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, NORTH SPRINGFIELD, VT 05150-0451
PO BOX 452, NORTH SPRINGFIELD, VT 05150-0452
PO BOX 453, NORTH SPRINGFIELD, VT 05150-0453
PO BOX 454, NORTH SPRINGFIELD, VT 05150-0454
PO BOX 455, NORTH SPRINGFIELD, VT 05150-0455
PO BOX 456, NORTH SPRINGFIELD, VT 05150-0456
PO BOX 457, NORTH SPRINGFIELD, VT 05150-0457
PO BOX 458, NORTH SPRINGFIELD, VT 05150-0458
PO BOX 459, NORTH SPRINGFIELD, VT 05150-0459
PO BOX 460, NORTH SPRINGFIELD, VT 05150-0460
PO BOX 461, NORTH SPRINGFIELD, VT 05150-0461
PO BOX 462, NORTH SPRINGFIELD, VT 05150-0462
PO BOX 463, NORTH SPRINGFIELD, VT 05150-0463
PO BOX 464, NORTH SPRINGFIELD, VT 05150-0464
PO BOX 465, NORTH SPRINGFIELD, VT 05150-0465
PO BOX 466, NORTH SPRINGFIELD, VT 05150-0466
PO BOX 467, NORTH SPRINGFIELD, VT 05150-0467
PO BOX 468, NORTH SPRINGFIELD, VT 05150-0468
PO BOX 469, NORTH SPRINGFIELD, VT 05150-0469
PO BOX 470, NORTH SPRINGFIELD, VT 05150-0470
PO BOX 471, NORTH SPRINGFIELD, VT 05150-0471
PO BOX 472, NORTH SPRINGFIELD, VT 05150-0472
PO BOX 473, NORTH SPRINGFIELD, VT 05150-0473
PO BOX 474, NORTH SPRINGFIELD, VT 05150-0474
PO BOX 475, NORTH SPRINGFIELD, VT 05150-0475
PO BOX 476, NORTH SPRINGFIELD, VT 05150-0476
PO BOX 477, NORTH SPRINGFIELD, VT 05150-0477
PO BOX 478, NORTH SPRINGFIELD, VT 05150-0478
PO BOX 479, NORTH SPRINGFIELD, VT 05150-0479
PO BOX 480, NORTH SPRINGFIELD, VT 05150-0480
PO BOX 481, NORTH SPRINGFIELD, VT 05150-0481
PO BOX 482, NORTH SPRINGFIELD, VT 05150-0482
PO BOX 483, NORTH SPRINGFIELD, VT 05150-0483
PO BOX 484, NORTH SPRINGFIELD, VT 05150-0484
PO BOX 485, NORTH SPRINGFIELD, VT 05150-0485
PO BOX 486, NORTH SPRINGFIELD, VT 05150-0486
PO BOX 487, NORTH SPRINGFIELD, VT 05150-0487
PO BOX 488, NORTH SPRINGFIELD, VT 05150-0488
PO BOX 489, NORTH SPRINGFIELD, VT 05150-0489
PO BOX 490, NORTH SPRINGFIELD, VT 05150-0490
PO BOX 491, NORTH SPRINGFIELD, VT 05150-0491
PO BOX 492, NORTH SPRINGFIELD, VT 05150-0492
PO BOX 493, NORTH SPRINGFIELD, VT 05150-0493
PO BOX 494, NORTH SPRINGFIELD, VT 05150-0494
PO BOX 495, NORTH SPRINGFIELD, VT 05150-0495
PO BOX 496, NORTH SPRINGFIELD, VT 05150-0496
PO BOX 497, NORTH SPRINGFIELD, VT 05150-0497
PO BOX 498, NORTH SPRINGFIELD, VT 05150-0498
PO BOX 499, NORTH SPRINGFIELD, VT 05150-0499
PO BOX 500, NORTH SPRINGFIELD, VT 05150-0500
PO BOX 501, NORTH SPRINGFIELD, VT 05150-0501
PO BOX 502, NORTH SPRINGFIELD, VT 05150-0502
PO BOX 503, NORTH SPRINGFIELD, VT 05150-0503
