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 9241, CANOGA PARK, CA 91309-0241
PO BOX 9242, CANOGA PARK, CA 91309-0242
PO BOX 9243, CANOGA PARK, CA 91309-0243
PO BOX 9244, CANOGA PARK, CA 91309-0244
PO BOX 9245, CANOGA PARK, CA 91309-0245
PO BOX 9246, CANOGA PARK, CA 91309-0246
PO BOX 9247, CANOGA PARK, CA 91309-0247
PO BOX 9248, CANOGA PARK, CA 91309-0248
PO BOX 9249, CANOGA PARK, CA 91309-0249
PO BOX 9250, CANOGA PARK, CA 91309-0250
PO BOX 9251, CANOGA PARK, CA 91309-0251
PO BOX 9252, CANOGA PARK, CA 91309-0252
PO BOX 9253, CANOGA PARK, CA 91309-0253
PO BOX 9254, CANOGA PARK, CA 91309-0254
PO BOX 9255, CANOGA PARK, CA 91309-0255
PO BOX 9256, CANOGA PARK, CA 91309-0256
PO BOX 9257, CANOGA PARK, CA 91309-0257
PO BOX 9258, CANOGA PARK, CA 91309-0258
PO BOX 9259, CANOGA PARK, CA 91309-0259
PO BOX 9260, CANOGA PARK, CA 91309-0260
PO BOX 9261, CANOGA PARK, CA 91309-0261
PO BOX 9262, CANOGA PARK, CA 91309-0262
PO BOX 9263, CANOGA PARK, CA 91309-0263
PO BOX 9264, CANOGA PARK, CA 91309-0264
PO BOX 9265, CANOGA PARK, CA 91309-0265
PO BOX 9266, CANOGA PARK, CA 91309-0266
PO BOX 9267, CANOGA PARK, CA 91309-0267
PO BOX 9268, CANOGA PARK, CA 91309-0268
PO BOX 9269, CANOGA PARK, CA 91309-0269
PO BOX 9270, CANOGA PARK, CA 91309-0270
PO BOX 9271, CANOGA PARK, CA 91309-0271
PO BOX 9272, CANOGA PARK, CA 91309-0272
PO BOX 9273, CANOGA PARK, CA 91309-0273
PO BOX 9274, CANOGA PARK, CA 91309-0274
PO BOX 9275, CANOGA PARK, CA 91309-0275
PO BOX 9276, CANOGA PARK, CA 91309-0276
PO BOX 9277, CANOGA PARK, CA 91309-0277
PO BOX 9278, CANOGA PARK, CA 91309-0278
PO BOX 9279, CANOGA PARK, CA 91309-0279
PO BOX 9280, CANOGA PARK, CA 91309-0280
PO BOX 9281, CANOGA PARK, CA 91309-0281
PO BOX 9282, CANOGA PARK, CA 91309-0282
PO BOX 9283, CANOGA PARK, CA 91309-0283
PO BOX 9284, CANOGA PARK, CA 91309-0284
PO BOX 9285, CANOGA PARK, CA 91309-0285
PO BOX 9286, CANOGA PARK, CA 91309-0286
PO BOX 9287, CANOGA PARK, CA 91309-0287
PO BOX 9288, CANOGA PARK, CA 91309-0288
PO BOX 9289, CANOGA PARK, CA 91309-0289
PO BOX 9290, CANOGA PARK, CA 91309-0290
PO BOX 9291, CANOGA PARK, CA 91309-0291
PO BOX 9292, CANOGA PARK, CA 91309-0292
PO BOX 9293, CANOGA PARK, CA 91309-0293
PO BOX 9294, CANOGA PARK, CA 91309-0294
PO BOX 9295, CANOGA PARK, CA 91309-0295
PO BOX 9296, CANOGA PARK, CA 91309-0296
PO BOX 9297, CANOGA PARK, CA 91309-0297
PO BOX 9298, CANOGA PARK, CA 91309-0298
PO BOX 9299, CANOGA PARK, CA 91309-0299
