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 3241, LANCASTER, CA 93586-0241
PO BOX 3242, LANCASTER, CA 93586-0242
PO BOX 3243, LANCASTER, CA 93586-0243
PO BOX 3244, LANCASTER, CA 93586-0244
PO BOX 3245, LANCASTER, CA 93586-0245
PO BOX 3246, LANCASTER, CA 93586-0246
PO BOX 3247, LANCASTER, CA 93586-0247
PO BOX 3248, LANCASTER, CA 93586-0248
PO BOX 3249, LANCASTER, CA 93586-0249
PO BOX 3250, LANCASTER, CA 93586-0250
PO BOX 3251, LANCASTER, CA 93586-0251
PO BOX 3252, LANCASTER, CA 93586-0252
PO BOX 3253, LANCASTER, CA 93586-0253
PO BOX 3254, LANCASTER, CA 93586-0254
PO BOX 3255, LANCASTER, CA 93586-0255
PO BOX 3256, LANCASTER, CA 93586-0256
PO BOX 3257, LANCASTER, CA 93586-0257
PO BOX 3258, LANCASTER, CA 93586-0258
PO BOX 3259, LANCASTER, CA 93586-0259
PO BOX 3260, LANCASTER, CA 93586-0260
PO BOX 3261, LANCASTER, CA 93586-0261
PO BOX 3262, LANCASTER, CA 93586-0262
PO BOX 3263, LANCASTER, CA 93586-0263
PO BOX 3264, LANCASTER, CA 93586-0264
PO BOX 3265, LANCASTER, CA 93586-0265
PO BOX 3266, LANCASTER, CA 93586-0266
PO BOX 3267, LANCASTER, CA 93586-0267
PO BOX 3268, LANCASTER, CA 93586-0268
PO BOX 3269, LANCASTER, CA 93586-0269
PO BOX 3270, LANCASTER, CA 93586-0270
PO BOX 3271, LANCASTER, CA 93586-0271
PO BOX 3272, LANCASTER, CA 93586-0272
PO BOX 3273, LANCASTER, CA 93586-0273
PO BOX 3274, LANCASTER, CA 93586-0274
PO BOX 3275, LANCASTER, CA 93586-0275
PO BOX 3276, LANCASTER, CA 93586-0276
PO BOX 3277, LANCASTER, CA 93586-0277
PO BOX 3278, LANCASTER, CA 93586-0278
PO BOX 3279, LANCASTER, CA 93586-0279
PO BOX 3280, LANCASTER, CA 93586-0280
PO BOX 3281, LANCASTER, CA 93586-0281
PO BOX 3282, LANCASTER, CA 93586-0282
PO BOX 3283, LANCASTER, CA 93586-0283
PO BOX 3284, LANCASTER, CA 93586-0284
PO BOX 3285, LANCASTER, CA 93586-0285
PO BOX 3286, LANCASTER, CA 93586-0286
PO BOX 3287, LANCASTER, CA 93586-0287
PO BOX 3288, LANCASTER, CA 93586-0288
PO BOX 3289, LANCASTER, CA 93586-0289
PO BOX 3290, LANCASTER, CA 93586-0290
PO BOX 3291, LANCASTER, CA 93586-0291
PO BOX 3292, LANCASTER, CA 93586-0292
PO BOX 3293, LANCASTER, CA 93586-0293
PO BOX 3294, LANCASTER, CA 93586-0294
PO BOX 3295, LANCASTER, CA 93586-0295
PO BOX 3296, LANCASTER, CA 93586-0296
PO BOX 3297, LANCASTER, CA 93586-0297
PO BOX 3298, LANCASTER, CA 93586-0298
PO BOX 3299, LANCASTER, CA 93586-0299
PO BOX 3300, LANCASTER, CA 93586-0300
PO BOX 3301, LANCASTER, CA 93586-0301
PO BOX 3302, LANCASTER, CA 93586-0302
PO BOX 3303, LANCASTER, CA 93586-0303
PO BOX 3304, LANCASTER, CA 93586-0304
PO BOX 3305, LANCASTER, CA 93586-0305
PO BOX 3306, LANCASTER, CA 93586-0306
PO BOX 3307, LANCASTER, CA 93586-0307
PO BOX 3308, LANCASTER, CA 93586-0308
PO BOX 3309, LANCASTER, CA 93586-0309
PO BOX 3310, LANCASTER, CA 93586-0310
PO BOX 3311, LANCASTER, CA 93586-0311
PO BOX 3312, LANCASTER, CA 93586-0312
PO BOX 3313, LANCASTER, CA 93586-0313
PO BOX 3314, LANCASTER, CA 93586-0314