PO BOX 504, NORTH SPRINGFIELD, VT 05150-0504
PO BOX 505, NORTH SPRINGFIELD, VT 05150-0505
PO BOX 506, NORTH SPRINGFIELD, VT 05150-0506
PO BOX 507, NORTH SPRINGFIELD, VT 05150-0507
PO BOX 508, NORTH SPRINGFIELD, VT 05150-0508
PO BOX 509, NORTH SPRINGFIELD, VT 05150-0509
PO BOX 510, NORTH SPRINGFIELD, VT 05150-0510
PO BOX 511, NORTH SPRINGFIELD, VT 05150-0511
PO BOX 512, NORTH SPRINGFIELD, VT 05150-0512
PO BOX 513, NORTH SPRINGFIELD, VT 05150-0513
PO BOX 514, NORTH SPRINGFIELD, VT 05150-0514
PO BOX 515, NORTH SPRINGFIELD, VT 05150-0515
PO BOX 516, NORTH SPRINGFIELD, VT 05150-0516
PO BOX 517, NORTH SPRINGFIELD, VT 05150-0517
PO BOX 518, NORTH SPRINGFIELD, VT 05150-0518
PO BOX 519, NORTH SPRINGFIELD, VT 05150-0519
PO BOX 520, NORTH SPRINGFIELD, VT 05150-0520
PO BOX 521, NORTH SPRINGFIELD, VT 05150-0521
PO BOX 522, NORTH SPRINGFIELD, VT 05150-0522
PO BOX 523, NORTH SPRINGFIELD, VT 05150-0523
PO BOX 524, NORTH SPRINGFIELD, VT 05150-0524
PO BOX 525, NORTH SPRINGFIELD, VT 05150-0525
PO BOX 526, NORTH SPRINGFIELD, VT 05150-0526
PO BOX 527, NORTH SPRINGFIELD, VT 05150-0527
PO BOX 528, NORTH SPRINGFIELD, VT 05150-0528
PO BOX 529, NORTH SPRINGFIELD, VT 05150-0529
PO BOX 530, NORTH SPRINGFIELD, VT 05150-0530
PO BOX 531, NORTH SPRINGFIELD, VT 05150-0531
PO BOX 532, NORTH SPRINGFIELD, VT 05150-0532
PO BOX 533, NORTH SPRINGFIELD, VT 05150-0533
PO BOX 534, NORTH SPRINGFIELD, VT 05150-0534
PO BOX 535, NORTH SPRINGFIELD, VT 05150-0535
PO BOX 536, NORTH SPRINGFIELD, VT 05150-0536
PO BOX 537, NORTH SPRINGFIELD, VT 05150-0537
PO BOX 538, NORTH SPRINGFIELD, VT 05150-0538
PO BOX 539, NORTH SPRINGFIELD, VT 05150-0539
PO BOX 540, NORTH SPRINGFIELD, VT 05150-0540
PO BOX 541, NORTH SPRINGFIELD, VT 05150-0541
PO BOX 542, NORTH SPRINGFIELD, VT 05150-0542
PO BOX 543, NORTH SPRINGFIELD, VT 05150-0543
PO BOX 544, NORTH SPRINGFIELD, VT 05150-0544
PO BOX 545, NORTH SPRINGFIELD, VT 05150-0545
PO BOX 546, NORTH SPRINGFIELD, VT 05150-0546
PO BOX 547, NORTH SPRINGFIELD, VT 05150-0547
PO BOX 548, NORTH SPRINGFIELD, VT 05150-0548
PO BOX 549, NORTH SPRINGFIELD, VT 05150-0549
PO BOX 550, NORTH SPRINGFIELD, VT 05150-0550
PO BOX 551, NORTH SPRINGFIELD, VT 05150-0551
PO BOX 552, NORTH SPRINGFIELD, VT 05150-0552
PO BOX 553, NORTH SPRINGFIELD, VT 05150-0553
PO BOX 554, NORTH SPRINGFIELD, VT 05150-0554
PO BOX 555, NORTH SPRINGFIELD, VT 05150-0555
PO BOX 556, NORTH SPRINGFIELD, VT 05150-0556
PO BOX 557, NORTH SPRINGFIELD, VT 05150-0557
