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 1561, WILMINGTON, NC 28402-1561
PO BOX 1562, WILMINGTON, NC 28402-1562
PO BOX 1563, WILMINGTON, NC 28402-1563
PO BOX 1564, WILMINGTON, NC 28402-1564
PO BOX 1565, WILMINGTON, NC 28402-1565
PO BOX 1566, WILMINGTON, NC 28402-1566
PO BOX 1567, WILMINGTON, NC 28402-1567
PO BOX 1568, WILMINGTON, NC 28402-1568
PO BOX 1569, WILMINGTON, NC 28402-1569
PO BOX 1570, WILMINGTON, NC 28402-1570
PO BOX 1571, WILMINGTON, NC 28402-1571
PO BOX 1572, WILMINGTON, NC 28402-1572
PO BOX 1573, WILMINGTON, NC 28402-1573
PO BOX 1574, WILMINGTON, NC 28402-1574
PO BOX 1575, WILMINGTON, NC 28402-1575
PO BOX 1576, WILMINGTON, NC 28402-1576
PO BOX 1577, WILMINGTON, NC 28402-1577
PO BOX 1578, WILMINGTON, NC 28402-1578
PO BOX 1579, WILMINGTON, NC 28402-1579
PO BOX 1580, WILMINGTON, NC 28402-1580
PO BOX 1581, WILMINGTON, NC 28402-1581
PO BOX 1582, WILMINGTON, NC 28402-1582
PO BOX 1583, WILMINGTON, NC 28402-1583
PO BOX 1584, WILMINGTON, NC 28402-1584
PO BOX 1585, WILMINGTON, NC 28402-1585
PO BOX 1586, WILMINGTON, NC 28402-1586
PO BOX 1587, WILMINGTON, NC 28402-1587
PO BOX 1588, WILMINGTON, NC 28402-1588
PO BOX 1589, WILMINGTON, NC 28402-1589
PO BOX 1590, WILMINGTON, NC 28402-1590
PO BOX 1591, WILMINGTON, NC 28402-1591
PO BOX 1592, WILMINGTON, NC 28402-1592
PO BOX 1593, WILMINGTON, NC 28402-1593
PO BOX 1594, WILMINGTON, NC 28402-1594
PO BOX 1595, WILMINGTON, NC 28402-1595
PO BOX 1596, WILMINGTON, NC 28402-1596
PO BOX 1597, WILMINGTON, NC 28402-1597
PO BOX 1598, WILMINGTON, NC 28402-1598
PO BOX 1599, WILMINGTON, NC 28402-1599
PO BOX 1600, WILMINGTON, NC 28402-1600
PO BOX 1601, WILMINGTON, NC 28402-1601
PO BOX 1602, WILMINGTON, NC 28402-1602
PO BOX 1603, WILMINGTON, NC 28402-1603
PO BOX 1604, WILMINGTON, NC 28402-1604
PO BOX 1605, WILMINGTON, NC 28402-1605
PO BOX 1606, WILMINGTON, NC 28402-1606
PO BOX 1607, WILMINGTON, NC 28402-1607
PO BOX 1608, WILMINGTON, NC 28402-1608
PO BOX 1609, WILMINGTON, NC 28402-1609
PO BOX 1610, WILMINGTON, NC 28402-1610
PO BOX 1611, WILMINGTON, NC 28402-1611
PO BOX 1612, WILMINGTON, NC 28402-1612
PO BOX 1613, WILMINGTON, NC 28402-1613
PO BOX 1614, WILMINGTON, NC 28402-1614
PO BOX 1615, WILMINGTON, NC 28402-1615
PO BOX 1616, WILMINGTON, NC 28402-1616
PO BOX 1617, WILMINGTON, NC 28402-1617
PO BOX 1618, WILMINGTON, NC 28402-1618
PO BOX 1619, WILMINGTON, NC 28402-1619
PO BOX 1620, WILMINGTON, NC 28402-1620
PO BOX 1621, WILMINGTON, NC 28402-1621
PO BOX 1622, WILMINGTON, NC 28402-1622
PO BOX 1623, WILMINGTON, NC 28402-1623
PO BOX 1624, WILMINGTON, NC 28402-1624
PO BOX 1625, WILMINGTON, NC 28402-1625
PO BOX 1626, WILMINGTON, NC 28402-1626
PO BOX 1627, WILMINGTON, NC 28402-1627
