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 981, SPARTANBURG, SC 29304-0981
PO BOX 982, SPARTANBURG, SC 29304-0982
PO BOX 983, SPARTANBURG, SC 29304-0983
PO BOX 984, SPARTANBURG, SC 29304-0984
PO BOX 985, SPARTANBURG, SC 29304-0985
PO BOX 986, SPARTANBURG, SC 29304-0986
PO BOX 987, SPARTANBURG, SC 29304-0987
PO BOX 988, SPARTANBURG, SC 29304-0988
PO BOX 989, SPARTANBURG, SC 29304-0989
PO BOX 990, SPARTANBURG, SC 29304-0990
PO BOX 991, SPARTANBURG, SC 29304-0991
PO BOX 992, SPARTANBURG, SC 29304-0992
PO BOX 993, SPARTANBURG, SC 29304-0993
PO BOX 994, SPARTANBURG, SC 29304-0994
PO BOX 995, SPARTANBURG, SC 29304-0995
PO BOX 996, SPARTANBURG, SC 29304-0996
PO BOX 997, SPARTANBURG, SC 29304-0997
PO BOX 998, SPARTANBURG, SC 29304-0998
PO BOX 999, SPARTANBURG, SC 29304-0999
PO BOX 1000, SPARTANBURG, SC 29304-1000
PO BOX 1001, SPARTANBURG, SC 29304-1001
PO BOX 1002, SPARTANBURG, SC 29304-1002
PO BOX 1003, SPARTANBURG, SC 29304-1003
PO BOX 1004, SPARTANBURG, SC 29304-1004
PO BOX 1005, SPARTANBURG, SC 29304-1005
PO BOX 1006, SPARTANBURG, SC 29304-1006
PO BOX 1007, SPARTANBURG, SC 29304-1007
PO BOX 1008, SPARTANBURG, SC 29304-1008
PO BOX 1009, SPARTANBURG, SC 29304-1009
PO BOX 1010, SPARTANBURG, SC 29304-1010
PO BOX 1011, SPARTANBURG, SC 29304-1011
PO BOX 1012, SPARTANBURG, SC 29304-1012
PO BOX 1013, SPARTANBURG, SC 29304-1013
PO BOX 1014, SPARTANBURG, SC 29304-1014
PO BOX 1015, SPARTANBURG, SC 29304-1015
PO BOX 1016, SPARTANBURG, SC 29304-1016
PO BOX 1017, SPARTANBURG, SC 29304-1017
PO BOX 1018, SPARTANBURG, SC 29304-1018
PO BOX 1019, SPARTANBURG, SC 29304-1019
PO BOX 1020, SPARTANBURG, SC 29304-1020
PO BOX 1021, SPARTANBURG, SC 29304-1021
PO BOX 1022, SPARTANBURG, SC 29304-1022
PO BOX 1023, SPARTANBURG, SC 29304-1023
PO BOX 1024, SPARTANBURG, SC 29304-1024
PO BOX 1025, SPARTANBURG, SC 29304-1025
PO BOX 1026, SPARTANBURG, SC 29304-1026
PO BOX 1027, SPARTANBURG, SC 29304-1027
PO BOX 1028, SPARTANBURG, SC 29304-1028
PO BOX 1029, SPARTANBURG, SC 29304-1029
PO BOX 1030, SPARTANBURG, SC 29304-1030
PO BOX 1031, SPARTANBURG, SC 29304-1031
PO BOX 1032, SPARTANBURG, SC 29304-1032
PO BOX 1033, SPARTANBURG, SC 29304-1033
PO BOX 1034, SPARTANBURG, SC 29304-1034
PO BOX 1035, SPARTANBURG, SC 29304-1035
PO BOX 1036, SPARTANBURG, SC 29304-1036
PO BOX 1037, SPARTANBURG, SC 29304-1037
PO BOX 1038, SPARTANBURG, SC 29304-1038
PO BOX 1039, SPARTANBURG, SC 29304-1039
PO BOX 1040, SPARTANBURG, SC 29304-1040
PO BOX 1041, SPARTANBURG, SC 29304-1041
PO BOX 1042, SPARTANBURG, SC 29304-1042
PO BOX 1043, SPARTANBURG, SC 29304-1043
PO BOX 1044, SPARTANBURG, SC 29304-1044
PO BOX 1045, SPARTANBURG, SC 29304-1045
PO BOX 1046, SPARTANBURG, SC 29304-1046
PO BOX 1047, SPARTANBURG, SC 29304-1047
PO BOX 1048, SPARTANBURG, SC 29304-1048
PO BOX 1049, SPARTANBURG, SC 29304-1049
PO BOX 1050, SPARTANBURG, SC 29304-1050
PO BOX 1051, SPARTANBURG, SC 29304-1051
PO BOX 1052, SPARTANBURG, SC 29304-1052
PO BOX 1053, SPARTANBURG, SC 29304-1053
PO BOX 1054, SPARTANBURG, SC 29304-1054
PO BOX 1055, SPARTANBURG, SC 29304-1055
PO BOX 1056, SPARTANBURG, SC 29304-1056
