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 461, FORT FAIRFIELD, ME 04742-0461
PO BOX 462, FORT FAIRFIELD, ME 04742-0462
PO BOX 463, FORT FAIRFIELD, ME 04742-0463
PO BOX 464, FORT FAIRFIELD, ME 04742-0464
PO BOX 465, FORT FAIRFIELD, ME 04742-0465
PO BOX 466, FORT FAIRFIELD, ME 04742-0466
PO BOX 467, FORT FAIRFIELD, ME 04742-0467
PO BOX 468, FORT FAIRFIELD, ME 04742-0468
PO BOX 469, FORT FAIRFIELD, ME 04742-0469
PO BOX 470, FORT FAIRFIELD, ME 04742-0470
PO BOX 471, FORT FAIRFIELD, ME 04742-0471
PO BOX 472, FORT FAIRFIELD, ME 04742-0472
PO BOX 473, FORT FAIRFIELD, ME 04742-0473
PO BOX 474, FORT FAIRFIELD, ME 04742-0474
PO BOX 475, FORT FAIRFIELD, ME 04742-0475
PO BOX 476, FORT FAIRFIELD, ME 04742-0476
PO BOX 477, FORT FAIRFIELD, ME 04742-0477
PO BOX 478, FORT FAIRFIELD, ME 04742-0478
PO BOX 479, FORT FAIRFIELD, ME 04742-0479
PO BOX 480, FORT FAIRFIELD, ME 04742-0480
PO BOX 481, FORT FAIRFIELD, ME 04742-0481
PO BOX 482, FORT FAIRFIELD, ME 04742-0482
PO BOX 483, FORT FAIRFIELD, ME 04742-0483
PO BOX 484, FORT FAIRFIELD, ME 04742-0484
PO BOX 485, FORT FAIRFIELD, ME 04742-0485
PO BOX 486, FORT FAIRFIELD, ME 04742-0486
PO BOX 487, FORT FAIRFIELD, ME 04742-0487
PO BOX 488, FORT FAIRFIELD, ME 04742-0488
PO BOX 489, FORT FAIRFIELD, ME 04742-0489
PO BOX 490, FORT FAIRFIELD, ME 04742-0490
PO BOX 491, FORT FAIRFIELD, ME 04742-0491
PO BOX 492, FORT FAIRFIELD, ME 04742-0492
PO BOX 493, FORT FAIRFIELD, ME 04742-0493
PO BOX 494, FORT FAIRFIELD, ME 04742-0494
PO BOX 495, FORT FAIRFIELD, ME 04742-0495
PO BOX 496, FORT FAIRFIELD, ME 04742-0496
PO BOX 497, FORT FAIRFIELD, ME 04742-0497
PO BOX 498, FORT FAIRFIELD, ME 04742-0498
PO BOX 499, FORT FAIRFIELD, ME 04742-0499
PO BOX 500, FORT FAIRFIELD, ME 04742-0500
PO BOX 501, FORT FAIRFIELD, ME 04742-0501
PO BOX 502, FORT FAIRFIELD, ME 04742-0502
PO BOX 503, FORT FAIRFIELD, ME 04742-0503
PO BOX 504, FORT FAIRFIELD, ME 04742-0504
PO BOX 505, FORT FAIRFIELD, ME 04742-0505
PO BOX 506, FORT FAIRFIELD, ME 04742-0506
PO BOX 507, FORT FAIRFIELD, ME 04742-0507
PO BOX 508, FORT FAIRFIELD, ME 04742-0508
PO BOX 509, FORT FAIRFIELD, ME 04742-0509
PO BOX 510, FORT FAIRFIELD, ME 04742-0510
PO BOX 511, FORT FAIRFIELD, ME 04742-0511
PO BOX 512, FORT FAIRFIELD, ME 04742-0512
PO BOX 513, FORT FAIRFIELD, ME 04742-0513
PO BOX 514, FORT FAIRFIELD, ME 04742-0514
PO BOX 515, FORT FAIRFIELD, ME 04742-0515
PO BOX 516, FORT FAIRFIELD, ME 04742-0516
PO BOX 517, FORT FAIRFIELD, ME 04742-0517
PO BOX 518, FORT FAIRFIELD, ME 04742-0518
PO BOX 519, FORT FAIRFIELD, ME 04742-0519
PO BOX 520, FORT FAIRFIELD, ME 04742-0520
PO BOX 521, FORT FAIRFIELD, ME 04742-0521
PO BOX 522, FORT FAIRFIELD, ME 04742-0522
PO BOX 523, FORT FAIRFIELD, ME 04742-0523
PO BOX 524, FORT FAIRFIELD, ME 04742-0524
PO BOX 525, FORT FAIRFIELD, ME 04742-0525
PO BOX 526, FORT FAIRFIELD, ME 04742-0526
PO BOX 527, FORT FAIRFIELD, ME 04742-0527
PO BOX 528, FORT FAIRFIELD, ME 04742-0528
PO BOX 529, FORT FAIRFIELD, ME 04742-0529
PO BOX 530, FORT FAIRFIELD, ME 04742-0530
PO BOX 531, FORT FAIRFIELD, ME 04742-0531
PO BOX 532, FORT FAIRFIELD, ME 04742-0532
PO BOX 533, FORT FAIRFIELD, ME 04742-0533
PO BOX 534, FORT FAIRFIELD, ME 04742-0534
