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, LA JOLLA, CA 92038-0241
PO BOX 242, LA JOLLA, CA 92038-0242
PO BOX 243, LA JOLLA, CA 92038-0243
PO BOX 244, LA JOLLA, CA 92038-0244
PO BOX 245, LA JOLLA, CA 92038-0245
PO BOX 246, LA JOLLA, CA 92038-0246
PO BOX 247, LA JOLLA, CA 92038-0247
PO BOX 248, LA JOLLA, CA 92038-0248
PO BOX 249, LA JOLLA, CA 92038-0249
PO BOX 250, LA JOLLA, CA 92038-0250
PO BOX 251, LA JOLLA, CA 92038-0251
PO BOX 252, LA JOLLA, CA 92038-0252
PO BOX 253, LA JOLLA, CA 92038-0253
PO BOX 254, LA JOLLA, CA 92038-0254
PO BOX 255, LA JOLLA, CA 92038-0255
PO BOX 256, LA JOLLA, CA 92038-0256
PO BOX 257, LA JOLLA, CA 92038-0257
PO BOX 258, LA JOLLA, CA 92038-0258
PO BOX 259, LA JOLLA, CA 92038-0259
PO BOX 260, LA JOLLA, CA 92038-0260
PO BOX 261, LA JOLLA, CA 92038-0261
PO BOX 262, LA JOLLA, CA 92038-0262
PO BOX 263, LA JOLLA, CA 92038-0263
PO BOX 264, LA JOLLA, CA 92038-0264
PO BOX 265, LA JOLLA, CA 92038-0265
PO BOX 266, LA JOLLA, CA 92038-0266
PO BOX 267, LA JOLLA, CA 92038-0267
PO BOX 268, LA JOLLA, CA 92038-0268
PO BOX 269, LA JOLLA, CA 92038-0269
PO BOX 270, LA JOLLA, CA 92038-0270
PO BOX 271, LA JOLLA, CA 92038-0271
PO BOX 272, LA JOLLA, CA 92038-0272
PO BOX 273, LA JOLLA, CA 92038-0273
PO BOX 274, LA JOLLA, CA 92038-0274
PO BOX 275, LA JOLLA, CA 92038-0275
PO BOX 276, LA JOLLA, CA 92038-0276
PO BOX 277, LA JOLLA, CA 92038-0277
PO BOX 278, LA JOLLA, CA 92038-0278
PO BOX 279, LA JOLLA, CA 92038-0279
PO BOX 280, LA JOLLA, CA 92038-0280
PO BOX 281, LA JOLLA, CA 92038-0281
PO BOX 282, LA JOLLA, CA 92038-0282
PO BOX 283, LA JOLLA, CA 92038-0283
PO BOX 284, LA JOLLA, CA 92038-0284
PO BOX 285, LA JOLLA, CA 92038-0285
PO BOX 286, LA JOLLA, CA 92038-0286
PO BOX 287, LA JOLLA, CA 92038-0287
PO BOX 288, LA JOLLA, CA 92038-0288
PO BOX 289, LA JOLLA, CA 92038-0289
PO BOX 290, LA JOLLA, CA 92038-0290
PO BOX 291, LA JOLLA, CA 92038-0291
PO BOX 292, LA JOLLA, CA 92038-0292
PO BOX 293, LA JOLLA, CA 92038-0293
PO BOX 294, LA JOLLA, CA 92038-0294
PO BOX 295, LA JOLLA, CA 92038-0295
PO BOX 296, LA JOLLA, CA 92038-0296
PO BOX 297, LA JOLLA, CA 92038-0297
PO BOX 298, LA JOLLA, CA 92038-0298
PO BOX 299, LA JOLLA, CA 92038-0299
PO BOX 300, LA JOLLA, CA 92038-0300
PO BOX 301, LA JOLLA, CA 92038-0301
PO BOX 302, LA JOLLA, CA 92038-0302
PO BOX 303, LA JOLLA, CA 92038-0303
PO BOX 304, LA JOLLA, CA 92038-0304
PO BOX 305, LA JOLLA, CA 92038-0305
PO BOX 306, LA JOLLA, CA 92038-0306
PO BOX 307, LA JOLLA, CA 92038-0307
PO BOX 308, LA JOLLA, CA 92038-0308
PO BOX 309, LA JOLLA, CA 92038-0309
PO BOX 310, LA JOLLA, CA 92038-0310
PO BOX 311, LA JOLLA, CA 92038-0311
PO BOX 312, LA JOLLA, CA 92038-0312
PO BOX 313, LA JOLLA, CA 92038-0313
PO BOX 314, LA JOLLA, CA 92038-0314
PO BOX 315, LA JOLLA, CA 92038-0315
PO BOX 316, LA JOLLA, CA 92038-0316
PO BOX 317, LA JOLLA, CA 92038-0317
PO BOX 318, LA JOLLA, CA 92038-0318
PO BOX 319, LA JOLLA, CA 92038-0319
PO BOX 320, LA JOLLA, CA 92038-0320
PO BOX 321, LA JOLLA, CA 92038-0321
PO BOX 322, LA JOLLA, CA 92038-0322
PO BOX 323, LA JOLLA, CA 92038-0323
PO BOX 324, LA JOLLA, CA 92038-0324
PO BOX 325, LA JOLLA, CA 92038-0325
PO BOX 326, LA JOLLA, CA 92038-0326
PO BOX 327, LA JOLLA, CA 92038-0327
PO BOX 328, LA JOLLA, CA 92038-0328
PO BOX 329, LA JOLLA, CA 92038-0329
