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 1451, BISMARCK, ND 58502-1451
PO BOX 1452, BISMARCK, ND 58502-1452
PO BOX 1453, BISMARCK, ND 58502-1453
PO BOX 1454, BISMARCK, ND 58502-1454
PO BOX 1455, BISMARCK, ND 58502-1455
PO BOX 1456, BISMARCK, ND 58502-1456
PO BOX 1457, BISMARCK, ND 58502-1457
PO BOX 1458, BISMARCK, ND 58502-1458
PO BOX 1459, BISMARCK, ND 58502-1459
PO BOX 1460, BISMARCK, ND 58502-1460
PO BOX 1461, BISMARCK, ND 58502-1461
PO BOX 1462, BISMARCK, ND 58502-1462
PO BOX 1463, BISMARCK, ND 58502-1463
PO BOX 1464, BISMARCK, ND 58502-1464
PO BOX 1465, BISMARCK, ND 58502-1465
PO BOX 1466, BISMARCK, ND 58502-1466
PO BOX 1467, BISMARCK, ND 58502-1467
PO BOX 1468, BISMARCK, ND 58502-1468
PO BOX 1469, BISMARCK, ND 58502-1469
PO BOX 1470, BISMARCK, ND 58502-1470
PO BOX 1471, BISMARCK, ND 58502-1471
PO BOX 1472, BISMARCK, ND 58502-1472
PO BOX 1473, BISMARCK, ND 58502-1473
PO BOX 1474, BISMARCK, ND 58502-1474
PO BOX 1475, BISMARCK, ND 58502-1475
PO BOX 1476, BISMARCK, ND 58502-1476
PO BOX 1477, BISMARCK, ND 58502-1477
PO BOX 1478, BISMARCK, ND 58502-1478
PO BOX 1479, BISMARCK, ND 58502-1479
PO BOX 1480, BISMARCK, ND 58502-1480
PO BOX 1481, BISMARCK, ND 58502-1481
PO BOX 1482, BISMARCK, ND 58502-1482
PO BOX 1483, BISMARCK, ND 58502-1483
PO BOX 1484, BISMARCK, ND 58502-1484
PO BOX 1485, BISMARCK, ND 58502-1485
PO BOX 1486, BISMARCK, ND 58502-1486
PO BOX 1487, BISMARCK, ND 58502-1487
PO BOX 1488, BISMARCK, ND 58502-1488
PO BOX 1489, BISMARCK, ND 58502-1489
PO BOX 1490, BISMARCK, ND 58502-1490
PO BOX 1491, BISMARCK, ND 58502-1491
PO BOX 1492, BISMARCK, ND 58502-1492
PO BOX 1493, BISMARCK, ND 58502-1493
PO BOX 1494, BISMARCK, ND 58502-1494
PO BOX 1495, BISMARCK, ND 58502-1495
PO BOX 1496, BISMARCK, ND 58502-1496
PO BOX 1497, BISMARCK, ND 58502-1497
PO BOX 1498, BISMARCK, ND 58502-1498
PO BOX 1499, BISMARCK, ND 58502-1499
PO BOX 1500, BISMARCK, ND 58502-1500
PO BOX 1501, BISMARCK, ND 58502-1501
PO BOX 1502, BISMARCK, ND 58502-1502
PO BOX 1503, BISMARCK, ND 58502-1503
PO BOX 1504, BISMARCK, ND 58502-1504
PO BOX 1505, BISMARCK, ND 58502-1505
PO BOX 1506, BISMARCK, ND 58502-1506
PO BOX 1507, BISMARCK, ND 58502-1507
PO BOX 1508, BISMARCK, ND 58502-1508
PO BOX 1509, BISMARCK, ND 58502-1509
PO BOX 1510, BISMARCK, ND 58502-1510
PO BOX 1511, BISMARCK, ND 58502-1511
PO BOX 1512, BISMARCK, ND 58502-1512
PO BOX 1513, BISMARCK, ND 58502-1513
PO BOX 1514, BISMARCK, ND 58502-1514
PO BOX 1515, BISMARCK, ND 58502-1515
PO BOX 1516, BISMARCK, ND 58502-1516
PO BOX 1517, BISMARCK, ND 58502-1517
PO BOX 1518, BISMARCK, ND 58502-1518
PO BOX 1519, BISMARCK, ND 58502-1519
PO BOX 1520, BISMARCK, ND 58502-1520
PO BOX 1521, BISMARCK, ND 58502-1521
PO BOX 1522, BISMARCK, ND 58502-1522
PO BOX 1523, BISMARCK, ND 58502-1523
PO BOX 1524, BISMARCK, ND 58502-1524
PO BOX 1525, BISMARCK, ND 58502-1525
PO BOX 1526, BISMARCK, ND 58502-1526
PO BOX 1527, BISMARCK, ND 58502-1527
