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 10901, SPRINGFIELD, MO 65808-0901
PO BOX 10902, SPRINGFIELD, MO 65808-0902
PO BOX 10903, SPRINGFIELD, MO 65808-0903
PO BOX 10904, SPRINGFIELD, MO 65808-0904
PO BOX 10905, SPRINGFIELD, MO 65808-0905
PO BOX 10906, SPRINGFIELD, MO 65808-0906
PO BOX 10907, SPRINGFIELD, MO 65808-0907
PO BOX 10908, SPRINGFIELD, MO 65808-0908
PO BOX 10909, SPRINGFIELD, MO 65808-0909
PO BOX 10910, SPRINGFIELD, MO 65808-0910
PO BOX 10911, SPRINGFIELD, MO 65808-0911
PO BOX 10912, SPRINGFIELD, MO 65808-0912
PO BOX 10913, SPRINGFIELD, MO 65808-0913
PO BOX 10914, SPRINGFIELD, MO 65808-0914
PO BOX 10915, SPRINGFIELD, MO 65808-0915
PO BOX 10916, SPRINGFIELD, MO 65808-0916
PO BOX 10917, SPRINGFIELD, MO 65808-0917
PO BOX 10918, SPRINGFIELD, MO 65808-0918
PO BOX 10919, SPRINGFIELD, MO 65808-0919
PO BOX 10920, SPRINGFIELD, MO 65808-0920
PO BOX 10921, SPRINGFIELD, MO 65808-0921
PO BOX 10922, SPRINGFIELD, MO 65808-0922
PO BOX 10923, SPRINGFIELD, MO 65808-0923
PO BOX 10924, SPRINGFIELD, MO 65808-0924
PO BOX 10925, SPRINGFIELD, MO 65808-0925
PO BOX 10926, SPRINGFIELD, MO 65808-0926
PO BOX 10927, SPRINGFIELD, MO 65808-0927
PO BOX 10928, SPRINGFIELD, MO 65808-0928
PO BOX 10929, SPRINGFIELD, MO 65808-0929
PO BOX 10930, SPRINGFIELD, MO 65808-0930
PO BOX 10931, SPRINGFIELD, MO 65808-0931
PO BOX 10932, SPRINGFIELD, MO 65808-0932
PO BOX 10933, SPRINGFIELD, MO 65808-0933
PO BOX 10934, SPRINGFIELD, MO 65808-0934
PO BOX 10935, SPRINGFIELD, MO 65808-0935
PO BOX 10936, SPRINGFIELD, MO 65808-0936
PO BOX 10937, SPRINGFIELD, MO 65808-0937
PO BOX 10938, SPRINGFIELD, MO 65808-0938
PO BOX 10939, SPRINGFIELD, MO 65808-0939
PO BOX 10940, SPRINGFIELD, MO 65808-0940
PO BOX 10941, SPRINGFIELD, MO 65808-0941
PO BOX 10942, SPRINGFIELD, MO 65808-0942
PO BOX 10943, SPRINGFIELD, MO 65808-0943
PO BOX 10944, SPRINGFIELD, MO 65808-0944
PO BOX 10945, SPRINGFIELD, MO 65808-0945
PO BOX 10946, SPRINGFIELD, MO 65808-0946
PO BOX 10947, SPRINGFIELD, MO 65808-0947
PO BOX 10948, SPRINGFIELD, MO 65808-0948
PO BOX 10949, SPRINGFIELD, MO 65808-0949
PO BOX 10950, SPRINGFIELD, MO 65808-0950
PO BOX 10951, SPRINGFIELD, MO 65808-0951
PO BOX 10952, SPRINGFIELD, MO 65808-0952
PO BOX 10953, SPRINGFIELD, MO 65808-0953
PO BOX 10954, SPRINGFIELD, MO 65808-0954
PO BOX 10955, SPRINGFIELD, MO 65808-0955
PO BOX 10956, SPRINGFIELD, MO 65808-0956
PO BOX 10957, SPRINGFIELD, MO 65808-0957
PO BOX 10958, SPRINGFIELD, MO 65808-0958
PO BOX 10959, SPRINGFIELD, MO 65808-0959
PO BOX 10960, SPRINGFIELD, MO 65808-0960
PO BOX 10961, SPRINGFIELD, MO 65808-0961
PO BOX 10962, SPRINGFIELD, MO 65808-0962
PO BOX 10963, SPRINGFIELD, MO 65808-0963
PO BOX 10964, SPRINGFIELD, MO 65808-0964
PO BOX 10965, SPRINGFIELD, MO 65808-0965
PO BOX 10966, SPRINGFIELD, MO 65808-0966
PO BOX 10967, SPRINGFIELD, MO 65808-0967