PO BOX 1057, SPARTANBURG, SC 29304-1057
PO BOX 1058, SPARTANBURG, SC 29304-1058
PO BOX 1059, SPARTANBURG, SC 29304-1059
PO BOX 1060, SPARTANBURG, SC 29304-1060
PO BOX 1061, SPARTANBURG, SC 29304-1061
PO BOX 1062, SPARTANBURG, SC 29304-1062
PO BOX 1063, SPARTANBURG, SC 29304-1063
PO BOX 1064, SPARTANBURG, SC 29304-1064
PO BOX 1065, SPARTANBURG, SC 29304-1065
PO BOX 1066, SPARTANBURG, SC 29304-1066
PO BOX 1067, SPARTANBURG, SC 29304-1067
PO BOX 1068, SPARTANBURG, SC 29304-1068
PO BOX 1069, SPARTANBURG, SC 29304-1069
PO BOX 1070, SPARTANBURG, SC 29304-1070
PO BOX 1071, SPARTANBURG, SC 29304-1071
PO BOX 1072, SPARTANBURG, SC 29304-1072
PO BOX 1073, SPARTANBURG, SC 29304-1073
PO BOX 1074, SPARTANBURG, SC 29304-1074
PO BOX 1075, SPARTANBURG, SC 29304-1075
PO BOX 1076, SPARTANBURG, SC 29304-1076
PO BOX 1077, SPARTANBURG, SC 29304-1077
PO BOX 1078, SPARTANBURG, SC 29304-1078
PO BOX 1079, SPARTANBURG, SC 29304-1079
PO BOX 1080, SPARTANBURG, SC 29304-1080
PO BOX 1081, SPARTANBURG, SC 29304-1081
PO BOX 1082, SPARTANBURG, SC 29304-1082
PO BOX 1083, SPARTANBURG, SC 29304-1083
PO BOX 1084, SPARTANBURG, SC 29304-1084
PO BOX 1085, SPARTANBURG, SC 29304-1085
PO BOX 1086, SPARTANBURG, SC 29304-1086
PO BOX 1087, SPARTANBURG, SC 29304-1087
PO BOX 1088, SPARTANBURG, SC 29304-1088
PO BOX 1089, SPARTANBURG, SC 29304-1089
PO BOX 1090, SPARTANBURG, SC 29304-1090
PO BOX 1091, SPARTANBURG, SC 29304-1091
PO BOX 1092, SPARTANBURG, SC 29304-1092
PO BOX 1093, SPARTANBURG, SC 29304-1093
PO BOX 1094, SPARTANBURG, SC 29304-1094
PO BOX 1095, SPARTANBURG, SC 29304-1095
PO BOX 1096, SPARTANBURG, SC 29304-1096
PO BOX 1097, SPARTANBURG, SC 29304-1097
PO BOX 1098, SPARTANBURG, SC 29304-1098
PO BOX 1099, SPARTANBURG, SC 29304-1099
PO BOX 1100, SPARTANBURG, SC 29304-1100
PO BOX 1101, SPARTANBURG, SC 29304-1101
PO BOX 1102, SPARTANBURG, SC 29304-1102
PO BOX 1103, SPARTANBURG, SC 29304-1103
PO BOX 1104, SPARTANBURG, SC 29304-1104
PO BOX 1105, SPARTANBURG, SC 29304-1105
PO BOX 1106, SPARTANBURG, SC 29304-1106
PO BOX 1107, SPARTANBURG, SC 29304-1107
PO BOX 1108, SPARTANBURG, SC 29304-1108
PO BOX 1109, SPARTANBURG, SC 29304-1109
PO BOX 1110, SPARTANBURG, SC 29304-1110
PO BOX 1111, SPARTANBURG, SC 29304-1111
PO BOX 1112, SPARTANBURG, SC 29304-1112
PO BOX 1113, SPARTANBURG, SC 29304-1113
PO BOX 1114, SPARTANBURG, SC 29304-1114
PO BOX 1115, SPARTANBURG, SC 29304-1115
PO BOX 1116, SPARTANBURG, SC 29304-1116
PO BOX 1117, SPARTANBURG, SC 29304-1117
PO BOX 1118, SPARTANBURG, SC 29304-1118
PO BOX 1119, SPARTANBURG, SC 29304-1119
PO BOX 1120, SPARTANBURG, SC 29304-1120
PO BOX 1121, SPARTANBURG, SC 29304-1121
PO BOX 1122, SPARTANBURG, SC 29304-1122
PO BOX 1123, SPARTANBURG, SC 29304-1123
PO BOX 1124, SPARTANBURG, SC 29304-1124
PO BOX 1125, SPARTANBURG, SC 29304-1125
PO BOX 1126, SPARTANBURG, SC 29304-1126
PO BOX 1127, SPARTANBURG, SC 29304-1127
PO BOX 1128, SPARTANBURG, SC 29304-1128
PO BOX 1129, SPARTANBURG, SC 29304-1129
PO BOX 1130, SPARTANBURG, SC 29304-1130
PO BOX 1131, SPARTANBURG, SC 29304-1131
PO BOX 1132, SPARTANBURG, SC 29304-1132
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