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 481, LIVERMORE, CA 94551-0481
PO BOX 482, LIVERMORE, CA 94551-0482
PO BOX 483, LIVERMORE, CA 94551-0483
PO BOX 484, LIVERMORE, CA 94551-0484
PO BOX 485, LIVERMORE, CA 94551-0485
PO BOX 486, LIVERMORE, CA 94551-0486
PO BOX 487, LIVERMORE, CA 94551-0487
PO BOX 488, LIVERMORE, CA 94551-0488
PO BOX 489, LIVERMORE, CA 94551-0489
PO BOX 490, LIVERMORE, CA 94551-0490
PO BOX 491, LIVERMORE, CA 94551-0491
PO BOX 492, LIVERMORE, CA 94551-0492
PO BOX 493, LIVERMORE, CA 94551-0493
PO BOX 494, LIVERMORE, CA 94551-0494
PO BOX 495, LIVERMORE, CA 94551-0495
PO BOX 496, LIVERMORE, CA 94551-0496
PO BOX 497, LIVERMORE, CA 94551-0497
PO BOX 498, LIVERMORE, CA 94551-0498
PO BOX 499, LIVERMORE, CA 94551-0499
PO BOX 500, LIVERMORE, CA 94551-0500
PO BOX 501, LIVERMORE, CA 94551-0501
PO BOX 502, LIVERMORE, CA 94551-0502
PO BOX 503, LIVERMORE, CA 94551-0503
PO BOX 504, LIVERMORE, CA 94551-0504
PO BOX 505, LIVERMORE, CA 94551-0505
PO BOX 506, LIVERMORE, CA 94551-0506
PO BOX 507, LIVERMORE, CA 94551-0507
PO BOX 508, LIVERMORE, CA 94551-0508
PO BOX 509, LIVERMORE, CA 94551-0509
PO BOX 510, LIVERMORE, CA 94551-0510
PO BOX 511, LIVERMORE, CA 94551-0511
PO BOX 512, LIVERMORE, CA 94551-0512
PO BOX 513, LIVERMORE, CA 94551-0513
PO BOX 514, LIVERMORE, CA 94551-0514
PO BOX 515, LIVERMORE, CA 94551-0515
PO BOX 516, LIVERMORE, CA 94551-0516
PO BOX 517, LIVERMORE, CA 94551-0517
PO BOX 518, LIVERMORE, CA 94551-0518
PO BOX 519, LIVERMORE, CA 94551-0519
PO BOX 520, LIVERMORE, CA 94551-0520
PO BOX 521, LIVERMORE, CA 94551-0521
PO BOX 522, LIVERMORE, CA 94551-0522
PO BOX 523, LIVERMORE, CA 94551-0523
PO BOX 524, LIVERMORE, CA 94551-0524
PO BOX 525, LIVERMORE, CA 94551-0525
PO BOX 526, LIVERMORE, CA 94551-0526
PO BOX 527, LIVERMORE, CA 94551-0527
PO BOX 528, LIVERMORE, CA 94551-0528
PO BOX 529, LIVERMORE, CA 94551-0529
PO BOX 530, LIVERMORE, CA 94551-0530
PO BOX 531, LIVERMORE, CA 94551-0531
PO BOX 532, LIVERMORE, CA 94551-0532
PO BOX 533, LIVERMORE, CA 94551-0533
PO BOX 534, LIVERMORE, CA 94551-0534
PO BOX 535, LIVERMORE, CA 94551-0535
PO BOX 536, LIVERMORE, CA 94551-0536
PO BOX 537, LIVERMORE, CA 94551-0537
PO BOX 538, LIVERMORE, CA 94551-0538
PO BOX 539, LIVERMORE, CA 94551-0539
PO BOX 540, LIVERMORE, CA 94551-0540
PO BOX 541, LIVERMORE, CA 94551-0541
PO BOX 542, LIVERMORE, CA 94551-0542
PO BOX 543, LIVERMORE, CA 94551-0543
PO BOX 544, LIVERMORE, CA 94551-0544
PO BOX 545, LIVERMORE, CA 94551-0545
PO BOX 546, LIVERMORE, CA 94551-0546
PO BOX 547, LIVERMORE, CA 94551-0547
PO BOX 548, LIVERMORE, CA 94551-0548
PO BOX 549, LIVERMORE, CA 94551-0549
PO BOX 550, LIVERMORE, CA 94551-0550
PO BOX 551, LIVERMORE, CA 94551-0551
PO BOX 552, LIVERMORE, CA 94551-0552
PO BOX 553, LIVERMORE, CA 94551-0553
PO BOX 554, LIVERMORE, CA 94551-0554
PO BOX 555, LIVERMORE, CA 94551-0555
PO BOX 556, LIVERMORE, CA 94551-0556
