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 287, JEFFERSON, PA 15344-0287
PO BOX 288, JEFFERSON, PA 15344-0288
PO BOX 289, JEFFERSON, PA 15344-0289
PO BOX 290, JEFFERSON, PA 15344-0290
PO BOX 291, JEFFERSON, PA 15344-0291
PO BOX 292, JEFFERSON, PA 15344-0292
PO BOX 293, JEFFERSON, PA 15344-0293
PO BOX 294, JEFFERSON, PA 15344-0294
PO BOX 295, JEFFERSON, PA 15344-0295
PO BOX 296, JEFFERSON, PA 15344-0296
PO BOX 297, JEFFERSON, PA 15344-0297
PO BOX 298, JEFFERSON, PA 15344-0298
PO BOX 299, JEFFERSON, PA 15344-0299
PO BOX 300, JEFFERSON, PA 15344-0300
PO BOX 301, JEFFERSON, PA 15344-0301
PO BOX 302, JEFFERSON, PA 15344-0302
PO BOX 303, JEFFERSON, PA 15344-0303
PO BOX 304, JEFFERSON, PA 15344-0304
PO BOX 305, JEFFERSON, PA 15344-0305
PO BOX 306, JEFFERSON, PA 15344-0306
PO BOX 307, JEFFERSON, PA 15344-0307
PO BOX 308, JEFFERSON, PA 15344-0308
PO BOX 309, JEFFERSON, PA 15344-0309
PO BOX 310, JEFFERSON, PA 15344-0310
PO BOX 311, JEFFERSON, PA 15344-0311
PO BOX 312, JEFFERSON, PA 15344-0312
PO BOX 313, JEFFERSON, PA 15344-0313
PO BOX 314, JEFFERSON, PA 15344-0314
PO BOX 315, JEFFERSON, PA 15344-0315
PO BOX 316, JEFFERSON, PA 15344-0316
PO BOX 317, JEFFERSON, PA 15344-0317
PO BOX 318, JEFFERSON, PA 15344-0318
PO BOX 319, JEFFERSON, PA 15344-0319
PO BOX 320, JEFFERSON, PA 15344-0320
PO BOX 321, JEFFERSON, PA 15344-0321
PO BOX 322, JEFFERSON, PA 15344-0322
PO BOX 323, JEFFERSON, PA 15344-0323
PO BOX 324, JEFFERSON, PA 15344-0324
PO BOX 325, JEFFERSON, PA 15344-0325
PO BOX 326, JEFFERSON, PA 15344-0326
PO BOX 327, JEFFERSON, PA 15344-0327
PO BOX 328, JEFFERSON, PA 15344-0328
PO BOX 329, JEFFERSON, PA 15344-0329
PO BOX 330, JEFFERSON, PA 15344-0330
PO BOX 331, JEFFERSON, PA 15344-0331
PO BOX 332, JEFFERSON, PA 15344-0332
PO BOX 333, JEFFERSON, PA 15344-0333
PO BOX 334, JEFFERSON, PA 15344-0334
PO BOX 335, JEFFERSON, PA 15344-0335
PO BOX 336, JEFFERSON, PA 15344-0336
PO BOX 337, JEFFERSON, PA 15344-0337
PO BOX 338, JEFFERSON, PA 15344-0338
PO BOX 339, JEFFERSON, PA 15344-0339
PO BOX 340, JEFFERSON, PA 15344-0340
PO BOX 341, JEFFERSON, PA 15344-0341
PO BOX 342, JEFFERSON, PA 15344-0342
PO BOX 343, JEFFERSON, PA 15344-0343
PO BOX 344, JEFFERSON, PA 15344-0344
PO BOX 345, JEFFERSON, PA 15344-0345
PO BOX 346, JEFFERSON, PA 15344-0346
PO BOX 347, JEFFERSON, PA 15344-0347
PO BOX 348, JEFFERSON, PA 15344-0348
PO BOX 349, JEFFERSON, PA 15344-0349
PO BOX 350, JEFFERSON, PA 15344-0350
PO BOX 351, JEFFERSON, PA 15344-0351
PO BOX 352, JEFFERSON, PA 15344-0352
PO BOX 353, JEFFERSON, PA 15344-0353
