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 841, BORREGO SPRINGS, CA 92004-0841
PO BOX 842, BORREGO SPRINGS, CA 92004-0842
PO BOX 843, BORREGO SPRINGS, CA 92004-0843
PO BOX 844, BORREGO SPRINGS, CA 92004-0844
PO BOX 845, BORREGO SPRINGS, CA 92004-0845
PO BOX 846, BORREGO SPRINGS, CA 92004-0846
PO BOX 847, BORREGO SPRINGS, CA 92004-0847
PO BOX 848, BORREGO SPRINGS, CA 92004-0848
PO BOX 849, BORREGO SPRINGS, CA 92004-0849
PO BOX 850, BORREGO SPRINGS, CA 92004-0850
PO BOX 851, BORREGO SPRINGS, CA 92004-0851
PO BOX 852, BORREGO SPRINGS, CA 92004-0852
PO BOX 853, BORREGO SPRINGS, CA 92004-0853
PO BOX 854, BORREGO SPRINGS, CA 92004-0854
PO BOX 855, BORREGO SPRINGS, CA 92004-0855
PO BOX 856, BORREGO SPRINGS, CA 92004-0856
PO BOX 857, BORREGO SPRINGS, CA 92004-0857
PO BOX 858, BORREGO SPRINGS, CA 92004-0858
PO BOX 859, BORREGO SPRINGS, CA 92004-0859
PO BOX 860, BORREGO SPRINGS, CA 92004-0860
PO BOX 861, BORREGO SPRINGS, CA 92004-0861
PO BOX 862, BORREGO SPRINGS, CA 92004-0862
PO BOX 863, BORREGO SPRINGS, CA 92004-0863
PO BOX 864, BORREGO SPRINGS, CA 92004-0864
PO BOX 865, BORREGO SPRINGS, CA 92004-0865
PO BOX 866, BORREGO SPRINGS, CA 92004-0866
PO BOX 867, BORREGO SPRINGS, CA 92004-0867
PO BOX 868, BORREGO SPRINGS, CA 92004-0868
PO BOX 869, BORREGO SPRINGS, CA 92004-0869
PO BOX 870, BORREGO SPRINGS, CA 92004-0870
PO BOX 871, BORREGO SPRINGS, CA 92004-0871
PO BOX 872, BORREGO SPRINGS, CA 92004-0872
PO BOX 873, BORREGO SPRINGS, CA 92004-0873
PO BOX 874, BORREGO SPRINGS, CA 92004-0874
PO BOX 875, BORREGO SPRINGS, CA 92004-0875
PO BOX 876, BORREGO SPRINGS, CA 92004-0876
PO BOX 877, BORREGO SPRINGS, CA 92004-0877
PO BOX 878, BORREGO SPRINGS, CA 92004-0878
PO BOX 879, BORREGO SPRINGS, CA 92004-0879
PO BOX 880, BORREGO SPRINGS, CA 92004-0880
PO BOX 881, BORREGO SPRINGS, CA 92004-0881
PO BOX 882, BORREGO SPRINGS, CA 92004-0882
PO BOX 883, BORREGO SPRINGS, CA 92004-0883
PO BOX 884, BORREGO SPRINGS, CA 92004-0884
PO BOX 885, BORREGO SPRINGS, CA 92004-0885
PO BOX 886, BORREGO SPRINGS, CA 92004-0886
PO BOX 887, BORREGO SPRINGS, CA 92004-0887
PO BOX 888, BORREGO SPRINGS, CA 92004-0888
PO BOX 889, BORREGO SPRINGS, CA 92004-0889
PO BOX 890, BORREGO SPRINGS, CA 92004-0890
PO BOX 891, BORREGO SPRINGS, CA 92004-0891
PO BOX 892, BORREGO SPRINGS, CA 92004-0892
PO BOX 893, BORREGO SPRINGS, CA 92004-0893
PO BOX 894, BORREGO SPRINGS, CA 92004-0894
PO BOX 895, BORREGO SPRINGS, CA 92004-0895
PO BOX 896, BORREGO SPRINGS, CA 92004-0896
PO BOX 897, BORREGO SPRINGS, CA 92004-0897
PO BOX 898, BORREGO SPRINGS, CA 92004-0898
PO BOX 899, BORREGO SPRINGS, CA 92004-0899
PO BOX 900, BORREGO SPRINGS, CA 92004-0900
PO BOX 901, BORREGO SPRINGS, CA 92004-0901
PO BOX 902, BORREGO SPRINGS, CA 92004-0902
PO BOX 903, BORREGO SPRINGS, CA 92004-0903
PO BOX 904, BORREGO SPRINGS, CA 92004-0904
PO BOX 905, BORREGO SPRINGS, CA 92004-0905
PO BOX 906, BORREGO SPRINGS, CA 92004-0906
PO BOX 907, BORREGO SPRINGS, CA 92004-0907
