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 680601, SAN ANTONIO, TX 78268-0601
PO BOX 680602, SAN ANTONIO, TX 78268-0602
PO BOX 680603, SAN ANTONIO, TX 78268-0603
PO BOX 680604, SAN ANTONIO, TX 78268-0604
PO BOX 680605, SAN ANTONIO, TX 78268-0605
PO BOX 680606, SAN ANTONIO, TX 78268-0606
PO BOX 680607, SAN ANTONIO, TX 78268-0607
PO BOX 680608, SAN ANTONIO, TX 78268-0608
PO BOX 680609, SAN ANTONIO, TX 78268-0609
PO BOX 680610, SAN ANTONIO, TX 78268-0610
PO BOX 680611, SAN ANTONIO, TX 78268-0611
PO BOX 680612, SAN ANTONIO, TX 78268-0612
PO BOX 680613, SAN ANTONIO, TX 78268-0613
PO BOX 680614, SAN ANTONIO, TX 78268-0614
PO BOX 680615, SAN ANTONIO, TX 78268-0615
PO BOX 680616, SAN ANTONIO, TX 78268-0616
PO BOX 680617, SAN ANTONIO, TX 78268-0617
PO BOX 680618, SAN ANTONIO, TX 78268-0618
PO BOX 680619, SAN ANTONIO, TX 78268-0619
PO BOX 680620, SAN ANTONIO, TX 78268-0620
PO BOX 680621, SAN ANTONIO, TX 78268-0621
PO BOX 680622, SAN ANTONIO, TX 78268-0622
PO BOX 680623, SAN ANTONIO, TX 78268-0623
PO BOX 680624, SAN ANTONIO, TX 78268-0624
PO BOX 680625, SAN ANTONIO, TX 78268-0625
PO BOX 680626, SAN ANTONIO, TX 78268-0626
PO BOX 680627, SAN ANTONIO, TX 78268-0627
PO BOX 680628, SAN ANTONIO, TX 78268-0628
PO BOX 680629, SAN ANTONIO, TX 78268-0629
PO BOX 680630, SAN ANTONIO, TX 78268-0630
PO BOX 680631, SAN ANTONIO, TX 78268-0631
PO BOX 680632, SAN ANTONIO, TX 78268-0632
PO BOX 680633, SAN ANTONIO, TX 78268-0633
PO BOX 680634, SAN ANTONIO, TX 78268-0634
PO BOX 680635, SAN ANTONIO, TX 78268-0635
PO BOX 680636, SAN ANTONIO, TX 78268-0636
PO BOX 680637, SAN ANTONIO, TX 78268-0637
PO BOX 680638, SAN ANTONIO, TX 78268-0638
PO BOX 680639, SAN ANTONIO, TX 78268-0639
PO BOX 680640, SAN ANTONIO, TX 78268-0640
PO BOX 680641, SAN ANTONIO, TX 78268-0641
PO BOX 680642, SAN ANTONIO, TX 78268-0642
PO BOX 680643, SAN ANTONIO, TX 78268-0643
PO BOX 680644, SAN ANTONIO, TX 78268-0644
PO BOX 680645, SAN ANTONIO, TX 78268-0645
PO BOX 680646, SAN ANTONIO, TX 78268-0646
PO BOX 680647, SAN ANTONIO, TX 78268-0647
PO BOX 680648, SAN ANTONIO, TX 78268-0648
PO BOX 680649, SAN ANTONIO, TX 78268-0649
PO BOX 680650, SAN ANTONIO, TX 78268-0650
PO BOX 680651, SAN ANTONIO, TX 78268-0651
PO BOX 680652, SAN ANTONIO, TX 78268-0652
PO BOX 680653, SAN ANTONIO, TX 78268-0653
PO BOX 680654, SAN ANTONIO, TX 78268-0654
PO BOX 680655, SAN ANTONIO, TX 78268-0655
PO BOX 680656, SAN ANTONIO, TX 78268-0656
PO BOX 680657, SAN ANTONIO, TX 78268-0657
PO BOX 680658, SAN ANTONIO, TX 78268-0658