PO BOX 10968, SPRINGFIELD, MO 65808-0968
PO BOX 10969, SPRINGFIELD, MO 65808-0969
PO BOX 10970, SPRINGFIELD, MO 65808-0970
PO BOX 10971, SPRINGFIELD, MO 65808-0971
PO BOX 10972, SPRINGFIELD, MO 65808-0972
PO BOX 10973, SPRINGFIELD, MO 65808-0973
PO BOX 10974, SPRINGFIELD, MO 65808-0974
PO BOX 10975, SPRINGFIELD, MO 65808-0975
PO BOX 10976, SPRINGFIELD, MO 65808-0976
PO BOX 10977, SPRINGFIELD, MO 65808-0977
PO BOX 10978, SPRINGFIELD, MO 65808-0978
PO BOX 10979, SPRINGFIELD, MO 65808-0979
PO BOX 10980, SPRINGFIELD, MO 65808-0980
PO BOX 10981, SPRINGFIELD, MO 65808-0981
PO BOX 10982, SPRINGFIELD, MO 65808-0982
PO BOX 10983, SPRINGFIELD, MO 65808-0983
PO BOX 10984, SPRINGFIELD, MO 65808-0984
PO BOX 10985, SPRINGFIELD, MO 65808-0985
PO BOX 10986, SPRINGFIELD, MO 65808-0986
PO BOX 10987, SPRINGFIELD, MO 65808-0987
PO BOX 10988, SPRINGFIELD, MO 65808-0988
PO BOX 10989, SPRINGFIELD, MO 65808-0989
PO BOX 10990, SPRINGFIELD, MO 65808-0990
PO BOX 10991, SPRINGFIELD, MO 65808-0991
PO BOX 10992, SPRINGFIELD, MO 65808-0992
PO BOX 10993, SPRINGFIELD, MO 65808-0993
PO BOX 10994, SPRINGFIELD, MO 65808-0994
PO BOX 10995, SPRINGFIELD, MO 65808-0995
PO BOX 10996, SPRINGFIELD, MO 65808-0996
PO BOX 10997, SPRINGFIELD, MO 65808-0997
PO BOX 10998, SPRINGFIELD, MO 65808-0998
PO BOX 10999, SPRINGFIELD, MO 65808-0999
PO BOX 11000, SPRINGFIELD, MO 65808-1000
PO BOX 11001, SPRINGFIELD, MO 65808-1001
PO BOX 11002, SPRINGFIELD, MO 65808-1002
PO BOX 11003, SPRINGFIELD, MO 65808-1003
PO BOX 11004, SPRINGFIELD, MO 65808-1004
PO BOX 11005, SPRINGFIELD, MO 65808-1005
PO BOX 11006, SPRINGFIELD, MO 65808-1006
PO BOX 11007, SPRINGFIELD, MO 65808-1007
PO BOX 11008, SPRINGFIELD, MO 65808-1008
PO BOX 11009, SPRINGFIELD, MO 65808-1009
PO BOX 11010, SPRINGFIELD, MO 65808-1010
PO BOX 11011, SPRINGFIELD, MO 65808-1011
PO BOX 11012, SPRINGFIELD, MO 65808-1012
PO BOX 11013, SPRINGFIELD, MO 65808-1013
PO BOX 11014, SPRINGFIELD, MO 65808-1014
PO BOX 11015, SPRINGFIELD, MO 65808-1015
PO BOX 11016, SPRINGFIELD, MO 65808-1016
PO BOX 11017, SPRINGFIELD, MO 65808-1017
PO BOX 11018, SPRINGFIELD, MO 65808-1018
PO BOX 11019, SPRINGFIELD, MO 65808-1019
PO BOX 11020, SPRINGFIELD, MO 65808-1020
PO BOX 11021, SPRINGFIELD, MO 65808-1021
PO BOX 11022, SPRINGFIELD, MO 65808-1022
PO BOX 11023, SPRINGFIELD, MO 65808-1023
PO BOX 11024, SPRINGFIELD, MO 65808-1024
PO BOX 11025, SPRINGFIELD, MO 65808-1025
PO BOX 11026, SPRINGFIELD, MO 65808-1026
PO BOX 11027, SPRINGFIELD, MO 65808-1027
PO BOX 11028, SPRINGFIELD, MO 65808-1028
PO BOX 11029, SPRINGFIELD, MO 65808-1029
PO BOX 11030, SPRINGFIELD, MO 65808-1030
PO BOX 11031, SPRINGFIELD, MO 65808-1031
PO BOX 11032, SPRINGFIELD, MO 65808-1032
PO BOX 11033, SPRINGFIELD, MO 65808-1033
PO BOX 11034, SPRINGFIELD, MO 65808-1034
