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 1641, GLENDALE, AZ 85311-1641
PO BOX 1642, GLENDALE, AZ 85311-1642
PO BOX 1643, GLENDALE, AZ 85311-1643
PO BOX 1644, GLENDALE, AZ 85311-1644
PO BOX 1645, GLENDALE, AZ 85311-1645
PO BOX 1646, GLENDALE, AZ 85311-1646
PO BOX 1647, GLENDALE, AZ 85311-1647
PO BOX 1648, GLENDALE, AZ 85311-1648
PO BOX 1649, GLENDALE, AZ 85311-1649
PO BOX 1650, GLENDALE, AZ 85311-1650
PO BOX 1651, GLENDALE, AZ 85311-1651
PO BOX 1652, GLENDALE, AZ 85311-1652
PO BOX 1653, GLENDALE, AZ 85311-1653
PO BOX 1654, GLENDALE, AZ 85311-1654
PO BOX 1655, GLENDALE, AZ 85311-1655
PO BOX 1656, GLENDALE, AZ 85311-1656
PO BOX 1657, GLENDALE, AZ 85311-1657
PO BOX 1658, GLENDALE, AZ 85311-1658
PO BOX 1659, GLENDALE, AZ 85311-1659
PO BOX 1660, GLENDALE, AZ 85311-1660
PO BOX 1661, GLENDALE, AZ 85311-1661
PO BOX 1662, GLENDALE, AZ 85311-1662
PO BOX 1663, GLENDALE, AZ 85311-1663
PO BOX 1664, GLENDALE, AZ 85311-1664
PO BOX 1665, GLENDALE, AZ 85311-1665
PO BOX 1666, GLENDALE, AZ 85311-1666
PO BOX 1667, GLENDALE, AZ 85311-1667
PO BOX 1668, GLENDALE, AZ 85311-1668
PO BOX 1669, GLENDALE, AZ 85311-1669
PO BOX 1670, GLENDALE, AZ 85311-1670
PO BOX 1671, GLENDALE, AZ 85311-1671
PO BOX 1672, GLENDALE, AZ 85311-1672
PO BOX 1673, GLENDALE, AZ 85311-1673
PO BOX 1674, GLENDALE, AZ 85311-1674
PO BOX 1675, GLENDALE, AZ 85311-1675
PO BOX 1676, GLENDALE, AZ 85311-1676
PO BOX 1677, GLENDALE, AZ 85311-1677
PO BOX 1678, GLENDALE, AZ 85311-1678
PO BOX 1679, GLENDALE, AZ 85311-1679
PO BOX 1680, GLENDALE, AZ 85311-1680
PO BOX 1681, GLENDALE, AZ 85311-1681
PO BOX 1682, GLENDALE, AZ 85311-1682
PO BOX 1683, GLENDALE, AZ 85311-1683
PO BOX 1684, GLENDALE, AZ 85311-1684
PO BOX 1685, GLENDALE, AZ 85311-1685
PO BOX 1686, GLENDALE, AZ 85311-1686
PO BOX 1687, GLENDALE, AZ 85311-1687
PO BOX 1688, GLENDALE, AZ 85311-1688
PO BOX 1689, GLENDALE, AZ 85311-1689
PO BOX 1690, GLENDALE, AZ 85311-1690
PO BOX 1691, GLENDALE, AZ 85311-1691
PO BOX 1692, GLENDALE, AZ 85311-1692
PO BOX 1693, GLENDALE, AZ 85311-1693
PO BOX 1694, GLENDALE, AZ 85311-1694
PO BOX 1695, GLENDALE, AZ 85311-1695
PO BOX 1696, GLENDALE, AZ 85311-1696
PO BOX 1697, GLENDALE, AZ 85311-1697
PO BOX 1698, GLENDALE, AZ 85311-1698
PO BOX 1699, GLENDALE, AZ 85311-1699
PO BOX 1700, GLENDALE, AZ 85311-1700
