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, FREDERICKSBURG, VA 22404-0361
PO BOX 362, FREDERICKSBURG, VA 22404-0362
PO BOX 363, FREDERICKSBURG, VA 22404-0363
PO BOX 364, FREDERICKSBURG, VA 22404-0364
PO BOX 365, FREDERICKSBURG, VA 22404-0365
PO BOX 366, FREDERICKSBURG, VA 22404-0366
PO BOX 367, FREDERICKSBURG, VA 22404-0367
PO BOX 368, FREDERICKSBURG, VA 22404-0368
PO BOX 369, FREDERICKSBURG, VA 22404-0369
PO BOX 370, FREDERICKSBURG, VA 22404-0370
PO BOX 371, FREDERICKSBURG, VA 22404-0371
PO BOX 372, FREDERICKSBURG, VA 22404-0372
PO BOX 373, FREDERICKSBURG, VA 22404-0373
PO BOX 374, FREDERICKSBURG, VA 22404-0374
PO BOX 375, FREDERICKSBURG, VA 22404-0375
PO BOX 376, FREDERICKSBURG, VA 22404-0376
PO BOX 377, FREDERICKSBURG, VA 22404-0377
PO BOX 378, FREDERICKSBURG, VA 22404-0378
PO BOX 379, FREDERICKSBURG, VA 22404-0379
PO BOX 380, FREDERICKSBURG, VA 22404-0380
PO BOX 381, FREDERICKSBURG, VA 22404-0381
PO BOX 382, FREDERICKSBURG, VA 22404-0382
PO BOX 383, FREDERICKSBURG, VA 22404-0383
PO BOX 384, FREDERICKSBURG, VA 22404-0384
PO BOX 385, FREDERICKSBURG, VA 22404-0385
PO BOX 386, FREDERICKSBURG, VA 22404-0386
PO BOX 387, FREDERICKSBURG, VA 22404-0387
PO BOX 388, FREDERICKSBURG, VA 22404-0388
PO BOX 389, FREDERICKSBURG, VA 22404-0389
PO BOX 390, FREDERICKSBURG, VA 22404-0390
PO BOX 391, FREDERICKSBURG, VA 22404-0391
PO BOX 392, FREDERICKSBURG, VA 22404-0392
PO BOX 393, FREDERICKSBURG, VA 22404-0393
PO BOX 394, FREDERICKSBURG, VA 22404-0394
PO BOX 395, FREDERICKSBURG, VA 22404-0395
PO BOX 396, FREDERICKSBURG, VA 22404-0396
PO BOX 397, FREDERICKSBURG, VA 22404-0397
PO BOX 398, FREDERICKSBURG, VA 22404-0398
PO BOX 399, FREDERICKSBURG, VA 22404-0399
PO BOX 400, FREDERICKSBURG, VA 22404-0400
PO BOX 401, FREDERICKSBURG, VA 22404-0401
PO BOX 402, FREDERICKSBURG, VA 22404-0402
PO BOX 403, FREDERICKSBURG, VA 22404-0403
PO BOX 404, FREDERICKSBURG, VA 22404-0404
PO BOX 405, FREDERICKSBURG, VA 22404-0405
PO BOX 406, FREDERICKSBURG, VA 22404-0406
PO BOX 407, FREDERICKSBURG, VA 22404-0407
PO BOX 408, FREDERICKSBURG, VA 22404-0408
PO BOX 409, FREDERICKSBURG, VA 22404-0409
PO BOX 410, FREDERICKSBURG, VA 22404-0410
PO BOX 411, FREDERICKSBURG, VA 22404-0411
PO BOX 412, FREDERICKSBURG, VA 22404-0412
PO BOX 413, FREDERICKSBURG, VA 22404-0413
PO BOX 414, FREDERICKSBURG, VA 22404-0414
PO BOX 415, FREDERICKSBURG, VA 22404-0415
PO BOX 416, FREDERICKSBURG, VA 22404-0416
PO BOX 417, FREDERICKSBURG, VA 22404-0417
PO BOX 418, FREDERICKSBURG, VA 22404-0418
PO BOX 419, FREDERICKSBURG, VA 22404-0419
PO BOX 420, FREDERICKSBURG, VA 22404-0420
