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, HUNTINGTON BEACH, CA 92648-0241
PO BOX 242, HUNTINGTON BEACH, CA 92648-0242
PO BOX 243, HUNTINGTON BEACH, CA 92648-0243
PO BOX 244, HUNTINGTON BEACH, CA 92648-0244
PO BOX 245, HUNTINGTON BEACH, CA 92648-0245
PO BOX 246, HUNTINGTON BEACH, CA 92648-0246
PO BOX 247, HUNTINGTON BEACH, CA 92648-0247
PO BOX 248, HUNTINGTON BEACH, CA 92648-0248
PO BOX 249, HUNTINGTON BEACH, CA 92648-0249
PO BOX 250, HUNTINGTON BEACH, CA 92648-0250
PO BOX 251, HUNTINGTON BEACH, CA 92648-0251
PO BOX 252, HUNTINGTON BEACH, CA 92648-0252
PO BOX 253, HUNTINGTON BEACH, CA 92648-0253
PO BOX 254, HUNTINGTON BEACH, CA 92648-0254
PO BOX 255, HUNTINGTON BEACH, CA 92648-0255
PO BOX 256, HUNTINGTON BEACH, CA 92648-0256
PO BOX 257, HUNTINGTON BEACH, CA 92648-0257
PO BOX 258, HUNTINGTON BEACH, CA 92648-0258
PO BOX 259, HUNTINGTON BEACH, CA 92648-0259
PO BOX 260, HUNTINGTON BEACH, CA 92648-0260
PO BOX 261, HUNTINGTON BEACH, CA 92648-0261
PO BOX 262, HUNTINGTON BEACH, CA 92648-0262
PO BOX 263, HUNTINGTON BEACH, CA 92648-0263
PO BOX 264, HUNTINGTON BEACH, CA 92648-0264
PO BOX 265, HUNTINGTON BEACH, CA 92648-0265
PO BOX 266, HUNTINGTON BEACH, CA 92648-0266
PO BOX 267, HUNTINGTON BEACH, CA 92648-0267
PO BOX 268, HUNTINGTON BEACH, CA 92648-0268
PO BOX 269, HUNTINGTON BEACH, CA 92648-0269
PO BOX 270, HUNTINGTON BEACH, CA 92648-0270
PO BOX 271, HUNTINGTON BEACH, CA 92648-0271
PO BOX 272, HUNTINGTON BEACH, CA 92648-0272
PO BOX 273, HUNTINGTON BEACH, CA 92648-0273
PO BOX 274, HUNTINGTON BEACH, CA 92648-0274
PO BOX 275, HUNTINGTON BEACH, CA 92648-0275
PO BOX 276, HUNTINGTON BEACH, CA 92648-0276
PO BOX 277, HUNTINGTON BEACH, CA 92648-0277
PO BOX 278, HUNTINGTON BEACH, CA 92648-0278
PO BOX 279, HUNTINGTON BEACH, CA 92648-0279
PO BOX 280, HUNTINGTON BEACH, CA 92648-0280
PO BOX 281, HUNTINGTON BEACH, CA 92648-0281
PO BOX 282, HUNTINGTON BEACH, CA 92648-0282
PO BOX 283, HUNTINGTON BEACH, CA 92648-0283
PO BOX 284, HUNTINGTON BEACH, CA 92648-0284
PO BOX 285, HUNTINGTON BEACH, CA 92648-0285
PO BOX 286, HUNTINGTON BEACH, CA 92648-0286
PO BOX 287, HUNTINGTON BEACH, CA 92648-0287
PO BOX 288, HUNTINGTON BEACH, CA 92648-0288
PO BOX 289, HUNTINGTON BEACH, CA 92648-0289
PO BOX 290, HUNTINGTON BEACH, CA 92648-0290
PO BOX 291, HUNTINGTON BEACH, CA 92648-0291
PO BOX 292, HUNTINGTON BEACH, CA 92648-0292
PO BOX 293, HUNTINGTON BEACH, CA 92648-0293
PO BOX 294, HUNTINGTON BEACH, CA 92648-0294
PO BOX 295, HUNTINGTON BEACH, CA 92648-0295
PO BOX 296, HUNTINGTON BEACH, CA 92648-0296
PO BOX 297, HUNTINGTON BEACH, CA 92648-0297
PO BOX 298, HUNTINGTON BEACH, CA 92648-0298
PO BOX 299, HUNTINGTON BEACH, CA 92648-0299
PO BOX 300, HUNTINGTON BEACH, CA 92648-0300
PO BOX 301, HUNTINGTON BEACH, CA 92648-0301
PO BOX 302, HUNTINGTON BEACH, CA 92648-0302
PO BOX 303, HUNTINGTON BEACH, CA 92648-0303
PO BOX 304, HUNTINGTON BEACH, CA 92648-0304
PO BOX 305, HUNTINGTON BEACH, CA 92648-0305
PO BOX 306, HUNTINGTON BEACH, CA 92648-0306
PO BOX 307, HUNTINGTON BEACH, CA 92648-0307
PO BOX 308, HUNTINGTON BEACH, CA 92648-0308
PO BOX 309, HUNTINGTON BEACH, CA 92648-0309
PO BOX 310, HUNTINGTON BEACH, CA 92648-0310
PO BOX 311, HUNTINGTON BEACH, CA 92648-0311
PO BOX 312, HUNTINGTON BEACH, CA 92648-0312
PO BOX 313, HUNTINGTON BEACH, CA 92648-0313
PO BOX 314, HUNTINGTON BEACH, CA 92648-0314
PO BOX 315, HUNTINGTON BEACH, CA 92648-0315
PO BOX 316, HUNTINGTON BEACH, CA 92648-0316
