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 800, GERMANTOWN, MD 20875-0800
PO BOX 801, GERMANTOWN, MD 20875-0801
PO BOX 802, GERMANTOWN, MD 20875-0802
PO BOX 803, GERMANTOWN, MD 20875-0803
PO BOX 804, GERMANTOWN, MD 20875-0804
PO BOX 805, GERMANTOWN, MD 20875-0805
PO BOX 806, GERMANTOWN, MD 20875-0806
PO BOX 807, GERMANTOWN, MD 20875-0807
PO BOX 808, GERMANTOWN, MD 20875-0808
PO BOX 809, GERMANTOWN, MD 20875-0809
PO BOX 810, GERMANTOWN, MD 20875-0810
PO BOX 811, GERMANTOWN, MD 20875-0811
PO BOX 812, GERMANTOWN, MD 20875-0812
PO BOX 813, GERMANTOWN, MD 20875-0813
PO BOX 814, GERMANTOWN, MD 20875-0814
PO BOX 815, GERMANTOWN, MD 20875-0815
PO BOX 816, GERMANTOWN, MD 20875-0816
PO BOX 817, GERMANTOWN, MD 20875-0817
PO BOX 818, GERMANTOWN, MD 20875-0818
PO BOX 819, GERMANTOWN, MD 20875-0819
PO BOX 820, GERMANTOWN, MD 20875-0820
PO BOX 821, GERMANTOWN, MD 20875-0821
PO BOX 822, GERMANTOWN, MD 20875-0822
PO BOX 823, GERMANTOWN, MD 20875-0823
PO BOX 824, GERMANTOWN, MD 20875-0824
PO BOX 825, GERMANTOWN, MD 20875-0825
PO BOX 826, GERMANTOWN, MD 20875-0826
PO BOX 827, GERMANTOWN, MD 20875-0827
PO BOX 828, GERMANTOWN, MD 20875-0828
PO BOX 829, GERMANTOWN, MD 20875-0829
PO BOX 830, GERMANTOWN, MD 20875-0830
PO BOX 831, GERMANTOWN, MD 20875-0831
PO BOX 832, GERMANTOWN, MD 20875-0832
PO BOX 833, GERMANTOWN, MD 20875-0833
PO BOX 834, GERMANTOWN, MD 20875-0834
PO BOX 835, GERMANTOWN, MD 20875-0835
PO BOX 836, GERMANTOWN, MD 20875-0836
PO BOX 837, GERMANTOWN, MD 20875-0837
PO BOX 838, GERMANTOWN, MD 20875-0838
PO BOX 839, GERMANTOWN, MD 20875-0839
PO BOX 840, GERMANTOWN, MD 20875-0840
PO BOX 841, GERMANTOWN, MD 20875-0841
PO BOX 842, GERMANTOWN, MD 20875-0842
PO BOX 843, GERMANTOWN, MD 20875-0843
PO BOX 844, GERMANTOWN, MD 20875-0844
PO BOX 845, GERMANTOWN, MD 20875-0845
PO BOX 846, GERMANTOWN, MD 20875-0846
PO BOX 847, GERMANTOWN, MD 20875-0847
PO BOX 848, GERMANTOWN, MD 20875-0848
PO BOX 849, GERMANTOWN, MD 20875-0849
PO BOX 850, GERMANTOWN, MD 20875-0850
PO BOX 851, GERMANTOWN, MD 20875-0851
PO BOX 852, GERMANTOWN, MD 20875-0852
PO BOX 853, GERMANTOWN, MD 20875-0853
PO BOX 854, GERMANTOWN, MD 20875-0854
PO BOX 855, GERMANTOWN, MD 20875-0855
PO BOX 856, GERMANTOWN, MD 20875-0856
PO BOX 857, GERMANTOWN, MD 20875-0857
PO BOX 858, GERMANTOWN, MD 20875-0858
PO BOX 859, GERMANTOWN, MD 20875-0859
PO BOX 860, GERMANTOWN, MD 20875-0860
PO BOX 861, GERMANTOWN, MD 20875-0861
PO BOX 862, GERMANTOWN, MD 20875-0862
PO BOX 863, GERMANTOWN, MD 20875-0863
PO BOX 864, GERMANTOWN, MD 20875-0864
PO BOX 865, GERMANTOWN, MD 20875-0865
PO BOX 866, GERMANTOWN, MD 20875-0866
PO BOX 867, GERMANTOWN, MD 20875-0867
PO BOX 868, GERMANTOWN, MD 20875-0868
PO BOX 869, GERMANTOWN, MD 20875-0869
PO BOX 870, GERMANTOWN, MD 20875-0870
PO BOX 871, GERMANTOWN, MD 20875-0871
PO BOX 872, GERMANTOWN, MD 20875-0872
PO BOX 873, GERMANTOWN, MD 20875-0873
PO BOX 874, GERMANTOWN, MD 20875-0874
PO BOX 875, GERMANTOWN, MD 20875-0875
PO BOX 876, GERMANTOWN, MD 20875-0876
PO BOX 877, GERMANTOWN, MD 20875-0877
PO BOX 878, GERMANTOWN, MD 20875-0878
PO BOX 879, GERMANTOWN, MD 20875-0879
PO BOX 880, GERMANTOWN, MD 20875-0880
