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 661, BLAIR, OK 73526-0661
PO BOX 662, BLAIR, OK 73526-0662
PO BOX 663, BLAIR, OK 73526-0663
PO BOX 664, BLAIR, OK 73526-0664
PO BOX 665, BLAIR, OK 73526-0665
PO BOX 666, BLAIR, OK 73526-0666
PO BOX 667, BLAIR, OK 73526-0667
PO BOX 668, BLAIR, OK 73526-0668
PO BOX 669, BLAIR, OK 73526-0669
PO BOX 670, BLAIR, OK 73526-0670
PO BOX 671, BLAIR, OK 73526-0671
PO BOX 672, BLAIR, OK 73526-0672
PO BOX 673, BLAIR, OK 73526-0673
PO BOX 674, BLAIR, OK 73526-0674
PO BOX 675, BLAIR, OK 73526-0675
PO BOX 676, BLAIR, OK 73526-0676
PO BOX 677, BLAIR, OK 73526-0677
PO BOX 678, BLAIR, OK 73526-0678
PO BOX 679, BLAIR, OK 73526-0679
PO BOX 680, BLAIR, OK 73526-0680
PO BOX 681, BLAIR, OK 73526-0681
PO BOX 682, BLAIR, OK 73526-0682
PO BOX 683, BLAIR, OK 73526-0683
PO BOX 684, BLAIR, OK 73526-0684
PO BOX 685, BLAIR, OK 73526-0685
PO BOX 686, BLAIR, OK 73526-0686
PO BOX 687, BLAIR, OK 73526-0687
PO BOX 688, BLAIR, OK 73526-0688
PO BOX 689, BLAIR, OK 73526-0689
PO BOX 690, BLAIR, OK 73526-0690
PO BOX 691, BLAIR, OK 73526-0691
PO BOX 692, BLAIR, OK 73526-0692
PO BOX 693, BLAIR, OK 73526-0693
PO BOX 694, BLAIR, OK 73526-0694
PO BOX 695, BLAIR, OK 73526-0695
PO BOX 696, BLAIR, OK 73526-0696
PO BOX 697, BLAIR, OK 73526-0697
PO BOX 698, BLAIR, OK 73526-0698
PO BOX 699, BLAIR, OK 73526-0699
PO BOX 700, BLAIR, OK 73526-0700
PO BOX 701, BLAIR, OK 73526-0701
PO BOX 702, BLAIR, OK 73526-0702
PO BOX 703, BLAIR, OK 73526-0703
PO BOX 704, BLAIR, OK 73526-0704
PO BOX 705, BLAIR, OK 73526-0705
PO BOX 706, BLAIR, OK 73526-0706
PO BOX 707, BLAIR, OK 73526-0707
PO BOX 708, BLAIR, OK 73526-0708
PO BOX 709, BLAIR, OK 73526-0709
PO BOX 710, BLAIR, OK 73526-0710
PO BOX 711, BLAIR, OK 73526-0711
PO BOX 712, BLAIR, OK 73526-0712
PO BOX 713, BLAIR, OK 73526-0713
PO BOX 714, BLAIR, OK 73526-0714
PO BOX 715, BLAIR, OK 73526-0715
PO BOX 716, BLAIR, OK 73526-0716
PO BOX 717, BLAIR, OK 73526-0717
PO BOX 718, BLAIR, OK 73526-0718
PO BOX 719, BLAIR, OK 73526-0719
PO BOX 720, BLAIR, OK 73526-0720
PO BOX 721, BLAIR, OK 73526-0721
PO BOX 722, BLAIR, OK 73526-0722
PO BOX 723, BLAIR, OK 73526-0723
PO BOX 724, BLAIR, OK 73526-0724
PO BOX 725, BLAIR, OK 73526-0725
PO BOX 726, BLAIR, OK 73526-0726
PO BOX 727, BLAIR, OK 73526-0727
