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 321, RICHFIELD SPRINGS, NY 13439-0321
PO BOX 322, RICHFIELD SPRINGS, NY 13439-0322
PO BOX 323, RICHFIELD SPRINGS, NY 13439-0323
PO BOX 324, RICHFIELD SPRINGS, NY 13439-0324
PO BOX 325, RICHFIELD SPRINGS, NY 13439-0325
PO BOX 326, RICHFIELD SPRINGS, NY 13439-0326
PO BOX 327, RICHFIELD SPRINGS, NY 13439-0327
PO BOX 328, RICHFIELD SPRINGS, NY 13439-0328
PO BOX 329, RICHFIELD SPRINGS, NY 13439-0329
PO BOX 330, RICHFIELD SPRINGS, NY 13439-0330
PO BOX 331, RICHFIELD SPRINGS, NY 13439-0331
PO BOX 332, RICHFIELD SPRINGS, NY 13439-0332
PO BOX 333, RICHFIELD SPRINGS, NY 13439-0333
PO BOX 334, RICHFIELD SPRINGS, NY 13439-0334
PO BOX 335, RICHFIELD SPRINGS, NY 13439-0335
PO BOX 336, RICHFIELD SPRINGS, NY 13439-0336
PO BOX 337, RICHFIELD SPRINGS, NY 13439-0337
PO BOX 338, RICHFIELD SPRINGS, NY 13439-0338
PO BOX 339, RICHFIELD SPRINGS, NY 13439-0339
PO BOX 340, RICHFIELD SPRINGS, NY 13439-0340
PO BOX 341, RICHFIELD SPRINGS, NY 13439-0341
PO BOX 342, RICHFIELD SPRINGS, NY 13439-0342
PO BOX 343, RICHFIELD SPRINGS, NY 13439-0343
PO BOX 344, RICHFIELD SPRINGS, NY 13439-0344
PO BOX 345, RICHFIELD SPRINGS, NY 13439-0345
PO BOX 346, RICHFIELD SPRINGS, NY 13439-0346
PO BOX 347, RICHFIELD SPRINGS, NY 13439-0347
PO BOX 348, RICHFIELD SPRINGS, NY 13439-0348
PO BOX 349, RICHFIELD SPRINGS, NY 13439-0349
PO BOX 350, RICHFIELD SPRINGS, NY 13439-0350
PO BOX 351, RICHFIELD SPRINGS, NY 13439-0351
PO BOX 352, RICHFIELD SPRINGS, NY 13439-0352
PO BOX 353, RICHFIELD SPRINGS, NY 13439-0353
PO BOX 354, RICHFIELD SPRINGS, NY 13439-0354
PO BOX 355, RICHFIELD SPRINGS, NY 13439-0355
PO BOX 356, RICHFIELD SPRINGS, NY 13439-0356
PO BOX 357, RICHFIELD SPRINGS, NY 13439-0357
PO BOX 358, RICHFIELD SPRINGS, NY 13439-0358
PO BOX 359, RICHFIELD SPRINGS, NY 13439-0359
PO BOX 360, RICHFIELD SPRINGS, NY 13439-0360
PO BOX 361, RICHFIELD SPRINGS, NY 13439-0361
PO BOX 362, RICHFIELD SPRINGS, NY 13439-0362
PO BOX 363, RICHFIELD SPRINGS, NY 13439-0363
PO BOX 364, RICHFIELD SPRINGS, NY 13439-0364
PO BOX 365, RICHFIELD SPRINGS, NY 13439-0365
PO BOX 366, RICHFIELD SPRINGS, NY 13439-0366
PO BOX 367, RICHFIELD SPRINGS, NY 13439-0367
PO BOX 368, RICHFIELD SPRINGS, NY 13439-0368
PO BOX 369, RICHFIELD SPRINGS, NY 13439-0369
PO BOX 370, RICHFIELD SPRINGS, NY 13439-0370
