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 53600, PHOENIX, AZ 85072-3600
PO BOX 53601, PHOENIX, AZ 85072-3601
PO BOX 53602, PHOENIX, AZ 85072-3602
PO BOX 53603, PHOENIX, AZ 85072-3603
PO BOX 53604, PHOENIX, AZ 85072-3604
PO BOX 53605, PHOENIX, AZ 85072-3605
PO BOX 53606, PHOENIX, AZ 85072-3606
PO BOX 53607, PHOENIX, AZ 85072-3607
PO BOX 53608, PHOENIX, AZ 85072-3608
PO BOX 53609, PHOENIX, AZ 85072-3609
PO BOX 53610, PHOENIX, AZ 85072-3610
PO BOX 53611, PHOENIX, AZ 85072-3611
PO BOX 53612, PHOENIX, AZ 85072-3612
PO BOX 53613, PHOENIX, AZ 85072-3613
PO BOX 53614, PHOENIX, AZ 85072-3614
PO BOX 53615, PHOENIX, AZ 85072-3615
PO BOX 53616, PHOENIX, AZ 85072-3616
PO BOX 53617, PHOENIX, AZ 85072-3617
PO BOX 53618, PHOENIX, AZ 85072-3618
PO BOX 53619, PHOENIX, AZ 85072-3619
PO BOX 53620, PHOENIX, AZ 85072-3620
PO BOX 53621, PHOENIX, AZ 85072-3621
PO BOX 53622, PHOENIX, AZ 85072-3622
PO BOX 53623, PHOENIX, AZ 85072-3623
PO BOX 53624, PHOENIX, AZ 85072-3624
PO BOX 53625, PHOENIX, AZ 85072-3625
PO BOX 53626, PHOENIX, AZ 85072-3626
PO BOX 53627, PHOENIX, AZ 85072-3627
PO BOX 53628, PHOENIX, AZ 85072-3628
PO BOX 53629, PHOENIX, AZ 85072-3629
PO BOX 53630, PHOENIX, AZ 85072-3630
PO BOX 53631, PHOENIX, AZ 85072-3631
PO BOX 53632, PHOENIX, AZ 85072-3632
PO BOX 53633, PHOENIX, AZ 85072-3633
PO BOX 53634, PHOENIX, AZ 85072-3634
PO BOX 53635, PHOENIX, AZ 85072-3635
PO BOX 53636, PHOENIX, AZ 85072-3636
PO BOX 53637, PHOENIX, AZ 85072-3637
PO BOX 53638, PHOENIX, AZ 85072-3638
PO BOX 53639, PHOENIX, AZ 85072-3639
PO BOX 53640, PHOENIX, AZ 85072-3640
PO BOX 53641, PHOENIX, AZ 85072-3641
PO BOX 53642, PHOENIX, AZ 85072-3642
PO BOX 53643, PHOENIX, AZ 85072-3643
PO BOX 53644, PHOENIX, AZ 85072-3644
PO BOX 53645, PHOENIX, AZ 85072-3645
PO BOX 53646, PHOENIX, AZ 85072-3646
PO BOX 53647, PHOENIX, AZ 85072-3647
PO BOX 53648, PHOENIX, AZ 85072-3648
PO BOX 53649, PHOENIX, AZ 85072-3649
PO BOX 53650, PHOENIX, AZ 85072-3650
PO BOX 53651, PHOENIX, AZ 85072-3651
PO BOX 53652, PHOENIX, AZ 85072-3652
PO BOX 53653, PHOENIX, AZ 85072-3653
PO BOX 53654, PHOENIX, AZ 85072-3654
PO BOX 53655, PHOENIX, AZ 85072-3655
PO BOX 53656, PHOENIX, AZ 85072-3656
PO BOX 53657, PHOENIX, AZ 85072-3657
PO BOX 53658, PHOENIX, AZ 85072-3658
PO BOX 53659, PHOENIX, AZ 85072-3659
PO BOX 53660, PHOENIX, AZ 85072-3660
PO BOX 53661, PHOENIX, AZ 85072-3661
PO BOX 53662, PHOENIX, AZ 85072-3662
PO BOX 53663, PHOENIX, AZ 85072-3663
PO BOX 53664, PHOENIX, AZ 85072-3664
PO BOX 53665, PHOENIX, AZ 85072-3665
