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 1521, FLAT ROCK, NC 28731-1521
PO BOX 1522, FLAT ROCK, NC 28731-1522
PO BOX 1523, FLAT ROCK, NC 28731-1523
PO BOX 1524, FLAT ROCK, NC 28731-1524
PO BOX 1525, FLAT ROCK, NC 28731-1525
PO BOX 1526, FLAT ROCK, NC 28731-1526
PO BOX 1527, FLAT ROCK, NC 28731-1527
PO BOX 1528, FLAT ROCK, NC 28731-1528
PO BOX 1529, FLAT ROCK, NC 28731-1529
PO BOX 1530, FLAT ROCK, NC 28731-1530
PO BOX 1531, FLAT ROCK, NC 28731-1531
PO BOX 1532, FLAT ROCK, NC 28731-1532
PO BOX 1533, FLAT ROCK, NC 28731-1533
PO BOX 1534, FLAT ROCK, NC 28731-1534
PO BOX 1535, FLAT ROCK, NC 28731-1535
PO BOX 1536, FLAT ROCK, NC 28731-1536
PO BOX 1537, FLAT ROCK, NC 28731-1537
PO BOX 1538, FLAT ROCK, NC 28731-1538
PO BOX 1539, FLAT ROCK, NC 28731-1539
PO BOX 1540, FLAT ROCK, NC 28731-1540
PO BOX 1541, FLAT ROCK, NC 28731-1541
PO BOX 1542, FLAT ROCK, NC 28731-1542
PO BOX 1543, FLAT ROCK, NC 28731-1543
PO BOX 1544, FLAT ROCK, NC 28731-1544
PO BOX 1545, FLAT ROCK, NC 28731-1545
PO BOX 1546, FLAT ROCK, NC 28731-1546
PO BOX 1547, FLAT ROCK, NC 28731-1547
PO BOX 1548, FLAT ROCK, NC 28731-1548
PO BOX 1549, FLAT ROCK, NC 28731-1549
PO BOX 1550, FLAT ROCK, NC 28731-1550
PO BOX 1551, FLAT ROCK, NC 28731-1551
PO BOX 1552, FLAT ROCK, NC 28731-1552
PO BOX 1553, FLAT ROCK, NC 28731-1553
PO BOX 1554, FLAT ROCK, NC 28731-1554
PO BOX 1555, FLAT ROCK, NC 28731-1555
PO BOX 1556, FLAT ROCK, NC 28731-1556
PO BOX 1557, FLAT ROCK, NC 28731-1557
PO BOX 1558, FLAT ROCK, NC 28731-1558
PO BOX 1559, FLAT ROCK, NC 28731-1559
PO BOX 1560, FLAT ROCK, NC 28731-1560
PO BOX 1561, FLAT ROCK, NC 28731-1561
PO BOX 1562, FLAT ROCK, NC 28731-1562
PO BOX 1563, FLAT ROCK, NC 28731-1563
PO BOX 1564, FLAT ROCK, NC 28731-1564
PO BOX 1565, FLAT ROCK, NC 28731-1565
PO BOX 1566, FLAT ROCK, NC 28731-1566
PO BOX 1567, FLAT ROCK, NC 28731-1567
PO BOX 1568, FLAT ROCK, NC 28731-1568
PO BOX 1569, FLAT ROCK, NC 28731-1569
PO BOX 1570, FLAT ROCK, NC 28731-1570
PO BOX 1571, FLAT ROCK, NC 28731-1571
PO BOX 1572, FLAT ROCK, NC 28731-1572
PO BOX 1573, FLAT ROCK, NC 28731-1573
PO BOX 1574, FLAT ROCK, NC 28731-1574
PO BOX 1575, FLAT ROCK, NC 28731-1575
PO BOX 1576, FLAT ROCK, NC 28731-1576
PO BOX 1577, FLAT ROCK, NC 28731-1577
PO BOX 1578, FLAT ROCK, NC 28731-1578
PO BOX 1579, FLAT ROCK, NC 28731-1579
PO BOX 1580, FLAT ROCK, NC 28731-1580
