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 291, STARKVILLE, MS 39760-0291
PO BOX 292, STARKVILLE, MS 39760-0292
PO BOX 293, STARKVILLE, MS 39760-0293
PO BOX 294, STARKVILLE, MS 39760-0294
PO BOX 295, STARKVILLE, MS 39760-0295
PO BOX 296, STARKVILLE, MS 39760-0296
PO BOX 297, STARKVILLE, MS 39760-0297
PO BOX 298, STARKVILLE, MS 39760-0298
PO BOX 299, STARKVILLE, MS 39760-0299
PO BOX 300, STARKVILLE, MS 39760-0300
PO BOX 301, STARKVILLE, MS 39760-0301
PO BOX 302, STARKVILLE, MS 39760-0302
PO BOX 303, STARKVILLE, MS 39760-0303
PO BOX 304, STARKVILLE, MS 39760-0304
PO BOX 305, STARKVILLE, MS 39760-0305
PO BOX 306, STARKVILLE, MS 39760-0306
PO BOX 307, STARKVILLE, MS 39760-0307
PO BOX 308, STARKVILLE, MS 39760-0308
PO BOX 309, STARKVILLE, MS 39760-0309
PO BOX 310, STARKVILLE, MS 39760-0310
PO BOX 311, STARKVILLE, MS 39760-0311
PO BOX 312, STARKVILLE, MS 39760-0312
PO BOX 313, STARKVILLE, MS 39760-0313
PO BOX 314, STARKVILLE, MS 39760-0314
PO BOX 315, STARKVILLE, MS 39760-0315
PO BOX 316, STARKVILLE, MS 39760-0316
PO BOX 317, STARKVILLE, MS 39760-0317
PO BOX 318, STARKVILLE, MS 39760-0318
PO BOX 319, STARKVILLE, MS 39760-0319
PO BOX 320, STARKVILLE, MS 39760-0320
PO BOX 321, STARKVILLE, MS 39760-0321
PO BOX 322, STARKVILLE, MS 39760-0322
PO BOX 323, STARKVILLE, MS 39760-0323
PO BOX 324, STARKVILLE, MS 39760-0324
PO BOX 325, STARKVILLE, MS 39760-0325
PO BOX 326, STARKVILLE, MS 39760-0326
PO BOX 327, STARKVILLE, MS 39760-0327
PO BOX 328, STARKVILLE, MS 39760-0328
PO BOX 329, STARKVILLE, MS 39760-0329
PO BOX 330, STARKVILLE, MS 39760-0330
PO BOX 331, STARKVILLE, MS 39760-0331
PO BOX 332, STARKVILLE, MS 39760-0332
PO BOX 333, STARKVILLE, MS 39760-0333
PO BOX 334, STARKVILLE, MS 39760-0334
PO BOX 335, STARKVILLE, MS 39760-0335
PO BOX 336, STARKVILLE, MS 39760-0336
PO BOX 337, STARKVILLE, MS 39760-0337
PO BOX 338, STARKVILLE, MS 39760-0338
PO BOX 339, STARKVILLE, MS 39760-0339
PO BOX 340, STARKVILLE, MS 39760-0340
PO BOX 341, STARKVILLE, MS 39760-0341
PO BOX 342, STARKVILLE, MS 39760-0342
PO BOX 343, STARKVILLE, MS 39760-0343
PO BOX 344, STARKVILLE, MS 39760-0344
PO BOX 345, STARKVILLE, MS 39760-0345
PO BOX 346, STARKVILLE, MS 39760-0346
PO BOX 347, STARKVILLE, MS 39760-0347
PO BOX 348, STARKVILLE, MS 39760-0348
PO BOX 349, STARKVILLE, MS 39760-0349
PO BOX 350, STARKVILLE, MS 39760-0350
PO BOX 351, STARKVILLE, MS 39760-0351
PO BOX 352, STARKVILLE, MS 39760-0352
PO BOX 353, STARKVILLE, MS 39760-0353
PO BOX 354, STARKVILLE, MS 39760-0354
PO BOX 355, STARKVILLE, MS 39760-0355
PO BOX 356, STARKVILLE, MS 39760-0356
PO BOX 357, STARKVILLE, MS 39760-0357
PO BOX 358, STARKVILLE, MS 39760-0358
PO BOX 359, STARKVILLE, MS 39760-0359
PO BOX 360, STARKVILLE, MS 39760-0360
