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 278830, ROCHESTER, NY 14627-8830
PO BOX 278831, ROCHESTER, NY 14627-8831
PO BOX 278832, ROCHESTER, NY 14627-8832
PO BOX 278833, ROCHESTER, NY 14627-8833
PO BOX 278834, ROCHESTER, NY 14627-8834
PO BOX 278835, ROCHESTER, NY 14627-8835
PO BOX 278836, ROCHESTER, NY 14627-8836
PO BOX 278837, ROCHESTER, NY 14627-8837
PO BOX 278838, ROCHESTER, NY 14627-8838
PO BOX 278839, ROCHESTER, NY 14627-8839
PO BOX 278840, ROCHESTER, NY 14627-8840
PO BOX 278841, ROCHESTER, NY 14627-8841
PO BOX 278842, ROCHESTER, NY 14627-8842
PO BOX 278843, ROCHESTER, NY 14627-8843
PO BOX 278844, ROCHESTER, NY 14627-8844
PO BOX 278845, ROCHESTER, NY 14627-8845
PO BOX 278846, ROCHESTER, NY 14627-8846
PO BOX 278847, ROCHESTER, NY 14627-8847
PO BOX 278848, ROCHESTER, NY 14627-8848
PO BOX 278849, ROCHESTER, NY 14627-8849
PO BOX 278850, ROCHESTER, NY 14627-8850
PO BOX 278851, ROCHESTER, NY 14627-8851
PO BOX 278852, ROCHESTER, NY 14627-8852
PO BOX 278853, ROCHESTER, NY 14627-8853
PO BOX 278854, ROCHESTER, NY 14627-8854
PO BOX 278855, ROCHESTER, NY 14627-8855
PO BOX 278856, ROCHESTER, NY 14627-8856
PO BOX 278857, ROCHESTER, NY 14627-8857
PO BOX 278858, ROCHESTER, NY 14627-8858
PO BOX 278859, ROCHESTER, NY 14627-8859
PO BOX 278860, ROCHESTER, NY 14627-8860
PO BOX 278861, ROCHESTER, NY 14627-8861
PO BOX 278862, ROCHESTER, NY 14627-8862
PO BOX 278863, ROCHESTER, NY 14627-8863
PO BOX 278864, ROCHESTER, NY 14627-8864
PO BOX 278865, ROCHESTER, NY 14627-8865
PO BOX 278866, ROCHESTER, NY 14627-8866
PO BOX 278867, ROCHESTER, NY 14627-8867
PO BOX 278868, ROCHESTER, NY 14627-8868
PO BOX 278869, ROCHESTER, NY 14627-8869
PO BOX 278870, ROCHESTER, NY 14627-8870
PO BOX 278871, ROCHESTER, NY 14627-8871
PO BOX 278872, ROCHESTER, NY 14627-8872
PO BOX 278873, ROCHESTER, NY 14627-8873
PO BOX 278874, ROCHESTER, NY 14627-8874
PO BOX 278875, ROCHESTER, NY 14627-8875
PO BOX 278876, ROCHESTER, NY 14627-8876
PO BOX 278877, ROCHESTER, NY 14627-8877
PO BOX 278878, ROCHESTER, NY 14627-8878
PO BOX 278879, ROCHESTER, NY 14627-8879
PO BOX 278880, ROCHESTER, NY 14627-8880
PO BOX 278881, ROCHESTER, NY 14627-8881
PO BOX 278882, ROCHESTER, NY 14627-8882
PO BOX 278883, ROCHESTER, NY 14627-8883
PO BOX 278884, ROCHESTER, NY 14627-8884
PO BOX 278885, ROCHESTER, NY 14627-8885
PO BOX 278886, ROCHESTER, NY 14627-8886
PO BOX 278887, ROCHESTER, NY 14627-8887
PO BOX 278888, ROCHESTER, NY 14627-8888
PO BOX 278889, ROCHESTER, NY 14627-8889
PO BOX 278890, ROCHESTER, NY 14627-8890
PO BOX 278891, ROCHESTER, NY 14627-8891
PO BOX 278892, ROCHESTER, NY 14627-8892
PO BOX 278893, ROCHESTER, NY 14627-8893
PO BOX 278894, ROCHESTER, NY 14627-8894
PO BOX 278895, ROCHESTER, NY 14627-8895
PO BOX 278896, ROCHESTER, NY 14627-8896
PO BOX 278897, ROCHESTER, NY 14627-8897
PO BOX 278898, ROCHESTER, NY 14627-8898
PO BOX 278899, ROCHESTER, NY 14627-8899
PO BOX 278900, ROCHESTER, NY 14627-8900
PO BOX 278901, ROCHESTER, NY 14627-8901
PO BOX 278902, ROCHESTER, NY 14627-8902
PO BOX 278903, ROCHESTER, NY 14627-8903
PO BOX 278904, ROCHESTER, NY 14627-8904
PO BOX 278905, ROCHESTER, NY 14627-8905
PO BOX 278906, ROCHESTER, NY 14627-8906
PO BOX 278907, ROCHESTER, NY 14627-8907
PO BOX 278908, ROCHESTER, NY 14627-8908
PO BOX 278909, ROCHESTER, NY 14627-8909
PO BOX 278910, ROCHESTER, NY 14627-8910
PO BOX 278911, ROCHESTER, NY 14627-8911
PO BOX 278912, ROCHESTER, NY 14627-8912
PO BOX 278913, ROCHESTER, NY 14627-8913
PO BOX 278914, ROCHESTER, NY 14627-8914
