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 451, DAVENPORT, IA 52805-0451
PO BOX 452, DAVENPORT, IA 52805-0452
PO BOX 453, DAVENPORT, IA 52805-0453
PO BOX 454, DAVENPORT, IA 52805-0454
PO BOX 455, DAVENPORT, IA 52805-0455
PO BOX 456, DAVENPORT, IA 52805-0456
PO BOX 457, DAVENPORT, IA 52805-0457
PO BOX 458, DAVENPORT, IA 52805-0458
PO BOX 459, DAVENPORT, IA 52805-0459
PO BOX 460, DAVENPORT, IA 52805-0460
PO BOX 461, DAVENPORT, IA 52805-0461
PO BOX 462, DAVENPORT, IA 52805-0462
PO BOX 463, DAVENPORT, IA 52805-0463
PO BOX 464, DAVENPORT, IA 52805-0464
PO BOX 465, DAVENPORT, IA 52805-0465
PO BOX 466, DAVENPORT, IA 52805-0466
PO BOX 467, DAVENPORT, IA 52805-0467
PO BOX 468, DAVENPORT, IA 52805-0468
PO BOX 469, DAVENPORT, IA 52805-0469
PO BOX 470, DAVENPORT, IA 52805-0470
PO BOX 471, DAVENPORT, IA 52805-0471
PO BOX 472, DAVENPORT, IA 52805-0472
PO BOX 473, DAVENPORT, IA 52805-0473
PO BOX 474, DAVENPORT, IA 52805-0474
PO BOX 475, DAVENPORT, IA 52805-0475
PO BOX 476, DAVENPORT, IA 52805-0476
PO BOX 477, DAVENPORT, IA 52805-0477
PO BOX 478, DAVENPORT, IA 52805-0478
PO BOX 479, DAVENPORT, IA 52805-0479
PO BOX 480, DAVENPORT, IA 52805-0480
PO BOX 481, DAVENPORT, IA 52805-0481
PO BOX 482, DAVENPORT, IA 52805-0482
PO BOX 483, DAVENPORT, IA 52805-0483
PO BOX 484, DAVENPORT, IA 52805-0484
PO BOX 485, DAVENPORT, IA 52805-0485
PO BOX 486, DAVENPORT, IA 52805-0486
PO BOX 487, DAVENPORT, IA 52805-0487
PO BOX 488, DAVENPORT, IA 52805-0488
PO BOX 489, DAVENPORT, IA 52805-0489
PO BOX 490, DAVENPORT, IA 52805-0490
PO BOX 491, DAVENPORT, IA 52805-0491
PO BOX 492, DAVENPORT, IA 52805-0492
PO BOX 493, DAVENPORT, IA 52805-0493
PO BOX 494, DAVENPORT, IA 52805-0494
PO BOX 495, DAVENPORT, IA 52805-0495
PO BOX 496, DAVENPORT, IA 52805-0496
PO BOX 497, DAVENPORT, IA 52805-0497
PO BOX 498, DAVENPORT, IA 52805-0498
PO BOX 499, DAVENPORT, IA 52805-0499
PO BOX 500, DAVENPORT, IA 52805-0500
PO BOX 501, DAVENPORT, IA 52805-0501
PO BOX 502, DAVENPORT, IA 52805-0502
PO BOX 503, DAVENPORT, IA 52805-0503
PO BOX 504, DAVENPORT, IA 52805-0504
PO BOX 505, DAVENPORT, IA 52805-0505
PO BOX 506, DAVENPORT, IA 52805-0506
PO BOX 507, DAVENPORT, IA 52805-0507
PO BOX 508, DAVENPORT, IA 52805-0508
PO BOX 509, DAVENPORT, IA 52805-0509
PO BOX 510, DAVENPORT, IA 52805-0510
PO BOX 511, DAVENPORT, IA 52805-0511
PO BOX 512, DAVENPORT, IA 52805-0512
PO BOX 513, DAVENPORT, IA 52805-0513
PO BOX 514, DAVENPORT, IA 52805-0514
PO BOX 515, DAVENPORT, IA 52805-0515
PO BOX 516, DAVENPORT, IA 52805-0516
PO BOX 517, DAVENPORT, IA 52805-0517
PO BOX 518, DAVENPORT, IA 52805-0518
PO BOX 519, DAVENPORT, IA 52805-0519
PO BOX 520, DAVENPORT, IA 52805-0520
PO BOX 521, DAVENPORT, IA 52805-0521
PO BOX 522, DAVENPORT, IA 52805-0522
PO BOX 523, DAVENPORT, IA 52805-0523
