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, PALMER LAKE, CO 80133-1121
PO BOX 1122, PALMER LAKE, CO 80133-1122
PO BOX 1123, PALMER LAKE, CO 80133-1123
PO BOX 1124, PALMER LAKE, CO 80133-1124
PO BOX 1125, PALMER LAKE, CO 80133-1125
PO BOX 1126, PALMER LAKE, CO 80133-1126
PO BOX 1127, PALMER LAKE, CO 80133-1127
PO BOX 1128, PALMER LAKE, CO 80133-1128
PO BOX 1129, PALMER LAKE, CO 80133-1129
PO BOX 1130, PALMER LAKE, CO 80133-1130
PO BOX 1131, PALMER LAKE, CO 80133-1131
PO BOX 1132, PALMER LAKE, CO 80133-1132
PO BOX 1133, PALMER LAKE, CO 80133-1133
PO BOX 1134, PALMER LAKE, CO 80133-1134
PO BOX 1135, PALMER LAKE, CO 80133-1135
PO BOX 1136, PALMER LAKE, CO 80133-1136
PO BOX 1137, PALMER LAKE, CO 80133-1137
PO BOX 1138, PALMER LAKE, CO 80133-1138
PO BOX 1139, PALMER LAKE, CO 80133-1139
PO BOX 1140, PALMER LAKE, CO 80133-1140
PO BOX 1141, PALMER LAKE, CO 80133-1141
PO BOX 1142, PALMER LAKE, CO 80133-1142
PO BOX 1143, PALMER LAKE, CO 80133-1143
PO BOX 1144, PALMER LAKE, CO 80133-1144
PO BOX 1145, PALMER LAKE, CO 80133-1145
PO BOX 1146, PALMER LAKE, CO 80133-1146
PO BOX 1147, PALMER LAKE, CO 80133-1147
PO BOX 1148, PALMER LAKE, CO 80133-1148
PO BOX 1149, PALMER LAKE, CO 80133-1149
PO BOX 1150, PALMER LAKE, CO 80133-1150
PO BOX 1151, PALMER LAKE, CO 80133-1151
PO BOX 1152, PALMER LAKE, CO 80133-1152
PO BOX 1153, PALMER LAKE, CO 80133-1153
PO BOX 1154, PALMER LAKE, CO 80133-1154
PO BOX 1155, PALMER LAKE, CO 80133-1155
PO BOX 1156, PALMER LAKE, CO 80133-1156
PO BOX 1157, PALMER LAKE, CO 80133-1157
PO BOX 1158, PALMER LAKE, CO 80133-1158
PO BOX 1159, PALMER LAKE, CO 80133-1159
PO BOX 1160, PALMER LAKE, CO 80133-1160
PO BOX 1161, PALMER LAKE, CO 80133-1161
PO BOX 1162, PALMER LAKE, CO 80133-1162
PO BOX 1163, PALMER LAKE, CO 80133-1163
PO BOX 1164, PALMER LAKE, CO 80133-1164
PO BOX 1165, PALMER LAKE, CO 80133-1165
PO BOX 1166, PALMER LAKE, CO 80133-1166
PO BOX 1167, PALMER LAKE, CO 80133-1167
PO BOX 1168, PALMER LAKE, CO 80133-1168
PO BOX 1169, PALMER LAKE, CO 80133-1169
PO BOX 1170, PALMER LAKE, CO 80133-1170
PO BOX 1171, PALMER LAKE, CO 80133-1171
PO BOX 1172, PALMER LAKE, CO 80133-1172
PO BOX 1173, PALMER LAKE, CO 80133-1173
PO BOX 1174, PALMER LAKE, CO 80133-1174
PO BOX 1175, PALMER LAKE, CO 80133-1175
PO BOX 1176, PALMER LAKE, CO 80133-1176
PO BOX 1177, PALMER LAKE, CO 80133-1177
PO BOX 1178, PALMER LAKE, CO 80133-1178
PO BOX 1179, PALMER LAKE, CO 80133-1179
PO BOX 1180, PALMER LAKE, CO 80133-1180
PO BOX 1181, PALMER LAKE, CO 80133-1181
PO BOX 1182, PALMER LAKE, CO 80133-1182
PO BOX 1183, PALMER LAKE, CO 80133-1183
PO BOX 1184, PALMER LAKE, CO 80133-1184
PO BOX 1185, PALMER LAKE, CO 80133-1185
PO BOX 1186, PALMER LAKE, CO 80133-1186
PO BOX 1187, PALMER LAKE, CO 80133-1187
