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 1351, SALISBURY, MD 21802-1351
PO BOX 1352, SALISBURY, MD 21802-1352
PO BOX 1353, SALISBURY, MD 21802-1353
PO BOX 1354, SALISBURY, MD 21802-1354
PO BOX 1355, SALISBURY, MD 21802-1355
PO BOX 1356, SALISBURY, MD 21802-1356
PO BOX 1357, SALISBURY, MD 21802-1357
PO BOX 1358, SALISBURY, MD 21802-1358
PO BOX 1359, SALISBURY, MD 21802-1359
PO BOX 1360, SALISBURY, MD 21802-1360
PO BOX 1361, SALISBURY, MD 21802-1361
PO BOX 1362, SALISBURY, MD 21802-1362
PO BOX 1363, SALISBURY, MD 21802-1363
PO BOX 1364, SALISBURY, MD 21802-1364
PO BOX 1365, SALISBURY, MD 21802-1365
PO BOX 1366, SALISBURY, MD 21802-1366
PO BOX 1367, SALISBURY, MD 21802-1367
PO BOX 1368, SALISBURY, MD 21802-1368
PO BOX 1369, SALISBURY, MD 21802-1369
PO BOX 1370, SALISBURY, MD 21802-1370
PO BOX 1371, SALISBURY, MD 21802-1371
PO BOX 1372, SALISBURY, MD 21802-1372
PO BOX 1373, SALISBURY, MD 21802-1373
PO BOX 1374, SALISBURY, MD 21802-1374
PO BOX 1375, SALISBURY, MD 21802-1375
PO BOX 1376, SALISBURY, MD 21802-1376
PO BOX 1377, SALISBURY, MD 21802-1377
PO BOX 1378, SALISBURY, MD 21802-1378
PO BOX 1379, SALISBURY, MD 21802-1379
PO BOX 1380, SALISBURY, MD 21802-1380
PO BOX 1381, SALISBURY, MD 21802-1381
PO BOX 1382, SALISBURY, MD 21802-1382
PO BOX 1383, SALISBURY, MD 21802-1383
PO BOX 1384, SALISBURY, MD 21802-1384
PO BOX 1385, SALISBURY, MD 21802-1385
PO BOX 1386, SALISBURY, MD 21802-1386
PO BOX 1387, SALISBURY, MD 21802-1387
PO BOX 1388, SALISBURY, MD 21802-1388
PO BOX 1389, SALISBURY, MD 21802-1389
PO BOX 1390, SALISBURY, MD 21802-1390
PO BOX 1391, SALISBURY, MD 21802-1391
PO BOX 1392, SALISBURY, MD 21802-1392
PO BOX 1393, SALISBURY, MD 21802-1393
PO BOX 1394, SALISBURY, MD 21802-1394
PO BOX 1395, SALISBURY, MD 21802-1395
PO BOX 1396, SALISBURY, MD 21802-1396
PO BOX 1397, SALISBURY, MD 21802-1397
PO BOX 1398, SALISBURY, MD 21802-1398
PO BOX 1399, SALISBURY, MD 21802-1399
PO BOX 1400, SALISBURY, MD 21802-1400
PO BOX 1401, SALISBURY, MD 21802-1401
PO BOX 1402, SALISBURY, MD 21802-1402
PO BOX 1403, SALISBURY, MD 21802-1403
PO BOX 1404, SALISBURY, MD 21802-1404
PO BOX 1405, SALISBURY, MD 21802-1405
PO BOX 1406, SALISBURY, MD 21802-1406
PO BOX 1407, SALISBURY, MD 21802-1407
PO BOX 1408, SALISBURY, MD 21802-1408
PO BOX 1409, SALISBURY, MD 21802-1409
PO BOX 1410, SALISBURY, MD 21802-1410
PO BOX 1411, SALISBURY, MD 21802-1411
PO BOX 1412, SALISBURY, MD 21802-1412
PO BOX 1413, SALISBURY, MD 21802-1413
PO BOX 1414, SALISBURY, MD 21802-1414
PO BOX 1415, SALISBURY, MD 21802-1415
PO BOX 1416, SALISBURY, MD 21802-1416
PO BOX 1417, SALISBURY, MD 21802-1417
PO BOX 1418, SALISBURY, MD 21802-1418
PO BOX 1419, SALISBURY, MD 21802-1419
PO BOX 1420, SALISBURY, MD 21802-1420
PO BOX 1421, SALISBURY, MD 21802-1421
PO BOX 1422, SALISBURY, MD 21802-1422
PO BOX 1423, SALISBURY, MD 21802-1423
PO BOX 1424, SALISBURY, MD 21802-1424
PO BOX 1425, SALISBURY, MD 21802-1425
PO BOX 1426, SALISBURY, MD 21802-1426
PO BOX 1427, SALISBURY, MD 21802-1427
PO BOX 1428, SALISBURY, MD 21802-1428
PO BOX 1429, SALISBURY, MD 21802-1429
PO BOX 1430, SALISBURY, MD 21802-1430
PO BOX 1431, SALISBURY, MD 21802-1431
PO BOX 1432, SALISBURY, MD 21802-1432
PO BOX 1433, SALISBURY, MD 21802-1433
PO BOX 1434, SALISBURY, MD 21802-1434
PO BOX 1435, SALISBURY, MD 21802-1435
PO BOX 1436, SALISBURY, MD 21802-1436
PO BOX 1437, SALISBURY, MD 21802-1437
PO BOX 1438, SALISBURY, MD 21802-1438
