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 961, GLENDALE, AZ 85311-0961
PO BOX 962, GLENDALE, AZ 85311-0962
PO BOX 963, GLENDALE, AZ 85311-0963
PO BOX 964, GLENDALE, AZ 85311-0964
PO BOX 965, GLENDALE, AZ 85311-0965
PO BOX 966, GLENDALE, AZ 85311-0966
PO BOX 967, GLENDALE, AZ 85311-0967
PO BOX 968, GLENDALE, AZ 85311-0968
PO BOX 969, GLENDALE, AZ 85311-0969
PO BOX 970, GLENDALE, AZ 85311-0970
PO BOX 971, GLENDALE, AZ 85311-0971
PO BOX 972, GLENDALE, AZ 85311-0972
PO BOX 973, GLENDALE, AZ 85311-0973
PO BOX 974, GLENDALE, AZ 85311-0974
PO BOX 975, GLENDALE, AZ 85311-0975
PO BOX 976, GLENDALE, AZ 85311-0976
PO BOX 977, GLENDALE, AZ 85311-0977
PO BOX 978, GLENDALE, AZ 85311-0978
PO BOX 979, GLENDALE, AZ 85311-0979
PO BOX 980, GLENDALE, AZ 85311-0980
PO BOX 981, GLENDALE, AZ 85311-0981
PO BOX 982, GLENDALE, AZ 85311-0982
PO BOX 983, GLENDALE, AZ 85311-0983
PO BOX 984, GLENDALE, AZ 85311-0984
PO BOX 985, GLENDALE, AZ 85311-0985
PO BOX 986, GLENDALE, AZ 85311-0986
PO BOX 987, GLENDALE, AZ 85311-0987
PO BOX 988, GLENDALE, AZ 85311-0988
PO BOX 989, GLENDALE, AZ 85311-0989
PO BOX 990, GLENDALE, AZ 85311-0990
PO BOX 991, GLENDALE, AZ 85311-0991
PO BOX 992, GLENDALE, AZ 85311-0992
PO BOX 993, GLENDALE, AZ 85311-0993
PO BOX 994, GLENDALE, AZ 85311-0994
PO BOX 995, GLENDALE, AZ 85311-0995
PO BOX 996, GLENDALE, AZ 85311-0996
PO BOX 997, GLENDALE, AZ 85311-0997
PO BOX 998, GLENDALE, AZ 85311-0998
PO BOX 999, GLENDALE, AZ 85311-0999
PO BOX 1000, GLENDALE, AZ 85311-1000
PO BOX 1001, GLENDALE, AZ 85311-1001
PO BOX 1002, GLENDALE, AZ 85311-1002
PO BOX 1003, GLENDALE, AZ 85311-1003
PO BOX 1004, GLENDALE, AZ 85311-1004
PO BOX 1005, GLENDALE, AZ 85311-1005
PO BOX 1006, GLENDALE, AZ 85311-1006
PO BOX 1007, GLENDALE, AZ 85311-1007
PO BOX 1008, GLENDALE, AZ 85311-1008
PO BOX 1009, GLENDALE, AZ 85311-1009
PO BOX 1010, GLENDALE, AZ 85311-1010
PO BOX 1011, GLENDALE, AZ 85311-1011
PO BOX 1012, GLENDALE, AZ 85311-1012
PO BOX 1013, GLENDALE, AZ 85311-1013
PO BOX 1014, GLENDALE, AZ 85311-1014
PO BOX 1015, GLENDALE, AZ 85311-1015
PO BOX 1016, GLENDALE, AZ 85311-1016
PO BOX 1017, GLENDALE, AZ 85311-1017
PO BOX 1018, GLENDALE, AZ 85311-1018
PO BOX 1019, GLENDALE, AZ 85311-1019
PO BOX 1020, GLENDALE, AZ 85311-1020