PO BOX 361, STARKVILLE, MS 39760-0361
PO BOX 362, STARKVILLE, MS 39760-0362
PO BOX 363, STARKVILLE, MS 39760-0363
PO BOX 364, STARKVILLE, MS 39760-0364
PO BOX 365, STARKVILLE, MS 39760-0365
PO BOX 366, STARKVILLE, MS 39760-0366
PO BOX 367, STARKVILLE, MS 39760-0367
PO BOX 368, STARKVILLE, MS 39760-0368
PO BOX 369, STARKVILLE, MS 39760-0369
PO BOX 370, STARKVILLE, MS 39760-0370
PO BOX 371, STARKVILLE, MS 39760-0371
PO BOX 372, STARKVILLE, MS 39760-0372
PO BOX 373, STARKVILLE, MS 39760-0373
PO BOX 374, STARKVILLE, MS 39760-0374
PO BOX 375, STARKVILLE, MS 39760-0375
PO BOX 376, STARKVILLE, MS 39760-0376
PO BOX 377, STARKVILLE, MS 39760-0377
PO BOX 378, STARKVILLE, MS 39760-0378
PO BOX 379, STARKVILLE, MS 39760-0379
PO BOX 380, STARKVILLE, MS 39760-0380
PO BOX 381, STARKVILLE, MS 39760-0381
PO BOX 382, STARKVILLE, MS 39760-0382
PO BOX 383, STARKVILLE, MS 39760-0383
PO BOX 384, STARKVILLE, MS 39760-0384
PO BOX 385, STARKVILLE, MS 39760-0385
PO BOX 386, STARKVILLE, MS 39760-0386
PO BOX 387, STARKVILLE, MS 39760-0387
PO BOX 388, STARKVILLE, MS 39760-0388
PO BOX 389, STARKVILLE, MS 39760-0389
PO BOX 390, STARKVILLE, MS 39760-0390
PO BOX 391, STARKVILLE, MS 39760-0391
PO BOX 392, STARKVILLE, MS 39760-0392
PO BOX 393, STARKVILLE, MS 39760-0393
PO BOX 394, STARKVILLE, MS 39760-0394
PO BOX 395, STARKVILLE, MS 39760-0395
PO BOX 396, STARKVILLE, MS 39760-0396
PO BOX 397, STARKVILLE, MS 39760-0397
PO BOX 398, STARKVILLE, MS 39760-0398
PO BOX 399, STARKVILLE, MS 39760-0399
PO BOX 400, STARKVILLE, MS 39760-0400
PO BOX 401, STARKVILLE, MS 39760-0401
PO BOX 402, STARKVILLE, MS 39760-0402
PO BOX 403, STARKVILLE, MS 39760-0403
PO BOX 404, STARKVILLE, MS 39760-0404
PO BOX 405, STARKVILLE, MS 39760-0405
PO BOX 406, STARKVILLE, MS 39760-0406
PO BOX 407, STARKVILLE, MS 39760-0407
PO BOX 408, STARKVILLE, MS 39760-0408
PO BOX 409, STARKVILLE, MS 39760-0409
PO BOX 410, STARKVILLE, MS 39760-0410
PO BOX 411, STARKVILLE, MS 39760-0411
PO BOX 412, STARKVILLE, MS 39760-0412
PO BOX 413, STARKVILLE, MS 39760-0413
PO BOX 414, STARKVILLE, MS 39760-0414
PO BOX 415, STARKVILLE, MS 39760-0415
PO BOX 416, STARKVILLE, MS 39760-0416
PO BOX 417, STARKVILLE, MS 39760-0417
PO BOX 418, STARKVILLE, MS 39760-0418
PO BOX 419, STARKVILLE, MS 39760-0419
PO BOX 420, STARKVILLE, MS 39760-0420
PO BOX 421, STARKVILLE, MS 39760-0421
PO BOX 422, STARKVILLE, MS 39760-0422
PO BOX 423, STARKVILLE, MS 39760-0423
PO BOX 424, STARKVILLE, MS 39760-0424
PO BOX 425, STARKVILLE, MS 39760-0425
PO BOX 426, STARKVILLE, MS 39760-0426
PO BOX 427, STARKVILLE, MS 39760-0427
PO BOX 428, STARKVILLE, MS 39760-0428
PO BOX 429, STARKVILLE, MS 39760-0429
PO BOX 430, STARKVILLE, MS 39760-0430
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