PO BOX 680659, SAN ANTONIO, TX 78268-0659
PO BOX 680660, SAN ANTONIO, TX 78268-0660
PO BOX 680661, SAN ANTONIO, TX 78268-0661
PO BOX 680662, SAN ANTONIO, TX 78268-0662
PO BOX 680663, SAN ANTONIO, TX 78268-0663
PO BOX 680664, SAN ANTONIO, TX 78268-0664
PO BOX 680665, SAN ANTONIO, TX 78268-0665
PO BOX 680666, SAN ANTONIO, TX 78268-0666
PO BOX 680667, SAN ANTONIO, TX 78268-0667
PO BOX 680668, SAN ANTONIO, TX 78268-0668
PO BOX 680669, SAN ANTONIO, TX 78268-0669
PO BOX 680670, SAN ANTONIO, TX 78268-0670
PO BOX 680671, SAN ANTONIO, TX 78268-0671
PO BOX 680672, SAN ANTONIO, TX 78268-0672
PO BOX 680673, SAN ANTONIO, TX 78268-0673
PO BOX 680674, SAN ANTONIO, TX 78268-0674
PO BOX 680675, SAN ANTONIO, TX 78268-0675
PO BOX 680676, SAN ANTONIO, TX 78268-0676
PO BOX 680677, SAN ANTONIO, TX 78268-0677
PO BOX 680678, SAN ANTONIO, TX 78268-0678
PO BOX 680679, SAN ANTONIO, TX 78268-0679
PO BOX 680680, SAN ANTONIO, TX 78268-0680
PO BOX 680681, SAN ANTONIO, TX 78268-0681
PO BOX 680682, SAN ANTONIO, TX 78268-0682
PO BOX 680683, SAN ANTONIO, TX 78268-0683
PO BOX 680684, SAN ANTONIO, TX 78268-0684
PO BOX 680685, SAN ANTONIO, TX 78268-0685
PO BOX 680686, SAN ANTONIO, TX 78268-0686
PO BOX 680687, SAN ANTONIO, TX 78268-0687
PO BOX 680688, SAN ANTONIO, TX 78268-0688
PO BOX 680689, SAN ANTONIO, TX 78268-0689
PO BOX 680690, SAN ANTONIO, TX 78268-0690
PO BOX 680691, SAN ANTONIO, TX 78268-0691
PO BOX 680692, SAN ANTONIO, TX 78268-0692
PO BOX 680693, SAN ANTONIO, TX 78268-0693
PO BOX 680694, SAN ANTONIO, TX 78268-0694
PO BOX 680695, SAN ANTONIO, TX 78268-0695
PO BOX 680696, SAN ANTONIO, TX 78268-0696
PO BOX 680697, SAN ANTONIO, TX 78268-0697
PO BOX 680698, SAN ANTONIO, TX 78268-0698
PO BOX 680699, SAN ANTONIO, TX 78268-0699
PO BOX 680700, SAN ANTONIO, TX 78268-0700
PO BOX 680701, SAN ANTONIO, TX 78268-0701
PO BOX 680702, SAN ANTONIO, TX 78268-0702
PO BOX 680703, SAN ANTONIO, TX 78268-0703
PO BOX 680704, SAN ANTONIO, TX 78268-0704
PO BOX 680705, SAN ANTONIO, TX 78268-0705
PO BOX 680706, SAN ANTONIO, TX 78268-0706
PO BOX 680707, SAN ANTONIO, TX 78268-0707
PO BOX 680708, SAN ANTONIO, TX 78268-0708
PO BOX 680709, SAN ANTONIO, TX 78268-0709
PO BOX 680710, SAN ANTONIO, TX 78268-0710
PO BOX 680711, SAN ANTONIO, TX 78268-0711
PO BOX 680712, SAN ANTONIO, TX 78268-0712
PO BOX 680713, SAN ANTONIO, TX 78268-0713
PO BOX 680714, SAN ANTONIO, TX 78268-0714
PO BOX 680715, SAN ANTONIO, TX 78268-0715
PO BOX 680716, SAN ANTONIO, TX 78268-0716