PO BOX 1021, GLENDALE, AZ 85311-1021
PO BOX 1022, GLENDALE, AZ 85311-1022
PO BOX 1023, GLENDALE, AZ 85311-1023
PO BOX 1024, GLENDALE, AZ 85311-1024
PO BOX 1025, GLENDALE, AZ 85311-1025
PO BOX 1026, GLENDALE, AZ 85311-1026
PO BOX 1027, GLENDALE, AZ 85311-1027
PO BOX 1028, GLENDALE, AZ 85311-1028
PO BOX 1029, GLENDALE, AZ 85311-1029
PO BOX 1030, GLENDALE, AZ 85311-1030
PO BOX 1031, GLENDALE, AZ 85311-1031
PO BOX 1032, GLENDALE, AZ 85311-1032
PO BOX 1033, GLENDALE, AZ 85311-1033
PO BOX 1034, GLENDALE, AZ 85311-1034
PO BOX 1035, GLENDALE, AZ 85311-1035
PO BOX 1036, GLENDALE, AZ 85311-1036
PO BOX 1037, GLENDALE, AZ 85311-1037
PO BOX 1038, GLENDALE, AZ 85311-1038
PO BOX 1039, GLENDALE, AZ 85311-1039
PO BOX 1040, GLENDALE, AZ 85311-1040
PO BOX 1041, GLENDALE, AZ 85311-1041
PO BOX 1042, GLENDALE, AZ 85311-1042
PO BOX 1043, GLENDALE, AZ 85311-1043
PO BOX 1044, GLENDALE, AZ 85311-1044
PO BOX 1045, GLENDALE, AZ 85311-1045
PO BOX 1046, GLENDALE, AZ 85311-1046
PO BOX 1047, GLENDALE, AZ 85311-1047
PO BOX 1048, GLENDALE, AZ 85311-1048
PO BOX 1049, GLENDALE, AZ 85311-1049
PO BOX 1050, GLENDALE, AZ 85311-1050
PO BOX 1051, GLENDALE, AZ 85311-1051
PO BOX 1052, GLENDALE, AZ 85311-1052
PO BOX 1053, GLENDALE, AZ 85311-1053
PO BOX 1054, GLENDALE, AZ 85311-1054
PO BOX 1055, GLENDALE, AZ 85311-1055
PO BOX 1056, GLENDALE, AZ 85311-1056
PO BOX 1057, GLENDALE, AZ 85311-1057
PO BOX 1058, GLENDALE, AZ 85311-1058
PO BOX 1059, GLENDALE, AZ 85311-1059
PO BOX 1060, GLENDALE, AZ 85311-1060
PO BOX 1061, GLENDALE, AZ 85311-1061
PO BOX 1062, GLENDALE, AZ 85311-1062
PO BOX 1063, GLENDALE, AZ 85311-1063
PO BOX 1064, GLENDALE, AZ 85311-1064
PO BOX 1065, GLENDALE, AZ 85311-1065
PO BOX 1066, GLENDALE, AZ 85311-1066
PO BOX 1067, GLENDALE, AZ 85311-1067
PO BOX 1068, GLENDALE, AZ 85311-1068
PO BOX 1069, GLENDALE, AZ 85311-1069
PO BOX 1070, GLENDALE, AZ 85311-1070
PO BOX 1071, GLENDALE, AZ 85311-1071
PO BOX 1072, GLENDALE, AZ 85311-1072
PO BOX 1073, GLENDALE, AZ 85311-1073
PO BOX 1074, GLENDALE, AZ 85311-1074
PO BOX 1075, GLENDALE, AZ 85311-1075
PO BOX 1076, GLENDALE, AZ 85311-1076
PO BOX 1077, GLENDALE, AZ 85311-1077
PO BOX 1078, GLENDALE, AZ 85311-1078
PO BOX 1079, GLENDALE, AZ 85311-1079
PO BOX 1080, GLENDALE, AZ 85311-1080
PO BOX 1081, GLENDALE, AZ 85311-1081