PO BOX 9300, CANOGA PARK, CA 91309-0300
PO BOX 9301, CANOGA PARK, CA 91309-0301
PO BOX 9302, CANOGA PARK, CA 91309-0302
PO BOX 9303, CANOGA PARK, CA 91309-0303
PO BOX 9304, CANOGA PARK, CA 91309-0304
PO BOX 9305, CANOGA PARK, CA 91309-0305
PO BOX 9306, CANOGA PARK, CA 91309-0306
PO BOX 9307, CANOGA PARK, CA 91309-0307
PO BOX 9308, CANOGA PARK, CA 91309-0308
PO BOX 9309, CANOGA PARK, CA 91309-0309
PO BOX 9310, CANOGA PARK, CA 91309-0310
PO BOX 9311, CANOGA PARK, CA 91309-0311
PO BOX 9312, CANOGA PARK, CA 91309-0312
PO BOX 9313, CANOGA PARK, CA 91309-0313
PO BOX 9314, CANOGA PARK, CA 91309-0314
PO BOX 9315, CANOGA PARK, CA 91309-0315
PO BOX 9316, CANOGA PARK, CA 91309-0316
PO BOX 9317, CANOGA PARK, CA 91309-0317
PO BOX 9318, CANOGA PARK, CA 91309-0318
PO BOX 9319, CANOGA PARK, CA 91309-0319
PO BOX 9320, CANOGA PARK, CA 91309-0320
PO BOX 9321, CANOGA PARK, CA 91309-0321
PO BOX 9322, CANOGA PARK, CA 91309-0322
PO BOX 9323, CANOGA PARK, CA 91309-0323
PO BOX 9324, CANOGA PARK, CA 91309-0324
PO BOX 9325, CANOGA PARK, CA 91309-0325
PO BOX 9326, CANOGA PARK, CA 91309-0326
PO BOX 9327, CANOGA PARK, CA 91309-0327
PO BOX 9328, CANOGA PARK, CA 91309-0328
PO BOX 9329, CANOGA PARK, CA 91309-0329
PO BOX 9330, CANOGA PARK, CA 91309-0330
PO BOX 9331, CANOGA PARK, CA 91309-0331
PO BOX 9332, CANOGA PARK, CA 91309-0332
PO BOX 9333, CANOGA PARK, CA 91309-0333
PO BOX 9334, CANOGA PARK, CA 91309-0334
PO BOX 9335, CANOGA PARK, CA 91309-0335
PO BOX 9336, CANOGA PARK, CA 91309-0336
PO BOX 9337, CANOGA PARK, CA 91309-0337
PO BOX 9338, CANOGA PARK, CA 91309-0338
PO BOX 9339, CANOGA PARK, CA 91309-0339
PO BOX 9340, CANOGA PARK, CA 91309-0340
PO BOX 9341, CANOGA PARK, CA 91309-0341
PO BOX 9342, CANOGA PARK, CA 91309-0342
PO BOX 9343, CANOGA PARK, CA 91309-0343
PO BOX 9344, CANOGA PARK, CA 91309-0344
PO BOX 9345, CANOGA PARK, CA 91309-0345
PO BOX 9346, CANOGA PARK, CA 91309-0346
PO BOX 9347, CANOGA PARK, CA 91309-0347
PO BOX 9348, CANOGA PARK, CA 91309-0348
PO BOX 9349, CANOGA PARK, CA 91309-0349
PO BOX 9350, CANOGA PARK, CA 91309-0350
PO BOX 9351, CANOGA PARK, CA 91309-0351
PO BOX 9352, CANOGA PARK, CA 91309-0352
PO BOX 9353, CANOGA PARK, CA 91309-0353
PO BOX 9354, CANOGA PARK, CA 91309-0354
PO BOX 9355, CANOGA PARK, CA 91309-0355
PO BOX 9356, CANOGA PARK, CA 91309-0356
PO BOX 9357, CANOGA PARK, CA 91309-0357
PO BOX 9358, CANOGA PARK, CA 91309-0358
PO BOX 9359, CANOGA PARK, CA 91309-0359
