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 301, DAVENPORT, IA 52805-0301
PO BOX 302, DAVENPORT, IA 52805-0302
PO BOX 303, DAVENPORT, IA 52805-0303
PO BOX 304, DAVENPORT, IA 52805-0304
PO BOX 305, DAVENPORT, IA 52805-0305
PO BOX 306, DAVENPORT, IA 52805-0306
PO BOX 307, DAVENPORT, IA 52805-0307
PO BOX 308, DAVENPORT, IA 52805-0308
PO BOX 309, DAVENPORT, IA 52805-0309
PO BOX 310, DAVENPORT, IA 52805-0310
PO BOX 311, DAVENPORT, IA 52805-0311
PO BOX 312, DAVENPORT, IA 52805-0312
PO BOX 313, DAVENPORT, IA 52805-0313
PO BOX 314, DAVENPORT, IA 52805-0314
PO BOX 315, DAVENPORT, IA 52805-0315
PO BOX 316, DAVENPORT, IA 52805-0316
PO BOX 317, DAVENPORT, IA 52805-0317
PO BOX 318, DAVENPORT, IA 52805-0318
PO BOX 319, DAVENPORT, IA 52805-0319
PO BOX 320, DAVENPORT, IA 52805-0320
PO BOX 321, DAVENPORT, IA 52805-0321
PO BOX 322, DAVENPORT, IA 52805-0322
PO BOX 323, DAVENPORT, IA 52805-0323
PO BOX 324, DAVENPORT, IA 52805-0324
PO BOX 325, DAVENPORT, IA 52805-0325
PO BOX 326, DAVENPORT, IA 52805-0326
PO BOX 327, DAVENPORT, IA 52805-0327
PO BOX 328, DAVENPORT, IA 52805-0328
PO BOX 329, DAVENPORT, IA 52805-0329
PO BOX 330, DAVENPORT, IA 52805-0330
PO BOX 331, DAVENPORT, IA 52805-0331
PO BOX 332, DAVENPORT, IA 52805-0332
PO BOX 333, DAVENPORT, IA 52805-0333
PO BOX 334, DAVENPORT, IA 52805-0334
PO BOX 335, DAVENPORT, IA 52805-0335
PO BOX 336, DAVENPORT, IA 52805-0336
PO BOX 337, DAVENPORT, IA 52805-0337
PO BOX 338, DAVENPORT, IA 52805-0338
PO BOX 339, DAVENPORT, IA 52805-0339
PO BOX 340, DAVENPORT, IA 52805-0340
PO BOX 341, DAVENPORT, IA 52805-0341
PO BOX 342, DAVENPORT, IA 52805-0342
PO BOX 343, DAVENPORT, IA 52805-0343
PO BOX 344, DAVENPORT, IA 52805-0344
PO BOX 345, DAVENPORT, IA 52805-0345
PO BOX 346, DAVENPORT, IA 52805-0346
PO BOX 347, DAVENPORT, IA 52805-0347
PO BOX 348, DAVENPORT, IA 52805-0348
PO BOX 349, DAVENPORT, IA 52805-0349
PO BOX 350, DAVENPORT, IA 52805-0350
PO BOX 351, DAVENPORT, IA 52805-0351
PO BOX 352, DAVENPORT, IA 52805-0352
PO BOX 353, DAVENPORT, IA 52805-0353
PO BOX 354, DAVENPORT, IA 52805-0354
PO BOX 355, DAVENPORT, IA 52805-0355
PO BOX 356, DAVENPORT, IA 52805-0356
PO BOX 357, DAVENPORT, IA 52805-0357
PO BOX 358, DAVENPORT, IA 52805-0358
PO BOX 359, DAVENPORT, IA 52805-0359
PO BOX 360, DAVENPORT, IA 52805-0360
PO BOX 361, DAVENPORT, IA 52805-0361
PO BOX 362, DAVENPORT, IA 52805-0362
PO BOX 363, DAVENPORT, IA 52805-0363
PO BOX 364, DAVENPORT, IA 52805-0364
PO BOX 365, DAVENPORT, IA 52805-0365
PO BOX 366, DAVENPORT, IA 52805-0366
PO BOX 367, DAVENPORT, IA 52805-0367
PO BOX 368, DAVENPORT, IA 52805-0368
PO BOX 369, DAVENPORT, IA 52805-0369
PO BOX 370, DAVENPORT, IA 52805-0370
PO BOX 371, DAVENPORT, IA 52805-0371
PO BOX 372, DAVENPORT, IA 52805-0372
PO BOX 373, DAVENPORT, IA 52805-0373