PO BOX 1082, GLENDALE, AZ 85311-1082
PO BOX 1083, GLENDALE, AZ 85311-1083
PO BOX 1084, GLENDALE, AZ 85311-1084
PO BOX 1085, GLENDALE, AZ 85311-1085
PO BOX 1086, GLENDALE, AZ 85311-1086
PO BOX 1087, GLENDALE, AZ 85311-1087
PO BOX 1088, GLENDALE, AZ 85311-1088
PO BOX 1089, GLENDALE, AZ 85311-1089
PO BOX 1090, GLENDALE, AZ 85311-1090
PO BOX 1091, GLENDALE, AZ 85311-1091
PO BOX 1092, GLENDALE, AZ 85311-1092
PO BOX 1093, GLENDALE, AZ 85311-1093
PO BOX 1094, GLENDALE, AZ 85311-1094
PO BOX 1095, GLENDALE, AZ 85311-1095
PO BOX 1096, GLENDALE, AZ 85311-1096
PO BOX 1097, GLENDALE, AZ 85311-1097
PO BOX 1098, GLENDALE, AZ 85311-1098
PO BOX 1099, GLENDALE, AZ 85311-1099
PO BOX 1100, GLENDALE, AZ 85311-1100
PO BOX 1101, GLENDALE, AZ 85311-1101
PO BOX 1102, GLENDALE, AZ 85311-1102
PO BOX 1103, GLENDALE, AZ 85311-1103
PO BOX 1104, GLENDALE, AZ 85311-1104
PO BOX 1105, GLENDALE, AZ 85311-1105
PO BOX 1106, GLENDALE, AZ 85311-1106
PO BOX 1107, GLENDALE, AZ 85311-1107
PO BOX 1108, GLENDALE, AZ 85311-1108
PO BOX 1109, GLENDALE, AZ 85311-1109
PO BOX 1110, GLENDALE, AZ 85311-1110
PO BOX 1111, GLENDALE, AZ 85311-1111
PO BOX 1112, GLENDALE, AZ 85311-1112
PO BOX 1113, GLENDALE, AZ 85311-1113
PO BOX 1114, GLENDALE, AZ 85311-1114
PO BOX 1115, GLENDALE, AZ 85311-1115
PO BOX 1116, GLENDALE, AZ 85311-1116
PO BOX 1117, GLENDALE, AZ 85311-1117
PO BOX 1118, GLENDALE, AZ 85311-1118
PO BOX 1119, GLENDALE, AZ 85311-1119
PO BOX 1120, GLENDALE, AZ 85311-1120
PO BOX 1121, GLENDALE, AZ 85311-1121
PO BOX 1122, GLENDALE, AZ 85311-1122
PO BOX 1123, GLENDALE, AZ 85311-1123
PO BOX 1124, GLENDALE, AZ 85311-1124
PO BOX 1125, GLENDALE, AZ 85311-1125
PO BOX 1126, GLENDALE, AZ 85311-1126
PO BOX 1127, GLENDALE, AZ 85311-1127
PO BOX 1128, GLENDALE, AZ 85311-1128
PO BOX 1129, GLENDALE, AZ 85311-1129
PO BOX 1130, GLENDALE, AZ 85311-1130
PO BOX 1131, GLENDALE, AZ 85311-1131
PO BOX 1132, GLENDALE, AZ 85311-1132
PO BOX 1133, GLENDALE, AZ 85311-1133
PO BOX 1134, GLENDALE, AZ 85311-1134
PO BOX 1135, GLENDALE, AZ 85311-1135
PO BOX 1136, GLENDALE, AZ 85311-1136
PO BOX 1137, GLENDALE, AZ 85311-1137
PO BOX 1138, GLENDALE, AZ 85311-1138
PO BOX 1139, GLENDALE, AZ 85311-1139
PO BOX 1140, GLENDALE, AZ 85311-1140
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