PO BOX 1581, FLAT ROCK, NC 28731-1581
PO BOX 1582, FLAT ROCK, NC 28731-1582
PO BOX 1583, FLAT ROCK, NC 28731-1583
PO BOX 1584, FLAT ROCK, NC 28731-1584
PO BOX 1585, FLAT ROCK, NC 28731-1585
PO BOX 1586, FLAT ROCK, NC 28731-1586
PO BOX 1587, FLAT ROCK, NC 28731-1587
PO BOX 1588, FLAT ROCK, NC 28731-1588
PO BOX 1589, FLAT ROCK, NC 28731-1589
PO BOX 1590, FLAT ROCK, NC 28731-1590
PO BOX 1591, FLAT ROCK, NC 28731-1591
PO BOX 1592, FLAT ROCK, NC 28731-1592
PO BOX 1593, FLAT ROCK, NC 28731-1593
PO BOX 1594, FLAT ROCK, NC 28731-1594
PO BOX 1595, FLAT ROCK, NC 28731-1595
PO BOX 1596, FLAT ROCK, NC 28731-1596
PO BOX 1597, FLAT ROCK, NC 28731-1597
PO BOX 1598, FLAT ROCK, NC 28731-1598
PO BOX 1599, FLAT ROCK, NC 28731-1599
PO BOX 1600, FLAT ROCK, NC 28731-1600
PO BOX 1601, FLAT ROCK, NC 28731-1601
PO BOX 1602, FLAT ROCK, NC 28731-1602
PO BOX 1603, FLAT ROCK, NC 28731-1603
PO BOX 1604, FLAT ROCK, NC 28731-1604
PO BOX 1605, FLAT ROCK, NC 28731-1605
PO BOX 1606, FLAT ROCK, NC 28731-1606
PO BOX 1607, FLAT ROCK, NC 28731-1607
PO BOX 1608, FLAT ROCK, NC 28731-1608
PO BOX 1609, FLAT ROCK, NC 28731-1609
PO BOX 1610, FLAT ROCK, NC 28731-1610
PO BOX 1611, FLAT ROCK, NC 28731-1611
PO BOX 1612, FLAT ROCK, NC 28731-1612
PO BOX 1613, FLAT ROCK, NC 28731-1613
PO BOX 1614, FLAT ROCK, NC 28731-1614
PO BOX 1615, FLAT ROCK, NC 28731-1615
PO BOX 1616, FLAT ROCK, NC 28731-1616
PO BOX 1617, FLAT ROCK, NC 28731-1617
PO BOX 1618, FLAT ROCK, NC 28731-1618
PO BOX 1619, FLAT ROCK, NC 28731-1619
PO BOX 1620, FLAT ROCK, NC 28731-1620
PO BOX 1621, FLAT ROCK, NC 28731-1621
PO BOX 1622, FLAT ROCK, NC 28731-1622
PO BOX 1623, FLAT ROCK, NC 28731-1623
PO BOX 1624, FLAT ROCK, NC 28731-1624
PO BOX 1625, FLAT ROCK, NC 28731-1625
PO BOX 1626, FLAT ROCK, NC 28731-1626
PO BOX 1627, FLAT ROCK, NC 28731-1627
PO BOX 1628, FLAT ROCK, NC 28731-1628
PO BOX 1629, FLAT ROCK, NC 28731-1629
PO BOX 1630, FLAT ROCK, NC 28731-1630
PO BOX 1631, FLAT ROCK, NC 28731-1631
PO BOX 1632, FLAT ROCK, NC 28731-1632
PO BOX 1633, FLAT ROCK, NC 28731-1633
PO BOX 1634, FLAT ROCK, NC 28731-1634
PO BOX 1635, FLAT ROCK, NC 28731-1635
PO BOX 1636, FLAT ROCK, NC 28731-1636
PO BOX 1637, FLAT ROCK, NC 28731-1637
PO BOX 1638, FLAT ROCK, NC 28731-1638
PO BOX 1639, FLAT ROCK, NC 28731-1639
PO BOX 1640, FLAT ROCK, NC 28731-1640
PO BOX 1641, FLAT ROCK, NC 28731-1641
