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 47401, DISTRICT HEIGHTS, MD 20753-7401
PO BOX 47402, DISTRICT HEIGHTS, MD 20753-7402
PO BOX 47403, DISTRICT HEIGHTS, MD 20753-7403
PO BOX 47404, DISTRICT HEIGHTS, MD 20753-7404
PO BOX 47405, DISTRICT HEIGHTS, MD 20753-7405
PO BOX 47406, DISTRICT HEIGHTS, MD 20753-7406
PO BOX 47407, DISTRICT HEIGHTS, MD 20753-7407
PO BOX 47408, DISTRICT HEIGHTS, MD 20753-7408
PO BOX 47409, DISTRICT HEIGHTS, MD 20753-7409
PO BOX 47410, DISTRICT HEIGHTS, MD 20753-7410
PO BOX 47411, DISTRICT HEIGHTS, MD 20753-7411
PO BOX 47412, DISTRICT HEIGHTS, MD 20753-7412
PO BOX 47413, DISTRICT HEIGHTS, MD 20753-7413
PO BOX 47414, DISTRICT HEIGHTS, MD 20753-7414
PO BOX 47415, DISTRICT HEIGHTS, MD 20753-7415
PO BOX 47416, DISTRICT HEIGHTS, MD 20753-7416
PO BOX 47417, DISTRICT HEIGHTS, MD 20753-7417
PO BOX 47418, DISTRICT HEIGHTS, MD 20753-7418
PO BOX 47419, DISTRICT HEIGHTS, MD 20753-7419
PO BOX 47420, DISTRICT HEIGHTS, MD 20753-7420
PO BOX 47421, DISTRICT HEIGHTS, MD 20753-7421
PO BOX 47422, DISTRICT HEIGHTS, MD 20753-7422
PO BOX 47423, DISTRICT HEIGHTS, MD 20753-7423
PO BOX 47424, DISTRICT HEIGHTS, MD 20753-7424
PO BOX 47425, DISTRICT HEIGHTS, MD 20753-7425
PO BOX 47426, DISTRICT HEIGHTS, MD 20753-7426
PO BOX 47427, DISTRICT HEIGHTS, MD 20753-7427
PO BOX 47428, DISTRICT HEIGHTS, MD 20753-7428
PO BOX 47429, DISTRICT HEIGHTS, MD 20753-7429
PO BOX 47430, DISTRICT HEIGHTS, MD 20753-7430
PO BOX 47431, DISTRICT HEIGHTS, MD 20753-7431
PO BOX 47432, DISTRICT HEIGHTS, MD 20753-7432
PO BOX 47433, DISTRICT HEIGHTS, MD 20753-7433
PO BOX 47434, DISTRICT HEIGHTS, MD 20753-7434
PO BOX 47435, DISTRICT HEIGHTS, MD 20753-7435
PO BOX 47436, DISTRICT HEIGHTS, MD 20753-7436
PO BOX 47437, DISTRICT HEIGHTS, MD 20753-7437
PO BOX 47438, DISTRICT HEIGHTS, MD 20753-7438
PO BOX 47439, DISTRICT HEIGHTS, MD 20753-7439
PO BOX 47440, DISTRICT HEIGHTS, MD 20753-7440
PO BOX 47441, DISTRICT HEIGHTS, MD 20753-7441
PO BOX 47442, DISTRICT HEIGHTS, MD 20753-7442
PO BOX 47443, DISTRICT HEIGHTS, MD 20753-7443
PO BOX 47444, DISTRICT HEIGHTS, MD 20753-7444
PO BOX 47445, DISTRICT HEIGHTS, MD 20753-7445
PO BOX 47446, DISTRICT HEIGHTS, MD 20753-7446
PO BOX 47447, DISTRICT HEIGHTS, MD 20753-7447
PO BOX 47448, DISTRICT HEIGHTS, MD 20753-7448
PO BOX 47449, DISTRICT HEIGHTS, MD 20753-7449
PO BOX 47450, DISTRICT HEIGHTS, MD 20753-7450
PO BOX 47451, DISTRICT HEIGHTS, MD 20753-7451
PO BOX 47452, DISTRICT HEIGHTS, MD 20753-7452
PO BOX 47453, DISTRICT HEIGHTS, MD 20753-7453
PO BOX 47454, DISTRICT HEIGHTS, MD 20753-7454
PO BOX 47455, DISTRICT HEIGHTS, MD 20753-7455
PO BOX 47456, DISTRICT HEIGHTS, MD 20753-7456
PO BOX 47457, DISTRICT HEIGHTS, MD 20753-7457
PO BOX 47458, DISTRICT HEIGHTS, MD 20753-7458
PO BOX 47459, DISTRICT HEIGHTS, MD 20753-7459
PO BOX 47460, DISTRICT HEIGHTS, MD 20753-7460
PO BOX 47461, DISTRICT HEIGHTS, MD 20753-7461
PO BOX 47462, DISTRICT HEIGHTS, MD 20753-7462
PO BOX 47463, DISTRICT HEIGHTS, MD 20753-7463
PO BOX 47464, DISTRICT HEIGHTS, MD 20753-7464
PO BOX 47465, DISTRICT HEIGHTS, MD 20753-7465
