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 241, FORT LAUDERDALE, FL 33302-0241
PO BOX 242, FORT LAUDERDALE, FL 33302-0242
PO BOX 243, FORT LAUDERDALE, FL 33302-0243
PO BOX 244, FORT LAUDERDALE, FL 33302-0244
PO BOX 245, FORT LAUDERDALE, FL 33302-0245
PO BOX 246, FORT LAUDERDALE, FL 33302-0246
PO BOX 247, FORT LAUDERDALE, FL 33302-0247
PO BOX 248, FORT LAUDERDALE, FL 33302-0248
PO BOX 249, FORT LAUDERDALE, FL 33302-0249
PO BOX 250, FORT LAUDERDALE, FL 33302-0250
PO BOX 251, FORT LAUDERDALE, FL 33302-0251
PO BOX 252, FORT LAUDERDALE, FL 33302-0252
PO BOX 253, FORT LAUDERDALE, FL 33302-0253
PO BOX 254, FORT LAUDERDALE, FL 33302-0254
PO BOX 255, FORT LAUDERDALE, FL 33302-0255
PO BOX 256, FORT LAUDERDALE, FL 33302-0256
PO BOX 257, FORT LAUDERDALE, FL 33302-0257
PO BOX 258, FORT LAUDERDALE, FL 33302-0258
PO BOX 259, FORT LAUDERDALE, FL 33302-0259
PO BOX 260, FORT LAUDERDALE, FL 33302-0260
PO BOX 261, FORT LAUDERDALE, FL 33302-0261
PO BOX 262, FORT LAUDERDALE, FL 33302-0262
PO BOX 263, FORT LAUDERDALE, FL 33302-0263
PO BOX 264, FORT LAUDERDALE, FL 33302-0264
PO BOX 265, FORT LAUDERDALE, FL 33302-0265
PO BOX 266, FORT LAUDERDALE, FL 33302-0266
PO BOX 267, FORT LAUDERDALE, FL 33302-0267
PO BOX 268, FORT LAUDERDALE, FL 33302-0268
PO BOX 269, FORT LAUDERDALE, FL 33302-0269
PO BOX 270, FORT LAUDERDALE, FL 33302-0270
PO BOX 271, FORT LAUDERDALE, FL 33302-0271
PO BOX 272, FORT LAUDERDALE, FL 33302-0272
PO BOX 273, FORT LAUDERDALE, FL 33302-0273
PO BOX 274, FORT LAUDERDALE, FL 33302-0274
PO BOX 275, FORT LAUDERDALE, FL 33302-0275
PO BOX 276, FORT LAUDERDALE, FL 33302-0276
PO BOX 277, FORT LAUDERDALE, FL 33302-0277
PO BOX 278, FORT LAUDERDALE, FL 33302-0278
PO BOX 279, FORT LAUDERDALE, FL 33302-0279
PO BOX 280, FORT LAUDERDALE, FL 33302-0280
PO BOX 281, FORT LAUDERDALE, FL 33302-0281
PO BOX 282, FORT LAUDERDALE, FL 33302-0282
PO BOX 283, FORT LAUDERDALE, FL 33302-0283
PO BOX 284, FORT LAUDERDALE, FL 33302-0284
PO BOX 285, FORT LAUDERDALE, FL 33302-0285
PO BOX 286, FORT LAUDERDALE, FL 33302-0286
PO BOX 287, FORT LAUDERDALE, FL 33302-0287
PO BOX 288, FORT LAUDERDALE, FL 33302-0288
PO BOX 289, FORT LAUDERDALE, FL 33302-0289
PO BOX 290, FORT LAUDERDALE, FL 33302-0290
PO BOX 291, FORT LAUDERDALE, FL 33302-0291
PO BOX 292, FORT LAUDERDALE, FL 33302-0292
PO BOX 293, FORT LAUDERDALE, FL 33302-0293
PO BOX 294, FORT LAUDERDALE, FL 33302-0294
PO BOX 295, FORT LAUDERDALE, FL 33302-0295
PO BOX 296, FORT LAUDERDALE, FL 33302-0296
PO BOX 297, FORT LAUDERDALE, FL 33302-0297
PO BOX 298, FORT LAUDERDALE, FL 33302-0298
