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 11201, FORT LAUDERDALE, FL 33339-1201
PO BOX 11202, FORT LAUDERDALE, FL 33339-1202
PO BOX 11203, FORT LAUDERDALE, FL 33339-1203
PO BOX 11204, FORT LAUDERDALE, FL 33339-1204
PO BOX 11205, FORT LAUDERDALE, FL 33339-1205
PO BOX 11206, FORT LAUDERDALE, FL 33339-1206
PO BOX 11207, FORT LAUDERDALE, FL 33339-1207
PO BOX 11208, FORT LAUDERDALE, FL 33339-1208
PO BOX 11209, FORT LAUDERDALE, FL 33339-1209
PO BOX 11210, FORT LAUDERDALE, FL 33339-1210
PO BOX 11211, FORT LAUDERDALE, FL 33339-1211
PO BOX 11212, FORT LAUDERDALE, FL 33339-1212
PO BOX 11213, FORT LAUDERDALE, FL 33339-1213
PO BOX 11214, FORT LAUDERDALE, FL 33339-1214
PO BOX 11215, FORT LAUDERDALE, FL 33339-1215
PO BOX 11216, FORT LAUDERDALE, FL 33339-1216
PO BOX 11217, FORT LAUDERDALE, FL 33339-1217
PO BOX 11218, FORT LAUDERDALE, FL 33339-1218
PO BOX 11219, FORT LAUDERDALE, FL 33339-1219
PO BOX 11220, FORT LAUDERDALE, FL 33339-1220
PO BOX 11221, FORT LAUDERDALE, FL 33339-1221
PO BOX 11222, FORT LAUDERDALE, FL 33339-1222
PO BOX 11223, FORT LAUDERDALE, FL 33339-1223
PO BOX 11224, FORT LAUDERDALE, FL 33339-1224
PO BOX 11225, FORT LAUDERDALE, FL 33339-1225
PO BOX 11226, FORT LAUDERDALE, FL 33339-1226
PO BOX 11227, FORT LAUDERDALE, FL 33339-1227
PO BOX 11228, FORT LAUDERDALE, FL 33339-1228
PO BOX 11229, FORT LAUDERDALE, FL 33339-1229
PO BOX 11230, FORT LAUDERDALE, FL 33339-1230
PO BOX 11231, FORT LAUDERDALE, FL 33339-1231
PO BOX 11232, FORT LAUDERDALE, FL 33339-1232
PO BOX 11233, FORT LAUDERDALE, FL 33339-1233
PO BOX 11234, FORT LAUDERDALE, FL 33339-1234
PO BOX 11235, FORT LAUDERDALE, FL 33339-1235
PO BOX 11236, FORT LAUDERDALE, FL 33339-1236
PO BOX 11237, FORT LAUDERDALE, FL 33339-1237
PO BOX 11238, FORT LAUDERDALE, FL 33339-1238
PO BOX 11239, FORT LAUDERDALE, FL 33339-1239
PO BOX 11240, FORT LAUDERDALE, FL 33339-1240
PO BOX 11241, FORT LAUDERDALE, FL 33339-1241
PO BOX 11242, FORT LAUDERDALE, FL 33339-1242
PO BOX 11243, FORT LAUDERDALE, FL 33339-1243
PO BOX 11244, FORT LAUDERDALE, FL 33339-1244
PO BOX 11245, FORT LAUDERDALE, FL 33339-1245
PO BOX 11246, FORT LAUDERDALE, FL 33339-1246
PO BOX 11247, FORT LAUDERDALE, FL 33339-1247
PO BOX 11248, FORT LAUDERDALE, FL 33339-1248
PO BOX 11249, FORT LAUDERDALE, FL 33339-1249
PO BOX 11250, FORT LAUDERDALE, FL 33339-1250
PO BOX 11251, FORT LAUDERDALE, FL 33339-1251
PO BOX 11252, FORT LAUDERDALE, FL 33339-1252
PO BOX 11253, FORT LAUDERDALE, FL 33339-1253
PO BOX 11254, FORT LAUDERDALE, FL 33339-1254
PO BOX 11255, FORT LAUDERDALE, FL 33339-1255
PO BOX 11256, FORT LAUDERDALE, FL 33339-1256
PO BOX 11257, FORT LAUDERDALE, FL 33339-1257
PO BOX 11258, FORT LAUDERDALE, FL 33339-1258
PO BOX 11259, FORT LAUDERDALE, FL 33339-1259
PO BOX 11260, FORT LAUDERDALE, FL 33339-1260
PO BOX 11261, FORT LAUDERDALE, FL 33339-1261
PO BOX 11262, FORT LAUDERDALE, FL 33339-1262
PO BOX 11263, FORT LAUDERDALE, FL 33339-1263
PO BOX 11264, FORT LAUDERDALE, FL 33339-1264
