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 541, CATHEDRAL CITY, CA 92235-0541
PO BOX 542, CATHEDRAL CITY, CA 92235-0542
PO BOX 543, CATHEDRAL CITY, CA 92235-0543
PO BOX 544, CATHEDRAL CITY, CA 92235-0544
PO BOX 545, CATHEDRAL CITY, CA 92235-0545
PO BOX 546, CATHEDRAL CITY, CA 92235-0546
PO BOX 547, CATHEDRAL CITY, CA 92235-0547
PO BOX 548, CATHEDRAL CITY, CA 92235-0548
PO BOX 549, CATHEDRAL CITY, CA 92235-0549
PO BOX 550, CATHEDRAL CITY, CA 92235-0550
PO BOX 551, CATHEDRAL CITY, CA 92235-0551
PO BOX 552, CATHEDRAL CITY, CA 92235-0552
PO BOX 553, CATHEDRAL CITY, CA 92235-0553
PO BOX 554, CATHEDRAL CITY, CA 92235-0554
PO BOX 555, CATHEDRAL CITY, CA 92235-0555
PO BOX 556, CATHEDRAL CITY, CA 92235-0556
PO BOX 557, CATHEDRAL CITY, CA 92235-0557
PO BOX 558, CATHEDRAL CITY, CA 92235-0558
PO BOX 559, CATHEDRAL CITY, CA 92235-0559
PO BOX 560, CATHEDRAL CITY, CA 92235-0560
PO BOX 561, CATHEDRAL CITY, CA 92235-0561
PO BOX 562, CATHEDRAL CITY, CA 92235-0562
PO BOX 563, CATHEDRAL CITY, CA 92235-0563
PO BOX 564, CATHEDRAL CITY, CA 92235-0564
PO BOX 565, CATHEDRAL CITY, CA 92235-0565
PO BOX 566, CATHEDRAL CITY, CA 92235-0566
PO BOX 567, CATHEDRAL CITY, CA 92235-0567
PO BOX 568, CATHEDRAL CITY, CA 92235-0568
PO BOX 569, CATHEDRAL CITY, CA 92235-0569
PO BOX 570, CATHEDRAL CITY, CA 92235-0570
PO BOX 571, CATHEDRAL CITY, CA 92235-0571
PO BOX 572, CATHEDRAL CITY, CA 92235-0572
PO BOX 573, CATHEDRAL CITY, CA 92235-0573
PO BOX 574, CATHEDRAL CITY, CA 92235-0574
PO BOX 575, CATHEDRAL CITY, CA 92235-0575
PO BOX 576, CATHEDRAL CITY, CA 92235-0576
PO BOX 577, CATHEDRAL CITY, CA 92235-0577
PO BOX 578, CATHEDRAL CITY, CA 92235-0578
PO BOX 579, CATHEDRAL CITY, CA 92235-0579
PO BOX 580, CATHEDRAL CITY, CA 92235-0580
PO BOX 581, CATHEDRAL CITY, CA 92235-0581
PO BOX 582, CATHEDRAL CITY, CA 92235-0582
PO BOX 583, CATHEDRAL CITY, CA 92235-0583
PO BOX 584, CATHEDRAL CITY, CA 92235-0584
PO BOX 585, CATHEDRAL CITY, CA 92235-0585
PO BOX 586, CATHEDRAL CITY, CA 92235-0586
PO BOX 587, CATHEDRAL CITY, CA 92235-0587
PO BOX 588, CATHEDRAL CITY, CA 92235-0588
PO BOX 589, CATHEDRAL CITY, CA 92235-0589
PO BOX 590, CATHEDRAL CITY, CA 92235-0590
PO BOX 591, CATHEDRAL CITY, CA 92235-0591
PO BOX 592, CATHEDRAL CITY, CA 92235-0592
PO BOX 593, CATHEDRAL CITY, CA 92235-0593
PO BOX 594, CATHEDRAL CITY, CA 92235-0594
PO BOX 595, CATHEDRAL CITY, CA 92235-0595
PO BOX 596, CATHEDRAL CITY, CA 92235-0596
PO BOX 597, CATHEDRAL CITY, CA 92235-0597
PO BOX 598, CATHEDRAL CITY, CA 92235-0598
PO BOX 599, CATHEDRAL CITY, CA 92235-0599