PO BOX 371, RICHFIELD SPRINGS, NY 13439-0371
PO BOX 372, RICHFIELD SPRINGS, NY 13439-0372
PO BOX 373, RICHFIELD SPRINGS, NY 13439-0373
PO BOX 374, RICHFIELD SPRINGS, NY 13439-0374
PO BOX 375, RICHFIELD SPRINGS, NY 13439-0375
PO BOX 376, RICHFIELD SPRINGS, NY 13439-0376
PO BOX 377, RICHFIELD SPRINGS, NY 13439-0377
PO BOX 378, RICHFIELD SPRINGS, NY 13439-0378
PO BOX 379, RICHFIELD SPRINGS, NY 13439-0379
PO BOX 380, RICHFIELD SPRINGS, NY 13439-0380
PO BOX 381, RICHFIELD SPRINGS, NY 13439-0381
PO BOX 382, RICHFIELD SPRINGS, NY 13439-0382
PO BOX 383, RICHFIELD SPRINGS, NY 13439-0383
PO BOX 384, RICHFIELD SPRINGS, NY 13439-0384
PO BOX 385, RICHFIELD SPRINGS, NY 13439-0385
PO BOX 386, RICHFIELD SPRINGS, NY 13439-0386
PO BOX 387, RICHFIELD SPRINGS, NY 13439-0387
PO BOX 388, RICHFIELD SPRINGS, NY 13439-0388
PO BOX 389, RICHFIELD SPRINGS, NY 13439-0389
PO BOX 390, RICHFIELD SPRINGS, NY 13439-0390
PO BOX 391, RICHFIELD SPRINGS, NY 13439-0391
PO BOX 392, RICHFIELD SPRINGS, NY 13439-0392
PO BOX 393, RICHFIELD SPRINGS, NY 13439-0393
PO BOX 394, RICHFIELD SPRINGS, NY 13439-0394
PO BOX 395, RICHFIELD SPRINGS, NY 13439-0395
PO BOX 396, RICHFIELD SPRINGS, NY 13439-0396
PO BOX 397, RICHFIELD SPRINGS, NY 13439-0397
PO BOX 398, RICHFIELD SPRINGS, NY 13439-0398
PO BOX 399, RICHFIELD SPRINGS, NY 13439-0399
PO BOX 400, RICHFIELD SPRINGS, NY 13439-0400
PO BOX 401, RICHFIELD SPRINGS, NY 13439-0401
PO BOX 402, RICHFIELD SPRINGS, NY 13439-0402
PO BOX 403, RICHFIELD SPRINGS, NY 13439-0403
PO BOX 404, RICHFIELD SPRINGS, NY 13439-0404
PO BOX 405, RICHFIELD SPRINGS, NY 13439-0405
PO BOX 406, RICHFIELD SPRINGS, NY 13439-0406
PO BOX 407, RICHFIELD SPRINGS, NY 13439-0407
PO BOX 408, RICHFIELD SPRINGS, NY 13439-0408
PO BOX 409, RICHFIELD SPRINGS, NY 13439-0409
PO BOX 410, RICHFIELD SPRINGS, NY 13439-0410
PO BOX 411, RICHFIELD SPRINGS, NY 13439-0411
PO BOX 412, RICHFIELD SPRINGS, NY 13439-0412
PO BOX 413, RICHFIELD SPRINGS, NY 13439-0413
PO BOX 414, RICHFIELD SPRINGS, NY 13439-0414
PO BOX 415, RICHFIELD SPRINGS, NY 13439-0415
PO BOX 416, RICHFIELD SPRINGS, NY 13439-0416
PO BOX 417, RICHFIELD SPRINGS, NY 13439-0417
PO BOX 418, RICHFIELD SPRINGS, NY 13439-0418
PO BOX 419, RICHFIELD SPRINGS, NY 13439-0419
PO BOX 420, RICHFIELD SPRINGS, NY 13439-0420
PO BOX 421, RICHFIELD SPRINGS, NY 13439-0421
