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 241, JESUP, IA 50648-0241
PO BOX 242, JESUP, IA 50648-0242
PO BOX 243, JESUP, IA 50648-0243
PO BOX 244, JESUP, IA 50648-0244
PO BOX 245, JESUP, IA 50648-0245
PO BOX 246, JESUP, IA 50648-0246
PO BOX 247, JESUP, IA 50648-0247
PO BOX 248, JESUP, IA 50648-0248
PO BOX 249, JESUP, IA 50648-0249
PO BOX 250, JESUP, IA 50648-0250
PO BOX 251, JESUP, IA 50648-0251
PO BOX 252, JESUP, IA 50648-0252
PO BOX 253, JESUP, IA 50648-0253
PO BOX 254, JESUP, IA 50648-0254
PO BOX 255, JESUP, IA 50648-0255
PO BOX 256, JESUP, IA 50648-0256
PO BOX 257, JESUP, IA 50648-0257
PO BOX 258, JESUP, IA 50648-0258
PO BOX 259, JESUP, IA 50648-0259
PO BOX 260, JESUP, IA 50648-0260
PO BOX 261, JESUP, IA 50648-0261
PO BOX 262, JESUP, IA 50648-0262
PO BOX 263, JESUP, IA 50648-0263
PO BOX 264, JESUP, IA 50648-0264
PO BOX 265, JESUP, IA 50648-0265
PO BOX 266, JESUP, IA 50648-0266
PO BOX 267, JESUP, IA 50648-0267
PO BOX 268, JESUP, IA 50648-0268
PO BOX 269, JESUP, IA 50648-0269
PO BOX 270, JESUP, IA 50648-0270
PO BOX 271, JESUP, IA 50648-0271
PO BOX 272, JESUP, IA 50648-0272
PO BOX 273, JESUP, IA 50648-0273
PO BOX 274, JESUP, IA 50648-0274
PO BOX 275, JESUP, IA 50648-0275
PO BOX 276, JESUP, IA 50648-0276
PO BOX 277, JESUP, IA 50648-0277
PO BOX 278, JESUP, IA 50648-0278
PO BOX 279, JESUP, IA 50648-0279
PO BOX 280, JESUP, IA 50648-0280
PO BOX 281, JESUP, IA 50648-0281
PO BOX 282, JESUP, IA 50648-0282
PO BOX 283, JESUP, IA 50648-0283
PO BOX 284, JESUP, IA 50648-0284
PO BOX 285, JESUP, IA 50648-0285
PO BOX 286, JESUP, IA 50648-0286
PO BOX 287, JESUP, IA 50648-0287
PO BOX 288, JESUP, IA 50648-0288
PO BOX 289, JESUP, IA 50648-0289
PO BOX 290, JESUP, IA 50648-0290
PO BOX 291, JESUP, IA 50648-0291
PO BOX 292, JESUP, IA 50648-0292
PO BOX 293, JESUP, IA 50648-0293
PO BOX 294, JESUP, IA 50648-0294
PO BOX 295, JESUP, IA 50648-0295
PO BOX 296, JESUP, IA 50648-0296
PO BOX 297, JESUP, IA 50648-0297
PO BOX 298, JESUP, IA 50648-0298
PO BOX 299, JESUP, IA 50648-0299
PO BOX 300, JESUP, IA 50648-0300
PO BOX 301, JESUP, IA 50648-0301
PO BOX 302, JESUP, IA 50648-0302
PO BOX 303, JESUP, IA 50648-0303
PO BOX 304, JESUP, IA 50648-0304
PO BOX 305, JESUP, IA 50648-0305
PO BOX 306, JESUP, IA 50648-0306
PO BOX 307, JESUP, IA 50648-0307
PO BOX 308, JESUP, IA 50648-0308
PO BOX 309, JESUP, IA 50648-0309
PO BOX 310, JESUP, IA 50648-0310
PO BOX 311, JESUP, IA 50648-0311
PO BOX 312, JESUP, IA 50648-0312
PO BOX 313, JESUP, IA 50648-0313
PO BOX 314, JESUP, IA 50648-0314
PO BOX 315, JESUP, IA 50648-0315
PO BOX 316, JESUP, IA 50648-0316
PO BOX 317, JESUP, IA 50648-0317
PO BOX 318, JESUP, IA 50648-0318
PO BOX 319, JESUP, IA 50648-0319
PO BOX 320, JESUP, IA 50648-0320
PO BOX 321, JESUP, IA 50648-0321
PO BOX 322, JESUP, IA 50648-0322
PO BOX 323, JESUP, IA 50648-0323
PO BOX 324, JESUP, IA 50648-0324
PO BOX 325, JESUP, IA 50648-0325
PO BOX 326, JESUP, IA 50648-0326
PO BOX 327, JESUP, IA 50648-0327
PO BOX 328, JESUP, IA 50648-0328
PO BOX 329, JESUP, IA 50648-0329
PO BOX 330, JESUP, IA 50648-0330
PO BOX 331, JESUP, IA 50648-0331
PO BOX 332, JESUP, IA 50648-0332
PO BOX 333, JESUP, IA 50648-0333
PO BOX 334, JESUP, IA 50648-0334
PO BOX 335, JESUP, IA 50648-0335
PO BOX 336, JESUP, IA 50648-0336
PO BOX 337, JESUP, IA 50648-0337
PO BOX 338, JESUP, IA 50648-0338
PO BOX 339, JESUP, IA 50648-0339
PO BOX 340, JESUP, IA 50648-0340
PO BOX 341, JESUP, IA 50648-0341
