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 1141, MIAMI, OK 74355-1141
PO BOX 1142, MIAMI, OK 74355-1142
PO BOX 1143, MIAMI, OK 74355-1143
PO BOX 1144, MIAMI, OK 74355-1144
PO BOX 1145, MIAMI, OK 74355-1145
PO BOX 1146, MIAMI, OK 74355-1146
PO BOX 1147, MIAMI, OK 74355-1147
PO BOX 1148, MIAMI, OK 74355-1148
PO BOX 1149, MIAMI, OK 74355-1149
PO BOX 1150, MIAMI, OK 74355-1150
PO BOX 1151, MIAMI, OK 74355-1151
PO BOX 1152, MIAMI, OK 74355-1152
PO BOX 1153, MIAMI, OK 74355-1153
PO BOX 1154, MIAMI, OK 74355-1154
PO BOX 1155, MIAMI, OK 74355-1155
PO BOX 1156, MIAMI, OK 74355-1156
PO BOX 1157, MIAMI, OK 74355-1157
PO BOX 1158, MIAMI, OK 74355-1158
PO BOX 1159, MIAMI, OK 74355-1159
PO BOX 1160, MIAMI, OK 74355-1160
PO BOX 1161, MIAMI, OK 74355-1161
PO BOX 1162, MIAMI, OK 74355-1162
PO BOX 1163, MIAMI, OK 74355-1163
PO BOX 1164, MIAMI, OK 74355-1164
PO BOX 1165, MIAMI, OK 74355-1165
PO BOX 1166, MIAMI, OK 74355-1166
PO BOX 1167, MIAMI, OK 74355-1167
PO BOX 1168, MIAMI, OK 74355-1168
PO BOX 1169, MIAMI, OK 74355-1169
PO BOX 1170, MIAMI, OK 74355-1170
PO BOX 1171, MIAMI, OK 74355-1171
PO BOX 1172, MIAMI, OK 74355-1172
PO BOX 1173, MIAMI, OK 74355-1173
PO BOX 1174, MIAMI, OK 74355-1174
PO BOX 1175, MIAMI, OK 74355-1175
PO BOX 1176, MIAMI, OK 74355-1176
PO BOX 1177, MIAMI, OK 74355-1177
PO BOX 1178, MIAMI, OK 74355-1178
PO BOX 1179, MIAMI, OK 74355-1179
PO BOX 1180, MIAMI, OK 74355-1180
PO BOX 1181, MIAMI, OK 74355-1181
PO BOX 1182, MIAMI, OK 74355-1182
PO BOX 1183, MIAMI, OK 74355-1183
PO BOX 1184, MIAMI, OK 74355-1184
PO BOX 1185, MIAMI, OK 74355-1185
PO BOX 1186, MIAMI, OK 74355-1186
PO BOX 1187, MIAMI, OK 74355-1187
PO BOX 1188, MIAMI, OK 74355-1188
PO BOX 1189, MIAMI, OK 74355-1189
PO BOX 1190, MIAMI, OK 74355-1190
PO BOX 1191, MIAMI, OK 74355-1191
PO BOX 1192, MIAMI, OK 74355-1192
PO BOX 1193, MIAMI, OK 74355-1193
PO BOX 1194, MIAMI, OK 74355-1194
PO BOX 1195, MIAMI, OK 74355-1195
PO BOX 1196, MIAMI, OK 74355-1196
PO BOX 1197, MIAMI, OK 74355-1197
PO BOX 1198, MIAMI, OK 74355-1198
PO BOX 1199, MIAMI, OK 74355-1199
PO BOX 1200, MIAMI, OK 74355-1200
PO BOX 1201, MIAMI, OK 74355-1201
PO BOX 1202, MIAMI, OK 74355-1202
PO BOX 1203, MIAMI, OK 74355-1203
PO BOX 1204, MIAMI, OK 74355-1204
PO BOX 1205, MIAMI, OK 74355-1205
PO BOX 1206, MIAMI, OK 74355-1206
PO BOX 1207, MIAMI, OK 74355-1207
PO BOX 1208, MIAMI, OK 74355-1208
PO BOX 1209, MIAMI, OK 74355-1209
PO BOX 1210, MIAMI, OK 74355-1210
PO BOX 1211, MIAMI, OK 74355-1211
PO BOX 1212, MIAMI, OK 74355-1212
PO BOX 1213, MIAMI, OK 74355-1213
PO BOX 1214, MIAMI, OK 74355-1214
PO BOX 1215, MIAMI, OK 74355-1215
PO BOX 1216, MIAMI, OK 74355-1216
PO BOX 1217, MIAMI, OK 74355-1217
PO BOX 1218, MIAMI, OK 74355-1218
PO BOX 1219, MIAMI, OK 74355-1219
PO BOX 1220, MIAMI, OK 74355-1220
PO BOX 1221, MIAMI, OK 74355-1221
PO BOX 1222, MIAMI, OK 74355-1222
PO BOX 1223, MIAMI, OK 74355-1223
PO BOX 1224, MIAMI, OK 74355-1224
PO BOX 1225, MIAMI, OK 74355-1225
PO BOX 1226, MIAMI, OK 74355-1226
PO BOX 1227, MIAMI, OK 74355-1227
PO BOX 1228, MIAMI, OK 74355-1228
PO BOX 1229, MIAMI, OK 74355-1229
PO BOX 1230, MIAMI, OK 74355-1230
PO BOX 1231, MIAMI, OK 74355-1231
PO BOX 1232, MIAMI, OK 74355-1232
PO BOX 1233, MIAMI, OK 74355-1233
PO BOX 1234, MIAMI, OK 74355-1234
PO BOX 1235, MIAMI, OK 74355-1235
PO BOX 1236, MIAMI, OK 74355-1236
