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 10741, CANOGA PARK, CA 91309-1741
PO BOX 10742, CANOGA PARK, CA 91309-1742
PO BOX 10743, CANOGA PARK, CA 91309-1743
PO BOX 10744, CANOGA PARK, CA 91309-1744
PO BOX 10745, CANOGA PARK, CA 91309-1745
PO BOX 10746, CANOGA PARK, CA 91309-1746
PO BOX 10747, CANOGA PARK, CA 91309-1747
PO BOX 10748, CANOGA PARK, CA 91309-1748
PO BOX 10749, CANOGA PARK, CA 91309-1749
PO BOX 10750, CANOGA PARK, CA 91309-1750
PO BOX 10751, CANOGA PARK, CA 91309-1751
PO BOX 10752, CANOGA PARK, CA 91309-1752
PO BOX 10753, CANOGA PARK, CA 91309-1753
PO BOX 10754, CANOGA PARK, CA 91309-1754
PO BOX 10755, CANOGA PARK, CA 91309-1755
PO BOX 10756, CANOGA PARK, CA 91309-1756
PO BOX 10757, CANOGA PARK, CA 91309-1757
PO BOX 10758, CANOGA PARK, CA 91309-1758
PO BOX 10759, CANOGA PARK, CA 91309-1759
PO BOX 10760, CANOGA PARK, CA 91309-1760
PO BOX 10761, CANOGA PARK, CA 91309-1761
PO BOX 10762, CANOGA PARK, CA 91309-1762
PO BOX 10763, CANOGA PARK, CA 91309-1763
PO BOX 10764, CANOGA PARK, CA 91309-1764
PO BOX 10765, CANOGA PARK, CA 91309-1765
PO BOX 10766, CANOGA PARK, CA 91309-1766
PO BOX 10767, CANOGA PARK, CA 91309-1767
PO BOX 10768, CANOGA PARK, CA 91309-1768
PO BOX 10769, CANOGA PARK, CA 91309-1769
PO BOX 10770, CANOGA PARK, CA 91309-1770
PO BOX 10771, CANOGA PARK, CA 91309-1771
PO BOX 10772, CANOGA PARK, CA 91309-1772
PO BOX 10773, CANOGA PARK, CA 91309-1773
PO BOX 10774, CANOGA PARK, CA 91309-1774
PO BOX 10775, CANOGA PARK, CA 91309-1775
PO BOX 10776, CANOGA PARK, CA 91309-1776
PO BOX 10777, CANOGA PARK, CA 91309-1777
PO BOX 10778, CANOGA PARK, CA 91309-1778
PO BOX 10779, CANOGA PARK, CA 91309-1779
PO BOX 10780, CANOGA PARK, CA 91309-1780
PO BOX 10781, CANOGA PARK, CA 91309-1781
PO BOX 10782, CANOGA PARK, CA 91309-1782
PO BOX 10783, CANOGA PARK, CA 91309-1783
PO BOX 10784, CANOGA PARK, CA 91309-1784
PO BOX 10785, CANOGA PARK, CA 91309-1785
PO BOX 10786, CANOGA PARK, CA 91309-1786
PO BOX 10787, CANOGA PARK, CA 91309-1787
PO BOX 10788, CANOGA PARK, CA 91309-1788
PO BOX 10789, CANOGA PARK, CA 91309-1789
PO BOX 10790, CANOGA PARK, CA 91309-1790
PO BOX 10791, CANOGA PARK, CA 91309-1791
PO BOX 10792, CANOGA PARK, CA 91309-1792
PO BOX 10793, CANOGA PARK, CA 91309-1793
PO BOX 10794, CANOGA PARK, CA 91309-1794
PO BOX 10795, CANOGA PARK, CA 91309-1795
PO BOX 10796, CANOGA PARK, CA 91309-1796
PO BOX 10797, CANOGA PARK, CA 91309-1797
PO BOX 10798, CANOGA PARK, CA 91309-1798
