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 1121, MIDDLETOWN, CT 06457-1121
PO BOX 1122, MIDDLETOWN, CT 06457-1122
PO BOX 1123, MIDDLETOWN, CT 06457-1123
PO BOX 1124, MIDDLETOWN, CT 06457-1124
PO BOX 1125, MIDDLETOWN, CT 06457-1125
PO BOX 1126, MIDDLETOWN, CT 06457-1126
PO BOX 1127, MIDDLETOWN, CT 06457-1127
PO BOX 1128, MIDDLETOWN, CT 06457-1128
PO BOX 1129, MIDDLETOWN, CT 06457-1129
PO BOX 1130, MIDDLETOWN, CT 06457-1130
PO BOX 1131, MIDDLETOWN, CT 06457-1131
PO BOX 1132, MIDDLETOWN, CT 06457-1132
PO BOX 1133, MIDDLETOWN, CT 06457-1133
PO BOX 1134, MIDDLETOWN, CT 06457-1134
PO BOX 1135, MIDDLETOWN, CT 06457-1135
PO BOX 1136, MIDDLETOWN, CT 06457-1136
PO BOX 1137, MIDDLETOWN, CT 06457-1137
PO BOX 1138, MIDDLETOWN, CT 06457-1138
PO BOX 1139, MIDDLETOWN, CT 06457-1139
PO BOX 1140, MIDDLETOWN, CT 06457-1140
PO BOX 1141, MIDDLETOWN, CT 06457-1141
PO BOX 1142, MIDDLETOWN, CT 06457-1142
PO BOX 1143, MIDDLETOWN, CT 06457-1143
PO BOX 1144, MIDDLETOWN, CT 06457-1144
PO BOX 1145, MIDDLETOWN, CT 06457-1145
PO BOX 1146, MIDDLETOWN, CT 06457-1146
PO BOX 1147, MIDDLETOWN, CT 06457-1147
PO BOX 1148, MIDDLETOWN, CT 06457-1148
PO BOX 1149, MIDDLETOWN, CT 06457-1149
PO BOX 1150, MIDDLETOWN, CT 06457-1150
PO BOX 1151, MIDDLETOWN, CT 06457-1151
PO BOX 1152, MIDDLETOWN, CT 06457-1152
PO BOX 1153, MIDDLETOWN, CT 06457-1153
PO BOX 1154, MIDDLETOWN, CT 06457-1154
PO BOX 1155, MIDDLETOWN, CT 06457-1155
PO BOX 1156, MIDDLETOWN, CT 06457-1156
PO BOX 1157, MIDDLETOWN, CT 06457-1157
PO BOX 1158, MIDDLETOWN, CT 06457-1158
PO BOX 1159, MIDDLETOWN, CT 06457-1159
PO BOX 1160, MIDDLETOWN, CT 06457-1160
PO BOX 1161, MIDDLETOWN, CT 06457-1161
PO BOX 1162, MIDDLETOWN, CT 06457-1162
PO BOX 1163, MIDDLETOWN, CT 06457-1163
PO BOX 1164, MIDDLETOWN, CT 06457-1164
PO BOX 1165, MIDDLETOWN, CT 06457-1165
PO BOX 1166, MIDDLETOWN, CT 06457-1166
PO BOX 1167, MIDDLETOWN, CT 06457-1167
PO BOX 1168, MIDDLETOWN, CT 06457-1168
PO BOX 1169, MIDDLETOWN, CT 06457-1169
PO BOX 1170, MIDDLETOWN, CT 06457-1170
PO BOX 1171, MIDDLETOWN, CT 06457-1171
PO BOX 1172, MIDDLETOWN, CT 06457-1172
PO BOX 1173, MIDDLETOWN, CT 06457-1173
PO BOX 1174, MIDDLETOWN, CT 06457-1174
PO BOX 1175, MIDDLETOWN, CT 06457-1175
PO BOX 1176, MIDDLETOWN, CT 06457-1176
PO BOX 1177, MIDDLETOWN, CT 06457-1177
PO BOX 1178, MIDDLETOWN, CT 06457-1178
PO BOX 1179, MIDDLETOWN, CT 06457-1179
PO BOX 1180, MIDDLETOWN, CT 06457-1180
