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 5851, LUTHERVILLE TIMONIUM, MD 21094-5851
PO BOX 5852, LUTHERVILLE TIMONIUM, MD 21094-5852
PO BOX 5853, LUTHERVILLE TIMONIUM, MD 21094-5853
PO BOX 5854, LUTHERVILLE TIMONIUM, MD 21094-5854
PO BOX 5855, LUTHERVILLE TIMONIUM, MD 21094-5855
PO BOX 5856, LUTHERVILLE TIMONIUM, MD 21094-5856
PO BOX 5857, LUTHERVILLE TIMONIUM, MD 21094-5857
PO BOX 5858, LUTHERVILLE TIMONIUM, MD 21094-5858
PO BOX 5859, LUTHERVILLE TIMONIUM, MD 21094-5859
PO BOX 5860, LUTHERVILLE TIMONIUM, MD 21094-5860
PO BOX 5861, LUTHERVILLE TIMONIUM, MD 21094-5861
PO BOX 5862, LUTHERVILLE TIMONIUM, MD 21094-5862
PO BOX 5863, LUTHERVILLE TIMONIUM, MD 21094-5863
PO BOX 5864, LUTHERVILLE TIMONIUM, MD 21094-5864
PO BOX 5865, LUTHERVILLE TIMONIUM, MD 21094-5865
PO BOX 5866, LUTHERVILLE TIMONIUM, MD 21094-5866
PO BOX 5867, LUTHERVILLE TIMONIUM, MD 21094-5867
PO BOX 5868, LUTHERVILLE TIMONIUM, MD 21094-5868
PO BOX 5869, LUTHERVILLE TIMONIUM, MD 21094-5869
PO BOX 5870, LUTHERVILLE TIMONIUM, MD 21094-5870
PO BOX 5871, LUTHERVILLE TIMONIUM, MD 21094-5871
PO BOX 5872, LUTHERVILLE TIMONIUM, MD 21094-5872
PO BOX 5873, LUTHERVILLE TIMONIUM, MD 21094-5873
PO BOX 5874, LUTHERVILLE TIMONIUM, MD 21094-5874
PO BOX 5875, LUTHERVILLE TIMONIUM, MD 21094-5875
PO BOX 5876, LUTHERVILLE TIMONIUM, MD 21094-5876
PO BOX 5877, LUTHERVILLE TIMONIUM, MD 21094-5877
PO BOX 5878, LUTHERVILLE TIMONIUM, MD 21094-5878
PO BOX 5879, LUTHERVILLE TIMONIUM, MD 21094-5879
PO BOX 5880, LUTHERVILLE TIMONIUM, MD 21094-5880
PO BOX 5881, LUTHERVILLE TIMONIUM, MD 21094-5881
PO BOX 5882, LUTHERVILLE TIMONIUM, MD 21094-5882
PO BOX 5883, LUTHERVILLE TIMONIUM, MD 21094-5883
PO BOX 5884, LUTHERVILLE TIMONIUM, MD 21094-5884
PO BOX 5885, LUTHERVILLE TIMONIUM, MD 21094-5885
PO BOX 5886, LUTHERVILLE TIMONIUM, MD 21094-5886
PO BOX 5887, LUTHERVILLE TIMONIUM, MD 21094-5887
PO BOX 5888, LUTHERVILLE TIMONIUM, MD 21094-5888
PO BOX 5889, LUTHERVILLE TIMONIUM, MD 21094-5889
PO BOX 5890, LUTHERVILLE TIMONIUM, MD 21094-5890
PO BOX 5891, LUTHERVILLE TIMONIUM, MD 21094-5891
PO BOX 5892, LUTHERVILLE TIMONIUM, MD 21094-5892
PO BOX 5893, LUTHERVILLE TIMONIUM, MD 21094-5893
PO BOX 5894, LUTHERVILLE TIMONIUM, MD 21094-5894
PO BOX 5895, LUTHERVILLE TIMONIUM, MD 21094-5895
PO BOX 5896, LUTHERVILLE TIMONIUM, MD 21094-5896
PO BOX 5897, LUTHERVILLE TIMONIUM, MD 21094-5897
PO BOX 5898, LUTHERVILLE TIMONIUM, MD 21094-5898
PO BOX 5899, LUTHERVILLE TIMONIUM, MD 21094-5899
PO BOX 5900, LUTHERVILLE TIMONIUM, MD 21094-5900
PO BOX 5901, LUTHERVILLE TIMONIUM, MD 21094-5901
PO BOX 5902, LUTHERVILLE TIMONIUM, MD 21094-5902
PO BOX 5903, LUTHERVILLE TIMONIUM, MD 21094-5903
PO BOX 5904, LUTHERVILLE TIMONIUM, MD 21094-5904
PO BOX 5905, LUTHERVILLE TIMONIUM, MD 21094-5905
PO BOX 5906, LUTHERVILLE TIMONIUM, MD 21094-5906
PO BOX 5907, LUTHERVILLE TIMONIUM, MD 21094-5907
PO BOX 5908, LUTHERVILLE TIMONIUM, MD 21094-5908
PO BOX 5909, LUTHERVILLE TIMONIUM, MD 21094-5909