PO BOX 10799, CANOGA PARK, CA 91309-1799
PO BOX 10800, CANOGA PARK, CA 91309-1800
PO BOX 10801, CANOGA PARK, CA 91309-1801
PO BOX 10802, CANOGA PARK, CA 91309-1802
PO BOX 10803, CANOGA PARK, CA 91309-1803
PO BOX 10804, CANOGA PARK, CA 91309-1804
PO BOX 10805, CANOGA PARK, CA 91309-1805
PO BOX 10806, CANOGA PARK, CA 91309-1806
PO BOX 10807, CANOGA PARK, CA 91309-1807
PO BOX 10808, CANOGA PARK, CA 91309-1808
PO BOX 10809, CANOGA PARK, CA 91309-1809
PO BOX 10810, CANOGA PARK, CA 91309-1810
PO BOX 10811, CANOGA PARK, CA 91309-1811
PO BOX 10812, CANOGA PARK, CA 91309-1812
PO BOX 10813, CANOGA PARK, CA 91309-1813
PO BOX 10814, CANOGA PARK, CA 91309-1814
PO BOX 10815, CANOGA PARK, CA 91309-1815
PO BOX 10816, CANOGA PARK, CA 91309-1816
PO BOX 10817, CANOGA PARK, CA 91309-1817
PO BOX 10818, CANOGA PARK, CA 91309-1818
PO BOX 10819, CANOGA PARK, CA 91309-1819
PO BOX 10820, CANOGA PARK, CA 91309-1820
PO BOX 10821, CANOGA PARK, CA 91309-1821
PO BOX 10822, CANOGA PARK, CA 91309-1822
PO BOX 10823, CANOGA PARK, CA 91309-1823
PO BOX 10824, CANOGA PARK, CA 91309-1824
PO BOX 10825, CANOGA PARK, CA 91309-1825
PO BOX 10826, CANOGA PARK, CA 91309-1826
PO BOX 10827, CANOGA PARK, CA 91309-1827
PO BOX 10828, CANOGA PARK, CA 91309-1828
PO BOX 10829, CANOGA PARK, CA 91309-1829
PO BOX 10830, CANOGA PARK, CA 91309-1830
PO BOX 10831, CANOGA PARK, CA 91309-1831
PO BOX 10832, CANOGA PARK, CA 91309-1832
PO BOX 10833, CANOGA PARK, CA 91309-1833
PO BOX 10834, CANOGA PARK, CA 91309-1834
PO BOX 10835, CANOGA PARK, CA 91309-1835
PO BOX 10836, CANOGA PARK, CA 91309-1836
PO BOX 10837, CANOGA PARK, CA 91309-1837
PO BOX 10838, CANOGA PARK, CA 91309-1838
PO BOX 10839, CANOGA PARK, CA 91309-1839
PO BOX 10840, CANOGA PARK, CA 91309-1840
PO BOX 10841, CANOGA PARK, CA 91309-1841
PO BOX 10842, CANOGA PARK, CA 91309-1842
PO BOX 10843, CANOGA PARK, CA 91309-1843
PO BOX 10844, CANOGA PARK, CA 91309-1844
PO BOX 10845, CANOGA PARK, CA 91309-1845
PO BOX 10846, CANOGA PARK, CA 91309-1846
PO BOX 10847, CANOGA PARK, CA 91309-1847
PO BOX 10848, CANOGA PARK, CA 91309-1848
PO BOX 10849, CANOGA PARK, CA 91309-1849
PO BOX 10850, CANOGA PARK, CA 91309-1850
PO BOX 10851, CANOGA PARK, CA 91309-1851
PO BOX 10852, CANOGA PARK, CA 91309-1852
PO BOX 10853, CANOGA PARK, CA 91309-1853
PO BOX 10854, CANOGA PARK, CA 91309-1854
PO BOX 10855, CANOGA PARK, CA 91309-1855
PO BOX 10856, CANOGA PARK, CA 91309-1856
PO BOX 10857, CANOGA PARK, CA 91309-1857
PO BOX 10858, CANOGA PARK, CA 91309-1858
