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 1381, POWAY, CA 92074-1381
PO BOX 1382, POWAY, CA 92074-1382
PO BOX 1383, POWAY, CA 92074-1383
PO BOX 1384, POWAY, CA 92074-1384
PO BOX 1385, POWAY, CA 92074-1385
PO BOX 1386, POWAY, CA 92074-1386
PO BOX 1387, POWAY, CA 92074-1387
PO BOX 1388, POWAY, CA 92074-1388
PO BOX 1389, POWAY, CA 92074-1389
PO BOX 1390, POWAY, CA 92074-1390
PO BOX 1391, POWAY, CA 92074-1391
PO BOX 1392, POWAY, CA 92074-1392
PO BOX 1393, POWAY, CA 92074-1393
PO BOX 1394, POWAY, CA 92074-1394
PO BOX 1395, POWAY, CA 92074-1395
PO BOX 1396, POWAY, CA 92074-1396
PO BOX 1397, POWAY, CA 92074-1397
PO BOX 1398, POWAY, CA 92074-1398
PO BOX 1399, POWAY, CA 92074-1399
PO BOX 1400, POWAY, CA 92074-1400
PO BOX 1401, POWAY, CA 92074-1401
PO BOX 1402, POWAY, CA 92074-1402
PO BOX 1403, POWAY, CA 92074-1403
PO BOX 1404, POWAY, CA 92074-1404
PO BOX 1405, POWAY, CA 92074-1405
PO BOX 1406, POWAY, CA 92074-1406
PO BOX 1407, POWAY, CA 92074-1407
PO BOX 1408, POWAY, CA 92074-1408
PO BOX 1409, POWAY, CA 92074-1409
PO BOX 1410, POWAY, CA 92074-1410
PO BOX 1411, POWAY, CA 92074-1411
PO BOX 1412, POWAY, CA 92074-1412
PO BOX 1413, POWAY, CA 92074-1413
PO BOX 1414, POWAY, CA 92074-1414
PO BOX 1415, POWAY, CA 92074-1415
PO BOX 1416, POWAY, CA 92074-1416
PO BOX 1417, POWAY, CA 92074-1417
PO BOX 1418, POWAY, CA 92074-1418
PO BOX 1419, POWAY, CA 92074-1419
PO BOX 1420, POWAY, CA 92074-1420
PO BOX 1421, POWAY, CA 92074-1421
PO BOX 1422, POWAY, CA 92074-1422
PO BOX 1423, POWAY, CA 92074-1423
PO BOX 1424, POWAY, CA 92074-1424
PO BOX 1425, POWAY, CA 92074-1425
PO BOX 1426, POWAY, CA 92074-1426
PO BOX 1427, POWAY, CA 92074-1427
PO BOX 1428, POWAY, CA 92074-1428
PO BOX 1429, POWAY, CA 92074-1429
PO BOX 1430, POWAY, CA 92074-1430
PO BOX 1431, POWAY, CA 92074-1431
PO BOX 1432, POWAY, CA 92074-1432
PO BOX 1433, POWAY, CA 92074-1433
PO BOX 1434, POWAY, CA 92074-1434
PO BOX 1435, POWAY, CA 92074-1435
PO BOX 1436, POWAY, CA 92074-1436
PO BOX 1437, POWAY, CA 92074-1437
PO BOX 1438, POWAY, CA 92074-1438
PO BOX 1439, POWAY, CA 92074-1439
PO BOX 1440, POWAY, CA 92074-1440
PO BOX 1441, POWAY, CA 92074-1441
PO BOX 1442, POWAY, CA 92074-1442
PO BOX 1443, POWAY, CA 92074-1443
PO BOX 1444, POWAY, CA 92074-1444
PO BOX 1445, POWAY, CA 92074-1445
PO BOX 1446, POWAY, CA 92074-1446
PO BOX 1447, POWAY, CA 92074-1447
PO BOX 1448, POWAY, CA 92074-1448
PO BOX 1449, POWAY, CA 92074-1449
PO BOX 1450, POWAY, CA 92074-1450
PO BOX 1451, POWAY, CA 92074-1451
PO BOX 1452, POWAY, CA 92074-1452
PO BOX 1453, POWAY, CA 92074-1453
PO BOX 1454, POWAY, CA 92074-1454
PO BOX 1455, POWAY, CA 92074-1455
PO BOX 1456, POWAY, CA 92074-1456
PO BOX 1457, POWAY, CA 92074-1457
PO BOX 1458, POWAY, CA 92074-1458
PO BOX 1459, POWAY, CA 92074-1459
PO BOX 1460, POWAY, CA 92074-1460
PO BOX 1461, POWAY, CA 92074-1461
PO BOX 1462, POWAY, CA 92074-1462
PO BOX 1463, POWAY, CA 92074-1463
PO BOX 1464, POWAY, CA 92074-1464
PO BOX 1465, POWAY, CA 92074-1465
PO BOX 1466, POWAY, CA 92074-1466
PO BOX 1467, POWAY, CA 92074-1467
PO BOX 1468, POWAY, CA 92074-1468
PO BOX 1469, POWAY, CA 92074-1469
PO BOX 1470, POWAY, CA 92074-1470
