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 3251, SPRINGFIELD, MO 65808-3251
PO BOX 3252, SPRINGFIELD, MO 65808-3252
PO BOX 3253, SPRINGFIELD, MO 65808-3253
PO BOX 3254, SPRINGFIELD, MO 65808-3254
PO BOX 3255, SPRINGFIELD, MO 65808-3255
PO BOX 3256, SPRINGFIELD, MO 65808-3256
PO BOX 3257, SPRINGFIELD, MO 65808-3257
PO BOX 3258, SPRINGFIELD, MO 65808-3258
PO BOX 3259, SPRINGFIELD, MO 65808-3259
PO BOX 3260, SPRINGFIELD, MO 65808-3260
PO BOX 3261, SPRINGFIELD, MO 65808-3261
PO BOX 3262, SPRINGFIELD, MO 65808-3262
PO BOX 3263, SPRINGFIELD, MO 65808-3263
PO BOX 3264, SPRINGFIELD, MO 65808-3264
PO BOX 3265, SPRINGFIELD, MO 65808-3265
PO BOX 3266, SPRINGFIELD, MO 65808-3266
PO BOX 3267, SPRINGFIELD, MO 65808-3267
PO BOX 3268, SPRINGFIELD, MO 65808-3268
PO BOX 3269, SPRINGFIELD, MO 65808-3269
PO BOX 3270, SPRINGFIELD, MO 65808-3270
PO BOX 3271, SPRINGFIELD, MO 65808-3271
PO BOX 3272, SPRINGFIELD, MO 65808-3272
PO BOX 3273, SPRINGFIELD, MO 65808-3273
PO BOX 3274, SPRINGFIELD, MO 65808-3274
PO BOX 3275, SPRINGFIELD, MO 65808-3275
PO BOX 3276, SPRINGFIELD, MO 65808-3276
PO BOX 3277, SPRINGFIELD, MO 65808-3277
PO BOX 3278, SPRINGFIELD, MO 65808-3278
PO BOX 3279, SPRINGFIELD, MO 65808-3279
PO BOX 3280, SPRINGFIELD, MO 65808-3280
PO BOX 3281, SPRINGFIELD, MO 65808-3281
PO BOX 3282, SPRINGFIELD, MO 65808-3282
PO BOX 3283, SPRINGFIELD, MO 65808-3283
PO BOX 3284, SPRINGFIELD, MO 65808-3284
PO BOX 3285, SPRINGFIELD, MO 65808-3285
PO BOX 3286, SPRINGFIELD, MO 65808-3286
PO BOX 3287, SPRINGFIELD, MO 65808-3287
PO BOX 3288, SPRINGFIELD, MO 65808-3288
PO BOX 3289, SPRINGFIELD, MO 65808-3289
PO BOX 3290, SPRINGFIELD, MO 65808-3290
PO BOX 3291, SPRINGFIELD, MO 65808-3291
PO BOX 3292, SPRINGFIELD, MO 65808-3292
PO BOX 3293, SPRINGFIELD, MO 65808-3293
PO BOX 3294, SPRINGFIELD, MO 65808-3294
PO BOX 3295, SPRINGFIELD, MO 65808-3295
PO BOX 3296, SPRINGFIELD, MO 65808-3296
PO BOX 3297, SPRINGFIELD, MO 65808-3297
PO BOX 3298, SPRINGFIELD, MO 65808-3298
PO BOX 3299, SPRINGFIELD, MO 65808-3299
PO BOX 3300, SPRINGFIELD, MO 65808-3300
PO BOX 3301, SPRINGFIELD, MO 65808-3301
PO BOX 3302, SPRINGFIELD, MO 65808-3302
PO BOX 3303, SPRINGFIELD, MO 65808-3303
PO BOX 3304, SPRINGFIELD, MO 65808-3304
PO BOX 3305, SPRINGFIELD, MO 65808-3305
PO BOX 3306, SPRINGFIELD, MO 65808-3306
PO BOX 3307, SPRINGFIELD, MO 65808-3307
PO BOX 3308, SPRINGFIELD, MO 65808-3308
PO BOX 3309, SPRINGFIELD, MO 65808-3309
PO BOX 3310, SPRINGFIELD, MO 65808-3310
PO BOX 3311, SPRINGFIELD, MO 65808-3311
PO BOX 3312, SPRINGFIELD, MO 65808-3312
PO BOX 3313, SPRINGFIELD, MO 65808-3313
PO BOX 3314, SPRINGFIELD, MO 65808-3314
PO BOX 3315, SPRINGFIELD, MO 65808-3315
PO BOX 3316, SPRINGFIELD, MO 65808-3316
PO BOX 3317, SPRINGFIELD, MO 65808-3317