PO BOX 1181, MIDDLETOWN, CT 06457-1181
PO BOX 1182, MIDDLETOWN, CT 06457-1182
PO BOX 1183, MIDDLETOWN, CT 06457-1183
PO BOX 1184, MIDDLETOWN, CT 06457-1184
PO BOX 1185, MIDDLETOWN, CT 06457-1185
PO BOX 1186, MIDDLETOWN, CT 06457-1186
PO BOX 1187, MIDDLETOWN, CT 06457-1187
PO BOX 1188, MIDDLETOWN, CT 06457-1188
PO BOX 1189, MIDDLETOWN, CT 06457-1189
PO BOX 1190, MIDDLETOWN, CT 06457-1190
PO BOX 1191, MIDDLETOWN, CT 06457-1191
PO BOX 1192, MIDDLETOWN, CT 06457-1192
PO BOX 1193, MIDDLETOWN, CT 06457-1193
PO BOX 1194, MIDDLETOWN, CT 06457-1194
PO BOX 1195, MIDDLETOWN, CT 06457-1195
PO BOX 1196, MIDDLETOWN, CT 06457-1196
PO BOX 1197, MIDDLETOWN, CT 06457-1197
PO BOX 1198, MIDDLETOWN, CT 06457-1198
PO BOX 1199, MIDDLETOWN, CT 06457-1199
PO BOX 1200, MIDDLETOWN, CT 06457-1200
PO BOX 1201, MIDDLETOWN, CT 06457-1201
PO BOX 1202, MIDDLETOWN, CT 06457-1202
PO BOX 1203, MIDDLETOWN, CT 06457-1203
PO BOX 1204, MIDDLETOWN, CT 06457-1204
PO BOX 1205, MIDDLETOWN, CT 06457-1205
PO BOX 1206, MIDDLETOWN, CT 06457-1206
PO BOX 1207, MIDDLETOWN, CT 06457-1207
PO BOX 1208, MIDDLETOWN, CT 06457-1208
PO BOX 1209, MIDDLETOWN, CT 06457-1209
PO BOX 1210, MIDDLETOWN, CT 06457-1210
PO BOX 1211, MIDDLETOWN, CT 06457-1211
PO BOX 1212, MIDDLETOWN, CT 06457-1212
PO BOX 1213, MIDDLETOWN, CT 06457-1213
PO BOX 1214, MIDDLETOWN, CT 06457-1214
PO BOX 1215, MIDDLETOWN, CT 06457-1215
PO BOX 1216, MIDDLETOWN, CT 06457-1216
PO BOX 1217, MIDDLETOWN, CT 06457-1217
PO BOX 1218, MIDDLETOWN, CT 06457-1218
PO BOX 1219, MIDDLETOWN, CT 06457-1219
PO BOX 1220, MIDDLETOWN, CT 06457-1220
PO BOX 1221, MIDDLETOWN, CT 06457-1221
PO BOX 1222, MIDDLETOWN, CT 06457-1222
PO BOX 1223, MIDDLETOWN, CT 06457-1223
PO BOX 1224, MIDDLETOWN, CT 06457-1224
PO BOX 1225, MIDDLETOWN, CT 06457-1225
PO BOX 1226, MIDDLETOWN, CT 06457-1226
PO BOX 1227, MIDDLETOWN, CT 06457-1227
PO BOX 1228, MIDDLETOWN, CT 06457-1228
PO BOX 1229, MIDDLETOWN, CT 06457-1229
PO BOX 1230, MIDDLETOWN, CT 06457-1230
PO BOX 1231, MIDDLETOWN, CT 06457-1231
PO BOX 1232, MIDDLETOWN, CT 06457-1232
PO BOX 1233, MIDDLETOWN, CT 06457-1233
PO BOX 1234, MIDDLETOWN, CT 06457-1234
PO BOX 1235, MIDDLETOWN, CT 06457-1235
PO BOX 1236, MIDDLETOWN, CT 06457-1236
PO BOX 1237, MIDDLETOWN, CT 06457-1237
PO BOX 1238, MIDDLETOWN, CT 06457-1238
PO BOX 1239, MIDDLETOWN, CT 06457-1239
PO BOX 1240, MIDDLETOWN, CT 06457-1240
PO BOX 1241, MIDDLETOWN, CT 06457-1241