PO BOX 374, DAVENPORT, IA 52805-0374
PO BOX 375, DAVENPORT, IA 52805-0375
PO BOX 376, DAVENPORT, IA 52805-0376
PO BOX 377, DAVENPORT, IA 52805-0377
PO BOX 378, DAVENPORT, IA 52805-0378
PO BOX 379, DAVENPORT, IA 52805-0379
PO BOX 380, DAVENPORT, IA 52805-0380
PO BOX 381, DAVENPORT, IA 52805-0381
PO BOX 382, DAVENPORT, IA 52805-0382
PO BOX 383, DAVENPORT, IA 52805-0383
PO BOX 384, DAVENPORT, IA 52805-0384
PO BOX 385, DAVENPORT, IA 52805-0385
PO BOX 386, DAVENPORT, IA 52805-0386
PO BOX 387, DAVENPORT, IA 52805-0387
PO BOX 388, DAVENPORT, IA 52805-0388
PO BOX 389, DAVENPORT, IA 52805-0389
PO BOX 390, DAVENPORT, IA 52805-0390
PO BOX 391, DAVENPORT, IA 52805-0391
PO BOX 392, DAVENPORT, IA 52805-0392
PO BOX 393, DAVENPORT, IA 52805-0393
PO BOX 394, DAVENPORT, IA 52805-0394
PO BOX 395, DAVENPORT, IA 52805-0395
PO BOX 396, DAVENPORT, IA 52805-0396
PO BOX 397, DAVENPORT, IA 52805-0397
PO BOX 398, DAVENPORT, IA 52805-0398
PO BOX 399, DAVENPORT, IA 52805-0399
PO BOX 400, DAVENPORT, IA 52805-0400
PO BOX 401, DAVENPORT, IA 52805-0401
PO BOX 402, DAVENPORT, IA 52805-0402
PO BOX 403, DAVENPORT, IA 52805-0403
PO BOX 404, DAVENPORT, IA 52805-0404
PO BOX 405, DAVENPORT, IA 52805-0405
PO BOX 406, DAVENPORT, IA 52805-0406
PO BOX 407, DAVENPORT, IA 52805-0407
PO BOX 408, DAVENPORT, IA 52805-0408
PO BOX 409, DAVENPORT, IA 52805-0409
PO BOX 410, DAVENPORT, IA 52805-0410
PO BOX 411, DAVENPORT, IA 52805-0411
PO BOX 412, DAVENPORT, IA 52805-0412
PO BOX 413, DAVENPORT, IA 52805-0413
PO BOX 414, DAVENPORT, IA 52805-0414
PO BOX 415, DAVENPORT, IA 52805-0415
PO BOX 416, DAVENPORT, IA 52805-0416
PO BOX 417, DAVENPORT, IA 52805-0417
PO BOX 418, DAVENPORT, IA 52805-0418
PO BOX 419, DAVENPORT, IA 52805-0419
PO BOX 420, DAVENPORT, IA 52805-0420
PO BOX 421, DAVENPORT, IA 52805-0421
PO BOX 422, DAVENPORT, IA 52805-0422
PO BOX 423, DAVENPORT, IA 52805-0423
PO BOX 424, DAVENPORT, IA 52805-0424
PO BOX 425, DAVENPORT, IA 52805-0425
PO BOX 426, DAVENPORT, IA 52805-0426
PO BOX 427, DAVENPORT, IA 52805-0427
PO BOX 428, DAVENPORT, IA 52805-0428
PO BOX 429, DAVENPORT, IA 52805-0429
PO BOX 430, DAVENPORT, IA 52805-0430
PO BOX 431, DAVENPORT, IA 52805-0431
PO BOX 432, DAVENPORT, IA 52805-0432
PO BOX 433, DAVENPORT, IA 52805-0433
PO BOX 434, DAVENPORT, IA 52805-0434
PO BOX 435, DAVENPORT, IA 52805-0435
PO BOX 436, DAVENPORT, IA 52805-0436
PO BOX 437, DAVENPORT, IA 52805-0437
PO BOX 438, DAVENPORT, IA 52805-0438
PO BOX 439, DAVENPORT, IA 52805-0439
PO BOX 440, DAVENPORT, IA 52805-0440
PO BOX 441, DAVENPORT, IA 52805-0441
PO BOX 442, DAVENPORT, IA 52805-0442
PO BOX 443, DAVENPORT, IA 52805-0443
PO BOX 444, DAVENPORT, IA 52805-0444
PO BOX 445, DAVENPORT, IA 52805-0445
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