PO BOX 3318, SPRINGFIELD, MO 65808-3318
PO BOX 3319, SPRINGFIELD, MO 65808-3319
PO BOX 3320, SPRINGFIELD, MO 65808-3320
PO BOX 3321, SPRINGFIELD, MO 65808-3321
PO BOX 3322, SPRINGFIELD, MO 65808-3322
PO BOX 3323, SPRINGFIELD, MO 65808-3323
PO BOX 3324, SPRINGFIELD, MO 65808-3324
PO BOX 3325, SPRINGFIELD, MO 65808-3325
PO BOX 3326, SPRINGFIELD, MO 65808-3326
PO BOX 3327, SPRINGFIELD, MO 65808-3327
PO BOX 3328, SPRINGFIELD, MO 65808-3328
PO BOX 3329, SPRINGFIELD, MO 65808-3329
PO BOX 3330, SPRINGFIELD, MO 65808-3330
PO BOX 3331, SPRINGFIELD, MO 65808-3331
PO BOX 3332, SPRINGFIELD, MO 65808-3332
PO BOX 3333, SPRINGFIELD, MO 65808-3333
PO BOX 3334, SPRINGFIELD, MO 65808-3334
PO BOX 3335, SPRINGFIELD, MO 65808-3335
PO BOX 3336, SPRINGFIELD, MO 65808-3336
PO BOX 3337, SPRINGFIELD, MO 65808-3337
PO BOX 3338, SPRINGFIELD, MO 65808-3338
PO BOX 3339, SPRINGFIELD, MO 65808-3339
PO BOX 3340, SPRINGFIELD, MO 65808-3340
PO BOX 3341, SPRINGFIELD, MO 65808-3341
PO BOX 3342, SPRINGFIELD, MO 65808-3342
PO BOX 3343, SPRINGFIELD, MO 65808-3343
PO BOX 3344, SPRINGFIELD, MO 65808-3344
PO BOX 3345, SPRINGFIELD, MO 65808-3345
PO BOX 3346, SPRINGFIELD, MO 65808-3346
PO BOX 3347, SPRINGFIELD, MO 65808-3347
PO BOX 3348, SPRINGFIELD, MO 65808-3348
PO BOX 3349, SPRINGFIELD, MO 65808-3349
PO BOX 3350, SPRINGFIELD, MO 65808-3350
PO BOX 3351, SPRINGFIELD, MO 65808-3351
PO BOX 3352, SPRINGFIELD, MO 65808-3352
PO BOX 3353, SPRINGFIELD, MO 65808-3353
PO BOX 3354, SPRINGFIELD, MO 65808-3354
PO BOX 3355, SPRINGFIELD, MO 65808-3355
PO BOX 3356, SPRINGFIELD, MO 65808-3356
PO BOX 3357, SPRINGFIELD, MO 65808-3357
PO BOX 3358, SPRINGFIELD, MO 65808-3358
PO BOX 3359, SPRINGFIELD, MO 65808-3359
PO BOX 3360, SPRINGFIELD, MO 65808-3360
PO BOX 3361, SPRINGFIELD, MO 65808-3361
PO BOX 3362, SPRINGFIELD, MO 65808-3362
PO BOX 3363, SPRINGFIELD, MO 65808-3363
PO BOX 3364, SPRINGFIELD, MO 65808-3364
PO BOX 3365, SPRINGFIELD, MO 65808-3365
PO BOX 3366, SPRINGFIELD, MO 65808-3366
PO BOX 3367, SPRINGFIELD, MO 65808-3367
PO BOX 3368, SPRINGFIELD, MO 65808-3368
PO BOX 3369, SPRINGFIELD, MO 65808-3369
PO BOX 3370, SPRINGFIELD, MO 65808-3370
PO BOX 3371, SPRINGFIELD, MO 65808-3371
PO BOX 3372, SPRINGFIELD, MO 65808-3372
PO BOX 3373, SPRINGFIELD, MO 65808-3373
PO BOX 3374, SPRINGFIELD, MO 65808-3374
PO BOX 3375, SPRINGFIELD, MO 65808-3375
PO BOX 3376, SPRINGFIELD, MO 65808-3376
PO BOX 3377, SPRINGFIELD, MO 65808-3377
PO BOX 3378, SPRINGFIELD, MO 65808-3378
PO BOX 3379, SPRINGFIELD, MO 65808-3379
PO BOX 3380, SPRINGFIELD, MO 65808-3380
PO BOX 3381, SPRINGFIELD, MO 65808-3381
PO BOX 3382, SPRINGFIELD, MO 65808-3382
PO BOX 3383, SPRINGFIELD, MO 65808-3383
PO BOX 3384, SPRINGFIELD, MO 65808-3384
