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, DEERFIELD BEACH, FL 33443-0241
PO BOX 242, DEERFIELD BEACH, FL 33443-0242
PO BOX 243, DEERFIELD BEACH, FL 33443-0243
PO BOX 244, DEERFIELD BEACH, FL 33443-0244
PO BOX 245, DEERFIELD BEACH, FL 33443-0245
PO BOX 246, DEERFIELD BEACH, FL 33443-0246
PO BOX 247, DEERFIELD BEACH, FL 33443-0247
PO BOX 248, DEERFIELD BEACH, FL 33443-0248
PO BOX 249, DEERFIELD BEACH, FL 33443-0249
PO BOX 250, DEERFIELD BEACH, FL 33443-0250
PO BOX 251, DEERFIELD BEACH, FL 33443-0251
PO BOX 252, DEERFIELD BEACH, FL 33443-0252
PO BOX 253, DEERFIELD BEACH, FL 33443-0253
PO BOX 254, DEERFIELD BEACH, FL 33443-0254
PO BOX 255, DEERFIELD BEACH, FL 33443-0255
PO BOX 256, DEERFIELD BEACH, FL 33443-0256
PO BOX 257, DEERFIELD BEACH, FL 33443-0257
PO BOX 258, DEERFIELD BEACH, FL 33443-0258
PO BOX 259, DEERFIELD BEACH, FL 33443-0259
PO BOX 260, DEERFIELD BEACH, FL 33443-0260
PO BOX 261, DEERFIELD BEACH, FL 33443-0261
PO BOX 262, DEERFIELD BEACH, FL 33443-0262
PO BOX 263, DEERFIELD BEACH, FL 33443-0263
PO BOX 264, DEERFIELD BEACH, FL 33443-0264
PO BOX 265, DEERFIELD BEACH, FL 33443-0265
PO BOX 266, DEERFIELD BEACH, FL 33443-0266
PO BOX 267, DEERFIELD BEACH, FL 33443-0267
PO BOX 268, DEERFIELD BEACH, FL 33443-0268
PO BOX 269, DEERFIELD BEACH, FL 33443-0269
PO BOX 270, DEERFIELD BEACH, FL 33443-0270
PO BOX 271, DEERFIELD BEACH, FL 33443-0271
PO BOX 272, DEERFIELD BEACH, FL 33443-0272
PO BOX 273, DEERFIELD BEACH, FL 33443-0273
PO BOX 274, DEERFIELD BEACH, FL 33443-0274
PO BOX 275, DEERFIELD BEACH, FL 33443-0275
PO BOX 276, DEERFIELD BEACH, FL 33443-0276
PO BOX 277, DEERFIELD BEACH, FL 33443-0277
PO BOX 278, DEERFIELD BEACH, FL 33443-0278
PO BOX 279, DEERFIELD BEACH, FL 33443-0279
PO BOX 280, DEERFIELD BEACH, FL 33443-0280
PO BOX 281, DEERFIELD BEACH, FL 33443-0281
PO BOX 282, DEERFIELD BEACH, FL 33443-0282
PO BOX 283, DEERFIELD BEACH, FL 33443-0283
PO BOX 284, DEERFIELD BEACH, FL 33443-0284
PO BOX 285, DEERFIELD BEACH, FL 33443-0285
PO BOX 286, DEERFIELD BEACH, FL 33443-0286
PO BOX 287, DEERFIELD BEACH, FL 33443-0287
PO BOX 288, DEERFIELD BEACH, FL 33443-0288
PO BOX 289, DEERFIELD BEACH, FL 33443-0289
PO BOX 290, DEERFIELD BEACH, FL 33443-0290
PO BOX 291, DEERFIELD BEACH, FL 33443-0291
PO BOX 292, DEERFIELD BEACH, FL 33443-0292
PO BOX 293, DEERFIELD BEACH, FL 33443-0293
PO BOX 294, DEERFIELD BEACH, FL 33443-0294
PO BOX 295, DEERFIELD BEACH, FL 33443-0295
PO BOX 296, DEERFIELD BEACH, FL 33443-0296
PO BOX 297, DEERFIELD BEACH, FL 33443-0297
PO BOX 298, DEERFIELD BEACH, FL 33443-0298
PO BOX 299, DEERFIELD BEACH, FL 33443-0299
PO BOX 300, DEERFIELD BEACH, FL 33443-0300