PO BOX 1471, POWAY, CA 92074-1471
PO BOX 1472, POWAY, CA 92074-1472
PO BOX 1473, POWAY, CA 92074-1473
PO BOX 1474, POWAY, CA 92074-1474
PO BOX 1475, POWAY, CA 92074-1475
PO BOX 1476, POWAY, CA 92074-1476
PO BOX 1477, POWAY, CA 92074-1477
PO BOX 1478, POWAY, CA 92074-1478
PO BOX 1479, POWAY, CA 92074-1479
PO BOX 1480, POWAY, CA 92074-1480
PO BOX 1481, POWAY, CA 92074-1481
PO BOX 1482, POWAY, CA 92074-1482
PO BOX 1483, POWAY, CA 92074-1483
PO BOX 1484, POWAY, CA 92074-1484
PO BOX 1485, POWAY, CA 92074-1485
PO BOX 1486, POWAY, CA 92074-1486
PO BOX 1487, POWAY, CA 92074-1487
PO BOX 1488, POWAY, CA 92074-1488
PO BOX 1489, POWAY, CA 92074-1489
PO BOX 1490, POWAY, CA 92074-1490
PO BOX 1491, POWAY, CA 92074-1491
PO BOX 1492, POWAY, CA 92074-1492
PO BOX 1493, POWAY, CA 92074-1493
PO BOX 1494, POWAY, CA 92074-1494
PO BOX 1495, POWAY, CA 92074-1495
PO BOX 1496, POWAY, CA 92074-1496
PO BOX 1497, POWAY, CA 92074-1497
PO BOX 1498, POWAY, CA 92074-1498
PO BOX 1499, POWAY, CA 92074-1499
PO BOX 1500, POWAY, CA 92074-1500
PO BOX 1501, POWAY, CA 92074-1501
PO BOX 1502, POWAY, CA 92074-1502
PO BOX 1503, POWAY, CA 92074-1503
PO BOX 1504, POWAY, CA 92074-1504
PO BOX 1505, POWAY, CA 92074-1505
PO BOX 1506, POWAY, CA 92074-1506
PO BOX 1507, POWAY, CA 92074-1507
PO BOX 1508, POWAY, CA 92074-1508
PO BOX 1509, POWAY, CA 92074-1509
PO BOX 1510, POWAY, CA 92074-1510
PO BOX 1511, POWAY, CA 92074-1511
PO BOX 1512, POWAY, CA 92074-1512
PO BOX 1513, POWAY, CA 92074-1513
PO BOX 1514, POWAY, CA 92074-1514
PO BOX 1515, POWAY, CA 92074-1515
PO BOX 1516, POWAY, CA 92074-1516
PO BOX 1517, POWAY, CA 92074-1517
PO BOX 1518, POWAY, CA 92074-1518
PO BOX 1519, POWAY, CA 92074-1519
PO BOX 1520, POWAY, CA 92074-1520
PO BOX 1521, POWAY, CA 92074-1521
PO BOX 1522, POWAY, CA 92074-1522
PO BOX 1523, POWAY, CA 92074-1523
PO BOX 1524, POWAY, CA 92074-1524
PO BOX 1525, POWAY, CA 92074-1525
PO BOX 1526, POWAY, CA 92074-1526
PO BOX 1527, POWAY, CA 92074-1527
PO BOX 1528, POWAY, CA 92074-1528
PO BOX 1529, POWAY, CA 92074-1529
PO BOX 1530, POWAY, CA 92074-1530
PO BOX 1531, POWAY, CA 92074-1531
PO BOX 1532, POWAY, CA 92074-1532
PO BOX 1533, POWAY, CA 92074-1533
PO BOX 1534, POWAY, CA 92074-1534
PO BOX 1535, POWAY, CA 92074-1535
PO BOX 1536, POWAY, CA 92074-1536
PO BOX 1537, POWAY, CA 92074-1537
PO BOX 1538, POWAY, CA 92074-1538
PO BOX 1539, POWAY, CA 92074-1539
PO BOX 1540, POWAY, CA 92074-1540
PO BOX 1541, POWAY, CA 92074-1541
PO BOX 1542, POWAY, CA 92074-1542
PO BOX 1543, POWAY, CA 92074-1543
PO BOX 1544, POWAY, CA 92074-1544
PO BOX 1545, POWAY, CA 92074-1545
PO BOX 1546, POWAY, CA 92074-1546
PO BOX 1547, POWAY, CA 92074-1547
PO BOX 1548, POWAY, CA 92074-1548
PO BOX 1549, POWAY, CA 92074-1549
PO BOX 1550, POWAY, CA 92074-1550
PO BOX 1551, POWAY, CA 92074-1551
PO BOX 1552, POWAY, CA 92074-1552
PO BOX 1553, POWAY, CA 92074-1553
PO BOX 1554, POWAY, CA 92074-1554
PO BOX 1555, POWAY, CA 92074-1555
PO BOX 1556, POWAY, CA 92074-1556
PO BOX 1557, POWAY, CA 92074-1557
PO BOX 1558, POWAY, CA 92074-1558
PO BOX 1559, POWAY, CA 92074-1559
PO BOX 1560, POWAY, CA 92074-1560
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