PO BOX 1439, SALISBURY, MD 21802-1439
PO BOX 1440, SALISBURY, MD 21802-1440
PO BOX 1441, SALISBURY, MD 21802-1441
PO BOX 1442, SALISBURY, MD 21802-1442
PO BOX 1443, SALISBURY, MD 21802-1443
PO BOX 1444, SALISBURY, MD 21802-1444
PO BOX 1445, SALISBURY, MD 21802-1445
PO BOX 1446, SALISBURY, MD 21802-1446
PO BOX 1447, SALISBURY, MD 21802-1447
PO BOX 1448, SALISBURY, MD 21802-1448
PO BOX 1449, SALISBURY, MD 21802-1449
PO BOX 1450, SALISBURY, MD 21802-1450
PO BOX 1451, SALISBURY, MD 21802-1451
PO BOX 1452, SALISBURY, MD 21802-1452
PO BOX 1453, SALISBURY, MD 21802-1453
PO BOX 1454, SALISBURY, MD 21802-1454
PO BOX 1455, SALISBURY, MD 21802-1455
PO BOX 1456, SALISBURY, MD 21802-1456
PO BOX 1457, SALISBURY, MD 21802-1457
PO BOX 1458, SALISBURY, MD 21802-1458
PO BOX 1459, SALISBURY, MD 21802-1459
PO BOX 1460, SALISBURY, MD 21802-1460
PO BOX 1461, SALISBURY, MD 21802-1461
PO BOX 1462, SALISBURY, MD 21802-1462
PO BOX 1463, SALISBURY, MD 21802-1463
PO BOX 1464, SALISBURY, MD 21802-1464
PO BOX 1465, SALISBURY, MD 21802-1465
PO BOX 1466, SALISBURY, MD 21802-1466
PO BOX 1467, SALISBURY, MD 21802-1467
PO BOX 1468, SALISBURY, MD 21802-1468
PO BOX 1469, SALISBURY, MD 21802-1469
PO BOX 1470, SALISBURY, MD 21802-1470
PO BOX 1471, SALISBURY, MD 21802-1471
PO BOX 1472, SALISBURY, MD 21802-1472
PO BOX 1473, SALISBURY, MD 21802-1473
PO BOX 1474, SALISBURY, MD 21802-1474
PO BOX 1475, SALISBURY, MD 21802-1475
PO BOX 1476, SALISBURY, MD 21802-1476
PO BOX 1477, SALISBURY, MD 21802-1477
PO BOX 1478, SALISBURY, MD 21802-1478
PO BOX 1479, SALISBURY, MD 21802-1479
PO BOX 1480, SALISBURY, MD 21802-1480
PO BOX 1481, SALISBURY, MD 21802-1481
PO BOX 1482, SALISBURY, MD 21802-1482
PO BOX 1483, SALISBURY, MD 21802-1483
PO BOX 1484, SALISBURY, MD 21802-1484
PO BOX 1485, SALISBURY, MD 21802-1485
PO BOX 1486, SALISBURY, MD 21802-1486
PO BOX 1487, SALISBURY, MD 21802-1487
PO BOX 1488, SALISBURY, MD 21802-1488
PO BOX 1489, SALISBURY, MD 21802-1489
PO BOX 1490, SALISBURY, MD 21802-1490
PO BOX 1491, SALISBURY, MD 21802-1491
PO BOX 1492, SALISBURY, MD 21802-1492
PO BOX 1493, SALISBURY, MD 21802-1493
PO BOX 1494, SALISBURY, MD 21802-1494
PO BOX 1495, SALISBURY, MD 21802-1495
PO BOX 1496, SALISBURY, MD 21802-1496
PO BOX 1497, SALISBURY, MD 21802-1497
PO BOX 1498, SALISBURY, MD 21802-1498
PO BOX 1499, SALISBURY, MD 21802-1499
PO BOX 1500, SALISBURY, MD 21802-1500
PO BOX 1501, SALISBURY, MD 21802-1501
PO BOX 1502, SALISBURY, MD 21802-1502
PO BOX 1503, SALISBURY, MD 21802-1503
PO BOX 1504, SALISBURY, MD 21802-1504
PO BOX 1505, SALISBURY, MD 21802-1505
PO BOX 1506, SALISBURY, MD 21802-1506
PO BOX 1507, SALISBURY, MD 21802-1507
PO BOX 1508, SALISBURY, MD 21802-1508
PO BOX 1509, SALISBURY, MD 21802-1509
PO BOX 1510, SALISBURY, MD 21802-1510
PO BOX 1511, SALISBURY, MD 21802-1511
PO BOX 1512, SALISBURY, MD 21802-1512
PO BOX 1513, SALISBURY, MD 21802-1513
PO BOX 1514, SALISBURY, MD 21802-1514
PO BOX 1515, SALISBURY, MD 21802-1515
PO BOX 1516, SALISBURY, MD 21802-1516
PO BOX 1517, SALISBURY, MD 21802-1517
PO BOX 1518, SALISBURY, MD 21802-1518
PO BOX 1519, SALISBURY, MD 21802-1519
PO BOX 1520, SALISBURY, MD 21802-1520
PO BOX 1521, SALISBURY, MD 21802-1521
PO BOX 1522, SALISBURY, MD 21802-1522
PO BOX 1523, SALISBURY, MD 21802-1523
PO BOX 1524, SALISBURY, MD 21802-1524
PO BOX 1525, SALISBURY, MD 21802-1525
PO BOX 1526, SALISBURY, MD 21802-1526
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