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 1501, COLUMBIA, MS 39429-1501
PO BOX 1502, COLUMBIA, MS 39429-1502
PO BOX 1503, COLUMBIA, MS 39429-1503
PO BOX 1504, COLUMBIA, MS 39429-1504
PO BOX 1505, COLUMBIA, MS 39429-1505
PO BOX 1506, COLUMBIA, MS 39429-1506
PO BOX 1507, COLUMBIA, MS 39429-1507
PO BOX 1508, COLUMBIA, MS 39429-1508
PO BOX 1509, COLUMBIA, MS 39429-1509
PO BOX 1510, COLUMBIA, MS 39429-1510
PO BOX 1511, COLUMBIA, MS 39429-1511
PO BOX 1512, COLUMBIA, MS 39429-1512
PO BOX 1513, COLUMBIA, MS 39429-1513
PO BOX 1514, COLUMBIA, MS 39429-1514
PO BOX 1515, COLUMBIA, MS 39429-1515
PO BOX 1516, COLUMBIA, MS 39429-1516
PO BOX 1517, COLUMBIA, MS 39429-1517
PO BOX 1518, COLUMBIA, MS 39429-1518
PO BOX 1519, COLUMBIA, MS 39429-1519
PO BOX 1520, COLUMBIA, MS 39429-1520
PO BOX 1521, COLUMBIA, MS 39429-1521
PO BOX 1522, COLUMBIA, MS 39429-1522
PO BOX 1523, COLUMBIA, MS 39429-1523
PO BOX 1524, COLUMBIA, MS 39429-1524
PO BOX 1525, COLUMBIA, MS 39429-1525
PO BOX 1526, COLUMBIA, MS 39429-1526
PO BOX 1527, COLUMBIA, MS 39429-1527
PO BOX 1528, COLUMBIA, MS 39429-1528
PO BOX 1529, COLUMBIA, MS 39429-1529
PO BOX 1530, COLUMBIA, MS 39429-1530
PO BOX 1531, COLUMBIA, MS 39429-1531
PO BOX 1532, COLUMBIA, MS 39429-1532
PO BOX 1533, COLUMBIA, MS 39429-1533
PO BOX 1534, COLUMBIA, MS 39429-1534
PO BOX 1535, COLUMBIA, MS 39429-1535
PO BOX 1536, COLUMBIA, MS 39429-1536
PO BOX 1537, COLUMBIA, MS 39429-1537
PO BOX 1538, COLUMBIA, MS 39429-1538
PO BOX 1539, COLUMBIA, MS 39429-1539
PO BOX 1540, COLUMBIA, MS 39429-1540
PO BOX 1541, COLUMBIA, MS 39429-1541
PO BOX 1542, COLUMBIA, MS 39429-1542
PO BOX 1543, COLUMBIA, MS 39429-1543
PO BOX 1544, COLUMBIA, MS 39429-1544
PO BOX 1545, COLUMBIA, MS 39429-1545
PO BOX 1546, COLUMBIA, MS 39429-1546
PO BOX 1547, COLUMBIA, MS 39429-1547
PO BOX 1548, COLUMBIA, MS 39429-1548
PO BOX 1549, COLUMBIA, MS 39429-1549
PO BOX 1550, COLUMBIA, MS 39429-1550
PO BOX 1551, COLUMBIA, MS 39429-1551
PO BOX 1552, COLUMBIA, MS 39429-1552
PO BOX 1553, COLUMBIA, MS 39429-1553
PO BOX 1554, COLUMBIA, MS 39429-1554
PO BOX 1555, COLUMBIA, MS 39429-1555
PO BOX 1556, COLUMBIA, MS 39429-1556
PO BOX 1557, COLUMBIA, MS 39429-1557
PO BOX 1558, COLUMBIA, MS 39429-1558
PO BOX 1559, COLUMBIA, MS 39429-1559
PO BOX 1560, COLUMBIA, MS 39429-1560
PO BOX 1561, COLUMBIA, MS 39429-1561
PO BOX 1562, COLUMBIA, MS 39429-1562
PO BOX 1563, COLUMBIA, MS 39429-1563
PO BOX 1564, COLUMBIA, MS 39429-1564
PO BOX 1565, COLUMBIA, MS 39429-1565
PO BOX 1566, COLUMBIA, MS 39429-1566