PO BOX 908, BORREGO SPRINGS, CA 92004-0908
PO BOX 909, BORREGO SPRINGS, CA 92004-0909
PO BOX 910, BORREGO SPRINGS, CA 92004-0910
PO BOX 911, BORREGO SPRINGS, CA 92004-0911
PO BOX 912, BORREGO SPRINGS, CA 92004-0912
PO BOX 913, BORREGO SPRINGS, CA 92004-0913
PO BOX 914, BORREGO SPRINGS, CA 92004-0914
PO BOX 915, BORREGO SPRINGS, CA 92004-0915
PO BOX 916, BORREGO SPRINGS, CA 92004-0916
PO BOX 917, BORREGO SPRINGS, CA 92004-0917
PO BOX 918, BORREGO SPRINGS, CA 92004-0918
PO BOX 919, BORREGO SPRINGS, CA 92004-0919
PO BOX 920, BORREGO SPRINGS, CA 92004-0920
PO BOX 921, BORREGO SPRINGS, CA 92004-0921
PO BOX 922, BORREGO SPRINGS, CA 92004-0922
PO BOX 923, BORREGO SPRINGS, CA 92004-0923
PO BOX 924, BORREGO SPRINGS, CA 92004-0924
PO BOX 925, BORREGO SPRINGS, CA 92004-0925
PO BOX 926, BORREGO SPRINGS, CA 92004-0926
PO BOX 927, BORREGO SPRINGS, CA 92004-0927
PO BOX 928, BORREGO SPRINGS, CA 92004-0928
PO BOX 929, BORREGO SPRINGS, CA 92004-0929
PO BOX 930, BORREGO SPRINGS, CA 92004-0930
PO BOX 931, BORREGO SPRINGS, CA 92004-0931
PO BOX 932, BORREGO SPRINGS, CA 92004-0932
PO BOX 933, BORREGO SPRINGS, CA 92004-0933
PO BOX 934, BORREGO SPRINGS, CA 92004-0934
PO BOX 935, BORREGO SPRINGS, CA 92004-0935
PO BOX 936, BORREGO SPRINGS, CA 92004-0936
PO BOX 937, BORREGO SPRINGS, CA 92004-0937
PO BOX 938, BORREGO SPRINGS, CA 92004-0938
PO BOX 939, BORREGO SPRINGS, CA 92004-0939
PO BOX 940, BORREGO SPRINGS, CA 92004-0940
PO BOX 941, BORREGO SPRINGS, CA 92004-0941
PO BOX 942, BORREGO SPRINGS, CA 92004-0942
PO BOX 943, BORREGO SPRINGS, CA 92004-0943
PO BOX 944, BORREGO SPRINGS, CA 92004-0944
PO BOX 945, BORREGO SPRINGS, CA 92004-0945
PO BOX 946, BORREGO SPRINGS, CA 92004-0946
PO BOX 947, BORREGO SPRINGS, CA 92004-0947
PO BOX 948, BORREGO SPRINGS, CA 92004-0948
PO BOX 949, BORREGO SPRINGS, CA 92004-0949
PO BOX 950, BORREGO SPRINGS, CA 92004-0950
PO BOX 951, BORREGO SPRINGS, CA 92004-0951
PO BOX 952, BORREGO SPRINGS, CA 92004-0952
PO BOX 953, BORREGO SPRINGS, CA 92004-0953
PO BOX 954, BORREGO SPRINGS, CA 92004-0954
PO BOX 955, BORREGO SPRINGS, CA 92004-0955
PO BOX 956, BORREGO SPRINGS, CA 92004-0956
PO BOX 957, BORREGO SPRINGS, CA 92004-0957
PO BOX 958, BORREGO SPRINGS, CA 92004-0958
PO BOX 959, BORREGO SPRINGS, CA 92004-0959
PO BOX 960, BORREGO SPRINGS, CA 92004-0960
PO BOX 961, BORREGO SPRINGS, CA 92004-0961
PO BOX 962, BORREGO SPRINGS, CA 92004-0962
PO BOX 963, BORREGO SPRINGS, CA 92004-0963
PO BOX 964, BORREGO SPRINGS, CA 92004-0964
PO BOX 965, BORREGO SPRINGS, CA 92004-0965
PO BOX 966, BORREGO SPRINGS, CA 92004-0966
PO BOX 967, BORREGO SPRINGS, CA 92004-0967
PO BOX 968, BORREGO SPRINGS, CA 92004-0968
PO BOX 969, BORREGO SPRINGS, CA 92004-0969
PO BOX 970, BORREGO SPRINGS, CA 92004-0970
PO BOX 971, BORREGO SPRINGS, CA 92004-0971
PO BOX 972, BORREGO SPRINGS, CA 92004-0972
PO BOX 973, BORREGO SPRINGS, CA 92004-0973
PO BOX 974, BORREGO SPRINGS, CA 92004-0974
PO BOX 975, BORREGO SPRINGS, CA 92004-0975
