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 1741, FALLBROOK, CA 92088-1741
PO BOX 1742, FALLBROOK, CA 92088-1742
PO BOX 1743, FALLBROOK, CA 92088-1743
PO BOX 1744, FALLBROOK, CA 92088-1744
PO BOX 1745, FALLBROOK, CA 92088-1745
PO BOX 1746, FALLBROOK, CA 92088-1746
PO BOX 1747, FALLBROOK, CA 92088-1747
PO BOX 1748, FALLBROOK, CA 92088-1748
PO BOX 1749, FALLBROOK, CA 92088-1749
PO BOX 1750, FALLBROOK, CA 92088-1750
PO BOX 1751, FALLBROOK, CA 92088-1751
PO BOX 1752, FALLBROOK, CA 92088-1752
PO BOX 1753, FALLBROOK, CA 92088-1753
PO BOX 1754, FALLBROOK, CA 92088-1754
PO BOX 1755, FALLBROOK, CA 92088-1755
PO BOX 1756, FALLBROOK, CA 92088-1756
PO BOX 1757, FALLBROOK, CA 92088-1757
PO BOX 1758, FALLBROOK, CA 92088-1758
PO BOX 1759, FALLBROOK, CA 92088-1759
PO BOX 1760, FALLBROOK, CA 92088-1760
PO BOX 1761, FALLBROOK, CA 92088-1761
PO BOX 1762, FALLBROOK, CA 92088-1762
PO BOX 1763, FALLBROOK, CA 92088-1763
PO BOX 1764, FALLBROOK, CA 92088-1764
PO BOX 1765, FALLBROOK, CA 92088-1765
PO BOX 1766, FALLBROOK, CA 92088-1766
PO BOX 1767, FALLBROOK, CA 92088-1767
PO BOX 1768, FALLBROOK, CA 92088-1768
PO BOX 1769, FALLBROOK, CA 92088-1769
PO BOX 1770, FALLBROOK, CA 92088-1770
PO BOX 1771, FALLBROOK, CA 92088-1771
PO BOX 1772, FALLBROOK, CA 92088-1772
PO BOX 1773, FALLBROOK, CA 92088-1773
PO BOX 1774, FALLBROOK, CA 92088-1774
PO BOX 1775, FALLBROOK, CA 92088-1775
PO BOX 1776, FALLBROOK, CA 92088-1776
PO BOX 1777, FALLBROOK, CA 92088-1777
PO BOX 1778, FALLBROOK, CA 92088-1778
PO BOX 1779, FALLBROOK, CA 92088-1779
PO BOX 1780, FALLBROOK, CA 92088-1780
PO BOX 1781, FALLBROOK, CA 92088-1781
PO BOX 1782, FALLBROOK, CA 92088-1782
PO BOX 1783, FALLBROOK, CA 92088-1783
PO BOX 1784, FALLBROOK, CA 92088-1784
PO BOX 1785, FALLBROOK, CA 92088-1785
PO BOX 1786, FALLBROOK, CA 92088-1786
PO BOX 1787, FALLBROOK, CA 92088-1787
PO BOX 1788, FALLBROOK, CA 92088-1788
PO BOX 1789, FALLBROOK, CA 92088-1789
PO BOX 1790, FALLBROOK, CA 92088-1790
PO BOX 1791, FALLBROOK, CA 92088-1791
PO BOX 1792, FALLBROOK, CA 92088-1792
PO BOX 1793, FALLBROOK, CA 92088-1793
PO BOX 1794, FALLBROOK, CA 92088-1794
PO BOX 1795, FALLBROOK, CA 92088-1795
PO BOX 1796, FALLBROOK, CA 92088-1796
PO BOX 1797, FALLBROOK, CA 92088-1797
PO BOX 1798, FALLBROOK, CA 92088-1798
PO BOX 1799, FALLBROOK, CA 92088-1799