PO BOX 1188, PALMER LAKE, CO 80133-1188
PO BOX 1189, PALMER LAKE, CO 80133-1189
PO BOX 1190, PALMER LAKE, CO 80133-1190
PO BOX 1191, PALMER LAKE, CO 80133-1191
PO BOX 1192, PALMER LAKE, CO 80133-1192
PO BOX 1193, PALMER LAKE, CO 80133-1193
PO BOX 1194, PALMER LAKE, CO 80133-1194
PO BOX 1195, PALMER LAKE, CO 80133-1195
PO BOX 1196, PALMER LAKE, CO 80133-1196
PO BOX 1197, PALMER LAKE, CO 80133-1197
PO BOX 1198, PALMER LAKE, CO 80133-1198
PO BOX 1199, PALMER LAKE, CO 80133-1199
PO BOX 1200, PALMER LAKE, CO 80133-1200
PO BOX 1201, PALMER LAKE, CO 80133-1201
PO BOX 1202, PALMER LAKE, CO 80133-1202
PO BOX 1203, PALMER LAKE, CO 80133-1203
PO BOX 1204, PALMER LAKE, CO 80133-1204
PO BOX 1205, PALMER LAKE, CO 80133-1205
PO BOX 1206, PALMER LAKE, CO 80133-1206
PO BOX 1207, PALMER LAKE, CO 80133-1207
PO BOX 1208, PALMER LAKE, CO 80133-1208
PO BOX 1209, PALMER LAKE, CO 80133-1209
PO BOX 1210, PALMER LAKE, CO 80133-1210
PO BOX 1211, PALMER LAKE, CO 80133-1211
PO BOX 1212, PALMER LAKE, CO 80133-1212
PO BOX 1213, PALMER LAKE, CO 80133-1213
PO BOX 1214, PALMER LAKE, CO 80133-1214
PO BOX 1215, PALMER LAKE, CO 80133-1215
PO BOX 1216, PALMER LAKE, CO 80133-1216
PO BOX 1217, PALMER LAKE, CO 80133-1217
PO BOX 1218, PALMER LAKE, CO 80133-1218
PO BOX 1219, PALMER LAKE, CO 80133-1219
PO BOX 1220, PALMER LAKE, CO 80133-1220
PO BOX 1221, PALMER LAKE, CO 80133-1221
PO BOX 1222, PALMER LAKE, CO 80133-1222
PO BOX 1223, PALMER LAKE, CO 80133-1223
PO BOX 1224, PALMER LAKE, CO 80133-1224
PO BOX 1225, PALMER LAKE, CO 80133-1225
PO BOX 1226, PALMER LAKE, CO 80133-1226
PO BOX 1227, PALMER LAKE, CO 80133-1227
PO BOX 1228, PALMER LAKE, CO 80133-1228
PO BOX 1229, PALMER LAKE, CO 80133-1229
PO BOX 1230, PALMER LAKE, CO 80133-1230
PO BOX 1231, PALMER LAKE, CO 80133-1231
PO BOX 1232, PALMER LAKE, CO 80133-1232
PO BOX 1233, PALMER LAKE, CO 80133-1233
PO BOX 1234, PALMER LAKE, CO 80133-1234
PO BOX 1235, PALMER LAKE, CO 80133-1235
PO BOX 1236, PALMER LAKE, CO 80133-1236
PO BOX 1237, PALMER LAKE, CO 80133-1237
PO BOX 1238, PALMER LAKE, CO 80133-1238
PO BOX 1239, PALMER LAKE, CO 80133-1239
PO BOX 1240, PALMER LAKE, CO 80133-1240
PO BOX 1241, PALMER LAKE, CO 80133-1241
PO BOX 1242, PALMER LAKE, CO 80133-1242
PO BOX 1243, PALMER LAKE, CO 80133-1243
PO BOX 1244, PALMER LAKE, CO 80133-1244
PO BOX 1245, PALMER LAKE, CO 80133-1245
PO BOX 1246, PALMER LAKE, CO 80133-1246
PO BOX 1247, PALMER LAKE, CO 80133-1247
PO BOX 1248, PALMER LAKE, CO 80133-1248
PO BOX 1249, PALMER LAKE, CO 80133-1249
PO BOX 1250, PALMER LAKE, CO 80133-1250
PO BOX 1251, PALMER LAKE, CO 80133-1251
PO BOX 1252, PALMER LAKE, CO 80133-1252
PO BOX 1253, PALMER LAKE, CO 80133-1253
PO BOX 1254, PALMER LAKE, CO 80133-1254
PO BOX 1255, PALMER LAKE, CO 80133-1255