PO BOX 9360, CANOGA PARK, CA 91309-0360
PO BOX 9361, CANOGA PARK, CA 91309-0361
PO BOX 9362, CANOGA PARK, CA 91309-0362
PO BOX 9363, CANOGA PARK, CA 91309-0363
PO BOX 9364, CANOGA PARK, CA 91309-0364
PO BOX 9365, CANOGA PARK, CA 91309-0365
PO BOX 9366, CANOGA PARK, CA 91309-0366
PO BOX 9367, CANOGA PARK, CA 91309-0367
PO BOX 9368, CANOGA PARK, CA 91309-0368
PO BOX 9369, CANOGA PARK, CA 91309-0369
PO BOX 9370, CANOGA PARK, CA 91309-0370
PO BOX 9371, CANOGA PARK, CA 91309-0371
PO BOX 9372, CANOGA PARK, CA 91309-0372
PO BOX 9373, CANOGA PARK, CA 91309-0373
PO BOX 9374, CANOGA PARK, CA 91309-0374
PO BOX 9375, CANOGA PARK, CA 91309-0375
PO BOX 9376, CANOGA PARK, CA 91309-0376
PO BOX 9377, CANOGA PARK, CA 91309-0377
PO BOX 9378, CANOGA PARK, CA 91309-0378
PO BOX 9379, CANOGA PARK, CA 91309-0379
PO BOX 9380, CANOGA PARK, CA 91309-0380
PO BOX 9381, CANOGA PARK, CA 91309-0381
PO BOX 9382, CANOGA PARK, CA 91309-0382
PO BOX 9383, CANOGA PARK, CA 91309-0383
PO BOX 9384, CANOGA PARK, CA 91309-0384
PO BOX 9385, CANOGA PARK, CA 91309-0385
PO BOX 9386, CANOGA PARK, CA 91309-0386
PO BOX 9387, CANOGA PARK, CA 91309-0387
PO BOX 9388, CANOGA PARK, CA 91309-0388
PO BOX 9389, CANOGA PARK, CA 91309-0389
PO BOX 9390, CANOGA PARK, CA 91309-0390
PO BOX 9391, CANOGA PARK, CA 91309-0391
PO BOX 9392, CANOGA PARK, CA 91309-0392
PO BOX 9393, CANOGA PARK, CA 91309-0393
PO BOX 9394, CANOGA PARK, CA 91309-0394
PO BOX 9395, CANOGA PARK, CA 91309-0395
PO BOX 9396, CANOGA PARK, CA 91309-0396
PO BOX 9397, CANOGA PARK, CA 91309-0397
PO BOX 9398, CANOGA PARK, CA 91309-0398
PO BOX 9399, CANOGA PARK, CA 91309-0399
PO BOX 9400, CANOGA PARK, CA 91309-0400
PO BOX 9401, CANOGA PARK, CA 91309-0401
PO BOX 9402, CANOGA PARK, CA 91309-0402
PO BOX 9403, CANOGA PARK, CA 91309-0403
PO BOX 9404, CANOGA PARK, CA 91309-0404
PO BOX 9405, CANOGA PARK, CA 91309-0405
PO BOX 9406, CANOGA PARK, CA 91309-0406
PO BOX 9407, CANOGA PARK, CA 91309-0407
PO BOX 9408, CANOGA PARK, CA 91309-0408
PO BOX 9409, CANOGA PARK, CA 91309-0409
PO BOX 9410, CANOGA PARK, CA 91309-0410
PO BOX 9411, CANOGA PARK, CA 91309-0411
PO BOX 9412, CANOGA PARK, CA 91309-0412
PO BOX 9413, CANOGA PARK, CA 91309-0413
PO BOX 9414, CANOGA PARK, CA 91309-0414
PO BOX 9415, CANOGA PARK, CA 91309-0415
PO BOX 9416, CANOGA PARK, CA 91309-0416
PO BOX 9417, CANOGA PARK, CA 91309-0417
PO BOX 9418, CANOGA PARK, CA 91309-0418
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