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 311, CORPUS CHRISTI, TX 78403-0311
PO BOX 312, CORPUS CHRISTI, TX 78403-0312
PO BOX 313, CORPUS CHRISTI, TX 78403-0313
PO BOX 314, CORPUS CHRISTI, TX 78403-0314
PO BOX 315, CORPUS CHRISTI, TX 78403-0315
PO BOX 316, CORPUS CHRISTI, TX 78403-0316
PO BOX 317, CORPUS CHRISTI, TX 78403-0317
PO BOX 318, CORPUS CHRISTI, TX 78403-0318
PO BOX 319, CORPUS CHRISTI, TX 78403-0319
PO BOX 320, CORPUS CHRISTI, TX 78403-0320
PO BOX 321, CORPUS CHRISTI, TX 78403-0321
PO BOX 322, CORPUS CHRISTI, TX 78403-0322
PO BOX 323, CORPUS CHRISTI, TX 78403-0323
PO BOX 324, CORPUS CHRISTI, TX 78403-0324
PO BOX 325, CORPUS CHRISTI, TX 78403-0325
PO BOX 326, CORPUS CHRISTI, TX 78403-0326
PO BOX 327, CORPUS CHRISTI, TX 78403-0327
PO BOX 328, CORPUS CHRISTI, TX 78403-0328
PO BOX 329, CORPUS CHRISTI, TX 78403-0329
PO BOX 330, CORPUS CHRISTI, TX 78403-0330
PO BOX 331, CORPUS CHRISTI, TX 78403-0331
PO BOX 332, CORPUS CHRISTI, TX 78403-0332
PO BOX 333, CORPUS CHRISTI, TX 78403-0333
PO BOX 334, CORPUS CHRISTI, TX 78403-0334
PO BOX 335, CORPUS CHRISTI, TX 78403-0335
PO BOX 336, CORPUS CHRISTI, TX 78403-0336
PO BOX 337, CORPUS CHRISTI, TX 78403-0337
PO BOX 338, CORPUS CHRISTI, TX 78403-0338
PO BOX 339, CORPUS CHRISTI, TX 78403-0339
PO BOX 340, CORPUS CHRISTI, TX 78403-0340
PO BOX 341, CORPUS CHRISTI, TX 78403-0341
PO BOX 342, CORPUS CHRISTI, TX 78403-0342
PO BOX 343, CORPUS CHRISTI, TX 78403-0343
PO BOX 344, CORPUS CHRISTI, TX 78403-0344
PO BOX 345, CORPUS CHRISTI, TX 78403-0345
PO BOX 346, CORPUS CHRISTI, TX 78403-0346
PO BOX 347, CORPUS CHRISTI, TX 78403-0347
PO BOX 348, CORPUS CHRISTI, TX 78403-0348
PO BOX 349, CORPUS CHRISTI, TX 78403-0349
PO BOX 350, CORPUS CHRISTI, TX 78403-0350
PO BOX 351, CORPUS CHRISTI, TX 78403-0351
PO BOX 352, CORPUS CHRISTI, TX 78403-0352
PO BOX 353, CORPUS CHRISTI, TX 78403-0353
PO BOX 354, CORPUS CHRISTI, TX 78403-0354
PO BOX 355, CORPUS CHRISTI, TX 78403-0355
PO BOX 356, CORPUS CHRISTI, TX 78403-0356
PO BOX 357, CORPUS CHRISTI, TX 78403-0357
PO BOX 358, CORPUS CHRISTI, TX 78403-0358
PO BOX 359, CORPUS CHRISTI, TX 78403-0359
PO BOX 360, CORPUS CHRISTI, TX 78403-0360
PO BOX 361, CORPUS CHRISTI, TX 78403-0361
PO BOX 362, CORPUS CHRISTI, TX 78403-0362
PO BOX 363, CORPUS CHRISTI, TX 78403-0363
PO BOX 364, CORPUS CHRISTI, TX 78403-0364
PO BOX 365, CORPUS CHRISTI, TX 78403-0365
PO BOX 366, CORPUS CHRISTI, TX 78403-0366
PO BOX 367, CORPUS CHRISTI, TX 78403-0367
PO BOX 368, CORPUS CHRISTI, TX 78403-0368
PO BOX 369, CORPUS CHRISTI, TX 78403-0369
PO BOX 370, CORPUS CHRISTI, TX 78403-0370
PO BOX 371, CORPUS CHRISTI, TX 78403-0371
PO BOX 372, CORPUS CHRISTI, TX 78403-0372
PO BOX 373, CORPUS CHRISTI, TX 78403-0373
PO BOX 374, CORPUS CHRISTI, TX 78403-0374
PO BOX 375, CORPUS CHRISTI, TX 78403-0375
