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, MONTEREY, CA 93942-1561
PO BOX 1562, MONTEREY, CA 93942-1562
PO BOX 1563, MONTEREY, CA 93942-1563
PO BOX 1564, MONTEREY, CA 93942-1564
PO BOX 1565, MONTEREY, CA 93942-1565
PO BOX 1566, MONTEREY, CA 93942-1566
PO BOX 1567, MONTEREY, CA 93942-1567
PO BOX 1568, MONTEREY, CA 93942-1568
PO BOX 1569, MONTEREY, CA 93942-1569
PO BOX 1570, MONTEREY, CA 93942-1570
PO BOX 1571, MONTEREY, CA 93942-1571
PO BOX 1572, MONTEREY, CA 93942-1572
PO BOX 1573, MONTEREY, CA 93942-1573
PO BOX 1574, MONTEREY, CA 93942-1574
PO BOX 1575, MONTEREY, CA 93942-1575
PO BOX 1576, MONTEREY, CA 93942-1576
PO BOX 1577, MONTEREY, CA 93942-1577
PO BOX 1578, MONTEREY, CA 93942-1578
PO BOX 1579, MONTEREY, CA 93942-1579
PO BOX 1580, MONTEREY, CA 93942-1580
PO BOX 1581, MONTEREY, CA 93942-1581
PO BOX 1582, MONTEREY, CA 93942-1582
PO BOX 1583, MONTEREY, CA 93942-1583
PO BOX 1584, MONTEREY, CA 93942-1584
PO BOX 1585, MONTEREY, CA 93942-1585
PO BOX 1586, MONTEREY, CA 93942-1586
PO BOX 1587, MONTEREY, CA 93942-1587
PO BOX 1588, MONTEREY, CA 93942-1588
PO BOX 1589, MONTEREY, CA 93942-1589
PO BOX 1590, MONTEREY, CA 93942-1590
PO BOX 1591, MONTEREY, CA 93942-1591
PO BOX 1592, MONTEREY, CA 93942-1592
PO BOX 1593, MONTEREY, CA 93942-1593
PO BOX 1594, MONTEREY, CA 93942-1594
PO BOX 1595, MONTEREY, CA 93942-1595
PO BOX 1596, MONTEREY, CA 93942-1596
PO BOX 1597, MONTEREY, CA 93942-1597
PO BOX 1598, MONTEREY, CA 93942-1598
PO BOX 1599, MONTEREY, CA 93942-1599
PO BOX 1600, MONTEREY, CA 93942-1600
PO BOX 1601, MONTEREY, CA 93942-1601
PO BOX 1602, MONTEREY, CA 93942-1602
PO BOX 1603, MONTEREY, CA 93942-1603
PO BOX 1604, MONTEREY, CA 93942-1604
PO BOX 1605, MONTEREY, CA 93942-1605
PO BOX 1606, MONTEREY, CA 93942-1606
PO BOX 1607, MONTEREY, CA 93942-1607
PO BOX 1608, MONTEREY, CA 93942-1608
PO BOX 1609, MONTEREY, CA 93942-1609
PO BOX 1610, MONTEREY, CA 93942-1610
PO BOX 1611, MONTEREY, CA 93942-1611
PO BOX 1612, MONTEREY, CA 93942-1612
PO BOX 1613, MONTEREY, CA 93942-1613
PO BOX 1614, MONTEREY, CA 93942-1614
PO BOX 1615, MONTEREY, CA 93942-1615
PO BOX 1616, MONTEREY, CA 93942-1616
PO BOX 1617, MONTEREY, CA 93942-1617
PO BOX 1618, MONTEREY, CA 93942-1618
PO BOX 1619, MONTEREY, CA 93942-1619
PO BOX 1620, MONTEREY, CA 93942-1620
PO BOX 1621, MONTEREY, CA 93942-1621
PO BOX 1622, MONTEREY, CA 93942-1622
PO BOX 1623, MONTEREY, CA 93942-1623
PO BOX 1624, MONTEREY, CA 93942-1624
PO BOX 1625, MONTEREY, CA 93942-1625
PO BOX 1626, MONTEREY, CA 93942-1626
PO BOX 1627, MONTEREY, CA 93942-1627
PO BOX 1628, MONTEREY, CA 93942-1628
PO BOX 1629, MONTEREY, CA 93942-1629
PO BOX 1630, MONTEREY, CA 93942-1630
PO BOX 1631, MONTEREY, CA 93942-1631
PO BOX 1632, MONTEREY, CA 93942-1632
PO BOX 1633, MONTEREY, CA 93942-1633
PO BOX 1634, MONTEREY, CA 93942-1634
PO BOX 1635, MONTEREY, CA 93942-1635
PO BOX 1636, MONTEREY, CA 93942-1636