PO BOX 354, JEFFERSON, PA 15344-0354
PO BOX 355, JEFFERSON, PA 15344-0355
PO BOX 356, JEFFERSON, PA 15344-0356
PO BOX 357, JEFFERSON, PA 15344-0357
PO BOX 358, JEFFERSON, PA 15344-0358
PO BOX 359, JEFFERSON, PA 15344-0359
PO BOX 360, JEFFERSON, PA 15344-0360
PO BOX 361, JEFFERSON, PA 15344-0361
PO BOX 362, JEFFERSON, PA 15344-0362
PO BOX 363, JEFFERSON, PA 15344-0363
PO BOX 364, JEFFERSON, PA 15344-0364
PO BOX 365, JEFFERSON, PA 15344-0365
PO BOX 366, JEFFERSON, PA 15344-0366
PO BOX 367, JEFFERSON, PA 15344-0367
PO BOX 368, JEFFERSON, PA 15344-0368
PO BOX 369, JEFFERSON, PA 15344-0369
PO BOX 370, JEFFERSON, PA 15344-0370
PO BOX 371, JEFFERSON, PA 15344-0371
PO BOX 372, JEFFERSON, PA 15344-0372
PO BOX 373, JEFFERSON, PA 15344-0373
PO BOX 374, JEFFERSON, PA 15344-0374
PO BOX 375, JEFFERSON, PA 15344-0375
PO BOX 376, JEFFERSON, PA 15344-0376
PO BOX 377, JEFFERSON, PA 15344-0377
PO BOX 378, JEFFERSON, PA 15344-0378
PO BOX 379, JEFFERSON, PA 15344-0379
PO BOX 380, JEFFERSON, PA 15344-0380
PO BOX 381, JEFFERSON, PA 15344-0381
PO BOX 382, JEFFERSON, PA 15344-0382
PO BOX 383, JEFFERSON, PA 15344-0383
PO BOX 384, JEFFERSON, PA 15344-0384
PO BOX 385, JEFFERSON, PA 15344-0385
PO BOX 386, JEFFERSON, PA 15344-0386
PO BOX 387, JEFFERSON, PA 15344-0387
PO BOX 388, JEFFERSON, PA 15344-0388
PO BOX 389, JEFFERSON, PA 15344-0389
PO BOX 390, JEFFERSON, PA 15344-0390
PO BOX 391, JEFFERSON, PA 15344-0391
PO BOX 392, JEFFERSON, PA 15344-0392
PO BOX 393, JEFFERSON, PA 15344-0393
PO BOX 394, JEFFERSON, PA 15344-0394
PO BOX 395, JEFFERSON, PA 15344-0395
PO BOX 396, JEFFERSON, PA 15344-0396
PO BOX 397, JEFFERSON, PA 15344-0397
PO BOX 398, JEFFERSON, PA 15344-0398
PO BOX 399, JEFFERSON, PA 15344-0399
PO BOX 400, JEFFERSON, PA 15344-0400
PO BOX 401, JEFFERSON, PA 15344-0401
PO BOX 402, JEFFERSON, PA 15344-0402
PO BOX 403, JEFFERSON, PA 15344-0403
PO BOX 404, JEFFERSON, PA 15344-0404
PO BOX 405, JEFFERSON, PA 15344-0405
PO BOX 406, JEFFERSON, PA 15344-0406
PO BOX 407, JEFFERSON, PA 15344-0407
PO BOX 408, JEFFERSON, PA 15344-0408
PO BOX 409, JEFFERSON, PA 15344-0409
PO BOX 410, JEFFERSON, PA 15344-0410
PO BOX 411, JEFFERSON, PA 15344-0411
PO BOX 412, JEFFERSON, PA 15344-0412
PO BOX 413, JEFFERSON, PA 15344-0413
PO BOX 414, JEFFERSON, PA 15344-0414
PO BOX 415, JEFFERSON, PA 15344-0415
PO BOX 416, JEFFERSON, PA 15344-0416
PO BOX 417, JEFFERSON, PA 15344-0417
PO BOX 418, JEFFERSON, PA 15344-0418
PO BOX 419, JEFFERSON, PA 15344-0419
PO BOX 420, JEFFERSON, PA 15344-0420
PO BOX 421, JEFFERSON, PA 15344-0421