PO BOX 278915, ROCHESTER, NY 14627-8915
PO BOX 278916, ROCHESTER, NY 14627-8916
PO BOX 278917, ROCHESTER, NY 14627-8917
PO BOX 278918, ROCHESTER, NY 14627-8918
PO BOX 278919, ROCHESTER, NY 14627-8919
PO BOX 278920, ROCHESTER, NY 14627-8920
PO BOX 278921, ROCHESTER, NY 14627-8921
PO BOX 278922, ROCHESTER, NY 14627-8922
PO BOX 278923, ROCHESTER, NY 14627-8923
PO BOX 278924, ROCHESTER, NY 14627-8924
PO BOX 278925, ROCHESTER, NY 14627-8925
PO BOX 278926, ROCHESTER, NY 14627-8926
PO BOX 278927, ROCHESTER, NY 14627-8927
PO BOX 278928, ROCHESTER, NY 14627-8928
PO BOX 278929, ROCHESTER, NY 14627-8929
PO BOX 278930, ROCHESTER, NY 14627-8930
PO BOX 278931, ROCHESTER, NY 14627-8931
PO BOX 278932, ROCHESTER, NY 14627-8932
PO BOX 278933, ROCHESTER, NY 14627-8933
PO BOX 278934, ROCHESTER, NY 14627-8934
PO BOX 278935, ROCHESTER, NY 14627-8935
PO BOX 278936, ROCHESTER, NY 14627-8936
PO BOX 278937, ROCHESTER, NY 14627-8937
PO BOX 278938, ROCHESTER, NY 14627-8938
PO BOX 278939, ROCHESTER, NY 14627-8939
PO BOX 278940, ROCHESTER, NY 14627-8940
PO BOX 278941, ROCHESTER, NY 14627-8941
PO BOX 278942, ROCHESTER, NY 14627-8942
PO BOX 278943, ROCHESTER, NY 14627-8943
PO BOX 278944, ROCHESTER, NY 14627-8944
PO BOX 278945, ROCHESTER, NY 14627-8945
PO BOX 278946, ROCHESTER, NY 14627-8946
PO BOX 278947, ROCHESTER, NY 14627-8947
PO BOX 278948, ROCHESTER, NY 14627-8948
PO BOX 278949, ROCHESTER, NY 14627-8949
PO BOX 278950, ROCHESTER, NY 14627-8950
PO BOX 278951, ROCHESTER, NY 14627-8951
PO BOX 278952, ROCHESTER, NY 14627-8952
PO BOX 278953, ROCHESTER, NY 14627-8953
PO BOX 278954, ROCHESTER, NY 14627-8954
PO BOX 278955, ROCHESTER, NY 14627-8955
PO BOX 278956, ROCHESTER, NY 14627-8956
PO BOX 278957, ROCHESTER, NY 14627-8957
PO BOX 278958, ROCHESTER, NY 14627-8958
PO BOX 278959, ROCHESTER, NY 14627-8959
PO BOX 278960, ROCHESTER, NY 14627-8960
PO BOX 278961, ROCHESTER, NY 14627-8961
PO BOX 278962, ROCHESTER, NY 14627-8962
PO BOX 278963, ROCHESTER, NY 14627-8963
PO BOX 278964, ROCHESTER, NY 14627-8964
PO BOX 278965, ROCHESTER, NY 14627-8965
PO BOX 278966, ROCHESTER, NY 14627-8966
PO BOX 278967, ROCHESTER, NY 14627-8967
PO BOX 278968, ROCHESTER, NY 14627-8968
PO BOX 278969, ROCHESTER, NY 14627-8969
PO BOX 278970, ROCHESTER, NY 14627-8970
PO BOX 278971, ROCHESTER, NY 14627-8971
PO BOX 278972, ROCHESTER, NY 14627-8972
PO BOX 278973, ROCHESTER, NY 14627-8973
PO BOX 278974, ROCHESTER, NY 14627-8974
PO BOX 278975, ROCHESTER, NY 14627-8975
PO BOX 278976, ROCHESTER, NY 14627-8976
PO BOX 278977, ROCHESTER, NY 14627-8977
PO BOX 278978, ROCHESTER, NY 14627-8978
PO BOX 278979, ROCHESTER, NY 14627-8979
PO BOX 278980, ROCHESTER, NY 14627-8980
PO BOX 278981, ROCHESTER, NY 14627-8981
PO BOX 278982, ROCHESTER, NY 14627-8982
PO BOX 278983, ROCHESTER, NY 14627-8983
PO BOX 278984, ROCHESTER, NY 14627-8984
PO BOX 278985, ROCHESTER, NY 14627-8985
PO BOX 278986, ROCHESTER, NY 14627-8986
PO BOX 278987, ROCHESTER, NY 14627-8987
PO BOX 278988, ROCHESTER, NY 14627-8988
PO BOX 278989, ROCHESTER, NY 14627-8989
PO BOX 278990, ROCHESTER, NY 14627-8990
PO BOX 278991, ROCHESTER, NY 14627-8991
PO BOX 278992, ROCHESTER, NY 14627-8992
PO BOX 278993, ROCHESTER, NY 14627-8993
PO BOX 278994, ROCHESTER, NY 14627-8994
PO BOX 278995, ROCHESTER, NY 14627-8995
PO BOX 278996, ROCHESTER, NY 14627-8996
PO BOX 278997, ROCHESTER, NY 14627-8997
PO BOX 278998, ROCHESTER, NY 14627-8998
PO BOX 278999, ROCHESTER, NY 14627-8999
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