PO BOX 881, GERMANTOWN, MD 20875-0881
PO BOX 882, GERMANTOWN, MD 20875-0882
PO BOX 883, GERMANTOWN, MD 20875-0883
PO BOX 884, GERMANTOWN, MD 20875-0884
PO BOX 885, GERMANTOWN, MD 20875-0885
PO BOX 886, GERMANTOWN, MD 20875-0886
PO BOX 887, GERMANTOWN, MD 20875-0887
PO BOX 888, GERMANTOWN, MD 20875-0888
PO BOX 889, GERMANTOWN, MD 20875-0889
PO BOX 890, GERMANTOWN, MD 20875-0890
PO BOX 891, GERMANTOWN, MD 20875-0891
PO BOX 892, GERMANTOWN, MD 20875-0892
PO BOX 893, GERMANTOWN, MD 20875-0893
PO BOX 894, GERMANTOWN, MD 20875-0894
PO BOX 895, GERMANTOWN, MD 20875-0895
PO BOX 896, GERMANTOWN, MD 20875-0896
PO BOX 897, GERMANTOWN, MD 20875-0897
PO BOX 898, GERMANTOWN, MD 20875-0898
PO BOX 899, GERMANTOWN, MD 20875-0899
PO BOX 900, GERMANTOWN, MD 20875-0900
PO BOX 901, GERMANTOWN, MD 20875-0901
PO BOX 902, GERMANTOWN, MD 20875-0902
PO BOX 903, GERMANTOWN, MD 20875-0903
PO BOX 904, GERMANTOWN, MD 20875-0904
PO BOX 905, GERMANTOWN, MD 20875-0905
PO BOX 906, GERMANTOWN, MD 20875-0906
PO BOX 907, GERMANTOWN, MD 20875-0907
PO BOX 908, GERMANTOWN, MD 20875-0908
PO BOX 909, GERMANTOWN, MD 20875-0909
PO BOX 910, GERMANTOWN, MD 20875-0910
PO BOX 911, GERMANTOWN, MD 20875-0911
PO BOX 912, GERMANTOWN, MD 20875-0912
PO BOX 913, GERMANTOWN, MD 20875-0913
PO BOX 914, GERMANTOWN, MD 20875-0914
PO BOX 915, GERMANTOWN, MD 20875-0915
PO BOX 916, GERMANTOWN, MD 20875-0916
PO BOX 917, GERMANTOWN, MD 20875-0917
PO BOX 918, GERMANTOWN, MD 20875-0918
PO BOX 919, GERMANTOWN, MD 20875-0919
PO BOX 920, GERMANTOWN, MD 20875-0920
PO BOX 921, GERMANTOWN, MD 20875-0921
PO BOX 922, GERMANTOWN, MD 20875-0922
PO BOX 923, GERMANTOWN, MD 20875-0923
PO BOX 924, GERMANTOWN, MD 20875-0924
PO BOX 925, GERMANTOWN, MD 20875-0925
PO BOX 926, GERMANTOWN, MD 20875-0926
PO BOX 927, GERMANTOWN, MD 20875-0927
PO BOX 928, GERMANTOWN, MD 20875-0928
PO BOX 929, GERMANTOWN, MD 20875-0929
PO BOX 930, GERMANTOWN, MD 20875-0930
PO BOX 931, GERMANTOWN, MD 20875-0931
PO BOX 932, GERMANTOWN, MD 20875-0932
PO BOX 933, GERMANTOWN, MD 20875-0933
PO BOX 934, GERMANTOWN, MD 20875-0934
PO BOX 935, GERMANTOWN, MD 20875-0935
PO BOX 936, GERMANTOWN, MD 20875-0936
PO BOX 937, GERMANTOWN, MD 20875-0937
PO BOX 938, GERMANTOWN, MD 20875-0938
PO BOX 939, GERMANTOWN, MD 20875-0939
PO BOX 940, GERMANTOWN, MD 20875-0940
PO BOX 941, GERMANTOWN, MD 20875-0941
PO BOX 942, GERMANTOWN, MD 20875-0942
PO BOX 943, GERMANTOWN, MD 20875-0943
PO BOX 944, GERMANTOWN, MD 20875-0944
PO BOX 945, GERMANTOWN, MD 20875-0945
PO BOX 946, GERMANTOWN, MD 20875-0946
PO BOX 947, GERMANTOWN, MD 20875-0947
PO BOX 948, GERMANTOWN, MD 20875-0948
PO BOX 949, GERMANTOWN, MD 20875-0949
PO BOX 950, GERMANTOWN, MD 20875-0950
PO BOX 951, GERMANTOWN, MD 20875-0951
PO BOX 952, GERMANTOWN, MD 20875-0952
PO BOX 953, GERMANTOWN, MD 20875-0953
PO BOX 954, GERMANTOWN, MD 20875-0954
PO BOX 955, GERMANTOWN, MD 20875-0955
PO BOX 956, GERMANTOWN, MD 20875-0956
PO BOX 957, GERMANTOWN, MD 20875-0957
PO BOX 958, GERMANTOWN, MD 20875-0958
PO BOX 959, GERMANTOWN, MD 20875-0959
PO BOX 960, GERMANTOWN, MD 20875-0960
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