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 27481, SAN ANTONIO, TX 78227-0481
PO BOX 27482, SAN ANTONIO, TX 78227-0482
PO BOX 27483, SAN ANTONIO, TX 78227-0483
PO BOX 27484, SAN ANTONIO, TX 78227-0484
PO BOX 27485, SAN ANTONIO, TX 78227-0485
PO BOX 27486, SAN ANTONIO, TX 78227-0486
PO BOX 27487, SAN ANTONIO, TX 78227-0487
PO BOX 27488, SAN ANTONIO, TX 78227-0488
PO BOX 27489, SAN ANTONIO, TX 78227-0489
PO BOX 27490, SAN ANTONIO, TX 78227-0490
PO BOX 27491, SAN ANTONIO, TX 78227-0491
PO BOX 27492, SAN ANTONIO, TX 78227-0492
PO BOX 27493, SAN ANTONIO, TX 78227-0493
PO BOX 27494, SAN ANTONIO, TX 78227-0494
PO BOX 27495, SAN ANTONIO, TX 78227-0495
PO BOX 27496, SAN ANTONIO, TX 78227-0496
PO BOX 27497, SAN ANTONIO, TX 78227-0497
PO BOX 27498, SAN ANTONIO, TX 78227-0498
PO BOX 27499, SAN ANTONIO, TX 78227-0499
PO BOX 27500, SAN ANTONIO, TX 78227-0500
PO BOX 27501, SAN ANTONIO, TX 78227-0501
PO BOX 27502, SAN ANTONIO, TX 78227-0502
PO BOX 27503, SAN ANTONIO, TX 78227-0503
PO BOX 27504, SAN ANTONIO, TX 78227-0504
PO BOX 27505, SAN ANTONIO, TX 78227-0505
PO BOX 27506, SAN ANTONIO, TX 78227-0506
PO BOX 27507, SAN ANTONIO, TX 78227-0507
PO BOX 27508, SAN ANTONIO, TX 78227-0508
PO BOX 27509, SAN ANTONIO, TX 78227-0509
PO BOX 27510, SAN ANTONIO, TX 78227-0510
PO BOX 27511, SAN ANTONIO, TX 78227-0511
PO BOX 27512, SAN ANTONIO, TX 78227-0512
PO BOX 27513, SAN ANTONIO, TX 78227-0513
PO BOX 27514, SAN ANTONIO, TX 78227-0514
PO BOX 27515, SAN ANTONIO, TX 78227-0515
PO BOX 27516, SAN ANTONIO, TX 78227-0516
PO BOX 27517, SAN ANTONIO, TX 78227-0517
PO BOX 27518, SAN ANTONIO, TX 78227-0518
PO BOX 27519, SAN ANTONIO, TX 78227-0519
PO BOX 27520, SAN ANTONIO, TX 78227-0520
PO BOX 27521, SAN ANTONIO, TX 78227-0521
PO BOX 27522, SAN ANTONIO, TX 78227-0522
PO BOX 27523, SAN ANTONIO, TX 78227-0523
PO BOX 27524, SAN ANTONIO, TX 78227-0524
PO BOX 27525, SAN ANTONIO, TX 78227-0525
PO BOX 27526, SAN ANTONIO, TX 78227-0526
PO BOX 27527, SAN ANTONIO, TX 78227-0527
PO BOX 27528, SAN ANTONIO, TX 78227-0528
PO BOX 27529, SAN ANTONIO, TX 78227-0529
PO BOX 27530, SAN ANTONIO, TX 78227-0530
PO BOX 27531, SAN ANTONIO, TX 78227-0531
PO BOX 27532, SAN ANTONIO, TX 78227-0532
PO BOX 27533, SAN ANTONIO, TX 78227-0533
PO BOX 27534, SAN ANTONIO, TX 78227-0534
PO BOX 27535, SAN ANTONIO, TX 78227-0535
PO BOX 27536, SAN ANTONIO, TX 78227-0536
PO BOX 27537, SAN ANTONIO, TX 78227-0537
PO BOX 27538, SAN ANTONIO, TX 78227-0538
PO BOX 27539, SAN ANTONIO, TX 78227-0539
PO BOX 27540, SAN ANTONIO, TX 78227-0540