PO BOX 317, HUNTINGTON BEACH, CA 92648-0317
PO BOX 318, HUNTINGTON BEACH, CA 92648-0318
PO BOX 319, HUNTINGTON BEACH, CA 92648-0319
PO BOX 320, HUNTINGTON BEACH, CA 92648-0320
PO BOX 321, HUNTINGTON BEACH, CA 92648-0321
PO BOX 322, HUNTINGTON BEACH, CA 92648-0322
PO BOX 323, HUNTINGTON BEACH, CA 92648-0323
PO BOX 324, HUNTINGTON BEACH, CA 92648-0324
PO BOX 325, HUNTINGTON BEACH, CA 92648-0325
PO BOX 326, HUNTINGTON BEACH, CA 92648-0326
PO BOX 327, HUNTINGTON BEACH, CA 92648-0327
PO BOX 328, HUNTINGTON BEACH, CA 92648-0328
PO BOX 329, HUNTINGTON BEACH, CA 92648-0329
PO BOX 330, HUNTINGTON BEACH, CA 92648-0330
PO BOX 331, HUNTINGTON BEACH, CA 92648-0331
PO BOX 332, HUNTINGTON BEACH, CA 92648-0332
PO BOX 333, HUNTINGTON BEACH, CA 92648-0333
PO BOX 334, HUNTINGTON BEACH, CA 92648-0334
PO BOX 335, HUNTINGTON BEACH, CA 92648-0335
PO BOX 336, HUNTINGTON BEACH, CA 92648-0336
PO BOX 337, HUNTINGTON BEACH, CA 92648-0337
PO BOX 338, HUNTINGTON BEACH, CA 92648-0338
PO BOX 339, HUNTINGTON BEACH, CA 92648-0339
PO BOX 340, HUNTINGTON BEACH, CA 92648-0340
PO BOX 341, HUNTINGTON BEACH, CA 92648-0341
PO BOX 342, HUNTINGTON BEACH, CA 92648-0342
PO BOX 343, HUNTINGTON BEACH, CA 92648-0343
PO BOX 344, HUNTINGTON BEACH, CA 92648-0344
PO BOX 345, HUNTINGTON BEACH, CA 92648-0345
PO BOX 346, HUNTINGTON BEACH, CA 92648-0346
PO BOX 347, HUNTINGTON BEACH, CA 92648-0347
PO BOX 348, HUNTINGTON BEACH, CA 92648-0348
PO BOX 349, HUNTINGTON BEACH, CA 92648-0349
PO BOX 350, HUNTINGTON BEACH, CA 92648-0350
PO BOX 351, HUNTINGTON BEACH, CA 92648-0351
PO BOX 352, HUNTINGTON BEACH, CA 92648-0352
PO BOX 353, HUNTINGTON BEACH, CA 92648-0353
PO BOX 354, HUNTINGTON BEACH, CA 92648-0354
PO BOX 355, HUNTINGTON BEACH, CA 92648-0355
PO BOX 356, HUNTINGTON BEACH, CA 92648-0356
PO BOX 357, HUNTINGTON BEACH, CA 92648-0357
PO BOX 358, HUNTINGTON BEACH, CA 92648-0358
PO BOX 359, HUNTINGTON BEACH, CA 92648-0359
PO BOX 360, HUNTINGTON BEACH, CA 92648-0360
PO BOX 361, HUNTINGTON BEACH, CA 92648-0361
PO BOX 362, HUNTINGTON BEACH, CA 92648-0362
PO BOX 363, HUNTINGTON BEACH, CA 92648-0363
PO BOX 364, HUNTINGTON BEACH, CA 92648-0364
PO BOX 365, HUNTINGTON BEACH, CA 92648-0365
PO BOX 366, HUNTINGTON BEACH, CA 92648-0366
PO BOX 367, HUNTINGTON BEACH, CA 92648-0367
PO BOX 368, HUNTINGTON BEACH, CA 92648-0368
PO BOX 369, HUNTINGTON BEACH, CA 92648-0369
PO BOX 370, HUNTINGTON BEACH, CA 92648-0370
PO BOX 371, HUNTINGTON BEACH, CA 92648-0371
PO BOX 372, HUNTINGTON BEACH, CA 92648-0372
PO BOX 373, HUNTINGTON BEACH, CA 92648-0373
PO BOX 374, HUNTINGTON BEACH, CA 92648-0374
PO BOX 375, HUNTINGTON BEACH, CA 92648-0375
PO BOX 376, HUNTINGTON BEACH, CA 92648-0376
PO BOX 377, HUNTINGTON BEACH, CA 92648-0377
PO BOX 378, HUNTINGTON BEACH, CA 92648-0378
PO BOX 379, HUNTINGTON BEACH, CA 92648-0379
PO BOX 380, HUNTINGTON BEACH, CA 92648-0380
PO BOX 381, HUNTINGTON BEACH, CA 92648-0381
PO BOX 382, HUNTINGTON BEACH, CA 92648-0382
PO BOX 383, HUNTINGTON BEACH, CA 92648-0383
PO BOX 384, HUNTINGTON BEACH, CA 92648-0384
PO BOX 385, HUNTINGTON BEACH, CA 92648-0385
PO BOX 386, HUNTINGTON BEACH, CA 92648-0386
PO BOX 387, HUNTINGTON BEACH, CA 92648-0387
PO BOX 388, HUNTINGTON BEACH, CA 92648-0388
PO BOX 389, HUNTINGTON BEACH, CA 92648-0389
PO BOX 390, HUNTINGTON BEACH, CA 92648-0390
PO BOX 391, HUNTINGTON BEACH, CA 92648-0391
PO BOX 392, HUNTINGTON BEACH, CA 92648-0392
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