PO BOX 1637, MONTEREY, CA 93942-1637
PO BOX 1638, MONTEREY, CA 93942-1638
PO BOX 1639, MONTEREY, CA 93942-1639
PO BOX 1640, MONTEREY, CA 93942-1640
PO BOX 1641, MONTEREY, CA 93942-1641
PO BOX 1642, MONTEREY, CA 93942-1642
PO BOX 1643, MONTEREY, CA 93942-1643
PO BOX 1644, MONTEREY, CA 93942-1644
PO BOX 1645, MONTEREY, CA 93942-1645
PO BOX 1646, MONTEREY, CA 93942-1646
PO BOX 1647, MONTEREY, CA 93942-1647
PO BOX 1648, MONTEREY, CA 93942-1648
PO BOX 1649, MONTEREY, CA 93942-1649
PO BOX 1650, MONTEREY, CA 93942-1650
PO BOX 1651, MONTEREY, CA 93942-1651
PO BOX 1652, MONTEREY, CA 93942-1652
PO BOX 1653, MONTEREY, CA 93942-1653
PO BOX 1654, MONTEREY, CA 93942-1654
PO BOX 1655, MONTEREY, CA 93942-1655
PO BOX 1656, MONTEREY, CA 93942-1656
PO BOX 1657, MONTEREY, CA 93942-1657
PO BOX 1658, MONTEREY, CA 93942-1658
PO BOX 1659, MONTEREY, CA 93942-1659
PO BOX 1660, MONTEREY, CA 93942-1660
PO BOX 1661, MONTEREY, CA 93942-1661
PO BOX 1662, MONTEREY, CA 93942-1662
PO BOX 1663, MONTEREY, CA 93942-1663
PO BOX 1664, MONTEREY, CA 93942-1664
PO BOX 1665, MONTEREY, CA 93942-1665
PO BOX 1666, MONTEREY, CA 93942-1666
PO BOX 1667, MONTEREY, CA 93942-1667
PO BOX 1668, MONTEREY, CA 93942-1668
PO BOX 1669, MONTEREY, CA 93942-1669
PO BOX 1670, MONTEREY, CA 93942-1670
PO BOX 1671, MONTEREY, CA 93942-1671
PO BOX 1672, MONTEREY, CA 93942-1672
PO BOX 1673, MONTEREY, CA 93942-1673
PO BOX 1674, MONTEREY, CA 93942-1674
PO BOX 1675, MONTEREY, CA 93942-1675
PO BOX 1676, MONTEREY, CA 93942-1676
PO BOX 1677, MONTEREY, CA 93942-1677
PO BOX 1678, MONTEREY, CA 93942-1678
PO BOX 1679, MONTEREY, CA 93942-1679
PO BOX 1680, MONTEREY, CA 93942-1680
PO BOX 1681, MONTEREY, CA 93942-1681
PO BOX 1682, MONTEREY, CA 93942-1682
PO BOX 1683, MONTEREY, CA 93942-1683
PO BOX 1684, MONTEREY, CA 93942-1684
PO BOX 1685, MONTEREY, CA 93942-1685
PO BOX 1686, MONTEREY, CA 93942-1686
PO BOX 1687, MONTEREY, CA 93942-1687
PO BOX 1688, MONTEREY, CA 93942-1688
PO BOX 1689, MONTEREY, CA 93942-1689
PO BOX 1690, MONTEREY, CA 93942-1690
PO BOX 1691, MONTEREY, CA 93942-1691
PO BOX 1692, MONTEREY, CA 93942-1692
PO BOX 1693, MONTEREY, CA 93942-1693
PO BOX 1694, MONTEREY, CA 93942-1694
PO BOX 1695, MONTEREY, CA 93942-1695
PO BOX 1696, MONTEREY, CA 93942-1696
PO BOX 1697, MONTEREY, CA 93942-1697
PO BOX 1698, MONTEREY, CA 93942-1698
PO BOX 1699, MONTEREY, CA 93942-1699
PO BOX 1700, MONTEREY, CA 93942-1700
PO BOX 1701, MONTEREY, CA 93942-1701
PO BOX 1702, MONTEREY, CA 93942-1702
PO BOX 1703, MONTEREY, CA 93942-1703
PO BOX 1704, MONTEREY, CA 93942-1704
PO BOX 1705, MONTEREY, CA 93942-1705
PO BOX 1706, MONTEREY, CA 93942-1706
PO BOX 1707, MONTEREY, CA 93942-1707
PO BOX 1708, MONTEREY, CA 93942-1708
PO BOX 1709, MONTEREY, CA 93942-1709
PO BOX 1710, MONTEREY, CA 93942-1710
PO BOX 1711, MONTEREY, CA 93942-1711
PO BOX 1712, MONTEREY, CA 93942-1712
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