PO BOX 680717, SAN ANTONIO, TX 78268-0717
PO BOX 680718, SAN ANTONIO, TX 78268-0718
PO BOX 680719, SAN ANTONIO, TX 78268-0719
PO BOX 680720, SAN ANTONIO, TX 78268-0720
PO BOX 680721, SAN ANTONIO, TX 78268-0721
PO BOX 680722, SAN ANTONIO, TX 78268-0722
PO BOX 680723, SAN ANTONIO, TX 78268-0723
PO BOX 680724, SAN ANTONIO, TX 78268-0724
PO BOX 680725, SAN ANTONIO, TX 78268-0725
PO BOX 680726, SAN ANTONIO, TX 78268-0726
PO BOX 680727, SAN ANTONIO, TX 78268-0727
PO BOX 680728, SAN ANTONIO, TX 78268-0728
PO BOX 680729, SAN ANTONIO, TX 78268-0729
PO BOX 680730, SAN ANTONIO, TX 78268-0730
PO BOX 680731, SAN ANTONIO, TX 78268-0731
PO BOX 680732, SAN ANTONIO, TX 78268-0732
PO BOX 680733, SAN ANTONIO, TX 78268-0733
PO BOX 680734, SAN ANTONIO, TX 78268-0734
PO BOX 680735, SAN ANTONIO, TX 78268-0735
PO BOX 680736, SAN ANTONIO, TX 78268-0736
PO BOX 680737, SAN ANTONIO, TX 78268-0737
PO BOX 680738, SAN ANTONIO, TX 78268-0738
PO BOX 680739, SAN ANTONIO, TX 78268-0739
PO BOX 680740, SAN ANTONIO, TX 78268-0740
PO BOX 680741, SAN ANTONIO, TX 78268-0741
PO BOX 680742, SAN ANTONIO, TX 78268-0742
PO BOX 680743, SAN ANTONIO, TX 78268-0743
PO BOX 680744, SAN ANTONIO, TX 78268-0744
PO BOX 680745, SAN ANTONIO, TX 78268-0745
PO BOX 680746, SAN ANTONIO, TX 78268-0746
PO BOX 680747, SAN ANTONIO, TX 78268-0747
PO BOX 680748, SAN ANTONIO, TX 78268-0748
PO BOX 680749, SAN ANTONIO, TX 78268-0749
PO BOX 680750, SAN ANTONIO, TX 78268-0750
PO BOX 680751, SAN ANTONIO, TX 78268-0751
PO BOX 680752, SAN ANTONIO, TX 78268-0752
PO BOX 680753, SAN ANTONIO, TX 78268-0753
PO BOX 680754, SAN ANTONIO, TX 78268-0754
PO BOX 680755, SAN ANTONIO, TX 78268-0755
PO BOX 680756, SAN ANTONIO, TX 78268-0756
PO BOX 680757, SAN ANTONIO, TX 78268-0757
PO BOX 680758, SAN ANTONIO, TX 78268-0758
PO BOX 680759, SAN ANTONIO, TX 78268-0759
PO BOX 680760, SAN ANTONIO, TX 78268-0760
PO BOX 680761, SAN ANTONIO, TX 78268-0761
PO BOX 680762, SAN ANTONIO, TX 78268-0762
PO BOX 680763, SAN ANTONIO, TX 78268-0763
PO BOX 680764, SAN ANTONIO, TX 78268-0764
PO BOX 680765, SAN ANTONIO, TX 78268-0765
PO BOX 680766, SAN ANTONIO, TX 78268-0766
PO BOX 680767, SAN ANTONIO, TX 78268-0767
PO BOX 680768, SAN ANTONIO, TX 78268-0768
PO BOX 680769, SAN ANTONIO, TX 78268-0769
PO BOX 680770, SAN ANTONIO, TX 78268-0770
PO BOX 680771, SAN ANTONIO, TX 78268-0771
PO BOX 680772, SAN ANTONIO, TX 78268-0772
PO BOX 680773, SAN ANTONIO, TX 78268-0773
PO BOX 680774, SAN ANTONIO, TX 78268-0774
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