PO BOX 330, LA JOLLA, CA 92038-0330
PO BOX 331, LA JOLLA, CA 92038-0331
PO BOX 332, LA JOLLA, CA 92038-0332
PO BOX 333, LA JOLLA, CA 92038-0333
PO BOX 334, LA JOLLA, CA 92038-0334
PO BOX 335, LA JOLLA, CA 92038-0335
PO BOX 336, LA JOLLA, CA 92038-0336
PO BOX 337, LA JOLLA, CA 92038-0337
PO BOX 338, LA JOLLA, CA 92038-0338
PO BOX 339, LA JOLLA, CA 92038-0339
PO BOX 340, LA JOLLA, CA 92038-0340
PO BOX 341, LA JOLLA, CA 92038-0341
PO BOX 342, LA JOLLA, CA 92038-0342
PO BOX 343, LA JOLLA, CA 92038-0343
PO BOX 344, LA JOLLA, CA 92038-0344
PO BOX 345, LA JOLLA, CA 92038-0345
PO BOX 346, LA JOLLA, CA 92038-0346
PO BOX 347, LA JOLLA, CA 92038-0347
PO BOX 348, LA JOLLA, CA 92038-0348
PO BOX 349, LA JOLLA, CA 92038-0349
PO BOX 350, LA JOLLA, CA 92038-0350
PO BOX 351, LA JOLLA, CA 92038-0351
PO BOX 352, LA JOLLA, CA 92038-0352
PO BOX 353, LA JOLLA, CA 92038-0353
PO BOX 354, LA JOLLA, CA 92038-0354
PO BOX 355, LA JOLLA, CA 92038-0355
PO BOX 356, LA JOLLA, CA 92038-0356
PO BOX 357, LA JOLLA, CA 92038-0357
PO BOX 358, LA JOLLA, CA 92038-0358
PO BOX 359, LA JOLLA, CA 92038-0359
PO BOX 360, LA JOLLA, CA 92038-0360
PO BOX 361, LA JOLLA, CA 92038-0361
PO BOX 362, LA JOLLA, CA 92038-0362
PO BOX 363, LA JOLLA, CA 92038-0363
PO BOX 364, LA JOLLA, CA 92038-0364
PO BOX 365, LA JOLLA, CA 92038-0365
PO BOX 366, LA JOLLA, CA 92038-0366
PO BOX 367, LA JOLLA, CA 92038-0367
PO BOX 368, LA JOLLA, CA 92038-0368
PO BOX 369, LA JOLLA, CA 92038-0369
PO BOX 370, LA JOLLA, CA 92038-0370
PO BOX 371, LA JOLLA, CA 92038-0371
PO BOX 372, LA JOLLA, CA 92038-0372
PO BOX 373, LA JOLLA, CA 92038-0373
PO BOX 374, LA JOLLA, CA 92038-0374
PO BOX 375, LA JOLLA, CA 92038-0375
PO BOX 376, LA JOLLA, CA 92038-0376
PO BOX 377, LA JOLLA, CA 92038-0377
PO BOX 378, LA JOLLA, CA 92038-0378
PO BOX 379, LA JOLLA, CA 92038-0379
PO BOX 380, LA JOLLA, CA 92038-0380
PO BOX 381, LA JOLLA, CA 92038-0381
PO BOX 382, LA JOLLA, CA 92038-0382
PO BOX 383, LA JOLLA, CA 92038-0383
PO BOX 384, LA JOLLA, CA 92038-0384
PO BOX 385, LA JOLLA, CA 92038-0385
PO BOX 386, LA JOLLA, CA 92038-0386
PO BOX 387, LA JOLLA, CA 92038-0387
PO BOX 388, LA JOLLA, CA 92038-0388
PO BOX 389, LA JOLLA, CA 92038-0389
PO BOX 390, LA JOLLA, CA 92038-0390
PO BOX 391, LA JOLLA, CA 92038-0391
PO BOX 392, LA JOLLA, CA 92038-0392
PO BOX 393, LA JOLLA, CA 92038-0393
PO BOX 394, LA JOLLA, CA 92038-0394
PO BOX 395, LA JOLLA, CA 92038-0395
PO BOX 396, LA JOLLA, CA 92038-0396
PO BOX 397, LA JOLLA, CA 92038-0397
PO BOX 398, LA JOLLA, CA 92038-0398
PO BOX 399, LA JOLLA, CA 92038-0399
PO BOX 400, LA JOLLA, CA 92038-0400
PO BOX 401, LA JOLLA, CA 92038-0401
PO BOX 402, LA JOLLA, CA 92038-0402
PO BOX 403, LA JOLLA, CA 92038-0403
PO BOX 404, LA JOLLA, CA 92038-0404
PO BOX 405, LA JOLLA, CA 92038-0405
PO BOX 406, LA JOLLA, CA 92038-0406
PO BOX 407, LA JOLLA, CA 92038-0407
PO BOX 408, LA JOLLA, CA 92038-0408
PO BOX 409, LA JOLLA, CA 92038-0409
PO BOX 410, LA JOLLA, CA 92038-0410
PO BOX 411, LA JOLLA, CA 92038-0411
PO BOX 412, LA JOLLA, CA 92038-0412
PO BOX 413, LA JOLLA, CA 92038-0413
PO BOX 414, LA JOLLA, CA 92038-0414
PO BOX 415, LA JOLLA, CA 92038-0415
PO BOX 416, LA JOLLA, CA 92038-0416
PO BOX 417, LA JOLLA, CA 92038-0417
PO BOX 418, LA JOLLA, CA 92038-0418
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