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 1001, CLINTON, MS 39060-1001
PO BOX 1002, CLINTON, MS 39060-1002
PO BOX 1003, CLINTON, MS 39060-1003
PO BOX 1004, CLINTON, MS 39060-1004
PO BOX 1005, CLINTON, MS 39060-1005
PO BOX 1006, CLINTON, MS 39060-1006
PO BOX 1007, CLINTON, MS 39060-1007
PO BOX 1008, CLINTON, MS 39060-1008
PO BOX 1009, CLINTON, MS 39060-1009
PO BOX 1010, CLINTON, MS 39060-1010
PO BOX 1011, CLINTON, MS 39060-1011
PO BOX 1012, CLINTON, MS 39060-1012
PO BOX 1013, CLINTON, MS 39060-1013
PO BOX 1014, CLINTON, MS 39060-1014
PO BOX 1015, CLINTON, MS 39060-1015
PO BOX 1016, CLINTON, MS 39060-1016
PO BOX 1017, CLINTON, MS 39060-1017
PO BOX 1018, CLINTON, MS 39060-1018
PO BOX 1019, CLINTON, MS 39060-1019
PO BOX 1020, CLINTON, MS 39060-1020
PO BOX 1021, CLINTON, MS 39060-1021
PO BOX 1022, CLINTON, MS 39060-1022
PO BOX 1023, CLINTON, MS 39060-1023
PO BOX 1024, CLINTON, MS 39060-1024
PO BOX 1025, CLINTON, MS 39060-1025
PO BOX 1026, CLINTON, MS 39060-1026
PO BOX 1027, CLINTON, MS 39060-1027
PO BOX 1028, CLINTON, MS 39060-1028
PO BOX 1029, CLINTON, MS 39060-1029
PO BOX 1030, CLINTON, MS 39060-1030
PO BOX 1031, CLINTON, MS 39060-1031
PO BOX 1032, CLINTON, MS 39060-1032
PO BOX 1033, CLINTON, MS 39060-1033
PO BOX 1034, CLINTON, MS 39060-1034
PO BOX 1035, CLINTON, MS 39060-1035
PO BOX 1036, CLINTON, MS 39060-1036
PO BOX 1037, CLINTON, MS 39060-1037
PO BOX 1038, CLINTON, MS 39060-1038
PO BOX 1039, CLINTON, MS 39060-1039
PO BOX 1040, CLINTON, MS 39060-1040
PO BOX 1041, CLINTON, MS 39060-1041
PO BOX 1042, CLINTON, MS 39060-1042
PO BOX 1043, CLINTON, MS 39060-1043
PO BOX 1044, CLINTON, MS 39060-1044
PO BOX 1045, CLINTON, MS 39060-1045
PO BOX 1046, CLINTON, MS 39060-1046
PO BOX 1047, CLINTON, MS 39060-1047
PO BOX 1048, CLINTON, MS 39060-1048
PO BOX 1049, CLINTON, MS 39060-1049
PO BOX 1050, CLINTON, MS 39060-1050
PO BOX 1051, CLINTON, MS 39060-1051
PO BOX 1052, CLINTON, MS 39060-1052
PO BOX 1053, CLINTON, MS 39060-1053
PO BOX 1054, CLINTON, MS 39060-1054
PO BOX 1055, CLINTON, MS 39060-1055
PO BOX 1056, CLINTON, MS 39060-1056
PO BOX 1057, CLINTON, MS 39060-1057
PO BOX 1058, CLINTON, MS 39060-1058
PO BOX 1059, CLINTON, MS 39060-1059
PO BOX 1060, CLINTON, MS 39060-1060
PO BOX 1061, CLINTON, MS 39060-1061
PO BOX 1062, CLINTON, MS 39060-1062
PO BOX 1063, CLINTON, MS 39060-1063
PO BOX 1064, CLINTON, MS 39060-1064
PO BOX 1065, CLINTON, MS 39060-1065
PO BOX 1066, CLINTON, MS 39060-1066
PO BOX 1067, CLINTON, MS 39060-1067
PO BOX 1068, CLINTON, MS 39060-1068
PO BOX 1069, CLINTON, MS 39060-1069
PO BOX 1070, CLINTON, MS 39060-1070
PO BOX 1071, CLINTON, MS 39060-1071
PO BOX 1072, CLINTON, MS 39060-1072
PO BOX 1073, CLINTON, MS 39060-1073
PO BOX 1074, CLINTON, MS 39060-1074
PO BOX 1075, CLINTON, MS 39060-1075
PO BOX 1076, CLINTON, MS 39060-1076
PO BOX 1077, CLINTON, MS 39060-1077
PO BOX 1078, CLINTON, MS 39060-1078
PO BOX 1079, CLINTON, MS 39060-1079
PO BOX 1080, CLINTON, MS 39060-1080
