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 941, PALMER LAKE, CO 80133-0941
PO BOX 942, PALMER LAKE, CO 80133-0942
PO BOX 943, PALMER LAKE, CO 80133-0943
PO BOX 944, PALMER LAKE, CO 80133-0944
PO BOX 945, PALMER LAKE, CO 80133-0945
PO BOX 946, PALMER LAKE, CO 80133-0946
PO BOX 947, PALMER LAKE, CO 80133-0947
PO BOX 948, PALMER LAKE, CO 80133-0948
PO BOX 949, PALMER LAKE, CO 80133-0949
PO BOX 950, PALMER LAKE, CO 80133-0950
PO BOX 951, PALMER LAKE, CO 80133-0951
PO BOX 952, PALMER LAKE, CO 80133-0952
PO BOX 953, PALMER LAKE, CO 80133-0953
PO BOX 954, PALMER LAKE, CO 80133-0954
PO BOX 955, PALMER LAKE, CO 80133-0955
PO BOX 956, PALMER LAKE, CO 80133-0956
PO BOX 957, PALMER LAKE, CO 80133-0957
PO BOX 958, PALMER LAKE, CO 80133-0958
PO BOX 959, PALMER LAKE, CO 80133-0959
PO BOX 960, PALMER LAKE, CO 80133-0960
PO BOX 961, PALMER LAKE, CO 80133-0961
PO BOX 962, PALMER LAKE, CO 80133-0962
PO BOX 963, PALMER LAKE, CO 80133-0963
PO BOX 964, PALMER LAKE, CO 80133-0964
PO BOX 965, PALMER LAKE, CO 80133-0965
PO BOX 966, PALMER LAKE, CO 80133-0966
PO BOX 967, PALMER LAKE, CO 80133-0967
PO BOX 968, PALMER LAKE, CO 80133-0968
PO BOX 969, PALMER LAKE, CO 80133-0969
PO BOX 970, PALMER LAKE, CO 80133-0970
PO BOX 971, PALMER LAKE, CO 80133-0971
PO BOX 972, PALMER LAKE, CO 80133-0972
PO BOX 973, PALMER LAKE, CO 80133-0973
PO BOX 974, PALMER LAKE, CO 80133-0974
PO BOX 975, PALMER LAKE, CO 80133-0975
PO BOX 976, PALMER LAKE, CO 80133-0976
PO BOX 977, PALMER LAKE, CO 80133-0977
PO BOX 978, PALMER LAKE, CO 80133-0978
PO BOX 979, PALMER LAKE, CO 80133-0979
PO BOX 980, PALMER LAKE, CO 80133-0980
PO BOX 981, PALMER LAKE, CO 80133-0981
PO BOX 982, PALMER LAKE, CO 80133-0982
PO BOX 983, PALMER LAKE, CO 80133-0983
PO BOX 984, PALMER LAKE, CO 80133-0984
PO BOX 985, PALMER LAKE, CO 80133-0985
PO BOX 986, PALMER LAKE, CO 80133-0986
PO BOX 987, PALMER LAKE, CO 80133-0987
PO BOX 988, PALMER LAKE, CO 80133-0988
PO BOX 989, PALMER LAKE, CO 80133-0989
PO BOX 990, PALMER LAKE, CO 80133-0990
PO BOX 991, PALMER LAKE, CO 80133-0991
PO BOX 992, PALMER LAKE, CO 80133-0992
PO BOX 993, PALMER LAKE, CO 80133-0993
PO BOX 994, PALMER LAKE, CO 80133-0994
PO BOX 995, PALMER LAKE, CO 80133-0995
PO BOX 996, PALMER LAKE, CO 80133-0996
PO BOX 997, PALMER LAKE, CO 80133-0997
PO BOX 998, PALMER LAKE, CO 80133-0998
PO BOX 999, PALMER LAKE, CO 80133-0999
PO BOX 1000, PALMER LAKE, CO 80133-1000
PO BOX 1001, PALMER LAKE, CO 80133-1001