PO BOX 558, NORTH SPRINGFIELD, VT 05150-0558
PO BOX 559, NORTH SPRINGFIELD, VT 05150-0559
PO BOX 560, NORTH SPRINGFIELD, VT 05150-0560
PO BOX 561, NORTH SPRINGFIELD, VT 05150-0561
PO BOX 562, NORTH SPRINGFIELD, VT 05150-0562
PO BOX 563, NORTH SPRINGFIELD, VT 05150-0563
PO BOX 564, NORTH SPRINGFIELD, VT 05150-0564
PO BOX 565, NORTH SPRINGFIELD, VT 05150-0565
PO BOX 566, NORTH SPRINGFIELD, VT 05150-0566
PO BOX 567, NORTH SPRINGFIELD, VT 05150-0567
PO BOX 568, NORTH SPRINGFIELD, VT 05150-0568
PO BOX 569, NORTH SPRINGFIELD, VT 05150-0569
PO BOX 570, NORTH SPRINGFIELD, VT 05150-0570
PO BOX 571, NORTH SPRINGFIELD, VT 05150-0571
PO BOX 572, NORTH SPRINGFIELD, VT 05150-0572
PO BOX 573, NORTH SPRINGFIELD, VT 05150-0573
PO BOX 574, NORTH SPRINGFIELD, VT 05150-0574
PO BOX 575, NORTH SPRINGFIELD, VT 05150-0575
PO BOX 576, NORTH SPRINGFIELD, VT 05150-0576
PO BOX 577, NORTH SPRINGFIELD, VT 05150-0577
PO BOX 578, NORTH SPRINGFIELD, VT 05150-0578
PO BOX 579, NORTH SPRINGFIELD, VT 05150-0579
PO BOX 580, NORTH SPRINGFIELD, VT 05150-0580
PO BOX 581, NORTH SPRINGFIELD, VT 05150-0581
PO BOX 582, NORTH SPRINGFIELD, VT 05150-0582
PO BOX 583, NORTH SPRINGFIELD, VT 05150-0583
PO BOX 584, NORTH SPRINGFIELD, VT 05150-0584
PO BOX 585, NORTH SPRINGFIELD, VT 05150-0585
PO BOX 586, NORTH SPRINGFIELD, VT 05150-0586
PO BOX 587, NORTH SPRINGFIELD, VT 05150-0587
PO BOX 588, NORTH SPRINGFIELD, VT 05150-0588
PO BOX 589, NORTH SPRINGFIELD, VT 05150-0589
PO BOX 590, NORTH SPRINGFIELD, VT 05150-0590
PO BOX 591, NORTH SPRINGFIELD, VT 05150-0591
PO BOX 592, NORTH SPRINGFIELD, VT 05150-0592
PO BOX 593, NORTH SPRINGFIELD, VT 05150-0593
PO BOX 594, NORTH SPRINGFIELD, VT 05150-0594
PO BOX 595, NORTH SPRINGFIELD, VT 05150-0595
PO BOX 596, NORTH SPRINGFIELD, VT 05150-0596
PO BOX 597, NORTH SPRINGFIELD, VT 05150-0597
PO BOX 598, NORTH SPRINGFIELD, VT 05150-0598
PO BOX 599, NORTH SPRINGFIELD, VT 05150-0599
PO BOX 600, NORTH SPRINGFIELD, VT 05150-0600
PO BOX 601, NORTH SPRINGFIELD, VT 05150-0601
PO BOX 602, NORTH SPRINGFIELD, VT 05150-0602
PO BOX 603, NORTH SPRINGFIELD, VT 05150-0603
PO BOX 604, NORTH SPRINGFIELD, VT 05150-0604
PO BOX 605, NORTH SPRINGFIELD, VT 05150-0605
PO BOX 606, NORTH SPRINGFIELD, VT 05150-0606
PO BOX 607, NORTH SPRINGFIELD, VT 05150-0607
PO BOX 608, NORTH SPRINGFIELD, VT 05150-0608
PO BOX 609, NORTH SPRINGFIELD, VT 05150-0609
PO BOX 610, NORTH SPRINGFIELD, VT 05150-0610
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