PO BOX 3385, SPRINGFIELD, MO 65808-3385
PO BOX 3386, SPRINGFIELD, MO 65808-3386
PO BOX 3387, SPRINGFIELD, MO 65808-3387
PO BOX 3388, SPRINGFIELD, MO 65808-3388
PO BOX 3389, SPRINGFIELD, MO 65808-3389
PO BOX 3390, SPRINGFIELD, MO 65808-3390
PO BOX 3391, SPRINGFIELD, MO 65808-3391
PO BOX 3392, SPRINGFIELD, MO 65808-3392
PO BOX 3393, SPRINGFIELD, MO 65808-3393
PO BOX 3394, SPRINGFIELD, MO 65808-3394
PO BOX 3395, SPRINGFIELD, MO 65808-3395
PO BOX 3396, SPRINGFIELD, MO 65808-3396
PO BOX 3397, SPRINGFIELD, MO 65808-3397
PO BOX 3398, SPRINGFIELD, MO 65808-3398
PO BOX 3399, SPRINGFIELD, MO 65808-3399
PO BOX 3400, SPRINGFIELD, MO 65808-3400
PO BOX 3401, SPRINGFIELD, MO 65808-3401
PO BOX 3402, SPRINGFIELD, MO 65808-3402
PO BOX 3403, SPRINGFIELD, MO 65808-3403
PO BOX 3404, SPRINGFIELD, MO 65808-3404
PO BOX 3405, SPRINGFIELD, MO 65808-3405
PO BOX 3406, SPRINGFIELD, MO 65808-3406
PO BOX 3407, SPRINGFIELD, MO 65808-3407
PO BOX 3408, SPRINGFIELD, MO 65808-3408
PO BOX 3409, SPRINGFIELD, MO 65808-3409
PO BOX 3410, SPRINGFIELD, MO 65808-3410
PO BOX 3411, SPRINGFIELD, MO 65808-3411
PO BOX 3412, SPRINGFIELD, MO 65808-3412
PO BOX 3413, SPRINGFIELD, MO 65808-3413
PO BOX 3414, SPRINGFIELD, MO 65808-3414
PO BOX 3415, SPRINGFIELD, MO 65808-3415
PO BOX 3416, SPRINGFIELD, MO 65808-3416
PO BOX 3417, SPRINGFIELD, MO 65808-3417
PO BOX 3418, SPRINGFIELD, MO 65808-3418
PO BOX 3419, SPRINGFIELD, MO 65808-3419
PO BOX 3420, SPRINGFIELD, MO 65808-3420
PO BOX 3421, SPRINGFIELD, MO 65808-3421
PO BOX 3422, SPRINGFIELD, MO 65808-3422
PO BOX 3423, SPRINGFIELD, MO 65808-3423
PO BOX 3424, SPRINGFIELD, MO 65808-3424
PO BOX 3425, SPRINGFIELD, MO 65808-3425
PO BOX 3426, SPRINGFIELD, MO 65808-3426
PO BOX 3427, SPRINGFIELD, MO 65808-3427
PO BOX 3428, SPRINGFIELD, MO 65808-3428
PO BOX 3429, SPRINGFIELD, MO 65808-3429
PO BOX 3430, SPRINGFIELD, MO 65808-3430
PO BOX 3431, SPRINGFIELD, MO 65808-3431
PO BOX 3432, SPRINGFIELD, MO 65808-3432
PO BOX 3433, SPRINGFIELD, MO 65808-3433
PO BOX 3434, SPRINGFIELD, MO 65808-3434
PO BOX 3435, SPRINGFIELD, MO 65808-3435
PO BOX 3436, SPRINGFIELD, MO 65808-3436
PO BOX 3437, SPRINGFIELD, MO 65808-3437
PO BOX 3438, SPRINGFIELD, MO 65808-3438
PO BOX 3439, SPRINGFIELD, MO 65808-3439
PO BOX 3440, SPRINGFIELD, MO 65808-3440
PO BOX 3441, SPRINGFIELD, MO 65808-3441
PO BOX 3442, SPRINGFIELD, MO 65808-3442
PO BOX 3443, SPRINGFIELD, MO 65808-3443
PO BOX 3444, SPRINGFIELD, MO 65808-3444
PO BOX 3445, SPRINGFIELD, MO 65808-3445
PO BOX 3446, SPRINGFIELD, MO 65808-3446
PO BOX 3447, SPRINGFIELD, MO 65808-3447
PO BOX 3448, SPRINGFIELD, MO 65808-3448
PO BOX 3449, SPRINGFIELD, MO 65808-3449
PO BOX 3450, SPRINGFIELD, MO 65808-3450
PO BOX 3451, SPRINGFIELD, MO 65808-3451
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