PO BOX 5910, LUTHERVILLE TIMONIUM, MD 21094-5910
PO BOX 5911, LUTHERVILLE TIMONIUM, MD 21094-5911
PO BOX 5912, LUTHERVILLE TIMONIUM, MD 21094-5912
PO BOX 5913, LUTHERVILLE TIMONIUM, MD 21094-5913
PO BOX 5914, LUTHERVILLE TIMONIUM, MD 21094-5914
PO BOX 5915, LUTHERVILLE TIMONIUM, MD 21094-5915
PO BOX 5916, LUTHERVILLE TIMONIUM, MD 21094-5916
PO BOX 5917, LUTHERVILLE TIMONIUM, MD 21094-5917
PO BOX 5918, LUTHERVILLE TIMONIUM, MD 21094-5918
PO BOX 5919, LUTHERVILLE TIMONIUM, MD 21094-5919
PO BOX 5920, LUTHERVILLE TIMONIUM, MD 21094-5920
PO BOX 5921, LUTHERVILLE TIMONIUM, MD 21094-5921
PO BOX 5922, LUTHERVILLE TIMONIUM, MD 21094-5922
PO BOX 5923, LUTHERVILLE TIMONIUM, MD 21094-5923
PO BOX 5924, LUTHERVILLE TIMONIUM, MD 21094-5924
PO BOX 5925, LUTHERVILLE TIMONIUM, MD 21094-5925
PO BOX 5926, LUTHERVILLE TIMONIUM, MD 21094-5926
PO BOX 5927, LUTHERVILLE TIMONIUM, MD 21094-5927
PO BOX 5928, LUTHERVILLE TIMONIUM, MD 21094-5928
PO BOX 5929, LUTHERVILLE TIMONIUM, MD 21094-5929
PO BOX 5930, LUTHERVILLE TIMONIUM, MD 21094-5930
PO BOX 5931, LUTHERVILLE TIMONIUM, MD 21094-5931
PO BOX 5932, LUTHERVILLE TIMONIUM, MD 21094-5932
PO BOX 5933, LUTHERVILLE TIMONIUM, MD 21094-5933
PO BOX 5934, LUTHERVILLE TIMONIUM, MD 21094-5934
PO BOX 5935, LUTHERVILLE TIMONIUM, MD 21094-5935
PO BOX 5936, LUTHERVILLE TIMONIUM, MD 21094-5936
PO BOX 5937, LUTHERVILLE TIMONIUM, MD 21094-5937
PO BOX 5938, LUTHERVILLE TIMONIUM, MD 21094-5938
PO BOX 5939, LUTHERVILLE TIMONIUM, MD 21094-5939
PO BOX 5940, LUTHERVILLE TIMONIUM, MD 21094-5940
PO BOX 5941, LUTHERVILLE TIMONIUM, MD 21094-5941
PO BOX 5942, LUTHERVILLE TIMONIUM, MD 21094-5942
PO BOX 5943, LUTHERVILLE TIMONIUM, MD 21094-5943
PO BOX 5944, LUTHERVILLE TIMONIUM, MD 21094-5944
PO BOX 5945, LUTHERVILLE TIMONIUM, MD 21094-5945
PO BOX 5946, LUTHERVILLE TIMONIUM, MD 21094-5946
PO BOX 5947, LUTHERVILLE TIMONIUM, MD 21094-5947
PO BOX 5948, LUTHERVILLE TIMONIUM, MD 21094-5948
PO BOX 5949, LUTHERVILLE TIMONIUM, MD 21094-5949
PO BOX 5950, LUTHERVILLE TIMONIUM, MD 21094-5950
PO BOX 5951, LUTHERVILLE TIMONIUM, MD 21094-5951
PO BOX 5952, LUTHERVILLE TIMONIUM, MD 21094-5952
PO BOX 5953, LUTHERVILLE TIMONIUM, MD 21094-5953
PO BOX 5954, LUTHERVILLE TIMONIUM, MD 21094-5954
PO BOX 5955, LUTHERVILLE TIMONIUM, MD 21094-5955
PO BOX 5956, LUTHERVILLE TIMONIUM, MD 21094-5956
PO BOX 5957, LUTHERVILLE TIMONIUM, MD 21094-5957
PO BOX 5958, LUTHERVILLE TIMONIUM, MD 21094-5958
PO BOX 5959, LUTHERVILLE TIMONIUM, MD 21094-5959
PO BOX 5960, LUTHERVILLE TIMONIUM, MD 21094-5960
PO BOX 5961, LUTHERVILLE TIMONIUM, MD 21094-5961
PO BOX 5962, LUTHERVILLE TIMONIUM, MD 21094-5962
PO BOX 5963, LUTHERVILLE TIMONIUM, MD 21094-5963
PO BOX 5964, LUTHERVILLE TIMONIUM, MD 21094-5964
PO BOX 5965, LUTHERVILLE TIMONIUM, MD 21094-5965
PO BOX 5966, LUTHERVILLE TIMONIUM, MD 21094-5966
PO BOX 5967, LUTHERVILLE TIMONIUM, MD 21094-5967
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