PO BOX 1800, FALLBROOK, CA 92088-1800
PO BOX 1801, FALLBROOK, CA 92088-1801
PO BOX 1802, FALLBROOK, CA 92088-1802
PO BOX 1803, FALLBROOK, CA 92088-1803
PO BOX 1804, FALLBROOK, CA 92088-1804
PO BOX 1805, FALLBROOK, CA 92088-1805
PO BOX 1806, FALLBROOK, CA 92088-1806
PO BOX 1807, FALLBROOK, CA 92088-1807
PO BOX 1808, FALLBROOK, CA 92088-1808
PO BOX 1809, FALLBROOK, CA 92088-1809
PO BOX 1810, FALLBROOK, CA 92088-1810
PO BOX 1811, FALLBROOK, CA 92088-1811
PO BOX 1812, FALLBROOK, CA 92088-1812
PO BOX 1813, FALLBROOK, CA 92088-1813
PO BOX 1814, FALLBROOK, CA 92088-1814
PO BOX 1815, FALLBROOK, CA 92088-1815
PO BOX 1816, FALLBROOK, CA 92088-1816
PO BOX 1817, FALLBROOK, CA 92088-1817
PO BOX 1818, FALLBROOK, CA 92088-1818
PO BOX 1819, FALLBROOK, CA 92088-1819
PO BOX 1820, FALLBROOK, CA 92088-1820
PO BOX 1821, FALLBROOK, CA 92088-1821
PO BOX 1822, FALLBROOK, CA 92088-1822
PO BOX 1823, FALLBROOK, CA 92088-1823
PO BOX 1824, FALLBROOK, CA 92088-1824
PO BOX 1825, FALLBROOK, CA 92088-1825
PO BOX 1826, FALLBROOK, CA 92088-1826
PO BOX 1827, FALLBROOK, CA 92088-1827
PO BOX 1828, FALLBROOK, CA 92088-1828
PO BOX 1829, FALLBROOK, CA 92088-1829
PO BOX 1830, FALLBROOK, CA 92088-1830
PO BOX 1831, FALLBROOK, CA 92088-1831
PO BOX 1832, FALLBROOK, CA 92088-1832
PO BOX 1833, FALLBROOK, CA 92088-1833
PO BOX 1834, FALLBROOK, CA 92088-1834
PO BOX 1835, FALLBROOK, CA 92088-1835
PO BOX 1836, FALLBROOK, CA 92088-1836
PO BOX 1837, FALLBROOK, CA 92088-1837
PO BOX 1838, FALLBROOK, CA 92088-1838
PO BOX 1839, FALLBROOK, CA 92088-1839
PO BOX 1840, FALLBROOK, CA 92088-1840
PO BOX 1841, FALLBROOK, CA 92088-1841
PO BOX 1842, FALLBROOK, CA 92088-1842
PO BOX 1843, FALLBROOK, CA 92088-1843
PO BOX 1844, FALLBROOK, CA 92088-1844
PO BOX 1845, FALLBROOK, CA 92088-1845
PO BOX 1846, FALLBROOK, CA 92088-1846
PO BOX 1847, FALLBROOK, CA 92088-1847
PO BOX 1848, FALLBROOK, CA 92088-1848
PO BOX 1849, FALLBROOK, CA 92088-1849
PO BOX 1850, FALLBROOK, CA 92088-1850
PO BOX 1851, FALLBROOK, CA 92088-1851
PO BOX 1852, FALLBROOK, CA 92088-1852
PO BOX 1853, FALLBROOK, CA 92088-1853
PO BOX 1854, FALLBROOK, CA 92088-1854
PO BOX 1855, FALLBROOK, CA 92088-1855
PO BOX 1856, FALLBROOK, CA 92088-1856
PO BOX 1857, FALLBROOK, CA 92088-1857
PO BOX 1858, FALLBROOK, CA 92088-1858
PO BOX 1859, FALLBROOK, CA 92088-1859