PO BOX 1528, BISMARCK, ND 58502-1528
PO BOX 1529, BISMARCK, ND 58502-1529
PO BOX 1530, BISMARCK, ND 58502-1530
PO BOX 1531, BISMARCK, ND 58502-1531
PO BOX 1532, BISMARCK, ND 58502-1532
PO BOX 1533, BISMARCK, ND 58502-1533
PO BOX 1534, BISMARCK, ND 58502-1534
PO BOX 1535, BISMARCK, ND 58502-1535
PO BOX 1536, BISMARCK, ND 58502-1536
PO BOX 1537, BISMARCK, ND 58502-1537
PO BOX 1538, BISMARCK, ND 58502-1538
PO BOX 1539, BISMARCK, ND 58502-1539
PO BOX 1540, BISMARCK, ND 58502-1540
PO BOX 1541, BISMARCK, ND 58502-1541
PO BOX 1542, BISMARCK, ND 58502-1542
PO BOX 1543, BISMARCK, ND 58502-1543
PO BOX 1544, BISMARCK, ND 58502-1544
PO BOX 1545, BISMARCK, ND 58502-1545
PO BOX 1546, BISMARCK, ND 58502-1546
PO BOX 1547, BISMARCK, ND 58502-1547
PO BOX 1548, BISMARCK, ND 58502-1548
PO BOX 1549, BISMARCK, ND 58502-1549
PO BOX 1550, BISMARCK, ND 58502-1550
PO BOX 1551, BISMARCK, ND 58502-1551
PO BOX 1552, BISMARCK, ND 58502-1552
PO BOX 1553, BISMARCK, ND 58502-1553
PO BOX 1554, BISMARCK, ND 58502-1554
PO BOX 1555, BISMARCK, ND 58502-1555
PO BOX 1556, BISMARCK, ND 58502-1556
PO BOX 1557, BISMARCK, ND 58502-1557
PO BOX 1558, BISMARCK, ND 58502-1558
PO BOX 1559, BISMARCK, ND 58502-1559
PO BOX 1560, BISMARCK, ND 58502-1560
PO BOX 1561, BISMARCK, ND 58502-1561
PO BOX 1562, BISMARCK, ND 58502-1562
PO BOX 1563, BISMARCK, ND 58502-1563
PO BOX 1564, BISMARCK, ND 58502-1564
PO BOX 1565, BISMARCK, ND 58502-1565
PO BOX 1566, BISMARCK, ND 58502-1566
PO BOX 1567, BISMARCK, ND 58502-1567
PO BOX 1568, BISMARCK, ND 58502-1568
PO BOX 1569, BISMARCK, ND 58502-1569
PO BOX 1570, BISMARCK, ND 58502-1570
PO BOX 1571, BISMARCK, ND 58502-1571
PO BOX 1572, BISMARCK, ND 58502-1572
PO BOX 1573, BISMARCK, ND 58502-1573
PO BOX 1574, BISMARCK, ND 58502-1574
PO BOX 1575, BISMARCK, ND 58502-1575
PO BOX 1576, BISMARCK, ND 58502-1576
PO BOX 1577, BISMARCK, ND 58502-1577
PO BOX 1578, BISMARCK, ND 58502-1578
PO BOX 1579, BISMARCK, ND 58502-1579
PO BOX 1580, BISMARCK, ND 58502-1580
PO BOX 1581, BISMARCK, ND 58502-1581
PO BOX 1582, BISMARCK, ND 58502-1582
PO BOX 1583, BISMARCK, ND 58502-1583
PO BOX 1584, BISMARCK, ND 58502-1584
PO BOX 1585, BISMARCK, ND 58502-1585
PO BOX 1586, BISMARCK, ND 58502-1586
PO BOX 1587, BISMARCK, ND 58502-1587
PO BOX 1588, BISMARCK, ND 58502-1588
PO BOX 1589, BISMARCK, ND 58502-1589
PO BOX 1590, BISMARCK, ND 58502-1590
PO BOX 1591, BISMARCK, ND 58502-1591
PO BOX 1592, BISMARCK, ND 58502-1592
PO BOX 1593, BISMARCK, ND 58502-1593
PO BOX 1594, BISMARCK, ND 58502-1594
PO BOX 1595, BISMARCK, ND 58502-1595
PO BOX 1596, BISMARCK, ND 58502-1596
PO BOX 1597, BISMARCK, ND 58502-1597
PO BOX 1598, BISMARCK, ND 58502-1598
PO BOX 1599, BISMARCK, ND 58502-1599
PO BOX 1600, BISMARCK, ND 58502-1600
PO BOX 1601, BISMARCK, ND 58502-1601
PO BOX 1602, BISMARCK, ND 58502-1602
PO BOX 1603, BISMARCK, ND 58502-1603
PO BOX 1604, BISMARCK, ND 58502-1604
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