PO BOX 1242, MIDDLETOWN, CT 06457-1242
PO BOX 1243, MIDDLETOWN, CT 06457-1243
PO BOX 1244, MIDDLETOWN, CT 06457-1244
PO BOX 1245, MIDDLETOWN, CT 06457-1245
PO BOX 1246, MIDDLETOWN, CT 06457-1246
PO BOX 1247, MIDDLETOWN, CT 06457-1247
PO BOX 1248, MIDDLETOWN, CT 06457-1248
PO BOX 1249, MIDDLETOWN, CT 06457-1249
PO BOX 1250, MIDDLETOWN, CT 06457-1250
PO BOX 1251, MIDDLETOWN, CT 06457-1251
PO BOX 1252, MIDDLETOWN, CT 06457-1252
PO BOX 1253, MIDDLETOWN, CT 06457-1253
PO BOX 1254, MIDDLETOWN, CT 06457-1254
PO BOX 1255, MIDDLETOWN, CT 06457-1255
PO BOX 1256, MIDDLETOWN, CT 06457-1256
PO BOX 1257, MIDDLETOWN, CT 06457-1257
PO BOX 1258, MIDDLETOWN, CT 06457-1258
PO BOX 1259, MIDDLETOWN, CT 06457-1259
PO BOX 1260, MIDDLETOWN, CT 06457-1260
PO BOX 1261, MIDDLETOWN, CT 06457-1261
PO BOX 1262, MIDDLETOWN, CT 06457-1262
PO BOX 1263, MIDDLETOWN, CT 06457-1263
PO BOX 1264, MIDDLETOWN, CT 06457-1264
PO BOX 1265, MIDDLETOWN, CT 06457-1265
PO BOX 1266, MIDDLETOWN, CT 06457-1266
PO BOX 1267, MIDDLETOWN, CT 06457-1267
PO BOX 1268, MIDDLETOWN, CT 06457-1268
PO BOX 1269, MIDDLETOWN, CT 06457-1269
PO BOX 1270, MIDDLETOWN, CT 06457-1270
PO BOX 1271, MIDDLETOWN, CT 06457-1271
PO BOX 1272, MIDDLETOWN, CT 06457-1272
PO BOX 1273, MIDDLETOWN, CT 06457-1273
PO BOX 1274, MIDDLETOWN, CT 06457-1274
PO BOX 1275, MIDDLETOWN, CT 06457-1275
PO BOX 1276, MIDDLETOWN, CT 06457-1276
PO BOX 1277, MIDDLETOWN, CT 06457-1277
PO BOX 1278, MIDDLETOWN, CT 06457-1278
PO BOX 1279, MIDDLETOWN, CT 06457-1279
PO BOX 1280, MIDDLETOWN, CT 06457-1280
PO BOX 1281, MIDDLETOWN, CT 06457-1281
PO BOX 1282, MIDDLETOWN, CT 06457-1282
PO BOX 1283, MIDDLETOWN, CT 06457-1283
PO BOX 1284, MIDDLETOWN, CT 06457-1284
PO BOX 1285, MIDDLETOWN, CT 06457-1285
PO BOX 1286, MIDDLETOWN, CT 06457-1286
PO BOX 1287, MIDDLETOWN, CT 06457-1287
PO BOX 1288, MIDDLETOWN, CT 06457-1288
PO BOX 1289, MIDDLETOWN, CT 06457-1289
PO BOX 1290, MIDDLETOWN, CT 06457-1290
PO BOX 1291, MIDDLETOWN, CT 06457-1291
PO BOX 1292, MIDDLETOWN, CT 06457-1292
PO BOX 1293, MIDDLETOWN, CT 06457-1293
PO BOX 1294, MIDDLETOWN, CT 06457-1294
PO BOX 1295, MIDDLETOWN, CT 06457-1295
PO BOX 1296, MIDDLETOWN, CT 06457-1296
PO BOX 1297, MIDDLETOWN, CT 06457-1297
PO BOX 1298, MIDDLETOWN, CT 06457-1298
PO BOX 1299, MIDDLETOWN, CT 06457-1299
PO BOX 1300, MIDDLETOWN, CT 06457-1300
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