PO BOX 53666, PHOENIX, AZ 85072-3666
PO BOX 53667, PHOENIX, AZ 85072-3667
PO BOX 53668, PHOENIX, AZ 85072-3668
PO BOX 53669, PHOENIX, AZ 85072-3669
PO BOX 53670, PHOENIX, AZ 85072-3670
PO BOX 53671, PHOENIX, AZ 85072-3671
PO BOX 53672, PHOENIX, AZ 85072-3672
PO BOX 53673, PHOENIX, AZ 85072-3673
PO BOX 53674, PHOENIX, AZ 85072-3674
PO BOX 53675, PHOENIX, AZ 85072-3675
PO BOX 53676, PHOENIX, AZ 85072-3676
PO BOX 53677, PHOENIX, AZ 85072-3677
PO BOX 53678, PHOENIX, AZ 85072-3678
PO BOX 53679, PHOENIX, AZ 85072-3679
PO BOX 53680, PHOENIX, AZ 85072-3680
PO BOX 53681, PHOENIX, AZ 85072-3681
PO BOX 53682, PHOENIX, AZ 85072-3682
PO BOX 53683, PHOENIX, AZ 85072-3683
PO BOX 53684, PHOENIX, AZ 85072-3684
PO BOX 53685, PHOENIX, AZ 85072-3685
PO BOX 53686, PHOENIX, AZ 85072-3686
PO BOX 53687, PHOENIX, AZ 85072-3687
PO BOX 53688, PHOENIX, AZ 85072-3688
PO BOX 53689, PHOENIX, AZ 85072-3689
PO BOX 53690, PHOENIX, AZ 85072-3690
PO BOX 53691, PHOENIX, AZ 85072-3691
PO BOX 53692, PHOENIX, AZ 85072-3692
PO BOX 53693, PHOENIX, AZ 85072-3693
PO BOX 53694, PHOENIX, AZ 85072-3694
PO BOX 53695, PHOENIX, AZ 85072-3695
PO BOX 53696, PHOENIX, AZ 85072-3696
PO BOX 53697, PHOENIX, AZ 85072-3697
PO BOX 53698, PHOENIX, AZ 85072-3698
PO BOX 53699, PHOENIX, AZ 85072-3699
PO BOX 53700, PHOENIX, AZ 85072-3700
PO BOX 53701, PHOENIX, AZ 85072-3701
PO BOX 53702, PHOENIX, AZ 85072-3702
PO BOX 53703, PHOENIX, AZ 85072-3703
PO BOX 53704, PHOENIX, AZ 85072-3704
PO BOX 53705, PHOENIX, AZ 85072-3705
PO BOX 53706, PHOENIX, AZ 85072-3706
PO BOX 53707, PHOENIX, AZ 85072-3707
PO BOX 53708, PHOENIX, AZ 85072-3708
PO BOX 53709, PHOENIX, AZ 85072-3709
PO BOX 53710, PHOENIX, AZ 85072-3710
PO BOX 53711, PHOENIX, AZ 85072-3711
PO BOX 53712, PHOENIX, AZ 85072-3712
PO BOX 53713, PHOENIX, AZ 85072-3713
PO BOX 53714, PHOENIX, AZ 85072-3714
PO BOX 53715, PHOENIX, AZ 85072-3715
PO BOX 53716, PHOENIX, AZ 85072-3716
PO BOX 53717, PHOENIX, AZ 85072-3717
PO BOX 53718, PHOENIX, AZ 85072-3718
PO BOX 53719, PHOENIX, AZ 85072-3719
PO BOX 53720, PHOENIX, AZ 85072-3720
PO BOX 53721, PHOENIX, AZ 85072-3721
PO BOX 53722, PHOENIX, AZ 85072-3722
PO BOX 53723, PHOENIX, AZ 85072-3723
PO BOX 53724, PHOENIX, AZ 85072-3724
PO BOX 53725, PHOENIX, AZ 85072-3725
PO BOX 53726, PHOENIX, AZ 85072-3726
PO BOX 53727, PHOENIX, AZ 85072-3727
PO BOX 53728, PHOENIX, AZ 85072-3728
PO BOX 53729, PHOENIX, AZ 85072-3729
PO BOX 53730, PHOENIX, AZ 85072-3730
PO BOX 53731, PHOENIX, AZ 85072-3731
PO BOX 53732, PHOENIX, AZ 85072-3732
PO BOX 53733, PHOENIX, AZ 85072-3733
