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, MIDDLETOWN SPRINGS, VT 05757-1001
PO BOX 1002, MIDDLETOWN SPRINGS, VT 05757-1002
PO BOX 1003, MIDDLETOWN SPRINGS, VT 05757-1003
PO BOX 1004, MIDDLETOWN SPRINGS, VT 05757-1004
PO BOX 1005, MIDDLETOWN SPRINGS, VT 05757-1005
PO BOX 1006, MIDDLETOWN SPRINGS, VT 05757-1006
PO BOX 1007, MIDDLETOWN SPRINGS, VT 05757-1007
PO BOX 1008, MIDDLETOWN SPRINGS, VT 05757-1008
PO BOX 1009, MIDDLETOWN SPRINGS, VT 05757-1009
PO BOX 1010, MIDDLETOWN SPRINGS, VT 05757-1010
PO BOX 1011, MIDDLETOWN SPRINGS, VT 05757-1011
PO BOX 1012, MIDDLETOWN SPRINGS, VT 05757-1012
PO BOX 1013, MIDDLETOWN SPRINGS, VT 05757-1013
PO BOX 1014, MIDDLETOWN SPRINGS, VT 05757-1014
PO BOX 1015, MIDDLETOWN SPRINGS, VT 05757-1015
PO BOX 1016, MIDDLETOWN SPRINGS, VT 05757-1016
PO BOX 1017, MIDDLETOWN SPRINGS, VT 05757-1017
PO BOX 1018, MIDDLETOWN SPRINGS, VT 05757-1018
PO BOX 1019, MIDDLETOWN SPRINGS, VT 05757-1019
PO BOX 1020, MIDDLETOWN SPRINGS, VT 05757-1020
PO BOX 1021, MIDDLETOWN SPRINGS, VT 05757-1021
PO BOX 1022, MIDDLETOWN SPRINGS, VT 05757-1022
PO BOX 1023, MIDDLETOWN SPRINGS, VT 05757-1023
PO BOX 1024, MIDDLETOWN SPRINGS, VT 05757-1024
PO BOX 1025, MIDDLETOWN SPRINGS, VT 05757-1025
PO BOX 1026, MIDDLETOWN SPRINGS, VT 05757-1026
PO BOX 1027, MIDDLETOWN SPRINGS, VT 05757-1027
PO BOX 1028, MIDDLETOWN SPRINGS, VT 05757-1028
PO BOX 1029, MIDDLETOWN SPRINGS, VT 05757-1029
PO BOX 1030, MIDDLETOWN SPRINGS, VT 05757-1030
PO BOX 1031, MIDDLETOWN SPRINGS, VT 05757-1031
PO BOX 1032, MIDDLETOWN SPRINGS, VT 05757-1032
PO BOX 1033, MIDDLETOWN SPRINGS, VT 05757-1033
PO BOX 1034, MIDDLETOWN SPRINGS, VT 05757-1034
PO BOX 1035, MIDDLETOWN SPRINGS, VT 05757-1035
PO BOX 1036, MIDDLETOWN SPRINGS, VT 05757-1036
PO BOX 1037, MIDDLETOWN SPRINGS, VT 05757-1037
PO BOX 1038, MIDDLETOWN SPRINGS, VT 05757-1038
PO BOX 1039, MIDDLETOWN SPRINGS, VT 05757-1039
PO BOX 1040, MIDDLETOWN SPRINGS, VT 05757-1040
PO BOX 1041, MIDDLETOWN SPRINGS, VT 05757-1041
PO BOX 1042, MIDDLETOWN SPRINGS, VT 05757-1042
PO BOX 1043, MIDDLETOWN SPRINGS, VT 05757-1043
PO BOX 1044, MIDDLETOWN SPRINGS, VT 05757-1044
PO BOX 1045, MIDDLETOWN SPRINGS, VT 05757-1045
PO BOX 1046, MIDDLETOWN SPRINGS, VT 05757-1046
PO BOX 1047, MIDDLETOWN SPRINGS, VT 05757-1047
PO BOX 1048, MIDDLETOWN SPRINGS, VT 05757-1048
PO BOX 1049, MIDDLETOWN SPRINGS, VT 05757-1049
PO BOX 1050, MIDDLETOWN SPRINGS, VT 05757-1050
PO BOX 1051, MIDDLETOWN SPRINGS, VT 05757-1051
PO BOX 1052, MIDDLETOWN SPRINGS, VT 05757-1052
PO BOX 1053, MIDDLETOWN SPRINGS, VT 05757-1053
PO BOX 1054, MIDDLETOWN SPRINGS, VT 05757-1054
PO BOX 1055, MIDDLETOWN SPRINGS, VT 05757-1055
PO BOX 1056, MIDDLETOWN SPRINGS, VT 05757-1056
PO BOX 1057, MIDDLETOWN SPRINGS, VT 05757-1057
PO BOX 1058, MIDDLETOWN SPRINGS, VT 05757-1058