PO BOX 11035, SPRINGFIELD, MO 65808-1035
PO BOX 11036, SPRINGFIELD, MO 65808-1036
PO BOX 11037, SPRINGFIELD, MO 65808-1037
PO BOX 11038, SPRINGFIELD, MO 65808-1038
PO BOX 11039, SPRINGFIELD, MO 65808-1039
PO BOX 11040, SPRINGFIELD, MO 65808-1040
PO BOX 11041, SPRINGFIELD, MO 65808-1041
PO BOX 11042, SPRINGFIELD, MO 65808-1042
PO BOX 11043, SPRINGFIELD, MO 65808-1043
PO BOX 11044, SPRINGFIELD, MO 65808-1044
PO BOX 11045, SPRINGFIELD, MO 65808-1045
PO BOX 11046, SPRINGFIELD, MO 65808-1046
PO BOX 11047, SPRINGFIELD, MO 65808-1047
PO BOX 11048, SPRINGFIELD, MO 65808-1048
PO BOX 11049, SPRINGFIELD, MO 65808-1049
PO BOX 11050, SPRINGFIELD, MO 65808-1050
PO BOX 11051, SPRINGFIELD, MO 65808-1051
PO BOX 11052, SPRINGFIELD, MO 65808-1052
PO BOX 11053, SPRINGFIELD, MO 65808-1053
PO BOX 11054, SPRINGFIELD, MO 65808-1054
PO BOX 11055, SPRINGFIELD, MO 65808-1055
PO BOX 11056, SPRINGFIELD, MO 65808-1056
PO BOX 11057, SPRINGFIELD, MO 65808-1057
PO BOX 11058, SPRINGFIELD, MO 65808-1058
PO BOX 11059, SPRINGFIELD, MO 65808-1059
PO BOX 11060, SPRINGFIELD, MO 65808-1060
PO BOX 11061, SPRINGFIELD, MO 65808-1061
PO BOX 11062, SPRINGFIELD, MO 65808-1062
PO BOX 11063, SPRINGFIELD, MO 65808-1063
PO BOX 11064, SPRINGFIELD, MO 65808-1064
PO BOX 11065, SPRINGFIELD, MO 65808-1065
PO BOX 11066, SPRINGFIELD, MO 65808-1066
PO BOX 11067, SPRINGFIELD, MO 65808-1067
PO BOX 11068, SPRINGFIELD, MO 65808-1068
PO BOX 11069, SPRINGFIELD, MO 65808-1069
PO BOX 11070, SPRINGFIELD, MO 65808-1070
PO BOX 11071, SPRINGFIELD, MO 65808-1071
PO BOX 11072, SPRINGFIELD, MO 65808-1072
PO BOX 11073, SPRINGFIELD, MO 65808-1073
PO BOX 11074, SPRINGFIELD, MO 65808-1074
PO BOX 11075, SPRINGFIELD, MO 65808-1075
PO BOX 11076, SPRINGFIELD, MO 65808-1076
PO BOX 11077, SPRINGFIELD, MO 65808-1077
PO BOX 11078, SPRINGFIELD, MO 65808-1078
PO BOX 11079, SPRINGFIELD, MO 65808-1079
PO BOX 11080, SPRINGFIELD, MO 65808-1080
PO BOX 11081, SPRINGFIELD, MO 65808-1081
PO BOX 11082, SPRINGFIELD, MO 65808-1082
PO BOX 11083, SPRINGFIELD, MO 65808-1083
PO BOX 11084, SPRINGFIELD, MO 65808-1084
PO BOX 11085, SPRINGFIELD, MO 65808-1085
PO BOX 11086, SPRINGFIELD, MO 65808-1086
PO BOX 11087, SPRINGFIELD, MO 65808-1087
PO BOX 11088, SPRINGFIELD, MO 65808-1088
PO BOX 11089, SPRINGFIELD, MO 65808-1089
PO BOX 11090, SPRINGFIELD, MO 65808-1090
PO BOX 11091, SPRINGFIELD, MO 65808-1091
PO BOX 11092, SPRINGFIELD, MO 65808-1092
PO BOX 11093, SPRINGFIELD, MO 65808-1093
PO BOX 11094, SPRINGFIELD, MO 65808-1094
PO BOX 11095, SPRINGFIELD, MO 65808-1095
PO BOX 11096, SPRINGFIELD, MO 65808-1096
PO BOX 11097, SPRINGFIELD, MO 65808-1097
PO BOX 11098, SPRINGFIELD, MO 65808-1098
PO BOX 11099, SPRINGFIELD, MO 65808-1099
PO BOX 11100, SPRINGFIELD, MO 65808-1100
PO BOX 11101, SPRINGFIELD, MO 65808-1101
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