PO BOX 976, BORREGO SPRINGS, CA 92004-0976
PO BOX 977, BORREGO SPRINGS, CA 92004-0977
PO BOX 978, BORREGO SPRINGS, CA 92004-0978
PO BOX 979, BORREGO SPRINGS, CA 92004-0979
PO BOX 980, BORREGO SPRINGS, CA 92004-0980
PO BOX 981, BORREGO SPRINGS, CA 92004-0981
PO BOX 982, BORREGO SPRINGS, CA 92004-0982
PO BOX 983, BORREGO SPRINGS, CA 92004-0983
PO BOX 984, BORREGO SPRINGS, CA 92004-0984
PO BOX 985, BORREGO SPRINGS, CA 92004-0985
PO BOX 986, BORREGO SPRINGS, CA 92004-0986
PO BOX 987, BORREGO SPRINGS, CA 92004-0987
PO BOX 988, BORREGO SPRINGS, CA 92004-0988
PO BOX 989, BORREGO SPRINGS, CA 92004-0989
PO BOX 990, BORREGO SPRINGS, CA 92004-0990
PO BOX 991, BORREGO SPRINGS, CA 92004-0991
PO BOX 992, BORREGO SPRINGS, CA 92004-0992
PO BOX 993, BORREGO SPRINGS, CA 92004-0993
PO BOX 994, BORREGO SPRINGS, CA 92004-0994
PO BOX 995, BORREGO SPRINGS, CA 92004-0995
PO BOX 996, BORREGO SPRINGS, CA 92004-0996
PO BOX 997, BORREGO SPRINGS, CA 92004-0997
PO BOX 998, BORREGO SPRINGS, CA 92004-0998
PO BOX 999, BORREGO SPRINGS, CA 92004-0999
PO BOX 1000, BORREGO SPRINGS, CA 92004-1000
PO BOX 1001, BORREGO SPRINGS, CA 92004-1001
PO BOX 1002, BORREGO SPRINGS, CA 92004-1002
PO BOX 1003, BORREGO SPRINGS, CA 92004-1003
PO BOX 1004, BORREGO SPRINGS, CA 92004-1004
PO BOX 1005, BORREGO SPRINGS, CA 92004-1005
PO BOX 1006, BORREGO SPRINGS, CA 92004-1006
PO BOX 1007, BORREGO SPRINGS, CA 92004-1007
PO BOX 1008, BORREGO SPRINGS, CA 92004-1008
PO BOX 1009, BORREGO SPRINGS, CA 92004-1009
PO BOX 1010, BORREGO SPRINGS, CA 92004-1010
PO BOX 1011, BORREGO SPRINGS, CA 92004-1011
PO BOX 1012, BORREGO SPRINGS, CA 92004-1012
PO BOX 1013, BORREGO SPRINGS, CA 92004-1013
PO BOX 1014, BORREGO SPRINGS, CA 92004-1014
PO BOX 1015, BORREGO SPRINGS, CA 92004-1015
PO BOX 1016, BORREGO SPRINGS, CA 92004-1016
PO BOX 1017, BORREGO SPRINGS, CA 92004-1017
PO BOX 1018, BORREGO SPRINGS, CA 92004-1018
PO BOX 1019, BORREGO SPRINGS, CA 92004-1019
PO BOX 1020, BORREGO SPRINGS, CA 92004-1020
PO BOX 1021, BORREGO SPRINGS, CA 92004-1021
PO BOX 1022, BORREGO SPRINGS, CA 92004-1022
PO BOX 1023, BORREGO SPRINGS, CA 92004-1023
PO BOX 1024, BORREGO SPRINGS, CA 92004-1024
PO BOX 1025, BORREGO SPRINGS, CA 92004-1025
PO BOX 1026, BORREGO SPRINGS, CA 92004-1026
PO BOX 1027, BORREGO SPRINGS, CA 92004-1027
PO BOX 1028, BORREGO SPRINGS, CA 92004-1028
PO BOX 1029, BORREGO SPRINGS, CA 92004-1029
PO BOX 1030, BORREGO SPRINGS, CA 92004-1030
PO BOX 1031, BORREGO SPRINGS, CA 92004-1031
PO BOX 1032, BORREGO SPRINGS, CA 92004-1032
PO BOX 1033, BORREGO SPRINGS, CA 92004-1033
PO BOX 1034, BORREGO SPRINGS, CA 92004-1034
PO BOX 1035, BORREGO SPRINGS, CA 92004-1035
PO BOX 1036, BORREGO SPRINGS, CA 92004-1036
PO BOX 1037, BORREGO SPRINGS, CA 92004-1037
PO BOX 1038, BORREGO SPRINGS, CA 92004-1038
PO BOX 1039, BORREGO SPRINGS, CA 92004-1039
PO BOX 1040, BORREGO SPRINGS, CA 92004-1040
PO BOX 1041, BORREGO SPRINGS, CA 92004-1041
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