PO BOX 421, FREDERICKSBURG, VA 22404-0421
PO BOX 422, FREDERICKSBURG, VA 22404-0422
PO BOX 423, FREDERICKSBURG, VA 22404-0423
PO BOX 424, FREDERICKSBURG, VA 22404-0424
PO BOX 425, FREDERICKSBURG, VA 22404-0425
PO BOX 426, FREDERICKSBURG, VA 22404-0426
PO BOX 427, FREDERICKSBURG, VA 22404-0427
PO BOX 428, FREDERICKSBURG, VA 22404-0428
PO BOX 429, FREDERICKSBURG, VA 22404-0429
PO BOX 430, FREDERICKSBURG, VA 22404-0430
PO BOX 431, FREDERICKSBURG, VA 22404-0431
PO BOX 432, FREDERICKSBURG, VA 22404-0432
PO BOX 433, FREDERICKSBURG, VA 22404-0433
PO BOX 434, FREDERICKSBURG, VA 22404-0434
PO BOX 435, FREDERICKSBURG, VA 22404-0435
PO BOX 436, FREDERICKSBURG, VA 22404-0436
PO BOX 437, FREDERICKSBURG, VA 22404-0437
PO BOX 438, FREDERICKSBURG, VA 22404-0438
PO BOX 439, FREDERICKSBURG, VA 22404-0439
PO BOX 440, FREDERICKSBURG, VA 22404-0440
PO BOX 441, FREDERICKSBURG, VA 22404-0441
PO BOX 442, FREDERICKSBURG, VA 22404-0442
PO BOX 443, FREDERICKSBURG, VA 22404-0443
PO BOX 444, FREDERICKSBURG, VA 22404-0444
PO BOX 445, FREDERICKSBURG, VA 22404-0445
PO BOX 446, FREDERICKSBURG, VA 22404-0446
PO BOX 447, FREDERICKSBURG, VA 22404-0447
PO BOX 448, FREDERICKSBURG, VA 22404-0448
PO BOX 449, FREDERICKSBURG, VA 22404-0449
PO BOX 450, FREDERICKSBURG, VA 22404-0450
PO BOX 451, FREDERICKSBURG, VA 22404-0451
PO BOX 452, FREDERICKSBURG, VA 22404-0452
PO BOX 453, FREDERICKSBURG, VA 22404-0453
PO BOX 454, FREDERICKSBURG, VA 22404-0454
PO BOX 455, FREDERICKSBURG, VA 22404-0455
PO BOX 456, FREDERICKSBURG, VA 22404-0456
PO BOX 457, FREDERICKSBURG, VA 22404-0457
PO BOX 458, FREDERICKSBURG, VA 22404-0458
PO BOX 459, FREDERICKSBURG, VA 22404-0459
PO BOX 460, FREDERICKSBURG, VA 22404-0460
PO BOX 461, FREDERICKSBURG, VA 22404-0461
PO BOX 462, FREDERICKSBURG, VA 22404-0462
PO BOX 463, FREDERICKSBURG, VA 22404-0463
PO BOX 464, FREDERICKSBURG, VA 22404-0464
PO BOX 465, FREDERICKSBURG, VA 22404-0465
PO BOX 466, FREDERICKSBURG, VA 22404-0466
PO BOX 467, FREDERICKSBURG, VA 22404-0467
PO BOX 468, FREDERICKSBURG, VA 22404-0468
PO BOX 469, FREDERICKSBURG, VA 22404-0469
PO BOX 470, FREDERICKSBURG, VA 22404-0470
PO BOX 471, FREDERICKSBURG, VA 22404-0471
PO BOX 472, FREDERICKSBURG, VA 22404-0472
PO BOX 473, FREDERICKSBURG, VA 22404-0473
PO BOX 474, FREDERICKSBURG, VA 22404-0474
PO BOX 475, FREDERICKSBURG, VA 22404-0475
PO BOX 476, FREDERICKSBURG, VA 22404-0476
PO BOX 477, FREDERICKSBURG, VA 22404-0477
PO BOX 478, FREDERICKSBURG, VA 22404-0478
PO BOX 479, FREDERICKSBURG, VA 22404-0479
PO BOX 480, FREDERICKSBURG, VA 22404-0480
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