PO BOX 1628, WILMINGTON, NC 28402-1628
PO BOX 1629, WILMINGTON, NC 28402-1629
PO BOX 1630, WILMINGTON, NC 28402-1630
PO BOX 1631, WILMINGTON, NC 28402-1631
PO BOX 1632, WILMINGTON, NC 28402-1632
PO BOX 1633, WILMINGTON, NC 28402-1633
PO BOX 1634, WILMINGTON, NC 28402-1634
PO BOX 1635, WILMINGTON, NC 28402-1635
PO BOX 1636, WILMINGTON, NC 28402-1636
PO BOX 1637, WILMINGTON, NC 28402-1637
PO BOX 1638, WILMINGTON, NC 28402-1638
PO BOX 1639, WILMINGTON, NC 28402-1639
PO BOX 1640, WILMINGTON, NC 28402-1640
PO BOX 1641, WILMINGTON, NC 28402-1641
PO BOX 1642, WILMINGTON, NC 28402-1642
PO BOX 1643, WILMINGTON, NC 28402-1643
PO BOX 1644, WILMINGTON, NC 28402-1644
PO BOX 1645, WILMINGTON, NC 28402-1645
PO BOX 1646, WILMINGTON, NC 28402-1646
PO BOX 1647, WILMINGTON, NC 28402-1647
PO BOX 1648, WILMINGTON, NC 28402-1648
PO BOX 1649, WILMINGTON, NC 28402-1649
PO BOX 1650, WILMINGTON, NC 28402-1650
PO BOX 1651, WILMINGTON, NC 28402-1651
PO BOX 1652, WILMINGTON, NC 28402-1652
PO BOX 1653, WILMINGTON, NC 28402-1653
PO BOX 1654, WILMINGTON, NC 28402-1654
PO BOX 1655, WILMINGTON, NC 28402-1655
PO BOX 1656, WILMINGTON, NC 28402-1656
PO BOX 1657, WILMINGTON, NC 28402-1657
PO BOX 1658, WILMINGTON, NC 28402-1658
PO BOX 1659, WILMINGTON, NC 28402-1659
PO BOX 1660, WILMINGTON, NC 28402-1660
PO BOX 1661, WILMINGTON, NC 28402-1661
PO BOX 1662, WILMINGTON, NC 28402-1662
PO BOX 1663, WILMINGTON, NC 28402-1663
PO BOX 1664, WILMINGTON, NC 28402-1664
PO BOX 1665, WILMINGTON, NC 28402-1665
PO BOX 1666, WILMINGTON, NC 28402-1666
PO BOX 1667, WILMINGTON, NC 28402-1667
PO BOX 1668, WILMINGTON, NC 28402-1668
PO BOX 1669, WILMINGTON, NC 28402-1669
PO BOX 1670, WILMINGTON, NC 28402-1670
PO BOX 1671, WILMINGTON, NC 28402-1671
PO BOX 1672, WILMINGTON, NC 28402-1672
PO BOX 1673, WILMINGTON, NC 28402-1673
PO BOX 1674, WILMINGTON, NC 28402-1674
PO BOX 1675, WILMINGTON, NC 28402-1675
PO BOX 1676, WILMINGTON, NC 28402-1676
PO BOX 1677, WILMINGTON, NC 28402-1677
PO BOX 1678, WILMINGTON, NC 28402-1678
PO BOX 1679, WILMINGTON, NC 28402-1679
PO BOX 1680, WILMINGTON, NC 28402-1680
PO BOX 1681, WILMINGTON, NC 28402-1681
PO BOX 1682, WILMINGTON, NC 28402-1682
PO BOX 1683, WILMINGTON, NC 28402-1683
PO BOX 1684, WILMINGTON, NC 28402-1684
PO BOX 1685, WILMINGTON, NC 28402-1685
PO BOX 1686, WILMINGTON, NC 28402-1686
PO BOX 1687, WILMINGTON, NC 28402-1687
PO BOX 1688, WILMINGTON, NC 28402-1688
PO BOX 1689, WILMINGTON, NC 28402-1689
PO BOX 1690, WILMINGTON, NC 28402-1690
PO BOX 1691, WILMINGTON, NC 28402-1691
PO BOX 1692, WILMINGTON, NC 28402-1692
PO BOX 1693, WILMINGTON, NC 28402-1693
PO BOX 1694, WILMINGTON, NC 28402-1694
PO BOX 1695, WILMINGTON, NC 28402-1695