PO BOX 422, RICHFIELD SPRINGS, NY 13439-0422
PO BOX 423, RICHFIELD SPRINGS, NY 13439-0423
PO BOX 424, RICHFIELD SPRINGS, NY 13439-0424
PO BOX 425, RICHFIELD SPRINGS, NY 13439-0425
PO BOX 426, RICHFIELD SPRINGS, NY 13439-0426
PO BOX 427, RICHFIELD SPRINGS, NY 13439-0427
PO BOX 428, RICHFIELD SPRINGS, NY 13439-0428
PO BOX 429, RICHFIELD SPRINGS, NY 13439-0429
PO BOX 430, RICHFIELD SPRINGS, NY 13439-0430
PO BOX 431, RICHFIELD SPRINGS, NY 13439-0431
PO BOX 432, RICHFIELD SPRINGS, NY 13439-0432
PO BOX 433, RICHFIELD SPRINGS, NY 13439-0433
PO BOX 434, RICHFIELD SPRINGS, NY 13439-0434
PO BOX 435, RICHFIELD SPRINGS, NY 13439-0435
PO BOX 436, RICHFIELD SPRINGS, NY 13439-0436
PO BOX 437, RICHFIELD SPRINGS, NY 13439-0437
PO BOX 438, RICHFIELD SPRINGS, NY 13439-0438
PO BOX 439, RICHFIELD SPRINGS, NY 13439-0439
PO BOX 440, RICHFIELD SPRINGS, NY 13439-0440
PO BOX 441, RICHFIELD SPRINGS, NY 13439-0441
PO BOX 442, RICHFIELD SPRINGS, NY 13439-0442
PO BOX 443, RICHFIELD SPRINGS, NY 13439-0443
PO BOX 444, RICHFIELD SPRINGS, NY 13439-0444
PO BOX 445, RICHFIELD SPRINGS, NY 13439-0445
PO BOX 446, RICHFIELD SPRINGS, NY 13439-0446
PO BOX 447, RICHFIELD SPRINGS, NY 13439-0447
PO BOX 448, RICHFIELD SPRINGS, NY 13439-0448
PO BOX 449, RICHFIELD SPRINGS, NY 13439-0449
PO BOX 450, RICHFIELD SPRINGS, NY 13439-0450
PO BOX 451, RICHFIELD SPRINGS, NY 13439-0451
PO BOX 452, RICHFIELD SPRINGS, NY 13439-0452
PO BOX 453, RICHFIELD SPRINGS, NY 13439-0453
PO BOX 454, RICHFIELD SPRINGS, NY 13439-0454
PO BOX 455, RICHFIELD SPRINGS, NY 13439-0455
PO BOX 456, RICHFIELD SPRINGS, NY 13439-0456
PO BOX 457, RICHFIELD SPRINGS, NY 13439-0457
PO BOX 458, RICHFIELD SPRINGS, NY 13439-0458
PO BOX 459, RICHFIELD SPRINGS, NY 13439-0459
PO BOX 460, RICHFIELD SPRINGS, NY 13439-0460
PO BOX 461, RICHFIELD SPRINGS, NY 13439-0461
PO BOX 462, RICHFIELD SPRINGS, NY 13439-0462
PO BOX 463, RICHFIELD SPRINGS, NY 13439-0463
PO BOX 464, RICHFIELD SPRINGS, NY 13439-0464
PO BOX 465, RICHFIELD SPRINGS, NY 13439-0465
PO BOX 466, RICHFIELD SPRINGS, NY 13439-0466
PO BOX 467, RICHFIELD SPRINGS, NY 13439-0467
PO BOX 468, RICHFIELD SPRINGS, NY 13439-0468
PO BOX 469, RICHFIELD SPRINGS, NY 13439-0469
PO BOX 470, RICHFIELD SPRINGS, NY 13439-0470
PO BOX 471, RICHFIELD SPRINGS, NY 13439-0471
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