PO BOX 1642, FLAT ROCK, NC 28731-1642
PO BOX 1643, FLAT ROCK, NC 28731-1643
PO BOX 1644, FLAT ROCK, NC 28731-1644
PO BOX 1645, FLAT ROCK, NC 28731-1645
PO BOX 1646, FLAT ROCK, NC 28731-1646
PO BOX 1647, FLAT ROCK, NC 28731-1647
PO BOX 1648, FLAT ROCK, NC 28731-1648
PO BOX 1649, FLAT ROCK, NC 28731-1649
PO BOX 1650, FLAT ROCK, NC 28731-1650
PO BOX 1651, FLAT ROCK, NC 28731-1651
PO BOX 1652, FLAT ROCK, NC 28731-1652
PO BOX 1653, FLAT ROCK, NC 28731-1653
PO BOX 1654, FLAT ROCK, NC 28731-1654
PO BOX 1655, FLAT ROCK, NC 28731-1655
PO BOX 1656, FLAT ROCK, NC 28731-1656
PO BOX 1657, FLAT ROCK, NC 28731-1657
PO BOX 1658, FLAT ROCK, NC 28731-1658
PO BOX 1659, FLAT ROCK, NC 28731-1659
PO BOX 1660, FLAT ROCK, NC 28731-1660
PO BOX 1661, FLAT ROCK, NC 28731-1661
PO BOX 1662, FLAT ROCK, NC 28731-1662
PO BOX 1663, FLAT ROCK, NC 28731-1663
PO BOX 1664, FLAT ROCK, NC 28731-1664
PO BOX 1665, FLAT ROCK, NC 28731-1665
PO BOX 1666, FLAT ROCK, NC 28731-1666
PO BOX 1667, FLAT ROCK, NC 28731-1667
PO BOX 1668, FLAT ROCK, NC 28731-1668
PO BOX 1669, FLAT ROCK, NC 28731-1669
PO BOX 1670, FLAT ROCK, NC 28731-1670
PO BOX 1671, FLAT ROCK, NC 28731-1671
PO BOX 1672, FLAT ROCK, NC 28731-1672
PO BOX 1673, FLAT ROCK, NC 28731-1673
PO BOX 1674, FLAT ROCK, NC 28731-1674
PO BOX 1675, FLAT ROCK, NC 28731-1675
PO BOX 1676, FLAT ROCK, NC 28731-1676
PO BOX 1677, FLAT ROCK, NC 28731-1677
PO BOX 1678, FLAT ROCK, NC 28731-1678
PO BOX 1679, FLAT ROCK, NC 28731-1679
PO BOX 1680, FLAT ROCK, NC 28731-1680
PO BOX 1681, FLAT ROCK, NC 28731-1681
PO BOX 1682, FLAT ROCK, NC 28731-1682
PO BOX 1683, FLAT ROCK, NC 28731-1683
PO BOX 1684, FLAT ROCK, NC 28731-1684
PO BOX 1685, FLAT ROCK, NC 28731-1685
PO BOX 1686, FLAT ROCK, NC 28731-1686
PO BOX 1687, FLAT ROCK, NC 28731-1687
PO BOX 1688, FLAT ROCK, NC 28731-1688
PO BOX 1689, FLAT ROCK, NC 28731-1689
PO BOX 1690, FLAT ROCK, NC 28731-1690
PO BOX 1691, FLAT ROCK, NC 28731-1691
PO BOX 1692, FLAT ROCK, NC 28731-1692
PO BOX 1693, FLAT ROCK, NC 28731-1693
PO BOX 1694, FLAT ROCK, NC 28731-1694
PO BOX 1695, FLAT ROCK, NC 28731-1695
PO BOX 1696, FLAT ROCK, NC 28731-1696
PO BOX 1697, FLAT ROCK, NC 28731-1697
PO BOX 1698, FLAT ROCK, NC 28731-1698
PO BOX 1699, FLAT ROCK, NC 28731-1699
PO BOX 1700, FLAT ROCK, NC 28731-1700
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