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 921, LAKE WORTH BEACH, FL 33460-0921
PO BOX 922, LAKE WORTH BEACH, FL 33460-0922
PO BOX 923, LAKE WORTH BEACH, FL 33460-0923
PO BOX 924, LAKE WORTH BEACH, FL 33460-0924
PO BOX 925, LAKE WORTH BEACH, FL 33460-0925
PO BOX 926, LAKE WORTH BEACH, FL 33460-0926
PO BOX 927, LAKE WORTH BEACH, FL 33460-0927
PO BOX 928, LAKE WORTH BEACH, FL 33460-0928
PO BOX 929, LAKE WORTH BEACH, FL 33460-0929
PO BOX 930, LAKE WORTH BEACH, FL 33460-0930
PO BOX 931, LAKE WORTH BEACH, FL 33460-0931
PO BOX 932, LAKE WORTH BEACH, FL 33460-0932
PO BOX 933, LAKE WORTH BEACH, FL 33460-0933
PO BOX 934, LAKE WORTH BEACH, FL 33460-0934
PO BOX 935, LAKE WORTH BEACH, FL 33460-0935
PO BOX 936, LAKE WORTH BEACH, FL 33460-0936
PO BOX 937, LAKE WORTH BEACH, FL 33460-0937
PO BOX 938, LAKE WORTH BEACH, FL 33460-0938
PO BOX 939, LAKE WORTH BEACH, FL 33460-0939
PO BOX 940, LAKE WORTH BEACH, FL 33460-0940
PO BOX 941, LAKE WORTH BEACH, FL 33460-0941
PO BOX 942, LAKE WORTH BEACH, FL 33460-0942
PO BOX 943, LAKE WORTH BEACH, FL 33460-0943
PO BOX 944, LAKE WORTH BEACH, FL 33460-0944
PO BOX 945, LAKE WORTH BEACH, FL 33460-0945
PO BOX 946, LAKE WORTH BEACH, FL 33460-0946
PO BOX 947, LAKE WORTH BEACH, FL 33460-0947
PO BOX 948, LAKE WORTH BEACH, FL 33460-0948
PO BOX 949, LAKE WORTH BEACH, FL 33460-0949
PO BOX 950, LAKE WORTH BEACH, FL 33460-0950
PO BOX 951, LAKE WORTH BEACH, FL 33460-0951
PO BOX 952, LAKE WORTH BEACH, FL 33460-0952
PO BOX 953, LAKE WORTH BEACH, FL 33460-0953
PO BOX 954, LAKE WORTH BEACH, FL 33460-0954
PO BOX 955, LAKE WORTH BEACH, FL 33460-0955
PO BOX 956, LAKE WORTH BEACH, FL 33460-0956
PO BOX 957, LAKE WORTH BEACH, FL 33460-0957
PO BOX 958, LAKE WORTH BEACH, FL 33460-0958
PO BOX 959, LAKE WORTH BEACH, FL 33460-0959
PO BOX 960, LAKE WORTH BEACH, FL 33460-0960
PO BOX 961, LAKE WORTH BEACH, FL 33460-0961
PO BOX 962, LAKE WORTH BEACH, FL 33460-0962
PO BOX 963, LAKE WORTH BEACH, FL 33460-0963
PO BOX 964, LAKE WORTH BEACH, FL 33460-0964
PO BOX 965, LAKE WORTH BEACH, FL 33460-0965
PO BOX 966, LAKE WORTH BEACH, FL 33460-0966
PO BOX 967, LAKE WORTH BEACH, FL 33460-0967
PO BOX 968, LAKE WORTH BEACH, FL 33460-0968
PO BOX 969, LAKE WORTH BEACH, FL 33460-0969
PO BOX 970, LAKE WORTH BEACH, FL 33460-0970
PO BOX 971, LAKE WORTH BEACH, FL 33460-0971
PO BOX 972, LAKE WORTH BEACH, FL 33460-0972
PO BOX 973, LAKE WORTH BEACH, FL 33460-0973
PO BOX 974, LAKE WORTH BEACH, FL 33460-0974
PO BOX 975, LAKE WORTH BEACH, FL 33460-0975
PO BOX 976, LAKE WORTH BEACH, FL 33460-0976
PO BOX 977, LAKE WORTH BEACH, FL 33460-0977
PO BOX 978, LAKE WORTH BEACH, FL 33460-0978
PO BOX 979, LAKE WORTH BEACH, FL 33460-0979
PO BOX 980, LAKE WORTH BEACH, FL 33460-0980
PO BOX 981, LAKE WORTH BEACH, FL 33460-0981
PO BOX 982, LAKE WORTH BEACH, FL 33460-0982
PO BOX 983, LAKE WORTH BEACH, FL 33460-0983
PO BOX 984, LAKE WORTH BEACH, FL 33460-0984
PO BOX 985, LAKE WORTH BEACH, FL 33460-0985
PO BOX 986, LAKE WORTH BEACH, FL 33460-0986
PO BOX 987, LAKE WORTH BEACH, FL 33460-0987
PO BOX 988, LAKE WORTH BEACH, FL 33460-0988
PO BOX 989, LAKE WORTH BEACH, FL 33460-0989
PO BOX 990, LAKE WORTH BEACH, FL 33460-0990
PO BOX 991, LAKE WORTH BEACH, FL 33460-0991
PO BOX 992, LAKE WORTH BEACH, FL 33460-0992
PO BOX 993, LAKE WORTH BEACH, FL 33460-0993
PO BOX 994, LAKE WORTH BEACH, FL 33460-0994
PO BOX 995, LAKE WORTH BEACH, FL 33460-0995
PO BOX 996, LAKE WORTH BEACH, FL 33460-0996