PO BOX 1002, PALMER LAKE, CO 80133-1002
PO BOX 1003, PALMER LAKE, CO 80133-1003
PO BOX 1004, PALMER LAKE, CO 80133-1004
PO BOX 1005, PALMER LAKE, CO 80133-1005
PO BOX 1006, PALMER LAKE, CO 80133-1006
PO BOX 1007, PALMER LAKE, CO 80133-1007
PO BOX 1008, PALMER LAKE, CO 80133-1008
PO BOX 1009, PALMER LAKE, CO 80133-1009
PO BOX 1010, PALMER LAKE, CO 80133-1010
PO BOX 1011, PALMER LAKE, CO 80133-1011
PO BOX 1012, PALMER LAKE, CO 80133-1012
PO BOX 1013, PALMER LAKE, CO 80133-1013
PO BOX 1014, PALMER LAKE, CO 80133-1014
PO BOX 1015, PALMER LAKE, CO 80133-1015
PO BOX 1016, PALMER LAKE, CO 80133-1016
PO BOX 1017, PALMER LAKE, CO 80133-1017
PO BOX 1018, PALMER LAKE, CO 80133-1018
PO BOX 1019, PALMER LAKE, CO 80133-1019
PO BOX 1020, PALMER LAKE, CO 80133-1020
PO BOX 1021, PALMER LAKE, CO 80133-1021
PO BOX 1022, PALMER LAKE, CO 80133-1022
PO BOX 1023, PALMER LAKE, CO 80133-1023
PO BOX 1024, PALMER LAKE, CO 80133-1024
PO BOX 1025, PALMER LAKE, CO 80133-1025
PO BOX 1026, PALMER LAKE, CO 80133-1026
PO BOX 1027, PALMER LAKE, CO 80133-1027
PO BOX 1028, PALMER LAKE, CO 80133-1028
PO BOX 1029, PALMER LAKE, CO 80133-1029
PO BOX 1030, PALMER LAKE, CO 80133-1030
PO BOX 1031, PALMER LAKE, CO 80133-1031
PO BOX 1032, PALMER LAKE, CO 80133-1032
PO BOX 1033, PALMER LAKE, CO 80133-1033
PO BOX 1034, PALMER LAKE, CO 80133-1034
PO BOX 1035, PALMER LAKE, CO 80133-1035
PO BOX 1036, PALMER LAKE, CO 80133-1036
PO BOX 1037, PALMER LAKE, CO 80133-1037
PO BOX 1038, PALMER LAKE, CO 80133-1038
PO BOX 1039, PALMER LAKE, CO 80133-1039
PO BOX 1040, PALMER LAKE, CO 80133-1040
PO BOX 1041, PALMER LAKE, CO 80133-1041
PO BOX 1042, PALMER LAKE, CO 80133-1042
PO BOX 1043, PALMER LAKE, CO 80133-1043
PO BOX 1044, PALMER LAKE, CO 80133-1044
PO BOX 1045, PALMER LAKE, CO 80133-1045
PO BOX 1046, PALMER LAKE, CO 80133-1046
PO BOX 1047, PALMER LAKE, CO 80133-1047
PO BOX 1048, PALMER LAKE, CO 80133-1048
PO BOX 1049, PALMER LAKE, CO 80133-1049
PO BOX 1050, PALMER LAKE, CO 80133-1050
PO BOX 1051, PALMER LAKE, CO 80133-1051
PO BOX 1052, PALMER LAKE, CO 80133-1052
PO BOX 1053, PALMER LAKE, CO 80133-1053
PO BOX 1054, PALMER LAKE, CO 80133-1054
PO BOX 1055, PALMER LAKE, CO 80133-1055
PO BOX 1056, PALMER LAKE, CO 80133-1056
PO BOX 1057, PALMER LAKE, CO 80133-1057
PO BOX 1058, PALMER LAKE, CO 80133-1058
PO BOX 1059, PALMER LAKE, CO 80133-1059
PO BOX 1060, PALMER LAKE, CO 80133-1060
PO BOX 1061, PALMER LAKE, CO 80133-1061