PO BOX 47466, DISTRICT HEIGHTS, MD 20753-7466
PO BOX 47467, DISTRICT HEIGHTS, MD 20753-7467
PO BOX 47468, DISTRICT HEIGHTS, MD 20753-7468
PO BOX 47469, DISTRICT HEIGHTS, MD 20753-7469
PO BOX 47470, DISTRICT HEIGHTS, MD 20753-7470
PO BOX 47471, DISTRICT HEIGHTS, MD 20753-7471
PO BOX 47472, DISTRICT HEIGHTS, MD 20753-7472
PO BOX 47473, DISTRICT HEIGHTS, MD 20753-7473
PO BOX 47474, DISTRICT HEIGHTS, MD 20753-7474
PO BOX 47475, DISTRICT HEIGHTS, MD 20753-7475
PO BOX 47476, DISTRICT HEIGHTS, MD 20753-7476
PO BOX 47477, DISTRICT HEIGHTS, MD 20753-7477
PO BOX 47478, DISTRICT HEIGHTS, MD 20753-7478
PO BOX 47479, DISTRICT HEIGHTS, MD 20753-7479
PO BOX 47480, DISTRICT HEIGHTS, MD 20753-7480
PO BOX 47481, DISTRICT HEIGHTS, MD 20753-7481
PO BOX 47482, DISTRICT HEIGHTS, MD 20753-7482
PO BOX 47483, DISTRICT HEIGHTS, MD 20753-7483
PO BOX 47484, DISTRICT HEIGHTS, MD 20753-7484
PO BOX 47485, DISTRICT HEIGHTS, MD 20753-7485
PO BOX 47486, DISTRICT HEIGHTS, MD 20753-7486
PO BOX 47487, DISTRICT HEIGHTS, MD 20753-7487
PO BOX 47488, DISTRICT HEIGHTS, MD 20753-7488
PO BOX 47489, DISTRICT HEIGHTS, MD 20753-7489
PO BOX 47490, DISTRICT HEIGHTS, MD 20753-7490
PO BOX 47491, DISTRICT HEIGHTS, MD 20753-7491
PO BOX 47492, DISTRICT HEIGHTS, MD 20753-7492
PO BOX 47493, DISTRICT HEIGHTS, MD 20753-7493
PO BOX 47494, DISTRICT HEIGHTS, MD 20753-7494
PO BOX 47495, DISTRICT HEIGHTS, MD 20753-7495
PO BOX 47496, DISTRICT HEIGHTS, MD 20753-7496
PO BOX 47497, DISTRICT HEIGHTS, MD 20753-7497
PO BOX 47498, DISTRICT HEIGHTS, MD 20753-7498
PO BOX 47499, DISTRICT HEIGHTS, MD 20753-7499
PO BOX 47500, DISTRICT HEIGHTS, MD 20753-7500
PO BOX 47501, DISTRICT HEIGHTS, MD 20753-7501
PO BOX 47502, DISTRICT HEIGHTS, MD 20753-7502
PO BOX 47503, DISTRICT HEIGHTS, MD 20753-7503
PO BOX 47504, DISTRICT HEIGHTS, MD 20753-7504
PO BOX 47505, DISTRICT HEIGHTS, MD 20753-7505
PO BOX 47506, DISTRICT HEIGHTS, MD 20753-7506
PO BOX 47507, DISTRICT HEIGHTS, MD 20753-7507
PO BOX 47508, DISTRICT HEIGHTS, MD 20753-7508
PO BOX 47509, DISTRICT HEIGHTS, MD 20753-7509
PO BOX 47510, DISTRICT HEIGHTS, MD 20753-7510
PO BOX 47511, DISTRICT HEIGHTS, MD 20753-7511
PO BOX 47512, DISTRICT HEIGHTS, MD 20753-7512
PO BOX 47513, DISTRICT HEIGHTS, MD 20753-7513
PO BOX 47514, DISTRICT HEIGHTS, MD 20753-7514
PO BOX 47515, DISTRICT HEIGHTS, MD 20753-7515
PO BOX 47516, DISTRICT HEIGHTS, MD 20753-7516
PO BOX 47517, DISTRICT HEIGHTS, MD 20753-7517
PO BOX 47518, DISTRICT HEIGHTS, MD 20753-7518
PO BOX 47519, DISTRICT HEIGHTS, MD 20753-7519
PO BOX 47520, DISTRICT HEIGHTS, MD 20753-7520
PO BOX 47521, DISTRICT HEIGHTS, MD 20753-7521
PO BOX 47522, DISTRICT HEIGHTS, MD 20753-7522
PO BOX 47523, DISTRICT HEIGHTS, MD 20753-7523
PO BOX 47524, DISTRICT HEIGHTS, MD 20753-7524
PO BOX 47525, DISTRICT HEIGHTS, MD 20753-7525
PO BOX 47526, DISTRICT HEIGHTS, MD 20753-7526
PO BOX 47527, DISTRICT HEIGHTS, MD 20753-7527
PO BOX 47528, DISTRICT HEIGHTS, MD 20753-7528
PO BOX 47529, DISTRICT HEIGHTS, MD 20753-7529
PO BOX 47530, DISTRICT HEIGHTS, MD 20753-7530
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