PO BOX 1567, COLUMBIA, MS 39429-1567
PO BOX 1568, COLUMBIA, MS 39429-1568
PO BOX 1569, COLUMBIA, MS 39429-1569
PO BOX 1570, COLUMBIA, MS 39429-1570
PO BOX 1571, COLUMBIA, MS 39429-1571
PO BOX 1572, COLUMBIA, MS 39429-1572
PO BOX 1573, COLUMBIA, MS 39429-1573
PO BOX 1574, COLUMBIA, MS 39429-1574
PO BOX 1575, COLUMBIA, MS 39429-1575
PO BOX 1576, COLUMBIA, MS 39429-1576
PO BOX 1577, COLUMBIA, MS 39429-1577
PO BOX 1578, COLUMBIA, MS 39429-1578
PO BOX 1579, COLUMBIA, MS 39429-1579
PO BOX 1580, COLUMBIA, MS 39429-1580
PO BOX 1581, COLUMBIA, MS 39429-1581
PO BOX 1582, COLUMBIA, MS 39429-1582
PO BOX 1583, COLUMBIA, MS 39429-1583
PO BOX 1584, COLUMBIA, MS 39429-1584
PO BOX 1585, COLUMBIA, MS 39429-1585
PO BOX 1586, COLUMBIA, MS 39429-1586
PO BOX 1587, COLUMBIA, MS 39429-1587
PO BOX 1588, COLUMBIA, MS 39429-1588
PO BOX 1589, COLUMBIA, MS 39429-1589
PO BOX 1590, COLUMBIA, MS 39429-1590
PO BOX 1591, COLUMBIA, MS 39429-1591
PO BOX 1592, COLUMBIA, MS 39429-1592
PO BOX 1593, COLUMBIA, MS 39429-1593
PO BOX 1594, COLUMBIA, MS 39429-1594
PO BOX 1595, COLUMBIA, MS 39429-1595
PO BOX 1596, COLUMBIA, MS 39429-1596
PO BOX 1597, COLUMBIA, MS 39429-1597
PO BOX 1598, COLUMBIA, MS 39429-1598
PO BOX 1599, COLUMBIA, MS 39429-1599
PO BOX 1600, COLUMBIA, MS 39429-1600
PO BOX 1601, COLUMBIA, MS 39429-1601
PO BOX 1602, COLUMBIA, MS 39429-1602
PO BOX 1603, COLUMBIA, MS 39429-1603
PO BOX 1604, COLUMBIA, MS 39429-1604
PO BOX 1605, COLUMBIA, MS 39429-1605
PO BOX 1606, COLUMBIA, MS 39429-1606
PO BOX 1607, COLUMBIA, MS 39429-1607
PO BOX 1608, COLUMBIA, MS 39429-1608
PO BOX 1609, COLUMBIA, MS 39429-1609
PO BOX 1610, COLUMBIA, MS 39429-1610
PO BOX 1611, COLUMBIA, MS 39429-1611
PO BOX 1612, COLUMBIA, MS 39429-1612
PO BOX 1613, COLUMBIA, MS 39429-1613
PO BOX 1614, COLUMBIA, MS 39429-1614
PO BOX 1615, COLUMBIA, MS 39429-1615
PO BOX 1616, COLUMBIA, MS 39429-1616
PO BOX 1617, COLUMBIA, MS 39429-1617
PO BOX 1618, COLUMBIA, MS 39429-1618
PO BOX 1619, COLUMBIA, MS 39429-1619
PO BOX 1620, COLUMBIA, MS 39429-1620
PO BOX 1621, COLUMBIA, MS 39429-1621
PO BOX 1622, COLUMBIA, MS 39429-1622
PO BOX 1623, COLUMBIA, MS 39429-1623
PO BOX 1624, COLUMBIA, MS 39429-1624
PO BOX 1625, COLUMBIA, MS 39429-1625
PO BOX 1626, COLUMBIA, MS 39429-1626
PO BOX 1627, COLUMBIA, MS 39429-1627
PO BOX 1628, COLUMBIA, MS 39429-1628
PO BOX 1629, COLUMBIA, MS 39429-1629
PO BOX 1630, COLUMBIA, MS 39429-1630
PO BOX 1631, COLUMBIA, MS 39429-1631
PO BOX 1632, COLUMBIA, MS 39429-1632
PO BOX 1633, COLUMBIA, MS 39429-1633
PO BOX 1634, COLUMBIA, MS 39429-1634