PO BOX 535, FORT FAIRFIELD, ME 04742-0535
PO BOX 536, FORT FAIRFIELD, ME 04742-0536
PO BOX 537, FORT FAIRFIELD, ME 04742-0537
PO BOX 538, FORT FAIRFIELD, ME 04742-0538
PO BOX 539, FORT FAIRFIELD, ME 04742-0539
PO BOX 540, FORT FAIRFIELD, ME 04742-0540
PO BOX 541, FORT FAIRFIELD, ME 04742-0541
PO BOX 542, FORT FAIRFIELD, ME 04742-0542
PO BOX 543, FORT FAIRFIELD, ME 04742-0543
PO BOX 544, FORT FAIRFIELD, ME 04742-0544
PO BOX 545, FORT FAIRFIELD, ME 04742-0545
PO BOX 546, FORT FAIRFIELD, ME 04742-0546
PO BOX 547, FORT FAIRFIELD, ME 04742-0547
PO BOX 548, FORT FAIRFIELD, ME 04742-0548
PO BOX 549, FORT FAIRFIELD, ME 04742-0549
PO BOX 550, FORT FAIRFIELD, ME 04742-0550
PO BOX 551, FORT FAIRFIELD, ME 04742-0551
PO BOX 552, FORT FAIRFIELD, ME 04742-0552
PO BOX 553, FORT FAIRFIELD, ME 04742-0553
PO BOX 554, FORT FAIRFIELD, ME 04742-0554
PO BOX 555, FORT FAIRFIELD, ME 04742-0555
PO BOX 556, FORT FAIRFIELD, ME 04742-0556
PO BOX 557, FORT FAIRFIELD, ME 04742-0557
PO BOX 558, FORT FAIRFIELD, ME 04742-0558
PO BOX 559, FORT FAIRFIELD, ME 04742-0559
PO BOX 560, FORT FAIRFIELD, ME 04742-0560
PO BOX 561, FORT FAIRFIELD, ME 04742-0561
PO BOX 562, FORT FAIRFIELD, ME 04742-0562
PO BOX 563, FORT FAIRFIELD, ME 04742-0563
PO BOX 564, FORT FAIRFIELD, ME 04742-0564
PO BOX 565, FORT FAIRFIELD, ME 04742-0565
PO BOX 566, FORT FAIRFIELD, ME 04742-0566
PO BOX 567, FORT FAIRFIELD, ME 04742-0567
PO BOX 568, FORT FAIRFIELD, ME 04742-0568
PO BOX 569, FORT FAIRFIELD, ME 04742-0569
PO BOX 570, FORT FAIRFIELD, ME 04742-0570
PO BOX 571, FORT FAIRFIELD, ME 04742-0571
PO BOX 572, FORT FAIRFIELD, ME 04742-0572
PO BOX 573, FORT FAIRFIELD, ME 04742-0573
PO BOX 574, FORT FAIRFIELD, ME 04742-0574
PO BOX 575, FORT FAIRFIELD, ME 04742-0575
PO BOX 576, FORT FAIRFIELD, ME 04742-0576
PO BOX 577, FORT FAIRFIELD, ME 04742-0577
PO BOX 578, FORT FAIRFIELD, ME 04742-0578
PO BOX 579, FORT FAIRFIELD, ME 04742-0579
PO BOX 580, FORT FAIRFIELD, ME 04742-0580
PO BOX 581, FORT FAIRFIELD, ME 04742-0581
PO BOX 582, FORT FAIRFIELD, ME 04742-0582
PO BOX 583, FORT FAIRFIELD, ME 04742-0583
PO BOX 584, FORT FAIRFIELD, ME 04742-0584
PO BOX 585, FORT FAIRFIELD, ME 04742-0585
PO BOX 586, FORT FAIRFIELD, ME 04742-0586
PO BOX 587, FORT FAIRFIELD, ME 04742-0587
PO BOX 588, FORT FAIRFIELD, ME 04742-0588
PO BOX 589, FORT FAIRFIELD, ME 04742-0589
PO BOX 590, FORT FAIRFIELD, ME 04742-0590
PO BOX 591, FORT FAIRFIELD, ME 04742-0591
PO BOX 592, FORT FAIRFIELD, ME 04742-0592
PO BOX 593, FORT FAIRFIELD, ME 04742-0593
PO BOX 594, FORT FAIRFIELD, ME 04742-0594
PO BOX 595, FORT FAIRFIELD, ME 04742-0595
PO BOX 596, FORT FAIRFIELD, ME 04742-0596
PO BOX 597, FORT FAIRFIELD, ME 04742-0597
PO BOX 598, FORT FAIRFIELD, ME 04742-0598
PO BOX 599, FORT FAIRFIELD, ME 04742-0599
PO BOX 600, FORT FAIRFIELD, ME 04742-0600
PO BOX 601, FORT FAIRFIELD, ME 04742-0601
PO BOX 602, FORT FAIRFIELD, ME 04742-0602
PO BOX 603, FORT FAIRFIELD, ME 04742-0603
PO BOX 604, FORT FAIRFIELD, ME 04742-0604
PO BOX 605, FORT FAIRFIELD, ME 04742-0605
PO BOX 606, FORT FAIRFIELD, ME 04742-0606
PO BOX 607, FORT FAIRFIELD, ME 04742-0607
PO BOX 608, FORT FAIRFIELD, ME 04742-0608
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