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, JULIAN, CA 92036-0961
PO BOX 962, JULIAN, CA 92036-0962
PO BOX 963, JULIAN, CA 92036-0963
PO BOX 964, JULIAN, CA 92036-0964
PO BOX 965, JULIAN, CA 92036-0965
PO BOX 966, JULIAN, CA 92036-0966
PO BOX 967, JULIAN, CA 92036-0967
PO BOX 968, JULIAN, CA 92036-0968
PO BOX 969, JULIAN, CA 92036-0969
PO BOX 970, JULIAN, CA 92036-0970
PO BOX 971, JULIAN, CA 92036-0971
PO BOX 972, JULIAN, CA 92036-0972
PO BOX 973, JULIAN, CA 92036-0973
PO BOX 974, JULIAN, CA 92036-0974
PO BOX 975, JULIAN, CA 92036-0975
PO BOX 976, JULIAN, CA 92036-0976
PO BOX 977, JULIAN, CA 92036-0977
PO BOX 978, JULIAN, CA 92036-0978
PO BOX 979, JULIAN, CA 92036-0979
PO BOX 980, JULIAN, CA 92036-0980
PO BOX 981, JULIAN, CA 92036-0981
PO BOX 982, JULIAN, CA 92036-0982
PO BOX 983, JULIAN, CA 92036-0983
PO BOX 984, JULIAN, CA 92036-0984
PO BOX 985, JULIAN, CA 92036-0985
PO BOX 986, JULIAN, CA 92036-0986
PO BOX 987, JULIAN, CA 92036-0987
PO BOX 988, JULIAN, CA 92036-0988
PO BOX 989, JULIAN, CA 92036-0989
PO BOX 990, JULIAN, CA 92036-0990
PO BOX 991, JULIAN, CA 92036-0991
PO BOX 992, JULIAN, CA 92036-0992
PO BOX 993, JULIAN, CA 92036-0993
PO BOX 994, JULIAN, CA 92036-0994
PO BOX 995, JULIAN, CA 92036-0995
PO BOX 996, JULIAN, CA 92036-0996
PO BOX 997, JULIAN, CA 92036-0997
PO BOX 998, JULIAN, CA 92036-0998
PO BOX 999, JULIAN, CA 92036-0999
PO BOX 1000, JULIAN, CA 92036-1000
PO BOX 1001, JULIAN, CA 92036-1001
PO BOX 1002, JULIAN, CA 92036-1002
PO BOX 1003, JULIAN, CA 92036-1003
PO BOX 1004, JULIAN, CA 92036-1004
PO BOX 1005, JULIAN, CA 92036-1005
PO BOX 1006, JULIAN, CA 92036-1006
PO BOX 1007, JULIAN, CA 92036-1007
PO BOX 1008, JULIAN, CA 92036-1008
PO BOX 1009, JULIAN, CA 92036-1009
PO BOX 1010, JULIAN, CA 92036-1010
PO BOX 1011, JULIAN, CA 92036-1011
PO BOX 1012, JULIAN, CA 92036-1012
PO BOX 1013, JULIAN, CA 92036-1013
PO BOX 1014, JULIAN, CA 92036-1014
PO BOX 1015, JULIAN, CA 92036-1015
PO BOX 1016, JULIAN, CA 92036-1016
PO BOX 1017, JULIAN, CA 92036-1017
PO BOX 1018, JULIAN, CA 92036-1018
PO BOX 1019, JULIAN, CA 92036-1019
PO BOX 1020, JULIAN, CA 92036-1020
PO BOX 1021, JULIAN, CA 92036-1021
PO BOX 1022, JULIAN, CA 92036-1022
PO BOX 1023, JULIAN, CA 92036-1023
PO BOX 1024, JULIAN, CA 92036-1024
PO BOX 1025, JULIAN, CA 92036-1025