PO BOX 1860, FALLBROOK, CA 92088-1860
PO BOX 1861, FALLBROOK, CA 92088-1861
PO BOX 1862, FALLBROOK, CA 92088-1862
PO BOX 1863, FALLBROOK, CA 92088-1863
PO BOX 1864, FALLBROOK, CA 92088-1864
PO BOX 1865, FALLBROOK, CA 92088-1865
PO BOX 1866, FALLBROOK, CA 92088-1866
PO BOX 1867, FALLBROOK, CA 92088-1867
PO BOX 1868, FALLBROOK, CA 92088-1868
PO BOX 1869, FALLBROOK, CA 92088-1869
PO BOX 1870, FALLBROOK, CA 92088-1870
PO BOX 1871, FALLBROOK, CA 92088-1871
PO BOX 1872, FALLBROOK, CA 92088-1872
PO BOX 1873, FALLBROOK, CA 92088-1873
PO BOX 1874, FALLBROOK, CA 92088-1874
PO BOX 1875, FALLBROOK, CA 92088-1875
PO BOX 1876, FALLBROOK, CA 92088-1876
PO BOX 1877, FALLBROOK, CA 92088-1877
PO BOX 1878, FALLBROOK, CA 92088-1878
PO BOX 1879, FALLBROOK, CA 92088-1879
PO BOX 1880, FALLBROOK, CA 92088-1880
PO BOX 1881, FALLBROOK, CA 92088-1881
PO BOX 1882, FALLBROOK, CA 92088-1882
PO BOX 1883, FALLBROOK, CA 92088-1883
PO BOX 1884, FALLBROOK, CA 92088-1884
PO BOX 1885, FALLBROOK, CA 92088-1885
PO BOX 1886, FALLBROOK, CA 92088-1886
PO BOX 1887, FALLBROOK, CA 92088-1887
PO BOX 1888, FALLBROOK, CA 92088-1888
PO BOX 1889, FALLBROOK, CA 92088-1889
PO BOX 1890, FALLBROOK, CA 92088-1890
PO BOX 1891, FALLBROOK, CA 92088-1891
PO BOX 1892, FALLBROOK, CA 92088-1892
PO BOX 1893, FALLBROOK, CA 92088-1893
PO BOX 1894, FALLBROOK, CA 92088-1894
PO BOX 1895, FALLBROOK, CA 92088-1895
PO BOX 1896, FALLBROOK, CA 92088-1896
PO BOX 1897, FALLBROOK, CA 92088-1897
PO BOX 1898, FALLBROOK, CA 92088-1898
PO BOX 1899, FALLBROOK, CA 92088-1899
PO BOX 1900, FALLBROOK, CA 92088-1900
PO BOX 1901, FALLBROOK, CA 92088-1901
PO BOX 1902, FALLBROOK, CA 92088-1902
PO BOX 1903, FALLBROOK, CA 92088-1903
PO BOX 1904, FALLBROOK, CA 92088-1904
PO BOX 1905, FALLBROOK, CA 92088-1905
PO BOX 1906, FALLBROOK, CA 92088-1906
PO BOX 1907, FALLBROOK, CA 92088-1907
PO BOX 1908, FALLBROOK, CA 92088-1908
PO BOX 1909, FALLBROOK, CA 92088-1909
PO BOX 1910, FALLBROOK, CA 92088-1910
PO BOX 1911, FALLBROOK, CA 92088-1911
PO BOX 1912, FALLBROOK, CA 92088-1912
PO BOX 1913, FALLBROOK, CA 92088-1913
PO BOX 1914, FALLBROOK, CA 92088-1914
PO BOX 1915, FALLBROOK, CA 92088-1915
PO BOX 1916, FALLBROOK, CA 92088-1916
PO BOX 1917, FALLBROOK, CA 92088-1917
PO BOX 1918, FALLBROOK, CA 92088-1918
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