PO BOX 27541, SAN ANTONIO, TX 78227-0541
PO BOX 27542, SAN ANTONIO, TX 78227-0542
PO BOX 27543, SAN ANTONIO, TX 78227-0543
PO BOX 27544, SAN ANTONIO, TX 78227-0544
PO BOX 27545, SAN ANTONIO, TX 78227-0545
PO BOX 27546, SAN ANTONIO, TX 78227-0546
PO BOX 27547, SAN ANTONIO, TX 78227-0547
PO BOX 27548, SAN ANTONIO, TX 78227-0548
PO BOX 27549, SAN ANTONIO, TX 78227-0549
PO BOX 27550, SAN ANTONIO, TX 78227-0550
PO BOX 27551, SAN ANTONIO, TX 78227-0551
PO BOX 27552, SAN ANTONIO, TX 78227-0552
PO BOX 27553, SAN ANTONIO, TX 78227-0553
PO BOX 27554, SAN ANTONIO, TX 78227-0554
PO BOX 27555, SAN ANTONIO, TX 78227-0555
PO BOX 27556, SAN ANTONIO, TX 78227-0556
PO BOX 27557, SAN ANTONIO, TX 78227-0557
PO BOX 27558, SAN ANTONIO, TX 78227-0558
PO BOX 27559, SAN ANTONIO, TX 78227-0559
PO BOX 27560, SAN ANTONIO, TX 78227-0560
PO BOX 27561, SAN ANTONIO, TX 78227-0561
PO BOX 27562, SAN ANTONIO, TX 78227-0562
PO BOX 27563, SAN ANTONIO, TX 78227-0563
PO BOX 27564, SAN ANTONIO, TX 78227-0564
PO BOX 27565, SAN ANTONIO, TX 78227-0565
PO BOX 27566, SAN ANTONIO, TX 78227-0566
PO BOX 27567, SAN ANTONIO, TX 78227-0567
PO BOX 27568, SAN ANTONIO, TX 78227-0568
PO BOX 27569, SAN ANTONIO, TX 78227-0569
PO BOX 27570, SAN ANTONIO, TX 78227-0570
PO BOX 27571, SAN ANTONIO, TX 78227-0571
PO BOX 27572, SAN ANTONIO, TX 78227-0572
PO BOX 27573, SAN ANTONIO, TX 78227-0573
PO BOX 27574, SAN ANTONIO, TX 78227-0574
PO BOX 27575, SAN ANTONIO, TX 78227-0575
PO BOX 27576, SAN ANTONIO, TX 78227-0576
PO BOX 27577, SAN ANTONIO, TX 78227-0577
PO BOX 27578, SAN ANTONIO, TX 78227-0578
PO BOX 27579, SAN ANTONIO, TX 78227-0579
PO BOX 27580, SAN ANTONIO, TX 78227-0580
PO BOX 27581, SAN ANTONIO, TX 78227-0581
PO BOX 27582, SAN ANTONIO, TX 78227-0582
PO BOX 27583, SAN ANTONIO, TX 78227-0583
PO BOX 27584, SAN ANTONIO, TX 78227-0584
PO BOX 27585, SAN ANTONIO, TX 78227-0585
PO BOX 27586, SAN ANTONIO, TX 78227-0586
PO BOX 27587, SAN ANTONIO, TX 78227-0587
PO BOX 27588, SAN ANTONIO, TX 78227-0588
PO BOX 27589, SAN ANTONIO, TX 78227-0589
PO BOX 27590, SAN ANTONIO, TX 78227-0590
PO BOX 27591, SAN ANTONIO, TX 78227-0591
PO BOX 27592, SAN ANTONIO, TX 78227-0592
PO BOX 27593, SAN ANTONIO, TX 78227-0593
PO BOX 27594, SAN ANTONIO, TX 78227-0594
PO BOX 27595, SAN ANTONIO, TX 78227-0595
PO BOX 27596, SAN ANTONIO, TX 78227-0596
PO BOX 27597, SAN ANTONIO, TX 78227-0597
PO BOX 27598, SAN ANTONIO, TX 78227-0598
PO BOX 27599, SAN ANTONIO, TX 78227-0599
PO BOX 27600, SAN ANTONIO, TX 78227-0600
