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 571, SOUTHERN PINES, NC 28388-0571
PO BOX 572, SOUTHERN PINES, NC 28388-0572
PO BOX 573, SOUTHERN PINES, NC 28388-0573
PO BOX 574, SOUTHERN PINES, NC 28388-0574
PO BOX 575, SOUTHERN PINES, NC 28388-0575
PO BOX 576, SOUTHERN PINES, NC 28388-0576
PO BOX 577, SOUTHERN PINES, NC 28388-0577
PO BOX 578, SOUTHERN PINES, NC 28388-0578
PO BOX 579, SOUTHERN PINES, NC 28388-0579
PO BOX 580, SOUTHERN PINES, NC 28388-0580
PO BOX 581, SOUTHERN PINES, NC 28388-0581
PO BOX 582, SOUTHERN PINES, NC 28388-0582
PO BOX 583, SOUTHERN PINES, NC 28388-0583
PO BOX 584, SOUTHERN PINES, NC 28388-0584
PO BOX 585, SOUTHERN PINES, NC 28388-0585
PO BOX 586, SOUTHERN PINES, NC 28388-0586
PO BOX 587, SOUTHERN PINES, NC 28388-0587
PO BOX 588, SOUTHERN PINES, NC 28388-0588
PO BOX 589, SOUTHERN PINES, NC 28388-0589
PO BOX 590, SOUTHERN PINES, NC 28388-0590
PO BOX 591, SOUTHERN PINES, NC 28388-0591
PO BOX 592, SOUTHERN PINES, NC 28388-0592
PO BOX 593, SOUTHERN PINES, NC 28388-0593
PO BOX 594, SOUTHERN PINES, NC 28388-0594
PO BOX 595, SOUTHERN PINES, NC 28388-0595
PO BOX 596, SOUTHERN PINES, NC 28388-0596
PO BOX 597, SOUTHERN PINES, NC 28388-0597
PO BOX 598, SOUTHERN PINES, NC 28388-0598
PO BOX 599, SOUTHERN PINES, NC 28388-0599
PO BOX 600, SOUTHERN PINES, NC 28388-0600
PO BOX 601, SOUTHERN PINES, NC 28388-0601
PO BOX 602, SOUTHERN PINES, NC 28388-0602
PO BOX 603, SOUTHERN PINES, NC 28388-0603
PO BOX 604, SOUTHERN PINES, NC 28388-0604
PO BOX 605, SOUTHERN PINES, NC 28388-0605
PO BOX 606, SOUTHERN PINES, NC 28388-0606
PO BOX 607, SOUTHERN PINES, NC 28388-0607
PO BOX 608, SOUTHERN PINES, NC 28388-0608
PO BOX 609, SOUTHERN PINES, NC 28388-0609
PO BOX 610, SOUTHERN PINES, NC 28388-0610
PO BOX 611, SOUTHERN PINES, NC 28388-0611
PO BOX 612, SOUTHERN PINES, NC 28388-0612
PO BOX 613, SOUTHERN PINES, NC 28388-0613
PO BOX 614, SOUTHERN PINES, NC 28388-0614
PO BOX 615, SOUTHERN PINES, NC 28388-0615
PO BOX 616, SOUTHERN PINES, NC 28388-0616
PO BOX 617, SOUTHERN PINES, NC 28388-0617
PO BOX 618, SOUTHERN PINES, NC 28388-0618
PO BOX 619, SOUTHERN PINES, NC 28388-0619
PO BOX 620, SOUTHERN PINES, NC 28388-0620
PO BOX 621, SOUTHERN PINES, NC 28388-0621
PO BOX 622, SOUTHERN PINES, NC 28388-0622
PO BOX 623, SOUTHERN PINES, NC 28388-0623
PO BOX 624, SOUTHERN PINES, NC 28388-0624
PO BOX 625, SOUTHERN PINES, NC 28388-0625
PO BOX 626, SOUTHERN PINES, NC 28388-0626
PO BOX 627, SOUTHERN PINES, NC 28388-0627
PO BOX 628, SOUTHERN PINES, NC 28388-0628
PO BOX 629, SOUTHERN PINES, NC 28388-0629
PO BOX 630, SOUTHERN PINES, NC 28388-0630
PO BOX 631, SOUTHERN PINES, NC 28388-0631
PO BOX 632, SOUTHERN PINES, NC 28388-0632
PO BOX 633, SOUTHERN PINES, NC 28388-0633
PO BOX 634, SOUTHERN PINES, NC 28388-0634
PO BOX 635, SOUTHERN PINES, NC 28388-0635
PO BOX 636, SOUTHERN PINES, NC 28388-0636
PO BOX 637, SOUTHERN PINES, NC 28388-0637
PO BOX 638, SOUTHERN PINES, NC 28388-0638
PO BOX 639, SOUTHERN PINES, NC 28388-0639
PO BOX 640, SOUTHERN PINES, NC 28388-0640
PO BOX 641, SOUTHERN PINES, NC 28388-0641
PO BOX 642, SOUTHERN PINES, NC 28388-0642
PO BOX 643, SOUTHERN PINES, NC 28388-0643
PO BOX 644, SOUTHERN PINES, NC 28388-0644
PO BOX 645, SOUTHERN PINES, NC 28388-0645