PO BOX 11265, FORT LAUDERDALE, FL 33339-1265
PO BOX 11266, FORT LAUDERDALE, FL 33339-1266
PO BOX 11267, FORT LAUDERDALE, FL 33339-1267
PO BOX 11268, FORT LAUDERDALE, FL 33339-1268
PO BOX 11269, FORT LAUDERDALE, FL 33339-1269
PO BOX 11270, FORT LAUDERDALE, FL 33339-1270
PO BOX 11271, FORT LAUDERDALE, FL 33339-1271
PO BOX 11272, FORT LAUDERDALE, FL 33339-1272
PO BOX 11273, FORT LAUDERDALE, FL 33339-1273
PO BOX 11274, FORT LAUDERDALE, FL 33339-1274
PO BOX 11275, FORT LAUDERDALE, FL 33339-1275
PO BOX 11276, FORT LAUDERDALE, FL 33339-1276
PO BOX 11277, FORT LAUDERDALE, FL 33339-1277
PO BOX 11278, FORT LAUDERDALE, FL 33339-1278
PO BOX 11279, FORT LAUDERDALE, FL 33339-1279
PO BOX 11280, FORT LAUDERDALE, FL 33339-1280
PO BOX 11281, FORT LAUDERDALE, FL 33339-1281
PO BOX 11282, FORT LAUDERDALE, FL 33339-1282
PO BOX 11283, FORT LAUDERDALE, FL 33339-1283
PO BOX 11284, FORT LAUDERDALE, FL 33339-1284
PO BOX 11285, FORT LAUDERDALE, FL 33339-1285
PO BOX 11286, FORT LAUDERDALE, FL 33339-1286
PO BOX 11287, FORT LAUDERDALE, FL 33339-1287
PO BOX 11288, FORT LAUDERDALE, FL 33339-1288
PO BOX 11289, FORT LAUDERDALE, FL 33339-1289
PO BOX 11290, FORT LAUDERDALE, FL 33339-1290
PO BOX 11291, FORT LAUDERDALE, FL 33339-1291
PO BOX 11292, FORT LAUDERDALE, FL 33339-1292
PO BOX 11293, FORT LAUDERDALE, FL 33339-1293
PO BOX 11294, FORT LAUDERDALE, FL 33339-1294
PO BOX 11295, FORT LAUDERDALE, FL 33339-1295
PO BOX 11296, FORT LAUDERDALE, FL 33339-1296
PO BOX 11297, FORT LAUDERDALE, FL 33339-1297
PO BOX 11298, FORT LAUDERDALE, FL 33339-1298
PO BOX 11299, FORT LAUDERDALE, FL 33339-1299
PO BOX 11300, FORT LAUDERDALE, FL 33339-1300
PO BOX 11301, FORT LAUDERDALE, FL 33339-1301
PO BOX 11302, FORT LAUDERDALE, FL 33339-1302
PO BOX 11303, FORT LAUDERDALE, FL 33339-1303
PO BOX 11304, FORT LAUDERDALE, FL 33339-1304
PO BOX 11305, FORT LAUDERDALE, FL 33339-1305
PO BOX 11306, FORT LAUDERDALE, FL 33339-1306
PO BOX 11307, FORT LAUDERDALE, FL 33339-1307
PO BOX 11308, FORT LAUDERDALE, FL 33339-1308
PO BOX 11309, FORT LAUDERDALE, FL 33339-1309
PO BOX 11310, FORT LAUDERDALE, FL 33339-1310
PO BOX 11311, FORT LAUDERDALE, FL 33339-1311
PO BOX 11312, FORT LAUDERDALE, FL 33339-1312
PO BOX 11313, FORT LAUDERDALE, FL 33339-1313
PO BOX 11314, FORT LAUDERDALE, FL 33339-1314
PO BOX 11315, FORT LAUDERDALE, FL 33339-1315
PO BOX 11316, FORT LAUDERDALE, FL 33339-1316
PO BOX 11317, FORT LAUDERDALE, FL 33339-1317
PO BOX 11318, FORT LAUDERDALE, FL 33339-1318
PO BOX 11319, FORT LAUDERDALE, FL 33339-1319
PO BOX 11320, FORT LAUDERDALE, FL 33339-1320
PO BOX 11321, FORT LAUDERDALE, FL 33339-1321
PO BOX 11322, FORT LAUDERDALE, FL 33339-1322
PO BOX 11323, FORT LAUDERDALE, FL 33339-1323
PO BOX 11324, FORT LAUDERDALE, FL 33339-1324
PO BOX 11325, FORT LAUDERDALE, FL 33339-1325
PO BOX 11326, FORT LAUDERDALE, FL 33339-1326
PO BOX 11327, FORT LAUDERDALE, FL 33339-1327
PO BOX 11328, FORT LAUDERDALE, FL 33339-1328
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