PO BOX 1701, GLENDALE, AZ 85311-1701
PO BOX 1702, GLENDALE, AZ 85311-1702
PO BOX 1703, GLENDALE, AZ 85311-1703
PO BOX 1704, GLENDALE, AZ 85311-1704
PO BOX 1705, GLENDALE, AZ 85311-1705
PO BOX 1706, GLENDALE, AZ 85311-1706
PO BOX 1707, GLENDALE, AZ 85311-1707
PO BOX 1708, GLENDALE, AZ 85311-1708
PO BOX 1709, GLENDALE, AZ 85311-1709
PO BOX 1710, GLENDALE, AZ 85311-1710
PO BOX 1711, GLENDALE, AZ 85311-1711
PO BOX 1712, GLENDALE, AZ 85311-1712
PO BOX 1713, GLENDALE, AZ 85311-1713
PO BOX 1714, GLENDALE, AZ 85311-1714
PO BOX 1715, GLENDALE, AZ 85311-1715
PO BOX 1716, GLENDALE, AZ 85311-1716
PO BOX 1717, GLENDALE, AZ 85311-1717
PO BOX 1718, GLENDALE, AZ 85311-1718
PO BOX 1719, GLENDALE, AZ 85311-1719
PO BOX 1720, GLENDALE, AZ 85311-1720
PO BOX 1721, GLENDALE, AZ 85311-1721
PO BOX 1722, GLENDALE, AZ 85311-1722
PO BOX 1723, GLENDALE, AZ 85311-1723
PO BOX 1724, GLENDALE, AZ 85311-1724
PO BOX 1725, GLENDALE, AZ 85311-1725
PO BOX 1726, GLENDALE, AZ 85311-1726
PO BOX 1727, GLENDALE, AZ 85311-1727
PO BOX 1728, GLENDALE, AZ 85311-1728
PO BOX 1729, GLENDALE, AZ 85311-1729
PO BOX 1730, GLENDALE, AZ 85311-1730
PO BOX 1731, GLENDALE, AZ 85311-1731
PO BOX 1732, GLENDALE, AZ 85311-1732
PO BOX 1733, GLENDALE, AZ 85311-1733
PO BOX 1734, GLENDALE, AZ 85311-1734
PO BOX 1735, GLENDALE, AZ 85311-1735
PO BOX 1736, GLENDALE, AZ 85311-1736
PO BOX 1737, GLENDALE, AZ 85311-1737
PO BOX 1738, GLENDALE, AZ 85311-1738
PO BOX 1739, GLENDALE, AZ 85311-1739
PO BOX 1740, GLENDALE, AZ 85311-1740
PO BOX 1741, GLENDALE, AZ 85311-1741
PO BOX 1742, GLENDALE, AZ 85311-1742
PO BOX 1743, GLENDALE, AZ 85311-1743
PO BOX 1744, GLENDALE, AZ 85311-1744
PO BOX 1745, GLENDALE, AZ 85311-1745
PO BOX 1746, GLENDALE, AZ 85311-1746
PO BOX 1747, GLENDALE, AZ 85311-1747
PO BOX 1748, GLENDALE, AZ 85311-1748
PO BOX 1749, GLENDALE, AZ 85311-1749
PO BOX 1750, GLENDALE, AZ 85311-1750
PO BOX 1751, GLENDALE, AZ 85311-1751
PO BOX 1752, GLENDALE, AZ 85311-1752
PO BOX 1753, GLENDALE, AZ 85311-1753
PO BOX 1754, GLENDALE, AZ 85311-1754
PO BOX 1755, GLENDALE, AZ 85311-1755
PO BOX 1756, GLENDALE, AZ 85311-1756
PO BOX 1757, GLENDALE, AZ 85311-1757
PO BOX 1758, GLENDALE, AZ 85311-1758
PO BOX 1759, GLENDALE, AZ 85311-1759
PO BOX 1760, GLENDALE, AZ 85311-1760
PO BOX 1761, GLENDALE, AZ 85311-1761
