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 4891, LUTHERVILLE TIMONIUM, MD 21094-4891
PO BOX 4892, LUTHERVILLE TIMONIUM, MD 21094-4892
PO BOX 4893, LUTHERVILLE TIMONIUM, MD 21094-4893
PO BOX 4894, LUTHERVILLE TIMONIUM, MD 21094-4894
PO BOX 4895, LUTHERVILLE TIMONIUM, MD 21094-4895
PO BOX 4896, LUTHERVILLE TIMONIUM, MD 21094-4896
PO BOX 4897, LUTHERVILLE TIMONIUM, MD 21094-4897
PO BOX 4898, LUTHERVILLE TIMONIUM, MD 21094-4898
PO BOX 4899, LUTHERVILLE TIMONIUM, MD 21094-4899
PO BOX 4900, LUTHERVILLE TIMONIUM, MD 21094-4900
PO BOX 4901, LUTHERVILLE TIMONIUM, MD 21094-4901
PO BOX 4902, LUTHERVILLE TIMONIUM, MD 21094-4902
PO BOX 4903, LUTHERVILLE TIMONIUM, MD 21094-4903
PO BOX 4904, LUTHERVILLE TIMONIUM, MD 21094-4904
PO BOX 4905, LUTHERVILLE TIMONIUM, MD 21094-4905
PO BOX 4906, LUTHERVILLE TIMONIUM, MD 21094-4906
PO BOX 4907, LUTHERVILLE TIMONIUM, MD 21094-4907
PO BOX 4908, LUTHERVILLE TIMONIUM, MD 21094-4908
PO BOX 4909, LUTHERVILLE TIMONIUM, MD 21094-4909
PO BOX 4910, LUTHERVILLE TIMONIUM, MD 21094-4910
PO BOX 4911, LUTHERVILLE TIMONIUM, MD 21094-4911
PO BOX 4912, LUTHERVILLE TIMONIUM, MD 21094-4912
PO BOX 4913, LUTHERVILLE TIMONIUM, MD 21094-4913
PO BOX 4914, LUTHERVILLE TIMONIUM, MD 21094-4914
PO BOX 4915, LUTHERVILLE TIMONIUM, MD 21094-4915
PO BOX 4916, LUTHERVILLE TIMONIUM, MD 21094-4916
PO BOX 4917, LUTHERVILLE TIMONIUM, MD 21094-4917
PO BOX 4918, LUTHERVILLE TIMONIUM, MD 21094-4918
PO BOX 4919, LUTHERVILLE TIMONIUM, MD 21094-4919
PO BOX 4920, LUTHERVILLE TIMONIUM, MD 21094-4920
PO BOX 4921, LUTHERVILLE TIMONIUM, MD 21094-4921
PO BOX 4922, LUTHERVILLE TIMONIUM, MD 21094-4922
PO BOX 4923, LUTHERVILLE TIMONIUM, MD 21094-4923
PO BOX 4924, LUTHERVILLE TIMONIUM, MD 21094-4924
PO BOX 4925, LUTHERVILLE TIMONIUM, MD 21094-4925
PO BOX 4926, LUTHERVILLE TIMONIUM, MD 21094-4926
PO BOX 4927, LUTHERVILLE TIMONIUM, MD 21094-4927
PO BOX 4928, LUTHERVILLE TIMONIUM, MD 21094-4928
PO BOX 4929, LUTHERVILLE TIMONIUM, MD 21094-4929
PO BOX 4930, LUTHERVILLE TIMONIUM, MD 21094-4930
PO BOX 4931, LUTHERVILLE TIMONIUM, MD 21094-4931
PO BOX 4932, LUTHERVILLE TIMONIUM, MD 21094-4932
PO BOX 4933, LUTHERVILLE TIMONIUM, MD 21094-4933
PO BOX 4934, LUTHERVILLE TIMONIUM, MD 21094-4934
PO BOX 4935, LUTHERVILLE TIMONIUM, MD 21094-4935
PO BOX 4936, LUTHERVILLE TIMONIUM, MD 21094-4936
PO BOX 4937, LUTHERVILLE TIMONIUM, MD 21094-4937
PO BOX 4938, LUTHERVILLE TIMONIUM, MD 21094-4938
PO BOX 4939, LUTHERVILLE TIMONIUM, MD 21094-4939
PO BOX 4940, LUTHERVILLE TIMONIUM, MD 21094-4940
PO BOX 4941, LUTHERVILLE TIMONIUM, MD 21094-4941
PO BOX 4942, LUTHERVILLE TIMONIUM, MD 21094-4942
PO BOX 4943, LUTHERVILLE TIMONIUM, MD 21094-4943
PO BOX 4944, LUTHERVILLE TIMONIUM, MD 21094-4944
PO BOX 4945, LUTHERVILLE TIMONIUM, MD 21094-4945
PO BOX 4946, LUTHERVILLE TIMONIUM, MD 21094-4946
PO BOX 4947, LUTHERVILLE TIMONIUM, MD 21094-4947
PO BOX 4948, LUTHERVILLE TIMONIUM, MD 21094-4948
PO BOX 4949, LUTHERVILLE TIMONIUM, MD 21094-4949