PO BOX 1059, MIDDLETOWN SPRINGS, VT 05757-1059
PO BOX 1060, MIDDLETOWN SPRINGS, VT 05757-1060
PO BOX 1061, MIDDLETOWN SPRINGS, VT 05757-1061
PO BOX 1062, MIDDLETOWN SPRINGS, VT 05757-1062
PO BOX 1063, MIDDLETOWN SPRINGS, VT 05757-1063
PO BOX 1064, MIDDLETOWN SPRINGS, VT 05757-1064
PO BOX 1065, MIDDLETOWN SPRINGS, VT 05757-1065
PO BOX 1066, MIDDLETOWN SPRINGS, VT 05757-1066
PO BOX 1067, MIDDLETOWN SPRINGS, VT 05757-1067
PO BOX 1068, MIDDLETOWN SPRINGS, VT 05757-1068
PO BOX 1069, MIDDLETOWN SPRINGS, VT 05757-1069
PO BOX 1070, MIDDLETOWN SPRINGS, VT 05757-1070
PO BOX 1071, MIDDLETOWN SPRINGS, VT 05757-1071
PO BOX 1072, MIDDLETOWN SPRINGS, VT 05757-1072
PO BOX 1073, MIDDLETOWN SPRINGS, VT 05757-1073
PO BOX 1074, MIDDLETOWN SPRINGS, VT 05757-1074
PO BOX 1075, MIDDLETOWN SPRINGS, VT 05757-1075
PO BOX 1076, MIDDLETOWN SPRINGS, VT 05757-1076
PO BOX 1077, MIDDLETOWN SPRINGS, VT 05757-1077
PO BOX 1078, MIDDLETOWN SPRINGS, VT 05757-1078
PO BOX 1079, MIDDLETOWN SPRINGS, VT 05757-1079
PO BOX 1080, MIDDLETOWN SPRINGS, VT 05757-1080
PO BOX 1081, MIDDLETOWN SPRINGS, VT 05757-1081
PO BOX 1082, MIDDLETOWN SPRINGS, VT 05757-1082
PO BOX 1083, MIDDLETOWN SPRINGS, VT 05757-1083
PO BOX 1084, MIDDLETOWN SPRINGS, VT 05757-1084
PO BOX 1085, MIDDLETOWN SPRINGS, VT 05757-1085
PO BOX 1086, MIDDLETOWN SPRINGS, VT 05757-1086
PO BOX 1087, MIDDLETOWN SPRINGS, VT 05757-1087
PO BOX 1088, MIDDLETOWN SPRINGS, VT 05757-1088
PO BOX 1089, MIDDLETOWN SPRINGS, VT 05757-1089
PO BOX 1090, MIDDLETOWN SPRINGS, VT 05757-1090
PO BOX 1091, MIDDLETOWN SPRINGS, VT 05757-1091
PO BOX 1092, MIDDLETOWN SPRINGS, VT 05757-1092
PO BOX 1093, MIDDLETOWN SPRINGS, VT 05757-1093
PO BOX 1094, MIDDLETOWN SPRINGS, VT 05757-1094
PO BOX 1095, MIDDLETOWN SPRINGS, VT 05757-1095
PO BOX 1096, MIDDLETOWN SPRINGS, VT 05757-1096
PO BOX 1097, MIDDLETOWN SPRINGS, VT 05757-1097
PO BOX 1098, MIDDLETOWN SPRINGS, VT 05757-1098
PO BOX 1099, MIDDLETOWN SPRINGS, VT 05757-1099
PO BOX 1100, MIDDLETOWN SPRINGS, VT 05757-1100
PO BOX 1101, MIDDLETOWN SPRINGS, VT 05757-1101
PO BOX 1102, MIDDLETOWN SPRINGS, VT 05757-1102
PO BOX 1103, MIDDLETOWN SPRINGS, VT 05757-1103
PO BOX 1104, MIDDLETOWN SPRINGS, VT 05757-1104
PO BOX 1105, MIDDLETOWN SPRINGS, VT 05757-1105
PO BOX 1106, MIDDLETOWN SPRINGS, VT 05757-1106
PO BOX 1107, MIDDLETOWN SPRINGS, VT 05757-1107
PO BOX 1108, MIDDLETOWN SPRINGS, VT 05757-1108
PO BOX 1109, MIDDLETOWN SPRINGS, VT 05757-1109
PO BOX 1110, MIDDLETOWN SPRINGS, VT 05757-1110
PO BOX 1111, MIDDLETOWN SPRINGS, VT 05757-1111
PO BOX 1112, MIDDLETOWN SPRINGS, VT 05757-1112
PO BOX 1113, MIDDLETOWN SPRINGS, VT 05757-1113
PO BOX 1114, MIDDLETOWN SPRINGS, VT 05757-1114
PO BOX 1115, MIDDLETOWN SPRINGS, VT 05757-1115
PO BOX 1116, MIDDLETOWN SPRINGS, VT 05757-1116
PO BOX 1117, MIDDLETOWN SPRINGS, VT 05757-1117