PO BOX 557, LIVERMORE, CA 94551-0557
PO BOX 558, LIVERMORE, CA 94551-0558
PO BOX 559, LIVERMORE, CA 94551-0559
PO BOX 560, LIVERMORE, CA 94551-0560
PO BOX 561, LIVERMORE, CA 94551-0561
PO BOX 562, LIVERMORE, CA 94551-0562
PO BOX 563, LIVERMORE, CA 94551-0563
PO BOX 564, LIVERMORE, CA 94551-0564
PO BOX 565, LIVERMORE, CA 94551-0565
PO BOX 566, LIVERMORE, CA 94551-0566
PO BOX 567, LIVERMORE, CA 94551-0567
PO BOX 568, LIVERMORE, CA 94551-0568
PO BOX 569, LIVERMORE, CA 94551-0569
PO BOX 570, LIVERMORE, CA 94551-0570
PO BOX 571, LIVERMORE, CA 94551-0571
PO BOX 572, LIVERMORE, CA 94551-0572
PO BOX 573, LIVERMORE, CA 94551-0573
PO BOX 574, LIVERMORE, CA 94551-0574
PO BOX 575, LIVERMORE, CA 94551-0575
PO BOX 576, LIVERMORE, CA 94551-0576
PO BOX 577, LIVERMORE, CA 94551-0577
PO BOX 578, LIVERMORE, CA 94551-0578
PO BOX 579, LIVERMORE, CA 94551-0579
PO BOX 580, LIVERMORE, CA 94551-0580
PO BOX 581, LIVERMORE, CA 94551-0581
PO BOX 582, LIVERMORE, CA 94551-0582
PO BOX 583, LIVERMORE, CA 94551-0583
PO BOX 584, LIVERMORE, CA 94551-0584
PO BOX 585, LIVERMORE, CA 94551-0585
PO BOX 586, LIVERMORE, CA 94551-0586
PO BOX 587, LIVERMORE, CA 94551-0587
PO BOX 588, LIVERMORE, CA 94551-0588
PO BOX 589, LIVERMORE, CA 94551-0589
PO BOX 590, LIVERMORE, CA 94551-0590
PO BOX 591, LIVERMORE, CA 94551-0591
PO BOX 592, LIVERMORE, CA 94551-0592
PO BOX 593, LIVERMORE, CA 94551-0593
PO BOX 594, LIVERMORE, CA 94551-0594
PO BOX 595, LIVERMORE, CA 94551-0595
PO BOX 596, LIVERMORE, CA 94551-0596
PO BOX 597, LIVERMORE, CA 94551-0597
PO BOX 598, LIVERMORE, CA 94551-0598
PO BOX 599, LIVERMORE, CA 94551-0599
PO BOX 600, LIVERMORE, CA 94551-0600
PO BOX 601, LIVERMORE, CA 94551-0601
PO BOX 602, LIVERMORE, CA 94551-0602
PO BOX 603, LIVERMORE, CA 94551-0603
PO BOX 604, LIVERMORE, CA 94551-0604
PO BOX 605, LIVERMORE, CA 94551-0605
PO BOX 606, LIVERMORE, CA 94551-0606
PO BOX 607, LIVERMORE, CA 94551-0607
PO BOX 608, LIVERMORE, CA 94551-0608
PO BOX 609, LIVERMORE, CA 94551-0609
PO BOX 610, LIVERMORE, CA 94551-0610
PO BOX 611, LIVERMORE, CA 94551-0611
PO BOX 612, LIVERMORE, CA 94551-0612
PO BOX 613, LIVERMORE, CA 94551-0613
PO BOX 614, LIVERMORE, CA 94551-0614
PO BOX 615, LIVERMORE, CA 94551-0615
PO BOX 616, LIVERMORE, CA 94551-0616
PO BOX 617, LIVERMORE, CA 94551-0617
PO BOX 618, LIVERMORE, CA 94551-0618
PO BOX 619, LIVERMORE, CA 94551-0619
PO BOX 620, LIVERMORE, CA 94551-0620
PO BOX 621, LIVERMORE, CA 94551-0621
PO BOX 622, LIVERMORE, CA 94551-0622
PO BOX 623, LIVERMORE, CA 94551-0623
PO BOX 624, LIVERMORE, CA 94551-0624
PO BOX 625, LIVERMORE, CA 94551-0625
PO BOX 626, LIVERMORE, CA 94551-0626
PO BOX 627, LIVERMORE, CA 94551-0627
PO BOX 628, LIVERMORE, CA 94551-0628
PO BOX 629, LIVERMORE, CA 94551-0629
PO BOX 630, LIVERMORE, CA 94551-0630
PO BOX 631, LIVERMORE, CA 94551-0631
PO BOX 632, LIVERMORE, CA 94551-0632
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