PO BOX 342, JESUP, IA 50648-0342
PO BOX 343, JESUP, IA 50648-0343
PO BOX 344, JESUP, IA 50648-0344
PO BOX 345, JESUP, IA 50648-0345
PO BOX 346, JESUP, IA 50648-0346
PO BOX 347, JESUP, IA 50648-0347
PO BOX 348, JESUP, IA 50648-0348
PO BOX 349, JESUP, IA 50648-0349
PO BOX 350, JESUP, IA 50648-0350
PO BOX 351, JESUP, IA 50648-0351
PO BOX 352, JESUP, IA 50648-0352
PO BOX 353, JESUP, IA 50648-0353
PO BOX 354, JESUP, IA 50648-0354
PO BOX 355, JESUP, IA 50648-0355
PO BOX 356, JESUP, IA 50648-0356
PO BOX 357, JESUP, IA 50648-0357
PO BOX 358, JESUP, IA 50648-0358
PO BOX 359, JESUP, IA 50648-0359
PO BOX 360, JESUP, IA 50648-0360
PO BOX 361, JESUP, IA 50648-0361
PO BOX 362, JESUP, IA 50648-0362
PO BOX 363, JESUP, IA 50648-0363
PO BOX 364, JESUP, IA 50648-0364
PO BOX 365, JESUP, IA 50648-0365
PO BOX 366, JESUP, IA 50648-0366
PO BOX 367, JESUP, IA 50648-0367
PO BOX 368, JESUP, IA 50648-0368
PO BOX 369, JESUP, IA 50648-0369
PO BOX 370, JESUP, IA 50648-0370
PO BOX 371, JESUP, IA 50648-0371
PO BOX 372, JESUP, IA 50648-0372
PO BOX 373, JESUP, IA 50648-0373
PO BOX 374, JESUP, IA 50648-0374
PO BOX 375, JESUP, IA 50648-0375
PO BOX 376, JESUP, IA 50648-0376
PO BOX 377, JESUP, IA 50648-0377
PO BOX 378, JESUP, IA 50648-0378
PO BOX 379, JESUP, IA 50648-0379
PO BOX 380, JESUP, IA 50648-0380
PO BOX 381, JESUP, IA 50648-0381
PO BOX 382, JESUP, IA 50648-0382
PO BOX 383, JESUP, IA 50648-0383
PO BOX 384, JESUP, IA 50648-0384
PO BOX 385, JESUP, IA 50648-0385
PO BOX 386, JESUP, IA 50648-0386
PO BOX 387, JESUP, IA 50648-0387
PO BOX 388, JESUP, IA 50648-0388
PO BOX 389, JESUP, IA 50648-0389
PO BOX 390, JESUP, IA 50648-0390
PO BOX 391, JESUP, IA 50648-0391
PO BOX 392, JESUP, IA 50648-0392
PO BOX 393, JESUP, IA 50648-0393
PO BOX 394, JESUP, IA 50648-0394
PO BOX 395, JESUP, IA 50648-0395
PO BOX 396, JESUP, IA 50648-0396
PO BOX 397, JESUP, IA 50648-0397
PO BOX 398, JESUP, IA 50648-0398
PO BOX 399, JESUP, IA 50648-0399
PO BOX 400, JESUP, IA 50648-0400
PO BOX 401, JESUP, IA 50648-0401
PO BOX 402, JESUP, IA 50648-0402
PO BOX 403, JESUP, IA 50648-0403
PO BOX 404, JESUP, IA 50648-0404
PO BOX 405, JESUP, IA 50648-0405
PO BOX 406, JESUP, IA 50648-0406
PO BOX 407, JESUP, IA 50648-0407
PO BOX 408, JESUP, IA 50648-0408
PO BOX 409, JESUP, IA 50648-0409
PO BOX 410, JESUP, IA 50648-0410
PO BOX 411, JESUP, IA 50648-0411
PO BOX 412, JESUP, IA 50648-0412
PO BOX 413, JESUP, IA 50648-0413
PO BOX 414, JESUP, IA 50648-0414
PO BOX 415, JESUP, IA 50648-0415
PO BOX 416, JESUP, IA 50648-0416
PO BOX 417, JESUP, IA 50648-0417
PO BOX 418, JESUP, IA 50648-0418
PO BOX 419, JESUP, IA 50648-0419
PO BOX 420, JESUP, IA 50648-0420
PO BOX 421, JESUP, IA 50648-0421
PO BOX 422, JESUP, IA 50648-0422
PO BOX 423, JESUP, IA 50648-0423
PO BOX 424, JESUP, IA 50648-0424
PO BOX 425, JESUP, IA 50648-0425
PO BOX 426, JESUP, IA 50648-0426
PO BOX 427, JESUP, IA 50648-0427
PO BOX 428, JESUP, IA 50648-0428
PO BOX 429, JESUP, IA 50648-0429
PO BOX 430, JESUP, IA 50648-0430
PO BOX 431, JESUP, IA 50648-0431
PO BOX 432, JESUP, IA 50648-0432
PO BOX 433, JESUP, IA 50648-0433
PO BOX 434, JESUP, IA 50648-0434
PO BOX 435, JESUP, IA 50648-0435
PO BOX 436, JESUP, IA 50648-0436
PO BOX 437, JESUP, IA 50648-0437
PO BOX 438, JESUP, IA 50648-0438
PO BOX 439, JESUP, IA 50648-0439
PO BOX 440, JESUP, IA 50648-0440
PO BOX 441, JESUP, IA 50648-0441
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