PO BOX 53734, PHOENIX, AZ 85072-3734
PO BOX 53735, PHOENIX, AZ 85072-3735
PO BOX 53736, PHOENIX, AZ 85072-3736
PO BOX 53737, PHOENIX, AZ 85072-3737
PO BOX 53738, PHOENIX, AZ 85072-3738
PO BOX 53739, PHOENIX, AZ 85072-3739
PO BOX 53740, PHOENIX, AZ 85072-3740
PO BOX 53741, PHOENIX, AZ 85072-3741
PO BOX 53742, PHOENIX, AZ 85072-3742
PO BOX 53743, PHOENIX, AZ 85072-3743
PO BOX 53744, PHOENIX, AZ 85072-3744
PO BOX 53745, PHOENIX, AZ 85072-3745
PO BOX 53746, PHOENIX, AZ 85072-3746
PO BOX 53747, PHOENIX, AZ 85072-3747
PO BOX 53748, PHOENIX, AZ 85072-3748
PO BOX 53749, PHOENIX, AZ 85072-3749
PO BOX 53750, PHOENIX, AZ 85072-3750
PO BOX 53751, PHOENIX, AZ 85072-3751
PO BOX 53752, PHOENIX, AZ 85072-3752
PO BOX 53753, PHOENIX, AZ 85072-3753
PO BOX 53754, PHOENIX, AZ 85072-3754
PO BOX 53755, PHOENIX, AZ 85072-3755
PO BOX 53756, PHOENIX, AZ 85072-3756
PO BOX 53757, PHOENIX, AZ 85072-3757
PO BOX 53758, PHOENIX, AZ 85072-3758
PO BOX 53759, PHOENIX, AZ 85072-3759
PO BOX 53760, PHOENIX, AZ 85072-3760
PO BOX 53761, PHOENIX, AZ 85072-3761
PO BOX 53762, PHOENIX, AZ 85072-3762
PO BOX 53763, PHOENIX, AZ 85072-3763
PO BOX 53764, PHOENIX, AZ 85072-3764
PO BOX 53765, PHOENIX, AZ 85072-3765
PO BOX 53766, PHOENIX, AZ 85072-3766
PO BOX 53767, PHOENIX, AZ 85072-3767
PO BOX 53768, PHOENIX, AZ 85072-3768
PO BOX 53769, PHOENIX, AZ 85072-3769
PO BOX 53770, PHOENIX, AZ 85072-3770
PO BOX 53771, PHOENIX, AZ 85072-3771
PO BOX 53772, PHOENIX, AZ 85072-3772
PO BOX 53773, PHOENIX, AZ 85072-3773
PO BOX 53774, PHOENIX, AZ 85072-3774
PO BOX 53775, PHOENIX, AZ 85072-3775
PO BOX 53776, PHOENIX, AZ 85072-3776
PO BOX 53777, PHOENIX, AZ 85072-3777
PO BOX 53778, PHOENIX, AZ 85072-3778
PO BOX 53779, PHOENIX, AZ 85072-3779
PO BOX 53780, PHOENIX, AZ 85072-3780
PO BOX 53781, PHOENIX, AZ 85072-3781
PO BOX 53782, PHOENIX, AZ 85072-3782
PO BOX 53783, PHOENIX, AZ 85072-3783
PO BOX 53784, PHOENIX, AZ 85072-3784
PO BOX 53785, PHOENIX, AZ 85072-3785
PO BOX 53786, PHOENIX, AZ 85072-3786
PO BOX 53787, PHOENIX, AZ 85072-3787
PO BOX 53788, PHOENIX, AZ 85072-3788
PO BOX 53789, PHOENIX, AZ 85072-3789
PO BOX 53790, PHOENIX, AZ 85072-3790
PO BOX 53791, PHOENIX, AZ 85072-3791
PO BOX 53792, PHOENIX, AZ 85072-3792
PO BOX 53793, PHOENIX, AZ 85072-3793
PO BOX 53794, PHOENIX, AZ 85072-3794
PO BOX 53795, PHOENIX, AZ 85072-3795
PO BOX 53796, PHOENIX, AZ 85072-3796
PO BOX 53797, PHOENIX, AZ 85072-3797
PO BOX 53798, PHOENIX, AZ 85072-3798
PO BOX 53799, PHOENIX, AZ 85072-3799
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