PO BOX 1118, MIDDLETOWN SPRINGS, VT 05757-1118
PO BOX 1119, MIDDLETOWN SPRINGS, VT 05757-1119
PO BOX 1120, MIDDLETOWN SPRINGS, VT 05757-1120
PO BOX 1121, MIDDLETOWN SPRINGS, VT 05757-1121
PO BOX 1122, MIDDLETOWN SPRINGS, VT 05757-1122
PO BOX 1123, MIDDLETOWN SPRINGS, VT 05757-1123
PO BOX 1124, MIDDLETOWN SPRINGS, VT 05757-1124
PO BOX 1125, MIDDLETOWN SPRINGS, VT 05757-1125
PO BOX 1126, MIDDLETOWN SPRINGS, VT 05757-1126
PO BOX 1127, MIDDLETOWN SPRINGS, VT 05757-1127
PO BOX 1128, MIDDLETOWN SPRINGS, VT 05757-1128
PO BOX 1129, MIDDLETOWN SPRINGS, VT 05757-1129
PO BOX 1130, MIDDLETOWN SPRINGS, VT 05757-1130
PO BOX 1131, MIDDLETOWN SPRINGS, VT 05757-1131
PO BOX 1132, MIDDLETOWN SPRINGS, VT 05757-1132
PO BOX 1133, MIDDLETOWN SPRINGS, VT 05757-1133
PO BOX 1134, MIDDLETOWN SPRINGS, VT 05757-1134
PO BOX 1135, MIDDLETOWN SPRINGS, VT 05757-1135
PO BOX 1136, MIDDLETOWN SPRINGS, VT 05757-1136
PO BOX 1137, MIDDLETOWN SPRINGS, VT 05757-1137
PO BOX 1138, MIDDLETOWN SPRINGS, VT 05757-1138
PO BOX 1139, MIDDLETOWN SPRINGS, VT 05757-1139
PO BOX 1140, MIDDLETOWN SPRINGS, VT 05757-1140
PO BOX 1141, MIDDLETOWN SPRINGS, VT 05757-1141
PO BOX 1142, MIDDLETOWN SPRINGS, VT 05757-1142
PO BOX 1143, MIDDLETOWN SPRINGS, VT 05757-1143
PO BOX 1144, MIDDLETOWN SPRINGS, VT 05757-1144
PO BOX 1145, MIDDLETOWN SPRINGS, VT 05757-1145
PO BOX 1146, MIDDLETOWN SPRINGS, VT 05757-1146
PO BOX 1147, MIDDLETOWN SPRINGS, VT 05757-1147
PO BOX 1148, MIDDLETOWN SPRINGS, VT 05757-1148
PO BOX 1149, MIDDLETOWN SPRINGS, VT 05757-1149
PO BOX 1150, MIDDLETOWN SPRINGS, VT 05757-1150
PO BOX 1151, MIDDLETOWN SPRINGS, VT 05757-1151
PO BOX 1152, MIDDLETOWN SPRINGS, VT 05757-1152
PO BOX 1153, MIDDLETOWN SPRINGS, VT 05757-1153
PO BOX 1154, MIDDLETOWN SPRINGS, VT 05757-1154
PO BOX 1155, MIDDLETOWN SPRINGS, VT 05757-1155
PO BOX 1156, MIDDLETOWN SPRINGS, VT 05757-1156
PO BOX 1157, MIDDLETOWN SPRINGS, VT 05757-1157
PO BOX 1158, MIDDLETOWN SPRINGS, VT 05757-1158
PO BOX 1159, MIDDLETOWN SPRINGS, VT 05757-1159
PO BOX 1160, MIDDLETOWN SPRINGS, VT 05757-1160
PO BOX 1161, MIDDLETOWN SPRINGS, VT 05757-1161
PO BOX 1162, MIDDLETOWN SPRINGS, VT 05757-1162
PO BOX 1163, MIDDLETOWN SPRINGS, VT 05757-1163
PO BOX 1164, MIDDLETOWN SPRINGS, VT 05757-1164
PO BOX 1165, MIDDLETOWN SPRINGS, VT 05757-1165
PO BOX 1166, MIDDLETOWN SPRINGS, VT 05757-1166
PO BOX 1167, MIDDLETOWN SPRINGS, VT 05757-1167
PO BOX 1168, MIDDLETOWN SPRINGS, VT 05757-1168
PO BOX 1169, MIDDLETOWN SPRINGS, VT 05757-1169
PO BOX 1170, MIDDLETOWN SPRINGS, VT 05757-1170
PO BOX 1171, MIDDLETOWN SPRINGS, VT 05757-1171
PO BOX 1172, MIDDLETOWN SPRINGS, VT 05757-1172
PO BOX 1173, MIDDLETOWN SPRINGS, VT 05757-1173
PO BOX 1174, MIDDLETOWN SPRINGS, VT 05757-1174
PO BOX 1175, MIDDLETOWN SPRINGS, VT 05757-1175
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