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 361, ALTOONA, PA 16603-0361
PO BOX 362, ALTOONA, PA 16603-0362
PO BOX 363, ALTOONA, PA 16603-0363
PO BOX 364, ALTOONA, PA 16603-0364
PO BOX 365, ALTOONA, PA 16603-0365
PO BOX 366, ALTOONA, PA 16603-0366
PO BOX 367, ALTOONA, PA 16603-0367
PO BOX 368, ALTOONA, PA 16603-0368
PO BOX 369, ALTOONA, PA 16603-0369
PO BOX 370, ALTOONA, PA 16603-0370
PO BOX 371, ALTOONA, PA 16603-0371
PO BOX 372, ALTOONA, PA 16603-0372
PO BOX 373, ALTOONA, PA 16603-0373
PO BOX 374, ALTOONA, PA 16603-0374
PO BOX 375, ALTOONA, PA 16603-0375
PO BOX 376, ALTOONA, PA 16603-0376
PO BOX 377, ALTOONA, PA 16603-0377
PO BOX 378, ALTOONA, PA 16603-0378
PO BOX 379, ALTOONA, PA 16603-0379
PO BOX 380, ALTOONA, PA 16603-0380
PO BOX 381, ALTOONA, PA 16603-0381
PO BOX 382, ALTOONA, PA 16603-0382
PO BOX 383, ALTOONA, PA 16603-0383
PO BOX 384, ALTOONA, PA 16603-0384
PO BOX 385, ALTOONA, PA 16603-0385
PO BOX 386, ALTOONA, PA 16603-0386
PO BOX 387, ALTOONA, PA 16603-0387
PO BOX 388, ALTOONA, PA 16603-0388
PO BOX 389, ALTOONA, PA 16603-0389
PO BOX 390, ALTOONA, PA 16603-0390
PO BOX 391, ALTOONA, PA 16603-0391
PO BOX 392, ALTOONA, PA 16603-0392
PO BOX 393, ALTOONA, PA 16603-0393
PO BOX 394, ALTOONA, PA 16603-0394
PO BOX 395, ALTOONA, PA 16603-0395
PO BOX 396, ALTOONA, PA 16603-0396
PO BOX 397, ALTOONA, PA 16603-0397
PO BOX 398, ALTOONA, PA 16603-0398
PO BOX 399, ALTOONA, PA 16603-0399
PO BOX 400, ALTOONA, PA 16603-0400
PO BOX 401, ALTOONA, PA 16603-0401
PO BOX 402, ALTOONA, PA 16603-0402
PO BOX 403, ALTOONA, PA 16603-0403
PO BOX 404, ALTOONA, PA 16603-0404
PO BOX 405, ALTOONA, PA 16603-0405
PO BOX 406, ALTOONA, PA 16603-0406
PO BOX 407, ALTOONA, PA 16603-0407
PO BOX 408, ALTOONA, PA 16603-0408
PO BOX 409, ALTOONA, PA 16603-0409
PO BOX 410, ALTOONA, PA 16603-0410
PO BOX 411, ALTOONA, PA 16603-0411
PO BOX 412, ALTOONA, PA 16603-0412
PO BOX 413, ALTOONA, PA 16603-0413
PO BOX 414, ALTOONA, PA 16603-0414
PO BOX 415, ALTOONA, PA 16603-0415
PO BOX 416, ALTOONA, PA 16603-0416
PO BOX 417, ALTOONA, PA 16603-0417
PO BOX 418, ALTOONA, PA 16603-0418
PO BOX 419, ALTOONA, PA 16603-0419
PO BOX 420, ALTOONA, PA 16603-0420
PO BOX 421, ALTOONA, PA 16603-0421
PO BOX 422, ALTOONA, PA 16603-0422
PO BOX 423, ALTOONA, PA 16603-0423
PO BOX 424, ALTOONA, PA 16603-0424
PO BOX 425, ALTOONA, PA 16603-0425
PO BOX 426, ALTOONA, PA 16603-0426
PO BOX 427, ALTOONA, PA 16603-0427
PO BOX 428, ALTOONA, PA 16603-0428
PO BOX 429, ALTOONA, PA 16603-0429
PO BOX 430, ALTOONA, PA 16603-0430
PO BOX 431, ALTOONA, PA 16603-0431
PO BOX 432, ALTOONA, PA 16603-0432
PO BOX 433, ALTOONA, PA 16603-0433
PO BOX 434, ALTOONA, PA 16603-0434
PO BOX 435, ALTOONA, PA 16603-0435
PO BOX 436, ALTOONA, PA 16603-0436
PO BOX 437, ALTOONA, PA 16603-0437