PO BOX 1635, COLUMBIA, MS 39429-1635
PO BOX 1636, COLUMBIA, MS 39429-1636
PO BOX 1637, COLUMBIA, MS 39429-1637
PO BOX 1638, COLUMBIA, MS 39429-1638
PO BOX 1639, COLUMBIA, MS 39429-1639
PO BOX 1640, COLUMBIA, MS 39429-1640
PO BOX 1641, COLUMBIA, MS 39429-1641
PO BOX 1642, COLUMBIA, MS 39429-1642
PO BOX 1643, COLUMBIA, MS 39429-1643
PO BOX 1644, COLUMBIA, MS 39429-1644
PO BOX 1645, COLUMBIA, MS 39429-1645
PO BOX 1646, COLUMBIA, MS 39429-1646
PO BOX 1647, COLUMBIA, MS 39429-1647
PO BOX 1648, COLUMBIA, MS 39429-1648
PO BOX 1649, COLUMBIA, MS 39429-1649
PO BOX 1650, COLUMBIA, MS 39429-1650
PO BOX 1651, COLUMBIA, MS 39429-1651
PO BOX 1652, COLUMBIA, MS 39429-1652
PO BOX 1653, COLUMBIA, MS 39429-1653
PO BOX 1654, COLUMBIA, MS 39429-1654
PO BOX 1655, COLUMBIA, MS 39429-1655
PO BOX 1656, COLUMBIA, MS 39429-1656
PO BOX 1657, COLUMBIA, MS 39429-1657
PO BOX 1658, COLUMBIA, MS 39429-1658
PO BOX 1659, COLUMBIA, MS 39429-1659
PO BOX 1660, COLUMBIA, MS 39429-1660
PO BOX 1661, COLUMBIA, MS 39429-1661
PO BOX 1662, COLUMBIA, MS 39429-1662
PO BOX 1663, COLUMBIA, MS 39429-1663
PO BOX 1664, COLUMBIA, MS 39429-1664
PO BOX 1665, COLUMBIA, MS 39429-1665
PO BOX 1666, COLUMBIA, MS 39429-1666
PO BOX 1667, COLUMBIA, MS 39429-1667
PO BOX 1668, COLUMBIA, MS 39429-1668
PO BOX 1669, COLUMBIA, MS 39429-1669
PO BOX 1670, COLUMBIA, MS 39429-1670
PO BOX 1671, COLUMBIA, MS 39429-1671
PO BOX 1672, COLUMBIA, MS 39429-1672
PO BOX 1673, COLUMBIA, MS 39429-1673
PO BOX 1674, COLUMBIA, MS 39429-1674
PO BOX 1675, COLUMBIA, MS 39429-1675
PO BOX 1676, COLUMBIA, MS 39429-1676
PO BOX 1677, COLUMBIA, MS 39429-1677
PO BOX 1678, COLUMBIA, MS 39429-1678
PO BOX 1679, COLUMBIA, MS 39429-1679
PO BOX 1680, COLUMBIA, MS 39429-1680
PO BOX 1681, COLUMBIA, MS 39429-1681
PO BOX 1682, COLUMBIA, MS 39429-1682
PO BOX 1683, COLUMBIA, MS 39429-1683
PO BOX 1684, COLUMBIA, MS 39429-1684
PO BOX 1685, COLUMBIA, MS 39429-1685
PO BOX 1686, COLUMBIA, MS 39429-1686
PO BOX 1687, COLUMBIA, MS 39429-1687
PO BOX 1688, COLUMBIA, MS 39429-1688
PO BOX 1689, COLUMBIA, MS 39429-1689
PO BOX 1690, COLUMBIA, MS 39429-1690
PO BOX 1691, COLUMBIA, MS 39429-1691
PO BOX 1692, COLUMBIA, MS 39429-1692
PO BOX 1693, COLUMBIA, MS 39429-1693
PO BOX 1694, COLUMBIA, MS 39429-1694
PO BOX 1695, COLUMBIA, MS 39429-1695
PO BOX 1696, COLUMBIA, MS 39429-1696
PO BOX 1697, COLUMBIA, MS 39429-1697
PO BOX 1698, COLUMBIA, MS 39429-1698
PO BOX 1699, COLUMBIA, MS 39429-1699
PO BOX 1700, COLUMBIA, MS 39429-1700
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