PO BOX 1696, WILMINGTON, NC 28402-1696
PO BOX 1697, WILMINGTON, NC 28402-1697
PO BOX 1698, WILMINGTON, NC 28402-1698
PO BOX 1699, WILMINGTON, NC 28402-1699
PO BOX 1700, WILMINGTON, NC 28402-1700
PO BOX 1701, WILMINGTON, NC 28402-1701
PO BOX 1702, WILMINGTON, NC 28402-1702
PO BOX 1703, WILMINGTON, NC 28402-1703
PO BOX 1704, WILMINGTON, NC 28402-1704
PO BOX 1705, WILMINGTON, NC 28402-1705
PO BOX 1706, WILMINGTON, NC 28402-1706
PO BOX 1707, WILMINGTON, NC 28402-1707
PO BOX 1708, WILMINGTON, NC 28402-1708
PO BOX 1709, WILMINGTON, NC 28402-1709
PO BOX 1710, WILMINGTON, NC 28402-1710
PO BOX 1711, WILMINGTON, NC 28402-1711
PO BOX 1712, WILMINGTON, NC 28402-1712
PO BOX 1713, WILMINGTON, NC 28402-1713
PO BOX 1714, WILMINGTON, NC 28402-1714
PO BOX 1715, WILMINGTON, NC 28402-1715
PO BOX 1716, WILMINGTON, NC 28402-1716
PO BOX 1717, WILMINGTON, NC 28402-1717
PO BOX 1718, WILMINGTON, NC 28402-1718
PO BOX 1719, WILMINGTON, NC 28402-1719
PO BOX 1720, WILMINGTON, NC 28402-1720
PO BOX 1721, WILMINGTON, NC 28402-1721
PO BOX 1722, WILMINGTON, NC 28402-1722
PO BOX 1723, WILMINGTON, NC 28402-1723
PO BOX 1724, WILMINGTON, NC 28402-1724
PO BOX 1725, WILMINGTON, NC 28402-1725
PO BOX 1726, WILMINGTON, NC 28402-1726
PO BOX 1727, WILMINGTON, NC 28402-1727
PO BOX 1728, WILMINGTON, NC 28402-1728
PO BOX 1729, WILMINGTON, NC 28402-1729
PO BOX 1730, WILMINGTON, NC 28402-1730
PO BOX 1731, WILMINGTON, NC 28402-1731
PO BOX 1732, WILMINGTON, NC 28402-1732
PO BOX 1733, WILMINGTON, NC 28402-1733
PO BOX 1734, WILMINGTON, NC 28402-1734
PO BOX 1735, WILMINGTON, NC 28402-1735
PO BOX 1736, WILMINGTON, NC 28402-1736
PO BOX 1737, WILMINGTON, NC 28402-1737
PO BOX 1738, WILMINGTON, NC 28402-1738
PO BOX 1739, WILMINGTON, NC 28402-1739
PO BOX 1740, WILMINGTON, NC 28402-1740
PO BOX 1741, WILMINGTON, NC 28402-1741
PO BOX 1742, WILMINGTON, NC 28402-1742
PO BOX 1743, WILMINGTON, NC 28402-1743
PO BOX 1744, WILMINGTON, NC 28402-1744
PO BOX 1745, WILMINGTON, NC 28402-1745
PO BOX 1746, WILMINGTON, NC 28402-1746
PO BOX 1747, WILMINGTON, NC 28402-1747
PO BOX 1748, WILMINGTON, NC 28402-1748
PO BOX 1749, WILMINGTON, NC 28402-1749
PO BOX 1750, WILMINGTON, NC 28402-1750
PO BOX 1751, WILMINGTON, NC 28402-1751
PO BOX 1752, WILMINGTON, NC 28402-1752
PO BOX 1753, WILMINGTON, NC 28402-1753
PO BOX 1754, WILMINGTON, NC 28402-1754
PO BOX 1755, WILMINGTON, NC 28402-1755
PO BOX 1756, WILMINGTON, NC 28402-1756
PO BOX 1757, WILMINGTON, NC 28402-1757
PO BOX 1758, WILMINGTON, NC 28402-1758
PO BOX 1759, WILMINGTON, NC 28402-1759
PO BOX 1760, WILMINGTON, NC 28402-1760
PO BOX 1761, WILMINGTON, NC 28402-1761
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