PO BOX 728, BLAIR, OK 73526-0728
PO BOX 729, BLAIR, OK 73526-0729
PO BOX 730, BLAIR, OK 73526-0730
PO BOX 731, BLAIR, OK 73526-0731
PO BOX 732, BLAIR, OK 73526-0732
PO BOX 733, BLAIR, OK 73526-0733
PO BOX 734, BLAIR, OK 73526-0734
PO BOX 735, BLAIR, OK 73526-0735
PO BOX 736, BLAIR, OK 73526-0736
PO BOX 737, BLAIR, OK 73526-0737
PO BOX 738, BLAIR, OK 73526-0738
PO BOX 739, BLAIR, OK 73526-0739
PO BOX 740, BLAIR, OK 73526-0740
PO BOX 741, BLAIR, OK 73526-0741
PO BOX 742, BLAIR, OK 73526-0742
PO BOX 743, BLAIR, OK 73526-0743
PO BOX 744, BLAIR, OK 73526-0744
PO BOX 745, BLAIR, OK 73526-0745
PO BOX 746, BLAIR, OK 73526-0746
PO BOX 747, BLAIR, OK 73526-0747
PO BOX 748, BLAIR, OK 73526-0748
PO BOX 749, BLAIR, OK 73526-0749
PO BOX 750, BLAIR, OK 73526-0750
PO BOX 751, BLAIR, OK 73526-0751
PO BOX 752, BLAIR, OK 73526-0752
PO BOX 753, BLAIR, OK 73526-0753
PO BOX 754, BLAIR, OK 73526-0754
PO BOX 755, BLAIR, OK 73526-0755
PO BOX 756, BLAIR, OK 73526-0756
PO BOX 757, BLAIR, OK 73526-0757
PO BOX 758, BLAIR, OK 73526-0758
PO BOX 759, BLAIR, OK 73526-0759
PO BOX 760, BLAIR, OK 73526-0760
PO BOX 761, BLAIR, OK 73526-0761
PO BOX 762, BLAIR, OK 73526-0762
PO BOX 763, BLAIR, OK 73526-0763
PO BOX 764, BLAIR, OK 73526-0764
PO BOX 765, BLAIR, OK 73526-0765
PO BOX 766, BLAIR, OK 73526-0766
PO BOX 767, BLAIR, OK 73526-0767
PO BOX 768, BLAIR, OK 73526-0768
PO BOX 769, BLAIR, OK 73526-0769
PO BOX 770, BLAIR, OK 73526-0770
PO BOX 771, BLAIR, OK 73526-0771
PO BOX 772, BLAIR, OK 73526-0772
PO BOX 773, BLAIR, OK 73526-0773
PO BOX 774, BLAIR, OK 73526-0774
PO BOX 775, BLAIR, OK 73526-0775
PO BOX 776, BLAIR, OK 73526-0776
PO BOX 777, BLAIR, OK 73526-0777
PO BOX 778, BLAIR, OK 73526-0778
PO BOX 779, BLAIR, OK 73526-0779
PO BOX 780, BLAIR, OK 73526-0780
PO BOX 781, BLAIR, OK 73526-0781
PO BOX 782, BLAIR, OK 73526-0782
PO BOX 783, BLAIR, OK 73526-0783
PO BOX 784, BLAIR, OK 73526-0784
PO BOX 785, BLAIR, OK 73526-0785
PO BOX 786, BLAIR, OK 73526-0786
PO BOX 787, BLAIR, OK 73526-0787
PO BOX 788, BLAIR, OK 73526-0788
PO BOX 789, BLAIR, OK 73526-0789
PO BOX 790, BLAIR, OK 73526-0790
PO BOX 791, BLAIR, OK 73526-0791
PO BOX 792, BLAIR, OK 73526-0792
PO BOX 793, BLAIR, OK 73526-0793
PO BOX 794, BLAIR, OK 73526-0794
PO BOX 795, BLAIR, OK 73526-0795