PO BOX 299, FORT LAUDERDALE, FL 33302-0299
PO BOX 300, FORT LAUDERDALE, FL 33302-0300
PO BOX 301, FORT LAUDERDALE, FL 33302-0301
PO BOX 302, FORT LAUDERDALE, FL 33302-0302
PO BOX 303, FORT LAUDERDALE, FL 33302-0303
PO BOX 304, FORT LAUDERDALE, FL 33302-0304
PO BOX 305, FORT LAUDERDALE, FL 33302-0305
PO BOX 306, FORT LAUDERDALE, FL 33302-0306
PO BOX 307, FORT LAUDERDALE, FL 33302-0307
PO BOX 308, FORT LAUDERDALE, FL 33302-0308
PO BOX 309, FORT LAUDERDALE, FL 33302-0309
PO BOX 310, FORT LAUDERDALE, FL 33302-0310
PO BOX 311, FORT LAUDERDALE, FL 33302-0311
PO BOX 312, FORT LAUDERDALE, FL 33302-0312
PO BOX 313, FORT LAUDERDALE, FL 33302-0313
PO BOX 314, FORT LAUDERDALE, FL 33302-0314
PO BOX 315, FORT LAUDERDALE, FL 33302-0315
PO BOX 316, FORT LAUDERDALE, FL 33302-0316
PO BOX 317, FORT LAUDERDALE, FL 33302-0317
PO BOX 318, FORT LAUDERDALE, FL 33302-0318
PO BOX 319, FORT LAUDERDALE, FL 33302-0319
PO BOX 320, FORT LAUDERDALE, FL 33302-0320
PO BOX 321, FORT LAUDERDALE, FL 33302-0321
PO BOX 322, FORT LAUDERDALE, FL 33302-0322
PO BOX 323, FORT LAUDERDALE, FL 33302-0323
PO BOX 324, FORT LAUDERDALE, FL 33302-0324
PO BOX 325, FORT LAUDERDALE, FL 33302-0325
PO BOX 326, FORT LAUDERDALE, FL 33302-0326
PO BOX 327, FORT LAUDERDALE, FL 33302-0327
PO BOX 328, FORT LAUDERDALE, FL 33302-0328
PO BOX 329, FORT LAUDERDALE, FL 33302-0329
PO BOX 330, FORT LAUDERDALE, FL 33302-0330
PO BOX 331, FORT LAUDERDALE, FL 33302-0331
PO BOX 332, FORT LAUDERDALE, FL 33302-0332
PO BOX 333, FORT LAUDERDALE, FL 33302-0333
PO BOX 334, FORT LAUDERDALE, FL 33302-0334
PO BOX 335, FORT LAUDERDALE, FL 33302-0335
PO BOX 336, FORT LAUDERDALE, FL 33302-0336
PO BOX 337, FORT LAUDERDALE, FL 33302-0337
PO BOX 338, FORT LAUDERDALE, FL 33302-0338
PO BOX 339, FORT LAUDERDALE, FL 33302-0339
PO BOX 340, FORT LAUDERDALE, FL 33302-0340
PO BOX 341, FORT LAUDERDALE, FL 33302-0341
PO BOX 342, FORT LAUDERDALE, FL 33302-0342
PO BOX 343, FORT LAUDERDALE, FL 33302-0343
PO BOX 344, FORT LAUDERDALE, FL 33302-0344
PO BOX 345, FORT LAUDERDALE, FL 33302-0345
PO BOX 346, FORT LAUDERDALE, FL 33302-0346
PO BOX 347, FORT LAUDERDALE, FL 33302-0347
PO BOX 348, FORT LAUDERDALE, FL 33302-0348
PO BOX 349, FORT LAUDERDALE, FL 33302-0349
PO BOX 350, FORT LAUDERDALE, FL 33302-0350
PO BOX 351, FORT LAUDERDALE, FL 33302-0351
PO BOX 352, FORT LAUDERDALE, FL 33302-0352
PO BOX 353, FORT LAUDERDALE, FL 33302-0353
PO BOX 354, FORT LAUDERDALE, FL 33302-0354
PO BOX 355, FORT LAUDERDALE, FL 33302-0355
PO BOX 356, FORT LAUDERDALE, FL 33302-0356
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