PO BOX 3315, LANCASTER, CA 93586-0315
PO BOX 3316, LANCASTER, CA 93586-0316
PO BOX 3317, LANCASTER, CA 93586-0317
PO BOX 3318, LANCASTER, CA 93586-0318
PO BOX 3319, LANCASTER, CA 93586-0319
PO BOX 3320, LANCASTER, CA 93586-0320
PO BOX 3321, LANCASTER, CA 93586-0321
PO BOX 3322, LANCASTER, CA 93586-0322
PO BOX 3323, LANCASTER, CA 93586-0323
PO BOX 3324, LANCASTER, CA 93586-0324
PO BOX 3325, LANCASTER, CA 93586-0325
PO BOX 3326, LANCASTER, CA 93586-0326
PO BOX 3327, LANCASTER, CA 93586-0327
PO BOX 3328, LANCASTER, CA 93586-0328
PO BOX 3329, LANCASTER, CA 93586-0329
PO BOX 3330, LANCASTER, CA 93586-0330
PO BOX 3331, LANCASTER, CA 93586-0331
PO BOX 3332, LANCASTER, CA 93586-0332
PO BOX 3333, LANCASTER, CA 93586-0333
PO BOX 3334, LANCASTER, CA 93586-0334
PO BOX 3335, LANCASTER, CA 93586-0335
PO BOX 3336, LANCASTER, CA 93586-0336
PO BOX 3337, LANCASTER, CA 93586-0337
PO BOX 3338, LANCASTER, CA 93586-0338
PO BOX 3339, LANCASTER, CA 93586-0339
PO BOX 3340, LANCASTER, CA 93586-0340
PO BOX 3341, LANCASTER, CA 93586-0341
PO BOX 3342, LANCASTER, CA 93586-0342
PO BOX 3343, LANCASTER, CA 93586-0343
PO BOX 3344, LANCASTER, CA 93586-0344
PO BOX 3345, LANCASTER, CA 93586-0345
PO BOX 3346, LANCASTER, CA 93586-0346
PO BOX 3347, LANCASTER, CA 93586-0347
PO BOX 3348, LANCASTER, CA 93586-0348
PO BOX 3349, LANCASTER, CA 93586-0349
PO BOX 3350, LANCASTER, CA 93586-0350
PO BOX 3351, LANCASTER, CA 93586-0351
PO BOX 3352, LANCASTER, CA 93586-0352
PO BOX 3353, LANCASTER, CA 93586-0353
PO BOX 3354, LANCASTER, CA 93586-0354
PO BOX 3355, LANCASTER, CA 93586-0355
PO BOX 3356, LANCASTER, CA 93586-0356
PO BOX 3357, LANCASTER, CA 93586-0357
PO BOX 3358, LANCASTER, CA 93586-0358
PO BOX 3359, LANCASTER, CA 93586-0359
PO BOX 3360, LANCASTER, CA 93586-0360
PO BOX 3361, LANCASTER, CA 93586-0361
PO BOX 3362, LANCASTER, CA 93586-0362
PO BOX 3363, LANCASTER, CA 93586-0363
PO BOX 3364, LANCASTER, CA 93586-0364
PO BOX 3365, LANCASTER, CA 93586-0365
PO BOX 3366, LANCASTER, CA 93586-0366
PO BOX 3367, LANCASTER, CA 93586-0367
PO BOX 3368, LANCASTER, CA 93586-0368
PO BOX 3369, LANCASTER, CA 93586-0369
PO BOX 3370, LANCASTER, CA 93586-0370
PO BOX 3371, LANCASTER, CA 93586-0371
PO BOX 3372, LANCASTER, CA 93586-0372
PO BOX 3373, LANCASTER, CA 93586-0373
PO BOX 3374, LANCASTER, CA 93586-0374
PO BOX 3375, LANCASTER, CA 93586-0375
PO BOX 3376, LANCASTER, CA 93586-0376
PO BOX 3377, LANCASTER, CA 93586-0377
PO BOX 3378, LANCASTER, CA 93586-0378
PO BOX 3379, LANCASTER, CA 93586-0379
PO BOX 3380, LANCASTER, CA 93586-0380
PO BOX 3381, LANCASTER, CA 93586-0381
PO BOX 3382, LANCASTER, CA 93586-0382
PO BOX 3383, LANCASTER, CA 93586-0383
PO BOX 3384, LANCASTER, CA 93586-0384
PO BOX 3385, LANCASTER, CA 93586-0385
PO BOX 3386, LANCASTER, CA 93586-0386
PO BOX 3387, LANCASTER, CA 93586-0387
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