PO BOX 796, BLAIR, OK 73526-0796
PO BOX 797, BLAIR, OK 73526-0797
PO BOX 798, BLAIR, OK 73526-0798
PO BOX 799, BLAIR, OK 73526-0799
PO BOX 800, BLAIR, OK 73526-0800
PO BOX 801, BLAIR, OK 73526-0801
PO BOX 802, BLAIR, OK 73526-0802
PO BOX 803, BLAIR, OK 73526-0803
PO BOX 804, BLAIR, OK 73526-0804
PO BOX 805, BLAIR, OK 73526-0805
PO BOX 806, BLAIR, OK 73526-0806
PO BOX 807, BLAIR, OK 73526-0807
PO BOX 808, BLAIR, OK 73526-0808
PO BOX 809, BLAIR, OK 73526-0809
PO BOX 810, BLAIR, OK 73526-0810
PO BOX 811, BLAIR, OK 73526-0811
PO BOX 812, BLAIR, OK 73526-0812
PO BOX 813, BLAIR, OK 73526-0813
PO BOX 814, BLAIR, OK 73526-0814
PO BOX 815, BLAIR, OK 73526-0815
PO BOX 816, BLAIR, OK 73526-0816
PO BOX 817, BLAIR, OK 73526-0817
PO BOX 818, BLAIR, OK 73526-0818
PO BOX 819, BLAIR, OK 73526-0819
PO BOX 820, BLAIR, OK 73526-0820
PO BOX 821, BLAIR, OK 73526-0821
PO BOX 822, BLAIR, OK 73526-0822
PO BOX 823, BLAIR, OK 73526-0823
PO BOX 824, BLAIR, OK 73526-0824
PO BOX 825, BLAIR, OK 73526-0825
PO BOX 826, BLAIR, OK 73526-0826
PO BOX 827, BLAIR, OK 73526-0827
PO BOX 828, BLAIR, OK 73526-0828
PO BOX 829, BLAIR, OK 73526-0829
PO BOX 830, BLAIR, OK 73526-0830
PO BOX 831, BLAIR, OK 73526-0831
PO BOX 832, BLAIR, OK 73526-0832
PO BOX 833, BLAIR, OK 73526-0833
PO BOX 834, BLAIR, OK 73526-0834
PO BOX 835, BLAIR, OK 73526-0835
PO BOX 836, BLAIR, OK 73526-0836
PO BOX 837, BLAIR, OK 73526-0837
PO BOX 838, BLAIR, OK 73526-0838
PO BOX 839, BLAIR, OK 73526-0839
PO BOX 840, BLAIR, OK 73526-0840
PO BOX 841, BLAIR, OK 73526-0841
PO BOX 842, BLAIR, OK 73526-0842
PO BOX 843, BLAIR, OK 73526-0843
PO BOX 844, BLAIR, OK 73526-0844
PO BOX 845, BLAIR, OK 73526-0845
PO BOX 846, BLAIR, OK 73526-0846
PO BOX 847, BLAIR, OK 73526-0847
PO BOX 848, BLAIR, OK 73526-0848
PO BOX 849, BLAIR, OK 73526-0849
PO BOX 850, BLAIR, OK 73526-0850
PO BOX 851, BLAIR, OK 73526-0851
PO BOX 852, BLAIR, OK 73526-0852
PO BOX 853, BLAIR, OK 73526-0853
PO BOX 854, BLAIR, OK 73526-0854
PO BOX 855, BLAIR, OK 73526-0855
PO BOX 856, BLAIR, OK 73526-0856
PO BOX 857, BLAIR, OK 73526-0857
PO BOX 858, BLAIR, OK 73526-0858
PO BOX 859, BLAIR, OK 73526-0859
PO BOX 860, BLAIR, OK 73526-0860
PO BOX 861, BLAIR, OK 73526-0861
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