178-2492
PO BOX 782493, PHILADELPHIA, PA 19178-2493
PO BOX 782494, PHILADELPHIA, PA 19178-2494
PO BOX 782495, PHILADELPHIA, PA 19178-2495
PO BOX 782496, PHILADELPHIA, PA 19178-2496
PO BOX 782497, PHILADELPHIA, PA 19178-2497
PO BOX 782498, PHILADELPHIA, PA 19178-2498
PO BOX 782499, PHILADELPHIA, PA 19178-2499
PO BOX 782500, PHILADELPHIA, PA 19178-2500
PO BOX 782501, PHILADELPHIA, PA 19178-2501
PO BOX 782502, PHILADELPHIA, PA 19178-2502
PO BOX 782503, PHILADELPHIA, PA 19178-2503
PO BOX 782504, PHILADELPHIA, PA 19178-2504
PO BOX 782505, PHILADELPHIA, PA 19178-2505
PO BOX 782506, PHILADELPHIA, PA 19178-2506
PO BOX 782507, PHILADELPHIA, PA 19178-2507
PO BOX 782508, PHILADELPHIA, PA 19178-2508
PO BOX 782509, PHILADELPHIA, PA 19178-2509
PO BOX 782510, PHILADELPHIA, PA 19178-2510
PO BOX 782511, PHILADELPHIA, PA 19178-2511
PO BOX 782512, PHILADELPHIA, PA 19178-2512
PO BOX 782513, PHILADELPHIA, PA 19178-2513
PO BOX 782514, PHILADELPHIA, PA 19178-2514
PO BOX 782515, PHILADELPHIA, PA 19178-2515
PO BOX 782516, PHILADELPHIA, PA 19178-2516
PO BOX 782517, PHILADELPHIA, PA 19178-2517
PO BOX 782518, PHILADELPHIA, PA 19178-2518
PO BOX 782519, PHILADELPHIA, PA 19178-2519
PO BOX 782520, PHILADELPHIA, PA 19178-2520
PO BOX 782521, PHILADELPHIA, PA 19178-2521
PO BOX 782522, PHILADELPHIA, PA 19178-2522
PO BOX 782523, PHILADELPHIA, PA 19178-2523
PO BOX 782524, PHILADELPHIA, PA 19178-2524
PO BOX 782525, PHILADELPHIA, PA 19178-2525
PO BOX 782526, PHILADELPHIA, PA 19178-2526
PO BOX 782527, PHILADELPHIA, PA 19178-2527
PO BOX 782528, PHILADELPHIA, PA 19178-2528
PO BOX 782529, PHILADELPHIA, PA 19178-2529
PO BOX 782530, PHILADELPHIA, PA 19178-2530
PO BOX 782531, PHILADELPHIA, PA 19178-2531
PO BOX 782532, PHILADELPHIA, PA 19178-2532
PO BOX 782533, PHILADELPHIA, PA 19178-2533
PO BOX 782534, PHILADELPHIA, PA 19178-2534
PO BOX 782535, PHILADELPHIA, PA 19178-2535
PO BOX 782536, PHILADELPHIA, PA 19178-2536
PO BOX 782537, PHILADELPHIA, PA 19178-2537
PO BOX 782538, PHILADELPHIA, PA 19178-2538
PO BOX 782539, PHILADELPHIA, PA 19178-2539
PO BOX 782540, PHILADELPHIA, PA 19178-2540
PO BOX 782541, PHILADELPHIA, PA 19178-2541
PO BOX 782542, PHILADELPHIA, PA 19178-2542
PO BOX 782543, PHILADELPHIA, PA 19178-2543
PO BOX 782544, PHILADELPHIA, PA 19178-2544
PO BOX 782545, PHILADELPHIA, PA 19178-2545
PO BOX 782546, PHILADELPHIA, PA 19178-2546
PO BOX 782547, PHILADELPHIA, PA 19178-2547
PO BOX 782548, PHILADELPHIA, PA 19178-2548
PO BOX 782549, PHILADELPHIA, PA 19178-2549
PO BOX 782550, PHILADELPHIA, PA 19178-2550
PO BOX 782551, PHILADELPHIA, PA 19178-2551
PO BOX 782552, PHILADELPHIA, PA 19178-2552
PO BOX 782553, PHILADELPHIA, PA 19178-2553