PO BOX 422, JEFFERSON, PA 15344-0422
PO BOX 423, JEFFERSON, PA 15344-0423
PO BOX 424, JEFFERSON, PA 15344-0424
PO BOX 425, JEFFERSON, PA 15344-0425
PO BOX 426, JEFFERSON, PA 15344-0426
PO BOX 427, JEFFERSON, PA 15344-0427
PO BOX 428, JEFFERSON, PA 15344-0428
PO BOX 429, JEFFERSON, PA 15344-0429
PO BOX 430, JEFFERSON, PA 15344-0430
PO BOX 431, JEFFERSON, PA 15344-0431
PO BOX 432, JEFFERSON, PA 15344-0432
PO BOX 433, JEFFERSON, PA 15344-0433
PO BOX 434, JEFFERSON, PA 15344-0434
PO BOX 435, JEFFERSON, PA 15344-0435
PO BOX 436, JEFFERSON, PA 15344-0436
PO BOX 437, JEFFERSON, PA 15344-0437
PO BOX 438, JEFFERSON, PA 15344-0438
PO BOX 439, JEFFERSON, PA 15344-0439
PO BOX 440, JEFFERSON, PA 15344-0440
PO BOX 441, JEFFERSON, PA 15344-0441
PO BOX 442, JEFFERSON, PA 15344-0442
PO BOX 443, JEFFERSON, PA 15344-0443
PO BOX 444, JEFFERSON, PA 15344-0444
PO BOX 445, JEFFERSON, PA 15344-0445
PO BOX 446, JEFFERSON, PA 15344-0446
PO BOX 447, JEFFERSON, PA 15344-0447
PO BOX 448, JEFFERSON, PA 15344-0448
PO BOX 449, JEFFERSON, PA 15344-0449
PO BOX 450, JEFFERSON, PA 15344-0450
PO BOX 451, JEFFERSON, PA 15344-0451
PO BOX 452, JEFFERSON, PA 15344-0452
PO BOX 453, JEFFERSON, PA 15344-0453
PO BOX 454, JEFFERSON, PA 15344-0454
PO BOX 455, JEFFERSON, PA 15344-0455
PO BOX 456, JEFFERSON, PA 15344-0456
PO BOX 457, JEFFERSON, PA 15344-0457
PO BOX 458, JEFFERSON, PA 15344-0458
PO BOX 459, JEFFERSON, PA 15344-0459
PO BOX 460, JEFFERSON, PA 15344-0460
PO BOX 461, JEFFERSON, PA 15344-0461
PO BOX 462, JEFFERSON, PA 15344-0462
PO BOX 463, JEFFERSON, PA 15344-0463
PO BOX 464, JEFFERSON, PA 15344-0464
PO BOX 465, JEFFERSON, PA 15344-0465
PO BOX 466, JEFFERSON, PA 15344-0466
PO BOX 467, JEFFERSON, PA 15344-0467
PO BOX 468, JEFFERSON, PA 15344-0468
PO BOX 469, JEFFERSON, PA 15344-0469
PO BOX 470, JEFFERSON, PA 15344-0470
PO BOX 471, JEFFERSON, PA 15344-0471
PO BOX 472, JEFFERSON, PA 15344-0472
PO BOX 473, JEFFERSON, PA 15344-0473
PO BOX 474, JEFFERSON, PA 15344-0474
PO BOX 475, JEFFERSON, PA 15344-0475
PO BOX 476, JEFFERSON, PA 15344-0476
PO BOX 477, JEFFERSON, PA 15344-0477
PO BOX 478, JEFFERSON, PA 15344-0478
PO BOX 479, JEFFERSON, PA 15344-0479
PO BOX 480, JEFFERSON, PA 15344-0480
PO BOX 481, JEFFERSON, PA 15344-0481
PO BOX 482, JEFFERSON, PA 15344-0482
PO BOX 483, JEFFERSON, PA 15344-0483
PO BOX 484, JEFFERSON, PA 15344-0484
PO BOX 485, JEFFERSON, PA 15344-0485
PO BOX 486, JEFFERSON, PA 15344-0486
PO BOX 487, JEFFERSON, PA 15344-0487
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