PO BOX 1062, PALMER LAKE, CO 80133-1062
PO BOX 1063, PALMER LAKE, CO 80133-1063
PO BOX 1064, PALMER LAKE, CO 80133-1064
PO BOX 1065, PALMER LAKE, CO 80133-1065
PO BOX 1066, PALMER LAKE, CO 80133-1066
PO BOX 1067, PALMER LAKE, CO 80133-1067
PO BOX 1068, PALMER LAKE, CO 80133-1068
PO BOX 1069, PALMER LAKE, CO 80133-1069
PO BOX 1070, PALMER LAKE, CO 80133-1070
PO BOX 1071, PALMER LAKE, CO 80133-1071
PO BOX 1072, PALMER LAKE, CO 80133-1072
PO BOX 1073, PALMER LAKE, CO 80133-1073
PO BOX 1074, PALMER LAKE, CO 80133-1074
PO BOX 1075, PALMER LAKE, CO 80133-1075
PO BOX 1076, PALMER LAKE, CO 80133-1076
PO BOX 1077, PALMER LAKE, CO 80133-1077
PO BOX 1078, PALMER LAKE, CO 80133-1078
PO BOX 1079, PALMER LAKE, CO 80133-1079
PO BOX 1080, PALMER LAKE, CO 80133-1080
PO BOX 1081, PALMER LAKE, CO 80133-1081
PO BOX 1082, PALMER LAKE, CO 80133-1082
PO BOX 1083, PALMER LAKE, CO 80133-1083
PO BOX 1084, PALMER LAKE, CO 80133-1084
PO BOX 1085, PALMER LAKE, CO 80133-1085
PO BOX 1086, PALMER LAKE, CO 80133-1086
PO BOX 1087, PALMER LAKE, CO 80133-1087
PO BOX 1088, PALMER LAKE, CO 80133-1088
PO BOX 1089, PALMER LAKE, CO 80133-1089
PO BOX 1090, PALMER LAKE, CO 80133-1090
PO BOX 1091, PALMER LAKE, CO 80133-1091
PO BOX 1092, PALMER LAKE, CO 80133-1092
PO BOX 1093, PALMER LAKE, CO 80133-1093
PO BOX 1094, PALMER LAKE, CO 80133-1094
PO BOX 1095, PALMER LAKE, CO 80133-1095
PO BOX 1096, PALMER LAKE, CO 80133-1096
PO BOX 1097, PALMER LAKE, CO 80133-1097
PO BOX 1098, PALMER LAKE, CO 80133-1098
PO BOX 1099, PALMER LAKE, CO 80133-1099
PO BOX 1100, PALMER LAKE, CO 80133-1100
PO BOX 1101, PALMER LAKE, CO 80133-1101
PO BOX 1102, PALMER LAKE, CO 80133-1102
PO BOX 1103, PALMER LAKE, CO 80133-1103
PO BOX 1104, PALMER LAKE, CO 80133-1104
PO BOX 1105, PALMER LAKE, CO 80133-1105
PO BOX 1106, PALMER LAKE, CO 80133-1106
PO BOX 1107, PALMER LAKE, CO 80133-1107
PO BOX 1108, PALMER LAKE, CO 80133-1108
PO BOX 1109, PALMER LAKE, CO 80133-1109
PO BOX 1110, PALMER LAKE, CO 80133-1110
PO BOX 1111, PALMER LAKE, CO 80133-1111
PO BOX 1112, PALMER LAKE, CO 80133-1112
PO BOX 1113, PALMER LAKE, CO 80133-1113
PO BOX 1114, PALMER LAKE, CO 80133-1114
PO BOX 1115, PALMER LAKE, CO 80133-1115
PO BOX 1116, PALMER LAKE, CO 80133-1116
PO BOX 1117, PALMER LAKE, CO 80133-1117
PO BOX 1118, PALMER LAKE, CO 80133-1118
PO BOX 1119, PALMER LAKE, CO 80133-1119
PO BOX 1120, PALMER LAKE, CO 80133-1120
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