PO BOX 301, DEERFIELD BEACH, FL 33443-0301
PO BOX 302, DEERFIELD BEACH, FL 33443-0302
PO BOX 303, DEERFIELD BEACH, FL 33443-0303
PO BOX 304, DEERFIELD BEACH, FL 33443-0304
PO BOX 305, DEERFIELD BEACH, FL 33443-0305
PO BOX 306, DEERFIELD BEACH, FL 33443-0306
PO BOX 307, DEERFIELD BEACH, FL 33443-0307
PO BOX 308, DEERFIELD BEACH, FL 33443-0308
PO BOX 309, DEERFIELD BEACH, FL 33443-0309
PO BOX 310, DEERFIELD BEACH, FL 33443-0310
PO BOX 311, DEERFIELD BEACH, FL 33443-0311
PO BOX 312, DEERFIELD BEACH, FL 33443-0312
PO BOX 313, DEERFIELD BEACH, FL 33443-0313
PO BOX 314, DEERFIELD BEACH, FL 33443-0314
PO BOX 315, DEERFIELD BEACH, FL 33443-0315
PO BOX 316, DEERFIELD BEACH, FL 33443-0316
PO BOX 317, DEERFIELD BEACH, FL 33443-0317
PO BOX 318, DEERFIELD BEACH, FL 33443-0318
PO BOX 319, DEERFIELD BEACH, FL 33443-0319
PO BOX 320, DEERFIELD BEACH, FL 33443-0320
PO BOX 321, DEERFIELD BEACH, FL 33443-0321
PO BOX 322, DEERFIELD BEACH, FL 33443-0322
PO BOX 323, DEERFIELD BEACH, FL 33443-0323
PO BOX 324, DEERFIELD BEACH, FL 33443-0324
PO BOX 325, DEERFIELD BEACH, FL 33443-0325
PO BOX 326, DEERFIELD BEACH, FL 33443-0326
PO BOX 327, DEERFIELD BEACH, FL 33443-0327
PO BOX 328, DEERFIELD BEACH, FL 33443-0328
PO BOX 329, DEERFIELD BEACH, FL 33443-0329
PO BOX 330, DEERFIELD BEACH, FL 33443-0330
PO BOX 331, DEERFIELD BEACH, FL 33443-0331
PO BOX 332, DEERFIELD BEACH, FL 33443-0332
PO BOX 333, DEERFIELD BEACH, FL 33443-0333
PO BOX 334, DEERFIELD BEACH, FL 33443-0334
PO BOX 335, DEERFIELD BEACH, FL 33443-0335
PO BOX 336, DEERFIELD BEACH, FL 33443-0336
PO BOX 337, DEERFIELD BEACH, FL 33443-0337
PO BOX 338, DEERFIELD BEACH, FL 33443-0338
PO BOX 339, DEERFIELD BEACH, FL 33443-0339
PO BOX 340, DEERFIELD BEACH, FL 33443-0340
PO BOX 341, DEERFIELD BEACH, FL 33443-0341
PO BOX 342, DEERFIELD BEACH, FL 33443-0342
PO BOX 343, DEERFIELD BEACH, FL 33443-0343
PO BOX 344, DEERFIELD BEACH, FL 33443-0344
PO BOX 345, DEERFIELD BEACH, FL 33443-0345
PO BOX 346, DEERFIELD BEACH, FL 33443-0346
PO BOX 347, DEERFIELD BEACH, FL 33443-0347
PO BOX 348, DEERFIELD BEACH, FL 33443-0348
PO BOX 349, DEERFIELD BEACH, FL 33443-0349
PO BOX 350, DEERFIELD BEACH, FL 33443-0350
PO BOX 351, DEERFIELD BEACH, FL 33443-0351
PO BOX 352, DEERFIELD BEACH, FL 33443-0352
PO BOX 353, DEERFIELD BEACH, FL 33443-0353
PO BOX 354, DEERFIELD BEACH, FL 33443-0354
PO BOX 355, DEERFIELD BEACH, FL 33443-0355
PO BOX 356, DEERFIELD BEACH, FL 33443-0356
PO BOX 357, DEERFIELD BEACH, FL 33443-0357
PO BOX 358, DEERFIELD BEACH, FL 33443-0358
PO BOX 359, DEERFIELD BEACH, FL 33443-0359
PO BOX 360, DEERFIELD BEACH, FL 33443-0360
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