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 5441, CHARLOTTE, NC 28299-5441
PO BOX 5442, CHARLOTTE, NC 28299-5442
PO BOX 5443, CHARLOTTE, NC 28299-5443
PO BOX 5444, CHARLOTTE, NC 28299-5444
PO BOX 5445, CHARLOTTE, NC 28299-5445
PO BOX 5446, CHARLOTTE, NC 28299-5446
PO BOX 5447, CHARLOTTE, NC 28299-5447
PO BOX 5448, CHARLOTTE, NC 28299-5448
PO BOX 5449, CHARLOTTE, NC 28299-5449
PO BOX 5450, CHARLOTTE, NC 28299-5450
PO BOX 5451, CHARLOTTE, NC 28299-5451
PO BOX 5452, CHARLOTTE, NC 28299-5452
PO BOX 5453, CHARLOTTE, NC 28299-5453
PO BOX 5454, CHARLOTTE, NC 28299-5454
PO BOX 5455, CHARLOTTE, NC 28299-5455
PO BOX 5456, CHARLOTTE, NC 28299-5456
PO BOX 5457, CHARLOTTE, NC 28299-5457
PO BOX 5458, CHARLOTTE, NC 28299-5458
PO BOX 5459, CHARLOTTE, NC 28299-5459
PO BOX 5460, CHARLOTTE, NC 28299-5460
PO BOX 5461, CHARLOTTE, NC 28299-5461
PO BOX 5462, CHARLOTTE, NC 28299-5462
PO BOX 5463, CHARLOTTE, NC 28299-5463
PO BOX 5464, CHARLOTTE, NC 28299-5464
PO BOX 5465, CHARLOTTE, NC 28299-5465
PO BOX 5466, CHARLOTTE, NC 28299-5466
PO BOX 5467, CHARLOTTE, NC 28299-5467
PO BOX 5468, CHARLOTTE, NC 28299-5468
PO BOX 5469, CHARLOTTE, NC 28299-5469
PO BOX 5470, CHARLOTTE, NC 28299-5470
PO BOX 5471, CHARLOTTE, NC 28299-5471
PO BOX 5472, CHARLOTTE, NC 28299-5472
PO BOX 5473, CHARLOTTE, NC 28299-5473
PO BOX 5474, CHARLOTTE, NC 28299-5474
PO BOX 5475, CHARLOTTE, NC 28299-5475
PO BOX 5476, CHARLOTTE, NC 28299-5476
PO BOX 5477, CHARLOTTE, NC 28299-5477
PO BOX 5478, CHARLOTTE, NC 28299-5478
PO BOX 5479, CHARLOTTE, NC 28299-5479
PO BOX 5480, CHARLOTTE, NC 28299-5480
PO BOX 5481, CHARLOTTE, NC 28299-5481
PO BOX 5482, CHARLOTTE, NC 28299-5482
PO BOX 5483, CHARLOTTE, NC 28299-5483
PO BOX 5484, CHARLOTTE, NC 28299-5484
PO BOX 5485, CHARLOTTE, NC 28299-5485
PO BOX 5486, CHARLOTTE, NC 28299-5486
PO BOX 5487, CHARLOTTE, NC 28299-5487
PO BOX 5488, CHARLOTTE, NC 28299-5488
PO BOX 5489, CHARLOTTE, NC 28299-5489
PO BOX 5490, CHARLOTTE, NC 28299-5490
PO BOX 5491, CHARLOTTE, NC 28299-5491
PO BOX 5492, CHARLOTTE, NC 28299-5492
PO BOX 5493, CHARLOTTE, NC 28299-5493
PO BOX 5494, CHARLOTTE, NC 28299-5494
PO BOX 5495, CHARLOTTE, NC 28299-5495
PO BOX 5496, CHARLOTTE, NC 28299-5496
PO BOX 5497, CHARLOTTE, NC 28299-5497
PO BOX 5498, CHARLOTTE, NC 28299-5498
PO BOX 5499, CHARLOTTE, NC 28299-5499
PO BOX 5500, CHARLOTTE, NC 28299-5500
PO BOX 5501, CHARLOTTE, NC 28299-5501
PO BOX 5502, CHARLOTTE, NC 28299-5502
PO BOX 5503, CHARLOTTE, NC 28299-5503
PO BOX 5504, CHARLOTTE, NC 28299-5504
PO BOX 5505, CHARLOTTE, NC 28299-5505
PO BOX 5506, CHARLOTTE, NC 28299-5506
PO BOX 5507, CHARLOTTE, NC 28299-5507
PO BOX 5508, CHARLOTTE, NC 28299-5508
PO BOX 5509, CHARLOTTE, NC 28299-5509
PO BOX 5510, CHARLOTTE, NC 28299-5510
PO BOX 5511, CHARLOTTE, NC 28299-5511
PO BOX 5512, CHARLOTTE, NC 28299-5512
PO BOX 5513, CHARLOTTE, NC 28299-5513
PO BOX 5514, CHARLOTTE, NC 28299-5514
PO BOX 5515, CHARLOTTE, NC 28299-5515
PO BOX 5516, CHARLOTTE, NC 28299-5516