PO BOX 4950, LUTHERVILLE TIMONIUM, MD 21094-4950
PO BOX 4951, LUTHERVILLE TIMONIUM, MD 21094-4951
PO BOX 4952, LUTHERVILLE TIMONIUM, MD 21094-4952
PO BOX 4953, LUTHERVILLE TIMONIUM, MD 21094-4953
PO BOX 4954, LUTHERVILLE TIMONIUM, MD 21094-4954
PO BOX 4955, LUTHERVILLE TIMONIUM, MD 21094-4955
PO BOX 4956, LUTHERVILLE TIMONIUM, MD 21094-4956
PO BOX 4957, LUTHERVILLE TIMONIUM, MD 21094-4957
PO BOX 4958, LUTHERVILLE TIMONIUM, MD 21094-4958
PO BOX 4959, LUTHERVILLE TIMONIUM, MD 21094-4959
PO BOX 4960, LUTHERVILLE TIMONIUM, MD 21094-4960
PO BOX 4961, LUTHERVILLE TIMONIUM, MD 21094-4961
PO BOX 4962, LUTHERVILLE TIMONIUM, MD 21094-4962
PO BOX 4963, LUTHERVILLE TIMONIUM, MD 21094-4963
PO BOX 4964, LUTHERVILLE TIMONIUM, MD 21094-4964
PO BOX 4965, LUTHERVILLE TIMONIUM, MD 21094-4965
PO BOX 4966, LUTHERVILLE TIMONIUM, MD 21094-4966
PO BOX 4967, LUTHERVILLE TIMONIUM, MD 21094-4967
PO BOX 4968, LUTHERVILLE TIMONIUM, MD 21094-4968
PO BOX 4969, LUTHERVILLE TIMONIUM, MD 21094-4969
PO BOX 4970, LUTHERVILLE TIMONIUM, MD 21094-4970
PO BOX 4971, LUTHERVILLE TIMONIUM, MD 21094-4971
PO BOX 4972, LUTHERVILLE TIMONIUM, MD 21094-4972
PO BOX 4973, LUTHERVILLE TIMONIUM, MD 21094-4973
PO BOX 4974, LUTHERVILLE TIMONIUM, MD 21094-4974
PO BOX 4975, LUTHERVILLE TIMONIUM, MD 21094-4975
PO BOX 4976, LUTHERVILLE TIMONIUM, MD 21094-4976
PO BOX 4977, LUTHERVILLE TIMONIUM, MD 21094-4977
PO BOX 4978, LUTHERVILLE TIMONIUM, MD 21094-4978
PO BOX 4979, LUTHERVILLE TIMONIUM, MD 21094-4979
PO BOX 4980, LUTHERVILLE TIMONIUM, MD 21094-4980
PO BOX 4981, LUTHERVILLE TIMONIUM, MD 21094-4981
PO BOX 4982, LUTHERVILLE TIMONIUM, MD 21094-4982
PO BOX 4983, LUTHERVILLE TIMONIUM, MD 21094-4983
PO BOX 4984, LUTHERVILLE TIMONIUM, MD 21094-4984
PO BOX 4985, LUTHERVILLE TIMONIUM, MD 21094-4985
PO BOX 4986, LUTHERVILLE TIMONIUM, MD 21094-4986
PO BOX 4987, LUTHERVILLE TIMONIUM, MD 21094-4987
PO BOX 4988, LUTHERVILLE TIMONIUM, MD 21094-4988
PO BOX 4989, LUTHERVILLE TIMONIUM, MD 21094-4989
PO BOX 4990, LUTHERVILLE TIMONIUM, MD 21094-4990
PO BOX 4991, LUTHERVILLE TIMONIUM, MD 21094-4991
PO BOX 4992, LUTHERVILLE TIMONIUM, MD 21094-4992
PO BOX 4993, LUTHERVILLE TIMONIUM, MD 21094-4993
PO BOX 4994, LUTHERVILLE TIMONIUM, MD 21094-4994
PO BOX 4995, LUTHERVILLE TIMONIUM, MD 21094-4995
PO BOX 4996, LUTHERVILLE TIMONIUM, MD 21094-4996
PO BOX 4997, LUTHERVILLE TIMONIUM, MD 21094-4997
PO BOX 4998, LUTHERVILLE TIMONIUM, MD 21094-4998
PO BOX 4999, LUTHERVILLE TIMONIUM, MD 21094-4999
PO BOX 5000, LUTHERVILLE TIMONIUM, MD 21094-5000
PO BOX 5001, LUTHERVILLE TIMONIUM, MD 21094-5001
PO BOX 5002, LUTHERVILLE TIMONIUM, MD 21094-5002
PO BOX 5003, LUTHERVILLE TIMONIUM, MD 21094-5003
PO BOX 5004, LUTHERVILLE TIMONIUM, MD 21094-5004
PO BOX 5005, LUTHERVILLE TIMONIUM, MD 21094-5005
PO BOX 5006, LUTHERVILLE TIMONIUM, MD 21094-5006
PO BOX 5007, LUTHERVILLE TIMONIUM, MD 21094-5007
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