PO BOX 1237, MIAMI, OK 74355-1237
PO BOX 1238, MIAMI, OK 74355-1238
PO BOX 1239, MIAMI, OK 74355-1239
PO BOX 1240, MIAMI, OK 74355-1240
PO BOX 1241, MIAMI, OK 74355-1241
PO BOX 1242, MIAMI, OK 74355-1242
PO BOX 1243, MIAMI, OK 74355-1243
PO BOX 1244, MIAMI, OK 74355-1244
PO BOX 1245, MIAMI, OK 74355-1245
PO BOX 1246, MIAMI, OK 74355-1246
PO BOX 1247, MIAMI, OK 74355-1247
PO BOX 1248, MIAMI, OK 74355-1248
PO BOX 1249, MIAMI, OK 74355-1249
PO BOX 1250, MIAMI, OK 74355-1250
PO BOX 1251, MIAMI, OK 74355-1251
PO BOX 1252, MIAMI, OK 74355-1252
PO BOX 1253, MIAMI, OK 74355-1253
PO BOX 1254, MIAMI, OK 74355-1254
PO BOX 1255, MIAMI, OK 74355-1255
PO BOX 1256, MIAMI, OK 74355-1256
PO BOX 1257, MIAMI, OK 74355-1257
PO BOX 1258, MIAMI, OK 74355-1258
PO BOX 1259, MIAMI, OK 74355-1259
PO BOX 1260, MIAMI, OK 74355-1260
PO BOX 1261, MIAMI, OK 74355-1261
PO BOX 1262, MIAMI, OK 74355-1262
PO BOX 1263, MIAMI, OK 74355-1263
PO BOX 1264, MIAMI, OK 74355-1264
PO BOX 1265, MIAMI, OK 74355-1265
PO BOX 1266, MIAMI, OK 74355-1266
PO BOX 1267, MIAMI, OK 74355-1267
PO BOX 1268, MIAMI, OK 74355-1268
PO BOX 1269, MIAMI, OK 74355-1269
PO BOX 1270, MIAMI, OK 74355-1270
PO BOX 1271, MIAMI, OK 74355-1271
PO BOX 1272, MIAMI, OK 74355-1272
PO BOX 1273, MIAMI, OK 74355-1273
PO BOX 1274, MIAMI, OK 74355-1274
PO BOX 1275, MIAMI, OK 74355-1275
PO BOX 1276, MIAMI, OK 74355-1276
PO BOX 1277, MIAMI, OK 74355-1277
PO BOX 1278, MIAMI, OK 74355-1278
PO BOX 1279, MIAMI, OK 74355-1279
PO BOX 1280, MIAMI, OK 74355-1280
PO BOX 1281, MIAMI, OK 74355-1281
PO BOX 1282, MIAMI, OK 74355-1282
PO BOX 1283, MIAMI, OK 74355-1283
PO BOX 1284, MIAMI, OK 74355-1284
PO BOX 1285, MIAMI, OK 74355-1285
PO BOX 1286, MIAMI, OK 74355-1286
PO BOX 1287, MIAMI, OK 74355-1287
PO BOX 1288, MIAMI, OK 74355-1288
PO BOX 1289, MIAMI, OK 74355-1289
PO BOX 1290, MIAMI, OK 74355-1290
PO BOX 1291, MIAMI, OK 74355-1291
PO BOX 1292, MIAMI, OK 74355-1292
PO BOX 1293, MIAMI, OK 74355-1293
PO BOX 1294, MIAMI, OK 74355-1294
PO BOX 1295, MIAMI, OK 74355-1295
PO BOX 1296, MIAMI, OK 74355-1296
PO BOX 1297, MIAMI, OK 74355-1297
PO BOX 1298, MIAMI, OK 74355-1298
PO BOX 1299, MIAMI, OK 74355-1299
PO BOX 1300, MIAMI, OK 74355-1300
PO BOX 1301, MIAMI, OK 74355-1301
PO BOX 1302, MIAMI, OK 74355-1302
PO BOX 1303, MIAMI, OK 74355-1303
PO BOX 1304, MIAMI, OK 74355-1304
PO BOX 1305, MIAMI, OK 74355-1305
PO BOX 1306, MIAMI, OK 74355-1306
PO BOX 1307, MIAMI, OK 74355-1307
PO BOX 1308, MIAMI, OK 74355-1308
PO BOX 1309, MIAMI, OK 74355-1309
PO BOX 1310, MIAMI, OK 74355-1310
PO BOX 1311, MIAMI, OK 74355-1311
PO BOX 1312, MIAMI, OK 74355-1312
PO BOX 1313, MIAMI, OK 74355-1313
PO BOX 1314, MIAMI, OK 74355-1314
PO BOX 1315, MIAMI, OK 74355-1315
PO BOX 1316, MIAMI, OK 74355-1316
PO BOX 1317, MIAMI, OK 74355-1317
PO BOX 1318, MIAMI, OK 74355-1318
PO BOX 1319, MIAMI, OK 74355-1319
PO BOX 1320, MIAMI, OK 74355-1320
PO BOX 1321, MIAMI, OK 74355-1321
PO BOX 1322, MIAMI, OK 74355-1322
PO BOX 1323, MIAMI, OK 74355-1323
PO BOX 1324, MIAMI, OK 74355-1324
PO BOX 1325, MIAMI, OK 74355-1325
PO BOX 1326, MIAMI, OK 74355-1326
PO BOX 1327, MIAMI, OK 74355-1327
PO BOX 1328, MIAMI, OK 74355-1328
PO BOX 1329, MIAMI, OK 74355-1329
PO BOX 1330, MIAMI, OK 74355-1330
PO BOX 1331, MIAMI, OK 74355-1331
PO BOX 1332, MIAMI, OK 74355-1332
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