PO BOX 5517, CHARLOTTE, NC 28299-5517
PO BOX 5518, CHARLOTTE, NC 28299-5518
PO BOX 5519, CHARLOTTE, NC 28299-5519
PO BOX 5520, CHARLOTTE, NC 28299-5520
PO BOX 5521, CHARLOTTE, NC 28299-5521
PO BOX 5522, CHARLOTTE, NC 28299-5522
PO BOX 5523, CHARLOTTE, NC 28299-5523
PO BOX 5524, CHARLOTTE, NC 28299-5524
PO BOX 5525, CHARLOTTE, NC 28299-5525
PO BOX 5526, CHARLOTTE, NC 28299-5526
PO BOX 5527, CHARLOTTE, NC 28299-5527
PO BOX 5528, CHARLOTTE, NC 28299-5528
PO BOX 5529, CHARLOTTE, NC 28299-5529
PO BOX 5530, CHARLOTTE, NC 28299-5530
PO BOX 5531, CHARLOTTE, NC 28299-5531
PO BOX 5532, CHARLOTTE, NC 28299-5532
PO BOX 5533, CHARLOTTE, NC 28299-5533
PO BOX 5534, CHARLOTTE, NC 28299-5534
PO BOX 5535, CHARLOTTE, NC 28299-5535
PO BOX 5536, CHARLOTTE, NC 28299-5536
PO BOX 5537, CHARLOTTE, NC 28299-5537
PO BOX 5538, CHARLOTTE, NC 28299-5538
PO BOX 5539, CHARLOTTE, NC 28299-5539
PO BOX 5540, CHARLOTTE, NC 28299-5540
PO BOX 5541, CHARLOTTE, NC 28299-5541
PO BOX 5542, CHARLOTTE, NC 28299-5542
PO BOX 5543, CHARLOTTE, NC 28299-5543
PO BOX 5544, CHARLOTTE, NC 28299-5544
PO BOX 5545, CHARLOTTE, NC 28299-5545
PO BOX 5546, CHARLOTTE, NC 28299-5546
PO BOX 5547, CHARLOTTE, NC 28299-5547
PO BOX 5548, CHARLOTTE, NC 28299-5548
PO BOX 5549, CHARLOTTE, NC 28299-5549
PO BOX 5550, CHARLOTTE, NC 28299-5550
PO BOX 5551, CHARLOTTE, NC 28299-5551
PO BOX 5552, CHARLOTTE, NC 28299-5552
PO BOX 5553, CHARLOTTE, NC 28299-5553
PO BOX 5554, CHARLOTTE, NC 28299-5554
PO BOX 5555, CHARLOTTE, NC 28299-5555
PO BOX 5556, CHARLOTTE, NC 28299-5556
PO BOX 5557, CHARLOTTE, NC 28299-5557
PO BOX 5558, CHARLOTTE, NC 28299-5558
PO BOX 5559, CHARLOTTE, NC 28299-5559
PO BOX 5560, CHARLOTTE, NC 28299-5560
PO BOX 5561, CHARLOTTE, NC 28299-5561
PO BOX 5562, CHARLOTTE, NC 28299-5562
PO BOX 5563, CHARLOTTE, NC 28299-5563
PO BOX 5564, CHARLOTTE, NC 28299-5564
PO BOX 5565, CHARLOTTE, NC 28299-5565
PO BOX 5566, CHARLOTTE, NC 28299-5566
PO BOX 5567, CHARLOTTE, NC 28299-5567
PO BOX 5568, CHARLOTTE, NC 28299-5568
PO BOX 5569, CHARLOTTE, NC 28299-5569
PO BOX 5570, CHARLOTTE, NC 28299-5570
PO BOX 5571, CHARLOTTE, NC 28299-5571
PO BOX 5572, CHARLOTTE, NC 28299-5572
PO BOX 5573, CHARLOTTE, NC 28299-5573
PO BOX 5574, CHARLOTTE, NC 28299-5574
PO BOX 5575, CHARLOTTE, NC 28299-5575
PO BOX 5576, CHARLOTTE, NC 28299-5576
PO BOX 5577, CHARLOTTE, NC 28299-5577
PO BOX 5578, CHARLOTTE, NC 28299-5578
PO BOX 5579, CHARLOTTE, NC 28299-5579
PO BOX 5580, CHARLOTTE, NC 28299-5580
PO BOX 5581, CHARLOTTE, NC 28299-5581
PO BOX 5582, CHARLOTTE, NC 28299-5582
PO BOX 5583, CHARLOTTE, NC 28299-5583
PO BOX 5584, CHARLOTTE, NC 28299-5584
PO BOX 5585, CHARLOTTE, NC 28299-5585
PO BOX 5586, CHARLOTTE, NC 28299-5586
PO BOX 5587, CHARLOTTE, NC 28299-5587
PO BOX 5588, CHARLOTTE, NC 28299-5588
PO BOX 5589, CHARLOTTE, NC 28299-5589
PO BOX 5590, CHARLOTTE, NC 28299-5590
PO BOX 5591, CHARLOTTE, NC 28299-5591
PO BOX 5592, CHARLOTTE, NC 28299-5592
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