PO BOX 10859, CANOGA PARK, CA 91309-1859
PO BOX 10860, CANOGA PARK, CA 91309-1860
PO BOX 10861, CANOGA PARK, CA 91309-1861
PO BOX 10862, CANOGA PARK, CA 91309-1862
PO BOX 10863, CANOGA PARK, CA 91309-1863
PO BOX 10864, CANOGA PARK, CA 91309-1864
PO BOX 10865, CANOGA PARK, CA 91309-1865
PO BOX 10866, CANOGA PARK, CA 91309-1866
PO BOX 10867, CANOGA PARK, CA 91309-1867
PO BOX 10868, CANOGA PARK, CA 91309-1868
PO BOX 10869, CANOGA PARK, CA 91309-1869
PO BOX 10870, CANOGA PARK, CA 91309-1870
PO BOX 10871, CANOGA PARK, CA 91309-1871
PO BOX 10872, CANOGA PARK, CA 91309-1872
PO BOX 10873, CANOGA PARK, CA 91309-1873
PO BOX 10874, CANOGA PARK, CA 91309-1874
PO BOX 10875, CANOGA PARK, CA 91309-1875
PO BOX 10876, CANOGA PARK, CA 91309-1876
PO BOX 10877, CANOGA PARK, CA 91309-1877
PO BOX 10878, CANOGA PARK, CA 91309-1878
PO BOX 10879, CANOGA PARK, CA 91309-1879
PO BOX 10880, CANOGA PARK, CA 91309-1880
PO BOX 10881, CANOGA PARK, CA 91309-1881
PO BOX 10882, CANOGA PARK, CA 91309-1882
PO BOX 10883, CANOGA PARK, CA 91309-1883
PO BOX 10884, CANOGA PARK, CA 91309-1884
PO BOX 10885, CANOGA PARK, CA 91309-1885
PO BOX 10886, CANOGA PARK, CA 91309-1886
PO BOX 10887, CANOGA PARK, CA 91309-1887
PO BOX 10888, CANOGA PARK, CA 91309-1888
PO BOX 10889, CANOGA PARK, CA 91309-1889
PO BOX 10890, CANOGA PARK, CA 91309-1890
PO BOX 10891, CANOGA PARK, CA 91309-1891
PO BOX 10892, CANOGA PARK, CA 91309-1892
PO BOX 10893, CANOGA PARK, CA 91309-1893
PO BOX 10894, CANOGA PARK, CA 91309-1894
PO BOX 10895, CANOGA PARK, CA 91309-1895
PO BOX 10896, CANOGA PARK, CA 91309-1896
PO BOX 10897, CANOGA PARK, CA 91309-1897
PO BOX 10898, CANOGA PARK, CA 91309-1898
PO BOX 10899, CANOGA PARK, CA 91309-1899
PO BOX 10900, CANOGA PARK, CA 91309-1900
PO BOX 10901, CANOGA PARK, CA 91309-1901
PO BOX 10902, CANOGA PARK, CA 91309-1902
PO BOX 10903, CANOGA PARK, CA 91309-1903
PO BOX 10904, CANOGA PARK, CA 91309-1904
PO BOX 10905, CANOGA PARK, CA 91309-1905
PO BOX 10906, CANOGA PARK, CA 91309-1906
PO BOX 10907, CANOGA PARK, CA 91309-1907
PO BOX 10908, CANOGA PARK, CA 91309-1908
PO BOX 10909, CANOGA PARK, CA 91309-1909
PO BOX 10910, CANOGA PARK, CA 91309-1910
PO BOX 10911, CANOGA PARK, CA 91309-1911
PO BOX 10912, CANOGA PARK, CA 91309-1912
PO BOX 10913, CANOGA PARK, CA 91309-1913
PO BOX 10914, CANOGA PARK, CA 91309-1914
PO BOX 10915, CANOGA PARK, CA 91309-1915
PO BOX 10916, CANOGA PARK, CA 91309-1916
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