PO BOX 646, SOUTHERN PINES, NC 28388-0646
PO BOX 647, SOUTHERN PINES, NC 28388-0647
PO BOX 648, SOUTHERN PINES, NC 28388-0648
PO BOX 649, SOUTHERN PINES, NC 28388-0649
PO BOX 650, SOUTHERN PINES, NC 28388-0650
PO BOX 651, SOUTHERN PINES, NC 28388-0651
PO BOX 652, SOUTHERN PINES, NC 28388-0652
PO BOX 653, SOUTHERN PINES, NC 28388-0653
PO BOX 654, SOUTHERN PINES, NC 28388-0654
PO BOX 655, SOUTHERN PINES, NC 28388-0655
PO BOX 656, SOUTHERN PINES, NC 28388-0656
PO BOX 657, SOUTHERN PINES, NC 28388-0657
PO BOX 658, SOUTHERN PINES, NC 28388-0658
PO BOX 659, SOUTHERN PINES, NC 28388-0659
PO BOX 660, SOUTHERN PINES, NC 28388-0660
PO BOX 661, SOUTHERN PINES, NC 28388-0661
PO BOX 662, SOUTHERN PINES, NC 28388-0662
PO BOX 663, SOUTHERN PINES, NC 28388-0663
PO BOX 664, SOUTHERN PINES, NC 28388-0664
PO BOX 665, SOUTHERN PINES, NC 28388-0665
PO BOX 666, SOUTHERN PINES, NC 28388-0666
PO BOX 667, SOUTHERN PINES, NC 28388-0667
PO BOX 668, SOUTHERN PINES, NC 28388-0668
PO BOX 669, SOUTHERN PINES, NC 28388-0669
PO BOX 670, SOUTHERN PINES, NC 28388-0670
PO BOX 671, SOUTHERN PINES, NC 28388-0671
PO BOX 672, SOUTHERN PINES, NC 28388-0672
PO BOX 673, SOUTHERN PINES, NC 28388-0673
PO BOX 674, SOUTHERN PINES, NC 28388-0674
PO BOX 675, SOUTHERN PINES, NC 28388-0675
PO BOX 676, SOUTHERN PINES, NC 28388-0676
PO BOX 677, SOUTHERN PINES, NC 28388-0677
PO BOX 678, SOUTHERN PINES, NC 28388-0678
PO BOX 679, SOUTHERN PINES, NC 28388-0679
PO BOX 680, SOUTHERN PINES, NC 28388-0680
PO BOX 681, SOUTHERN PINES, NC 28388-0681
PO BOX 682, SOUTHERN PINES, NC 28388-0682
PO BOX 683, SOUTHERN PINES, NC 28388-0683
PO BOX 684, SOUTHERN PINES, NC 28388-0684
PO BOX 685, SOUTHERN PINES, NC 28388-0685
PO BOX 686, SOUTHERN PINES, NC 28388-0686
PO BOX 687, SOUTHERN PINES, NC 28388-0687
PO BOX 688, SOUTHERN PINES, NC 28388-0688
PO BOX 689, SOUTHERN PINES, NC 28388-0689
PO BOX 690, SOUTHERN PINES, NC 28388-0690
PO BOX 691, SOUTHERN PINES, NC 28388-0691
PO BOX 692, SOUTHERN PINES, NC 28388-0692
PO BOX 693, SOUTHERN PINES, NC 28388-0693
PO BOX 694, SOUTHERN PINES, NC 28388-0694
PO BOX 695, SOUTHERN PINES, NC 28388-0695
PO BOX 696, SOUTHERN PINES, NC 28388-0696
PO BOX 697, SOUTHERN PINES, NC 28388-0697
PO BOX 698, SOUTHERN PINES, NC 28388-0698
PO BOX 699, SOUTHERN PINES, NC 28388-0699
PO BOX 700, SOUTHERN PINES, NC 28388-0700
PO BOX 701, SOUTHERN PINES, NC 28388-0701
PO BOX 702, SOUTHERN PINES, NC 28388-0702
PO BOX 703, SOUTHERN PINES, NC 28388-0703
PO BOX 704, SOUTHERN PINES, NC 28388-0704
PO BOX 705, SOUTHERN PINES, NC 28388-0705
PO BOX 706, SOUTHERN PINES, NC 28388-0706
PO BOX 707, SOUTHERN PINES, NC 28388-0707
PO BOX 708, SOUTHERN PINES, NC 28388-0708
PO BOX 709, SOUTHERN PINES, NC 28388-0709
PO BOX 710, SOUTHERN PINES, NC 28388-0710
PO BOX 711, SOUTHERN PINES, NC 28388-0711
PO BOX 712, SOUTHERN PINES, NC 28388-0712
PO BOX 713, SOUTHERN PINES, NC 28388-0713
PO BOX 714, SOUTHERN PINES, NC 28388-0714
PO BOX 715, SOUTHERN PINES, NC 28388-0715
PO BOX 716, SOUTHERN PINES, NC 28388-0716
PO BOX 717, SOUTHERN PINES, NC 28388-0717
PO BOX 718, SOUTHERN PINES, NC 28388-0718
PO BOX 719, SOUTHERN PINES, NC 28388-0719
PO BOX 720, SOUTHERN PINES, NC 28388-0720
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