PO BOX 376, CORPUS CHRISTI, TX 78403-0376
PO BOX 377, CORPUS CHRISTI, TX 78403-0377
PO BOX 378, CORPUS CHRISTI, TX 78403-0378
PO BOX 379, CORPUS CHRISTI, TX 78403-0379
PO BOX 380, CORPUS CHRISTI, TX 78403-0380
PO BOX 381, CORPUS CHRISTI, TX 78403-0381
PO BOX 382, CORPUS CHRISTI, TX 78403-0382
PO BOX 383, CORPUS CHRISTI, TX 78403-0383
PO BOX 384, CORPUS CHRISTI, TX 78403-0384
PO BOX 385, CORPUS CHRISTI, TX 78403-0385
PO BOX 386, CORPUS CHRISTI, TX 78403-0386
PO BOX 387, CORPUS CHRISTI, TX 78403-0387
PO BOX 388, CORPUS CHRISTI, TX 78403-0388
PO BOX 389, CORPUS CHRISTI, TX 78403-0389
PO BOX 390, CORPUS CHRISTI, TX 78403-0390
PO BOX 391, CORPUS CHRISTI, TX 78403-0391
PO BOX 392, CORPUS CHRISTI, TX 78403-0392
PO BOX 393, CORPUS CHRISTI, TX 78403-0393
PO BOX 394, CORPUS CHRISTI, TX 78403-0394
PO BOX 395, CORPUS CHRISTI, TX 78403-0395
PO BOX 396, CORPUS CHRISTI, TX 78403-0396
PO BOX 397, CORPUS CHRISTI, TX 78403-0397
PO BOX 398, CORPUS CHRISTI, TX 78403-0398
PO BOX 399, CORPUS CHRISTI, TX 78403-0399
PO BOX 400, CORPUS CHRISTI, TX 78403-0400
PO BOX 401, CORPUS CHRISTI, TX 78403-0401
PO BOX 402, CORPUS CHRISTI, TX 78403-0402
PO BOX 403, CORPUS CHRISTI, TX 78403-0403
PO BOX 404, CORPUS CHRISTI, TX 78403-0404
PO BOX 405, CORPUS CHRISTI, TX 78403-0405
PO BOX 406, CORPUS CHRISTI, TX 78403-0406
PO BOX 407, CORPUS CHRISTI, TX 78403-0407
PO BOX 408, CORPUS CHRISTI, TX 78403-0408
PO BOX 409, CORPUS CHRISTI, TX 78403-0409
PO BOX 410, CORPUS CHRISTI, TX 78403-0410
PO BOX 411, CORPUS CHRISTI, TX 78403-0411
PO BOX 412, CORPUS CHRISTI, TX 78403-0412
PO BOX 413, CORPUS CHRISTI, TX 78403-0413
PO BOX 414, CORPUS CHRISTI, TX 78403-0414
PO BOX 415, CORPUS CHRISTI, TX 78403-0415
PO BOX 416, CORPUS CHRISTI, TX 78403-0416
PO BOX 417, CORPUS CHRISTI, TX 78403-0417
PO BOX 418, CORPUS CHRISTI, TX 78403-0418
PO BOX 419, CORPUS CHRISTI, TX 78403-0419
PO BOX 420, CORPUS CHRISTI, TX 78403-0420
PO BOX 421, CORPUS CHRISTI, TX 78403-0421
PO BOX 422, CORPUS CHRISTI, TX 78403-0422
PO BOX 423, CORPUS CHRISTI, TX 78403-0423
PO BOX 424, CORPUS CHRISTI, TX 78403-0424
PO BOX 425, CORPUS CHRISTI, TX 78403-0425
PO BOX 426, CORPUS CHRISTI, TX 78403-0426
PO BOX 427, CORPUS CHRISTI, TX 78403-0427
PO BOX 428, CORPUS CHRISTI, TX 78403-0428
PO BOX 429, CORPUS CHRISTI, TX 78403-0429
PO BOX 430, CORPUS CHRISTI, TX 78403-0430
PO BOX 431, CORPUS CHRISTI, TX 78403-0431
PO BOX 432, CORPUS CHRISTI, TX 78403-0432
PO BOX 433, CORPUS CHRISTI, TX 78403-0433
PO BOX 434, CORPUS CHRISTI, TX 78403-0434
PO BOX 435, CORPUS CHRISTI, TX 78403-0435
PO BOX 436, CORPUS CHRISTI, TX 78403-0436
PO BOX 437, CORPUS CHRISTI, TX 78403-0437
PO BOX 438, CORPUS CHRISTI, TX 78403-0438
PO BOX 439, CORPUS CHRISTI, TX 78403-0439
PO BOX 440, CORPUS CHRISTI, TX 78403-0440
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