PO BOX 524, DAVENPORT, IA 52805-0524
PO BOX 525, DAVENPORT, IA 52805-0525
PO BOX 526, DAVENPORT, IA 52805-0526
PO BOX 527, DAVENPORT, IA 52805-0527
PO BOX 528, DAVENPORT, IA 52805-0528
PO BOX 529, DAVENPORT, IA 52805-0529
PO BOX 530, DAVENPORT, IA 52805-0530
PO BOX 531, DAVENPORT, IA 52805-0531
PO BOX 532, DAVENPORT, IA 52805-0532
PO BOX 533, DAVENPORT, IA 52805-0533
PO BOX 534, DAVENPORT, IA 52805-0534
PO BOX 535, DAVENPORT, IA 52805-0535
PO BOX 536, DAVENPORT, IA 52805-0536
PO BOX 537, DAVENPORT, IA 52805-0537
PO BOX 538, DAVENPORT, IA 52805-0538
PO BOX 539, DAVENPORT, IA 52805-0539
PO BOX 540, DAVENPORT, IA 52805-0540
PO BOX 541, DAVENPORT, IA 52805-0541
PO BOX 542, DAVENPORT, IA 52805-0542
PO BOX 543, DAVENPORT, IA 52805-0543
PO BOX 544, DAVENPORT, IA 52805-0544
PO BOX 545, DAVENPORT, IA 52805-0545
PO BOX 546, DAVENPORT, IA 52805-0546
PO BOX 547, DAVENPORT, IA 52805-0547
PO BOX 548, DAVENPORT, IA 52805-0548
PO BOX 549, DAVENPORT, IA 52805-0549
PO BOX 550, DAVENPORT, IA 52805-0550
PO BOX 551, DAVENPORT, IA 52805-0551
PO BOX 552, DAVENPORT, IA 52805-0552
PO BOX 553, DAVENPORT, IA 52805-0553
PO BOX 554, DAVENPORT, IA 52805-0554
PO BOX 555, DAVENPORT, IA 52805-0555
PO BOX 556, DAVENPORT, IA 52805-0556
PO BOX 557, DAVENPORT, IA 52805-0557
PO BOX 558, DAVENPORT, IA 52805-0558
PO BOX 559, DAVENPORT, IA 52805-0559
PO BOX 560, DAVENPORT, IA 52805-0560
PO BOX 561, DAVENPORT, IA 52805-0561
PO BOX 562, DAVENPORT, IA 52805-0562
PO BOX 563, DAVENPORT, IA 52805-0563
PO BOX 564, DAVENPORT, IA 52805-0564
PO BOX 565, DAVENPORT, IA 52805-0565
PO BOX 566, DAVENPORT, IA 52805-0566
PO BOX 567, DAVENPORT, IA 52805-0567
PO BOX 568, DAVENPORT, IA 52805-0568
PO BOX 569, DAVENPORT, IA 52805-0569
PO BOX 570, DAVENPORT, IA 52805-0570
PO BOX 571, DAVENPORT, IA 52805-0571
PO BOX 572, DAVENPORT, IA 52805-0572
PO BOX 573, DAVENPORT, IA 52805-0573
PO BOX 574, DAVENPORT, IA 52805-0574
PO BOX 575, DAVENPORT, IA 52805-0575
PO BOX 576, DAVENPORT, IA 52805-0576
PO BOX 577, DAVENPORT, IA 52805-0577
PO BOX 578, DAVENPORT, IA 52805-0578
PO BOX 579, DAVENPORT, IA 52805-0579
PO BOX 580, DAVENPORT, IA 52805-0580
PO BOX 581, DAVENPORT, IA 52805-0581
PO BOX 582, DAVENPORT, IA 52805-0582
PO BOX 583, DAVENPORT, IA 52805-0583
PO BOX 584, DAVENPORT, IA 52805-0584
PO BOX 585, DAVENPORT, IA 52805-0585
PO BOX 586, DAVENPORT, IA 52805-0586
PO BOX 587, DAVENPORT, IA 52805-0587
PO BOX 588, DAVENPORT, IA 52805-0588
PO BOX 589, DAVENPORT, IA 52805-0589
PO BOX 590, DAVENPORT, IA 52805-0590
PO BOX 591, DAVENPORT, IA 52805-0591
PO BOX 592, DAVENPORT, IA 52805-0592
PO BOX 593, DAVENPORT, IA 52805-0593
PO BOX 594, DAVENPORT, IA 52805-0594
PO BOX 595, DAVENPORT, IA 52805-0595
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