PO BOX 600, CATHEDRAL CITY, CA 92235-0600
PO BOX 601, CATHEDRAL CITY, CA 92235-0601
PO BOX 602, CATHEDRAL CITY, CA 92235-0602
PO BOX 603, CATHEDRAL CITY, CA 92235-0603
PO BOX 604, CATHEDRAL CITY, CA 92235-0604
PO BOX 605, CATHEDRAL CITY, CA 92235-0605
PO BOX 606, CATHEDRAL CITY, CA 92235-0606
PO BOX 607, CATHEDRAL CITY, CA 92235-0607
PO BOX 608, CATHEDRAL CITY, CA 92235-0608
PO BOX 609, CATHEDRAL CITY, CA 92235-0609
PO BOX 610, CATHEDRAL CITY, CA 92235-0610
PO BOX 611, CATHEDRAL CITY, CA 92235-0611
PO BOX 612, CATHEDRAL CITY, CA 92235-0612
PO BOX 613, CATHEDRAL CITY, CA 92235-0613
PO BOX 614, CATHEDRAL CITY, CA 92235-0614
PO BOX 615, CATHEDRAL CITY, CA 92235-0615
PO BOX 616, CATHEDRAL CITY, CA 92235-0616
PO BOX 617, CATHEDRAL CITY, CA 92235-0617
PO BOX 618, CATHEDRAL CITY, CA 92235-0618
PO BOX 619, CATHEDRAL CITY, CA 92235-0619
PO BOX 620, CATHEDRAL CITY, CA 92235-0620
PO BOX 621, CATHEDRAL CITY, CA 92235-0621
PO BOX 622, CATHEDRAL CITY, CA 92235-0622
PO BOX 623, CATHEDRAL CITY, CA 92235-0623
PO BOX 624, CATHEDRAL CITY, CA 92235-0624
PO BOX 625, CATHEDRAL CITY, CA 92235-0625
PO BOX 626, CATHEDRAL CITY, CA 92235-0626
PO BOX 627, CATHEDRAL CITY, CA 92235-0627
PO BOX 628, CATHEDRAL CITY, CA 92235-0628
PO BOX 629, CATHEDRAL CITY, CA 92235-0629
PO BOX 630, CATHEDRAL CITY, CA 92235-0630
PO BOX 631, CATHEDRAL CITY, CA 92235-0631
PO BOX 632, CATHEDRAL CITY, CA 92235-0632
PO BOX 633, CATHEDRAL CITY, CA 92235-0633
PO BOX 634, CATHEDRAL CITY, CA 92235-0634
PO BOX 635, CATHEDRAL CITY, CA 92235-0635
PO BOX 636, CATHEDRAL CITY, CA 92235-0636
PO BOX 637, CATHEDRAL CITY, CA 92235-0637
PO BOX 638, CATHEDRAL CITY, CA 92235-0638
PO BOX 639, CATHEDRAL CITY, CA 92235-0639
PO BOX 640, CATHEDRAL CITY, CA 92235-0640
PO BOX 641, CATHEDRAL CITY, CA 92235-0641
PO BOX 642, CATHEDRAL CITY, CA 92235-0642
PO BOX 643, CATHEDRAL CITY, CA 92235-0643
PO BOX 644, CATHEDRAL CITY, CA 92235-0644
PO BOX 645, CATHEDRAL CITY, CA 92235-0645
PO BOX 646, CATHEDRAL CITY, CA 92235-0646
PO BOX 647, CATHEDRAL CITY, CA 92235-0647
PO BOX 648, CATHEDRAL CITY, CA 92235-0648
PO BOX 649, CATHEDRAL CITY, CA 92235-0649
PO BOX 650, CATHEDRAL CITY, CA 92235-0650
PO BOX 651, CATHEDRAL CITY, CA 92235-0651
PO BOX 652, CATHEDRAL CITY, CA 92235-0652
PO BOX 653, CATHEDRAL CITY, CA 92235-0653
PO BOX 654, CATHEDRAL CITY, CA 92235-0654
PO BOX 655, CATHEDRAL CITY, CA 92235-0655
PO BOX 656, CATHEDRAL CITY, CA 92235-0656
PO BOX 657, CATHEDRAL CITY, CA 92235-0657
PO BOX 658, CATHEDRAL CITY, CA 92235-0658
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