PO BOX 438, ALTOONA, PA 16603-0438
PO BOX 439, ALTOONA, PA 16603-0439
PO BOX 440, ALTOONA, PA 16603-0440
PO BOX 441, ALTOONA, PA 16603-0441
PO BOX 442, ALTOONA, PA 16603-0442
PO BOX 443, ALTOONA, PA 16603-0443
PO BOX 444, ALTOONA, PA 16603-0444
PO BOX 445, ALTOONA, PA 16603-0445
PO BOX 446, ALTOONA, PA 16603-0446
PO BOX 447, ALTOONA, PA 16603-0447
PO BOX 448, ALTOONA, PA 16603-0448
PO BOX 449, ALTOONA, PA 16603-0449
PO BOX 450, ALTOONA, PA 16603-0450
PO BOX 451, ALTOONA, PA 16603-0451
PO BOX 452, ALTOONA, PA 16603-0452
PO BOX 453, ALTOONA, PA 16603-0453
PO BOX 454, ALTOONA, PA 16603-0454
PO BOX 455, ALTOONA, PA 16603-0455
PO BOX 456, ALTOONA, PA 16603-0456
PO BOX 457, ALTOONA, PA 16603-0457
PO BOX 458, ALTOONA, PA 16603-0458
PO BOX 459, ALTOONA, PA 16603-0459
PO BOX 460, ALTOONA, PA 16603-0460
PO BOX 461, ALTOONA, PA 16603-0461
PO BOX 462, ALTOONA, PA 16603-0462
PO BOX 463, ALTOONA, PA 16603-0463
PO BOX 464, ALTOONA, PA 16603-0464
PO BOX 465, ALTOONA, PA 16603-0465
PO BOX 466, ALTOONA, PA 16603-0466
PO BOX 467, ALTOONA, PA 16603-0467
PO BOX 468, ALTOONA, PA 16603-0468
PO BOX 469, ALTOONA, PA 16603-0469
PO BOX 470, ALTOONA, PA 16603-0470
PO BOX 471, ALTOONA, PA 16603-0471
PO BOX 472, ALTOONA, PA 16603-0472
PO BOX 473, ALTOONA, PA 16603-0473
PO BOX 474, ALTOONA, PA 16603-0474
PO BOX 475, ALTOONA, PA 16603-0475
PO BOX 476, ALTOONA, PA 16603-0476
PO BOX 477, ALTOONA, PA 16603-0477
PO BOX 478, ALTOONA, PA 16603-0478
PO BOX 479, ALTOONA, PA 16603-0479
PO BOX 480, ALTOONA, PA 16603-0480
PO BOX 481, ALTOONA, PA 16603-0481
PO BOX 482, ALTOONA, PA 16603-0482
PO BOX 483, ALTOONA, PA 16603-0483
PO BOX 484, ALTOONA, PA 16603-0484
PO BOX 485, ALTOONA, PA 16603-0485
PO BOX 486, ALTOONA, PA 16603-0486
PO BOX 487, ALTOONA, PA 16603-0487
PO BOX 488, ALTOONA, PA 16603-0488
PO BOX 489, ALTOONA, PA 16603-0489
PO BOX 490, ALTOONA, PA 16603-0490
PO BOX 491, ALTOONA, PA 16603-0491
PO BOX 492, ALTOONA, PA 16603-0492
PO BOX 493, ALTOONA, PA 16603-0493
PO BOX 494, ALTOONA, PA 16603-0494
PO BOX 495, ALTOONA, PA 16603-0495
PO BOX 496, ALTOONA, PA 16603-0496
PO BOX 497, ALTOONA, PA 16603-0497
PO BOX 498, ALTOONA, PA 16603-0498
PO BOX 499, ALTOONA, PA 16603-0499
PO BOX 500, ALTOONA, PA 16603-0500
PO BOX 501, ALTOONA, PA 16603-0501
PO BOX 502, ALTOONA, PA 16603-0502
PO BOX 503, ALTOONA, PA 16603-0503
PO BOX 504, ALTOONA, PA 16603-0504
PO BOX 505, ALTOONA, PA 16603-0505
PO BOX 506, ALTOONA, PA 16603-0506
PO BOX 507, ALTOONA, PA 16603-0507
PO BOX 508, ALTOONA, PA 16603-0508
PO BOX 509, ALTOONA, PA 16603-0509
PO BOX 510, ALTOONA, PA 16603-0510
PO BOX 511, ALTOONA, PA 16603-0511
PO BOX 512, ALTOONA, PA 16603-0512
PO BOX 513, ALTOONA, PA 16603-0513
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