PO BOX 1762, GLENDALE, AZ 85311-1762
PO BOX 1763, GLENDALE, AZ 85311-1763
PO BOX 1764, GLENDALE, AZ 85311-1764
PO BOX 1765, GLENDALE, AZ 85311-1765
PO BOX 1766, GLENDALE, AZ 85311-1766
PO BOX 1767, GLENDALE, AZ 85311-1767
PO BOX 1768, GLENDALE, AZ 85311-1768
PO BOX 1769, GLENDALE, AZ 85311-1769
PO BOX 1770, GLENDALE, AZ 85311-1770
PO BOX 1771, GLENDALE, AZ 85311-1771
PO BOX 1772, GLENDALE, AZ 85311-1772
PO BOX 1773, GLENDALE, AZ 85311-1773
PO BOX 1774, GLENDALE, AZ 85311-1774
PO BOX 1775, GLENDALE, AZ 85311-1775
PO BOX 1776, GLENDALE, AZ 85311-1776
PO BOX 1777, GLENDALE, AZ 85311-1777
PO BOX 1778, GLENDALE, AZ 85311-1778
PO BOX 1779, GLENDALE, AZ 85311-1779
PO BOX 1780, GLENDALE, AZ 85311-1780
PO BOX 1781, GLENDALE, AZ 85311-1781
PO BOX 1782, GLENDALE, AZ 85311-1782
PO BOX 1783, GLENDALE, AZ 85311-1783
PO BOX 1784, GLENDALE, AZ 85311-1784
PO BOX 1785, GLENDALE, AZ 85311-1785
PO BOX 1786, GLENDALE, AZ 85311-1786
PO BOX 1787, GLENDALE, AZ 85311-1787
PO BOX 1788, GLENDALE, AZ 85311-1788
PO BOX 1789, GLENDALE, AZ 85311-1789
PO BOX 1790, GLENDALE, AZ 85311-1790
PO BOX 1791, GLENDALE, AZ 85311-1791
PO BOX 1792, GLENDALE, AZ 85311-1792
PO BOX 1793, GLENDALE, AZ 85311-1793
PO BOX 1794, GLENDALE, AZ 85311-1794
PO BOX 1795, GLENDALE, AZ 85311-1795
PO BOX 1796, GLENDALE, AZ 85311-1796
PO BOX 1797, GLENDALE, AZ 85311-1797
PO BOX 1798, GLENDALE, AZ 85311-1798
PO BOX 1799, GLENDALE, AZ 85311-1799
PO BOX 1800, GLENDALE, AZ 85311-1800
PO BOX 1801, GLENDALE, AZ 85311-1801
PO BOX 1802, GLENDALE, AZ 85311-1802
PO BOX 1803, GLENDALE, AZ 85311-1803
PO BOX 1804, GLENDALE, AZ 85311-1804
PO BOX 1805, GLENDALE, AZ 85311-1805
PO BOX 1806, GLENDALE, AZ 85311-1806
PO BOX 1807, GLENDALE, AZ 85311-1807
PO BOX 1808, GLENDALE, AZ 85311-1808
PO BOX 1809, GLENDALE, AZ 85311-1809
PO BOX 1810, GLENDALE, AZ 85311-1810
PO BOX 1811, GLENDALE, AZ 85311-1811
PO BOX 1812, GLENDALE, AZ 85311-1812
PO BOX 1813, GLENDALE, AZ 85311-1813
PO BOX 1814, GLENDALE, AZ 85311-1814
PO BOX 1815, GLENDALE, AZ 85311-1815
PO BOX 1816, GLENDALE, AZ 85311-1816
PO BOX 1817, GLENDALE, AZ 85311-1817
PO BOX 1818, GLENDALE, AZ 85311-1818
PO BOX 1819, GLENDALE, AZ 85311-1819
PO BOX 1820, GLENDALE, AZ 85311-1820
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