PO BOX 782554, PHILADELPHIA, PA 19178-2554
PO BOX 782555, PHILADELPHIA, PA 19178-2555
PO BOX 782556, PHILADELPHIA, PA 19178-2556
PO BOX 782557, PHILADELPHIA, PA 19178-2557
PO BOX 782558, PHILADELPHIA, PA 19178-2558
PO BOX 782559, PHILADELPHIA, PA 19178-2559
PO BOX 782560, PHILADELPHIA, PA 19178-2560
PO BOX 782561, PHILADELPHIA, PA 19178-2561
PO BOX 782562, PHILADELPHIA, PA 19178-2562
PO BOX 782563, PHILADELPHIA, PA 19178-2563
PO BOX 782564, PHILADELPHIA, PA 19178-2564
PO BOX 782565, PHILADELPHIA, PA 19178-2565
PO BOX 782566, PHILADELPHIA, PA 19178-2566
PO BOX 782567, PHILADELPHIA, PA 19178-2567
PO BOX 782568, PHILADELPHIA, PA 19178-2568
PO BOX 782569, PHILADELPHIA, PA 19178-2569
PO BOX 782570, PHILADELPHIA, PA 19178-2570
PO BOX 782571, PHILADELPHIA, PA 19178-2571
PO BOX 782572, PHILADELPHIA, PA 19178-2572
PO BOX 782573, PHILADELPHIA, PA 19178-2573
PO BOX 782574, PHILADELPHIA, PA 19178-2574
PO BOX 782575, PHILADELPHIA, PA 19178-2575
PO BOX 782576, PHILADELPHIA, PA 19178-2576
PO BOX 782577, PHILADELPHIA, PA 19178-2577
PO BOX 782578, PHILADELPHIA, PA 19178-2578
PO BOX 782579, PHILADELPHIA, PA 19178-2579
PO BOX 782580, PHILADELPHIA, PA 19178-2580
PO BOX 782581, PHILADELPHIA, PA 19178-2581
PO BOX 782582, PHILADELPHIA, PA 19178-2582
PO BOX 782583, PHILADELPHIA, PA 19178-2583
PO BOX 782584, PHILADELPHIA, PA 19178-2584
PO BOX 782585, PHILADELPHIA, PA 19178-2585
PO BOX 782586, PHILADELPHIA, PA 19178-2586
PO BOX 782587, PHILADELPHIA, PA 19178-2587
PO BOX 782588, PHILADELPHIA, PA 19178-2588
PO BOX 782589, PHILADELPHIA, PA 19178-2589
PO BOX 782590, PHILADELPHIA, PA 19178-2590
PO BOX 782591, PHILADELPHIA, PA 19178-2591
PO BOX 782592, PHILADELPHIA, PA 19178-2592
PO BOX 782593, PHILADELPHIA, PA 19178-2593
PO BOX 782594, PHILADELPHIA, PA 19178-2594
PO BOX 782595, PHILADELPHIA, PA 19178-2595
PO BOX 782596, PHILADELPHIA, PA 19178-2596
PO BOX 782597, PHILADELPHIA, PA 19178-2597
PO BOX 782598, PHILADELPHIA, PA 19178-2598
PO BOX 782599, PHILADELPHIA, PA 19178-2599
PO BOX 782600, PHILADELPHIA, PA 19178-2600
PO BOX 782601, PHILADELPHIA, PA 19178-2601
PO BOX 782602, PHILADELPHIA, PA 19178-2602
PO BOX 782603, PHILADELPHIA, PA 19178-2603
PO BOX 782604, PHILADELPHIA, PA 19178-2604
PO BOX 782605, PHILADELPHIA, PA 19178-2605
PO BOX 782606, PHILADELPHIA, PA 19178-2606
PO BOX 782607, PHILADELPHIA, PA 19178-2607
PO BOX 782608, PHILADELPHIA, PA 19178-2608
PO BOX 782609, PHILADELPHIA, PA 19178-2609
PO BOX 782610, PHILADELPHIA, PA 19178-2610
PO BOX 782611, PHILADELPHIA, PA 19178-2611
PO BOX 782612, PHILADELPHIA, PA 19178-2612
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