PO BOX 1256, PALMER LAKE, CO 80133-1256
PO BOX 1257, PALMER LAKE, CO 80133-1257
PO BOX 1258, PALMER LAKE, CO 80133-1258
PO BOX 1259, PALMER LAKE, CO 80133-1259
PO BOX 1260, PALMER LAKE, CO 80133-1260
PO BOX 1261, PALMER LAKE, CO 80133-1261
PO BOX 1262, PALMER LAKE, CO 80133-1262
PO BOX 1263, PALMER LAKE, CO 80133-1263
PO BOX 1264, PALMER LAKE, CO 80133-1264
PO BOX 1265, PALMER LAKE, CO 80133-1265
PO BOX 1266, PALMER LAKE, CO 80133-1266
PO BOX 1267, PALMER LAKE, CO 80133-1267
PO BOX 1268, PALMER LAKE, CO 80133-1268
PO BOX 1269, PALMER LAKE, CO 80133-1269
PO BOX 1270, PALMER LAKE, CO 80133-1270
PO BOX 1271, PALMER LAKE, CO 80133-1271
PO BOX 1272, PALMER LAKE, CO 80133-1272
PO BOX 1273, PALMER LAKE, CO 80133-1273
PO BOX 1274, PALMER LAKE, CO 80133-1274
PO BOX 1275, PALMER LAKE, CO 80133-1275
PO BOX 1276, PALMER LAKE, CO 80133-1276
PO BOX 1277, PALMER LAKE, CO 80133-1277
PO BOX 1278, PALMER LAKE, CO 80133-1278
PO BOX 1279, PALMER LAKE, CO 80133-1279
PO BOX 1280, PALMER LAKE, CO 80133-1280
PO BOX 1281, PALMER LAKE, CO 80133-1281
PO BOX 1282, PALMER LAKE, CO 80133-1282
PO BOX 1283, PALMER LAKE, CO 80133-1283
PO BOX 1284, PALMER LAKE, CO 80133-1284
PO BOX 1285, PALMER LAKE, CO 80133-1285
PO BOX 1286, PALMER LAKE, CO 80133-1286
PO BOX 1287, PALMER LAKE, CO 80133-1287
PO BOX 1288, PALMER LAKE, CO 80133-1288
PO BOX 1289, PALMER LAKE, CO 80133-1289
PO BOX 1290, PALMER LAKE, CO 80133-1290
PO BOX 1291, PALMER LAKE, CO 80133-1291
PO BOX 1292, PALMER LAKE, CO 80133-1292
PO BOX 1293, PALMER LAKE, CO 80133-1293
PO BOX 1294, PALMER LAKE, CO 80133-1294
PO BOX 1295, PALMER LAKE, CO 80133-1295
PO BOX 1296, PALMER LAKE, CO 80133-1296
PO BOX 1297, PALMER LAKE, CO 80133-1297
PO BOX 1298, PALMER LAKE, CO 80133-1298
PO BOX 1299, PALMER LAKE, CO 80133-1299
PO BOX 1300, PALMER LAKE, CO 80133-1300
PO BOX 1301, PALMER LAKE, CO 80133-1301
PO BOX 1302, PALMER LAKE, CO 80133-1302
PO BOX 1303, PALMER LAKE, CO 80133-1303
PO BOX 1304, PALMER LAKE, CO 80133-1304
PO BOX 1305, PALMER LAKE, CO 80133-1305
PO BOX 1306, PALMER LAKE, CO 80133-1306
PO BOX 1307, PALMER LAKE, CO 80133-1307
PO BOX 1308, PALMER LAKE, CO 80133-1308
PO BOX 1309, PALMER LAKE, CO 80133-1309
PO BOX 1310, PALMER LAKE, CO 80133-1310
PO BOX 1311, PALMER LAKE, CO 80133-1311
PO BOX 1312, PALMER LAKE, CO 80133-1312
PO BOX 1313, PALMER LAKE, CO 80133-1313
PO BOX 1314, PALMER LAKE, CO 80133-1314
PO BOX 1315, PALMER LAKE, CO 80133-1315
PO BOX 1316, PALMER LAKE, CO 80133-1316
PO BOX 1317, PALMER LAKE, CO 80133-1317
PO BOX 1318, PALMER LAKE, CO 80133-1318
PO BOX 1319, PALMER LAKE, CO 80133-1319
PO BOX 1320, PALMER LAKE, CO 80133-1320
PO BOX 1321, PALMER LAKE, CO 80133-1321
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