PO BOX 997, LAKE WORTH BEACH, FL 33460-0997
PO BOX 998, LAKE WORTH BEACH, FL 33460-0998
PO BOX 999, LAKE WORTH BEACH, FL 33460-0999
PO BOX 1000, LAKE WORTH BEACH, FL 33460-1000
PO BOX 1001, LAKE WORTH BEACH, FL 33460-1001
PO BOX 1002, LAKE WORTH BEACH, FL 33460-1002
PO BOX 1003, LAKE WORTH BEACH, FL 33460-1003
PO BOX 1004, LAKE WORTH BEACH, FL 33460-1004
PO BOX 1005, LAKE WORTH BEACH, FL 33460-1005
PO BOX 1006, LAKE WORTH BEACH, FL 33460-1006
PO BOX 1007, LAKE WORTH BEACH, FL 33460-1007
PO BOX 1008, LAKE WORTH BEACH, FL 33460-1008
PO BOX 1009, LAKE WORTH BEACH, FL 33460-1009
PO BOX 1010, LAKE WORTH BEACH, FL 33460-1010
PO BOX 1011, LAKE WORTH BEACH, FL 33460-1011
PO BOX 1012, LAKE WORTH BEACH, FL 33460-1012
PO BOX 1013, LAKE WORTH BEACH, FL 33460-1013
PO BOX 1014, LAKE WORTH BEACH, FL 33460-1014
PO BOX 1015, LAKE WORTH BEACH, FL 33460-1015
PO BOX 1016, LAKE WORTH BEACH, FL 33460-1016
PO BOX 1017, LAKE WORTH BEACH, FL 33460-1017
PO BOX 1018, LAKE WORTH BEACH, FL 33460-1018
PO BOX 1019, LAKE WORTH BEACH, FL 33460-1019
PO BOX 1020, LAKE WORTH BEACH, FL 33460-1020
PO BOX 1021, LAKE WORTH BEACH, FL 33460-1021
PO BOX 1022, LAKE WORTH BEACH, FL 33460-1022
PO BOX 1023, LAKE WORTH BEACH, FL 33460-1023
PO BOX 1024, LAKE WORTH BEACH, FL 33460-1024
PO BOX 1025, LAKE WORTH BEACH, FL 33460-1025
PO BOX 1026, LAKE WORTH BEACH, FL 33460-1026
PO BOX 1027, LAKE WORTH BEACH, FL 33460-1027
PO BOX 1028, LAKE WORTH BEACH, FL 33460-1028
PO BOX 1029, LAKE WORTH BEACH, FL 33460-1029
PO BOX 1030, LAKE WORTH BEACH, FL 33460-1030
PO BOX 1031, LAKE WORTH BEACH, FL 33460-1031
PO BOX 1032, LAKE WORTH BEACH, FL 33460-1032
PO BOX 1033, LAKE WORTH BEACH, FL 33460-1033
PO BOX 1034, LAKE WORTH BEACH, FL 33460-1034
PO BOX 1035, LAKE WORTH BEACH, FL 33460-1035
PO BOX 1036, LAKE WORTH BEACH, FL 33460-1036
PO BOX 1037, LAKE WORTH BEACH, FL 33460-1037
PO BOX 1038, LAKE WORTH BEACH, FL 33460-1038
PO BOX 1039, LAKE WORTH BEACH, FL 33460-1039
PO BOX 1040, LAKE WORTH BEACH, FL 33460-1040
PO BOX 1041, LAKE WORTH BEACH, FL 33460-1041
PO BOX 1042, LAKE WORTH BEACH, FL 33460-1042
PO BOX 1043, LAKE WORTH BEACH, FL 33460-1043
PO BOX 1044, LAKE WORTH BEACH, FL 33460-1044
PO BOX 1045, LAKE WORTH BEACH, FL 33460-1045
PO BOX 1046, LAKE WORTH BEACH, FL 33460-1046
PO BOX 1047, LAKE WORTH BEACH, FL 33460-1047
PO BOX 1048, LAKE WORTH BEACH, FL 33460-1048
PO BOX 1049, LAKE WORTH BEACH, FL 33460-1049
PO BOX 1050, LAKE WORTH BEACH, FL 33460-1050
PO BOX 1051, LAKE WORTH BEACH, FL 33460-1051
PO BOX 1052, LAKE WORTH BEACH, FL 33460-1052
PO BOX 1053, LAKE WORTH BEACH, FL 33460-1053
PO BOX 1054, LAKE WORTH BEACH, FL 33460-1054
PO BOX 1055, LAKE WORTH BEACH, FL 33460-1055
PO BOX 1056, LAKE WORTH BEACH, FL 33460-1056
PO BOX 1057, LAKE WORTH BEACH, FL 33460-1057
PO BOX 1058, LAKE WORTH BEACH, FL 33460-1058
PO BOX 1059, LAKE WORTH BEACH, FL 33460-1059
PO BOX 1060, LAKE WORTH BEACH, FL 33460-1060
PO BOX 1061, LAKE WORTH BEACH, FL 33460-1061
PO BOX 1062, LAKE WORTH BEACH, FL 33460-1062
PO BOX 1063, LAKE WORTH BEACH, FL 33460-1063
PO BOX 1064, LAKE WORTH BEACH, FL 33460-1064
PO BOX 1065, LAKE WORTH BEACH, FL 33460-1065
PO BOX 1066, LAKE WORTH BEACH, FL 33460-1066
PO BOX 1067, LAKE WORTH BEACH, FL 33460-1067
PO BOX 1068, LAKE WORTH BEACH, FL 33460-1068
PO BOX 1069, LAKE WORTH BEACH, FL 33460-1069
PO BOX 1070, LAKE WORTH BEACH, FL 33460-1070
PO BOX 1071, LAKE WORTH BEACH, FL 33460-1071
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