PO BOX 27601, SAN ANTONIO, TX 78227-0601
PO BOX 27602, SAN ANTONIO, TX 78227-0602
PO BOX 27603, SAN ANTONIO, TX 78227-0603
PO BOX 27604, SAN ANTONIO, TX 78227-0604
PO BOX 27605, SAN ANTONIO, TX 78227-0605
PO BOX 27606, SAN ANTONIO, TX 78227-0606
PO BOX 27607, SAN ANTONIO, TX 78227-0607
PO BOX 27608, SAN ANTONIO, TX 78227-0608
PO BOX 27609, SAN ANTONIO, TX 78227-0609
PO BOX 27610, SAN ANTONIO, TX 78227-0610
PO BOX 27611, SAN ANTONIO, TX 78227-0611
PO BOX 27612, SAN ANTONIO, TX 78227-0612
PO BOX 27613, SAN ANTONIO, TX 78227-0613
PO BOX 27614, SAN ANTONIO, TX 78227-0614
PO BOX 27615, SAN ANTONIO, TX 78227-0615
PO BOX 27616, SAN ANTONIO, TX 78227-0616
PO BOX 27617, SAN ANTONIO, TX 78227-0617
PO BOX 27618, SAN ANTONIO, TX 78227-0618
PO BOX 27619, SAN ANTONIO, TX 78227-0619
PO BOX 27620, SAN ANTONIO, TX 78227-0620
PO BOX 27621, SAN ANTONIO, TX 78227-0621
PO BOX 27622, SAN ANTONIO, TX 78227-0622
PO BOX 27623, SAN ANTONIO, TX 78227-0623
PO BOX 27624, SAN ANTONIO, TX 78227-0624
PO BOX 27625, SAN ANTONIO, TX 78227-0625
PO BOX 27626, SAN ANTONIO, TX 78227-0626
PO BOX 27627, SAN ANTONIO, TX 78227-0627
PO BOX 27628, SAN ANTONIO, TX 78227-0628
PO BOX 27629, SAN ANTONIO, TX 78227-0629
PO BOX 27630, SAN ANTONIO, TX 78227-0630
PO BOX 27631, SAN ANTONIO, TX 78227-0631
PO BOX 27632, SAN ANTONIO, TX 78227-0632
PO BOX 27633, SAN ANTONIO, TX 78227-0633
PO BOX 27634, SAN ANTONIO, TX 78227-0634
PO BOX 27635, SAN ANTONIO, TX 78227-0635
PO BOX 27636, SAN ANTONIO, TX 78227-0636
PO BOX 27637, SAN ANTONIO, TX 78227-0637
PO BOX 27638, SAN ANTONIO, TX 78227-0638
PO BOX 27639, SAN ANTONIO, TX 78227-0639
PO BOX 27640, SAN ANTONIO, TX 78227-0640
PO BOX 27641, SAN ANTONIO, TX 78227-0641
PO BOX 27642, SAN ANTONIO, TX 78227-0642
PO BOX 27643, SAN ANTONIO, TX 78227-0643
PO BOX 27644, SAN ANTONIO, TX 78227-0644
PO BOX 27645, SAN ANTONIO, TX 78227-0645
PO BOX 27646, SAN ANTONIO, TX 78227-0646
PO BOX 27647, SAN ANTONIO, TX 78227-0647
PO BOX 27648, SAN ANTONIO, TX 78227-0648
PO BOX 27649, SAN ANTONIO, TX 78227-0649
PO BOX 27650, SAN ANTONIO, TX 78227-0650
PO BOX 27651, SAN ANTONIO, TX 78227-0651
PO BOX 27652, SAN ANTONIO, TX 78227-0652
PO BOX 27653, SAN ANTONIO, TX 78227-0653
PO BOX 27654, SAN ANTONIO, TX 78227-0654
PO BOX 27655, SAN ANTONIO, TX 78227-0655
PO BOX 27656, SAN ANTONIO, TX 78227-0656
PO BOX 27657, SAN ANTONIO, TX 78227-0657
PO BOX 27658, SAN ANTONIO, TX 78227-0658
PO BOX 27659, SAN ANTONIO, TX 78227-0659
PO BOX 27660, SAN ANTONIO, TX 78227-0660
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