PO BOX 1081, CLINTON, MS 39060-1081
PO BOX 1082, CLINTON, MS 39060-1082
PO BOX 1083, CLINTON, MS 39060-1083
PO BOX 1084, CLINTON, MS 39060-1084
PO BOX 1085, CLINTON, MS 39060-1085
PO BOX 1086, CLINTON, MS 39060-1086
PO BOX 1087, CLINTON, MS 39060-1087
PO BOX 1088, CLINTON, MS 39060-1088
PO BOX 1089, CLINTON, MS 39060-1089
PO BOX 1090, CLINTON, MS 39060-1090
PO BOX 1091, CLINTON, MS 39060-1091
PO BOX 1092, CLINTON, MS 39060-1092
PO BOX 1093, CLINTON, MS 39060-1093
PO BOX 1094, CLINTON, MS 39060-1094
PO BOX 1095, CLINTON, MS 39060-1095
PO BOX 1096, CLINTON, MS 39060-1096
PO BOX 1097, CLINTON, MS 39060-1097
PO BOX 1098, CLINTON, MS 39060-1098
PO BOX 1099, CLINTON, MS 39060-1099
PO BOX 1100, CLINTON, MS 39060-1100
PO BOX 1101, CLINTON, MS 39060-1101
PO BOX 1102, CLINTON, MS 39060-1102
PO BOX 1103, CLINTON, MS 39060-1103
PO BOX 1104, CLINTON, MS 39060-1104
PO BOX 1105, CLINTON, MS 39060-1105
PO BOX 1106, CLINTON, MS 39060-1106
PO BOX 1107, CLINTON, MS 39060-1107
PO BOX 1108, CLINTON, MS 39060-1108
PO BOX 1109, CLINTON, MS 39060-1109
PO BOX 1110, CLINTON, MS 39060-1110
PO BOX 1111, CLINTON, MS 39060-1111
PO BOX 1112, CLINTON, MS 39060-1112
PO BOX 1113, CLINTON, MS 39060-1113
PO BOX 1114, CLINTON, MS 39060-1114
PO BOX 1115, CLINTON, MS 39060-1115
PO BOX 1116, CLINTON, MS 39060-1116
PO BOX 1117, CLINTON, MS 39060-1117
PO BOX 1118, CLINTON, MS 39060-1118
PO BOX 1119, CLINTON, MS 39060-1119
PO BOX 1120, CLINTON, MS 39060-1120
PO BOX 1121, CLINTON, MS 39060-1121
PO BOX 1122, CLINTON, MS 39060-1122
PO BOX 1123, CLINTON, MS 39060-1123
PO BOX 1124, CLINTON, MS 39060-1124
PO BOX 1125, CLINTON, MS 39060-1125
PO BOX 1126, CLINTON, MS 39060-1126
PO BOX 1127, CLINTON, MS 39060-1127
PO BOX 1128, CLINTON, MS 39060-1128
PO BOX 1129, CLINTON, MS 39060-1129
PO BOX 1130, CLINTON, MS 39060-1130
PO BOX 1131, CLINTON, MS 39060-1131
PO BOX 1132, CLINTON, MS 39060-1132
PO BOX 1133, CLINTON, MS 39060-1133
PO BOX 1134, CLINTON, MS 39060-1134
PO BOX 1135, CLINTON, MS 39060-1135
PO BOX 1136, CLINTON, MS 39060-1136
PO BOX 1137, CLINTON, MS 39060-1137
PO BOX 1138, CLINTON, MS 39060-1138
PO BOX 1139, CLINTON, MS 39060-1139
PO BOX 1140, CLINTON, MS 39060-1140
PO BOX 1141, CLINTON, MS 39060-1141
PO BOX 1142, CLINTON, MS 39060-1142
PO BOX 1143, CLINTON, MS 39060-1143
PO BOX 1144, CLINTON, MS 39060-1144
PO BOX 1145, CLINTON, MS 39060-1145
PO BOX 1146, CLINTON, MS 39060-1146
PO BOX 1147, CLINTON, MS 39060-1147
PO BOX 1148, CLINTON, MS 39060-1148
PO BOX 1149, CLINTON, MS 39060-1149
PO BOX 1150, CLINTON, MS 39060-1150
PO BOX 1151, CLINTON, MS 39060-1151
PO BOX 1152, CLINTON, MS 39060-1152
PO BOX 1153, CLINTON, MS 39060-1153
PO BOX 1154, CLINTON, MS 39060-1154
PO BOX 1155, CLINTON, MS 39060-1155
PO BOX 1156, CLINTON, MS 39060-1156
PO BOX 1157, CLINTON, MS 39060-1157
PO BOX 1158, CLINTON, MS 39060-1158
PO BOX 1159, CLINTON, MS 39060-1159
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