PO BOX 1026, JULIAN, CA 92036-1026
PO BOX 1027, JULIAN, CA 92036-1027
PO BOX 1028, JULIAN, CA 92036-1028
PO BOX 1029, JULIAN, CA 92036-1029
PO BOX 1030, JULIAN, CA 92036-1030
PO BOX 1031, JULIAN, CA 92036-1031
PO BOX 1032, JULIAN, CA 92036-1032
PO BOX 1033, JULIAN, CA 92036-1033
PO BOX 1034, JULIAN, CA 92036-1034
PO BOX 1035, JULIAN, CA 92036-1035
PO BOX 1036, JULIAN, CA 92036-1036
PO BOX 1037, JULIAN, CA 92036-1037
PO BOX 1038, JULIAN, CA 92036-1038
PO BOX 1039, JULIAN, CA 92036-1039
PO BOX 1040, JULIAN, CA 92036-1040
PO BOX 1041, JULIAN, CA 92036-1041
PO BOX 1042, JULIAN, CA 92036-1042
PO BOX 1043, JULIAN, CA 92036-1043
PO BOX 1044, JULIAN, CA 92036-1044
PO BOX 1045, JULIAN, CA 92036-1045
PO BOX 1046, JULIAN, CA 92036-1046
PO BOX 1047, JULIAN, CA 92036-1047
PO BOX 1048, JULIAN, CA 92036-1048
PO BOX 1049, JULIAN, CA 92036-1049
PO BOX 1050, JULIAN, CA 92036-1050
PO BOX 1051, JULIAN, CA 92036-1051
PO BOX 1052, JULIAN, CA 92036-1052
PO BOX 1053, JULIAN, CA 92036-1053
PO BOX 1054, JULIAN, CA 92036-1054
PO BOX 1055, JULIAN, CA 92036-1055
PO BOX 1056, JULIAN, CA 92036-1056
PO BOX 1057, JULIAN, CA 92036-1057
PO BOX 1058, JULIAN, CA 92036-1058
PO BOX 1059, JULIAN, CA 92036-1059
PO BOX 1060, JULIAN, CA 92036-1060
PO BOX 1061, JULIAN, CA 92036-1061
PO BOX 1062, JULIAN, CA 92036-1062
PO BOX 1063, JULIAN, CA 92036-1063
PO BOX 1064, JULIAN, CA 92036-1064
PO BOX 1065, JULIAN, CA 92036-1065
PO BOX 1066, JULIAN, CA 92036-1066
PO BOX 1067, JULIAN, CA 92036-1067
PO BOX 1068, JULIAN, CA 92036-1068
PO BOX 1069, JULIAN, CA 92036-1069
PO BOX 1070, JULIAN, CA 92036-1070
PO BOX 1071, JULIAN, CA 92036-1071
PO BOX 1072, JULIAN, CA 92036-1072
PO BOX 1073, JULIAN, CA 92036-1073
PO BOX 1074, JULIAN, CA 92036-1074
PO BOX 1075, JULIAN, CA 92036-1075
PO BOX 1076, JULIAN, CA 92036-1076
PO BOX 1077, JULIAN, CA 92036-1077
PO BOX 1078, JULIAN, CA 92036-1078
PO BOX 1079, JULIAN, CA 92036-1079
PO BOX 1080, JULIAN, CA 92036-1080
PO BOX 1081, JULIAN, CA 92036-1081
PO BOX 1082, JULIAN, CA 92036-1082
PO BOX 1083, JULIAN, CA 92036-1083
PO BOX 1084, JULIAN, CA 92036-1084
PO BOX 1085, JULIAN, CA 92036-1085
PO BOX 1086, JULIAN, CA 92036-1086
PO BOX 1087, JULIAN, CA 92036-1087
PO BOX 1088, JULIAN, CA 92036-1088
PO BOX 1089, JULIAN, CA 92036-1089
PO BOX 1090, JULIAN, CA 92036-1090
PO BOX 1091, JULIAN, CA 92036-1091
PO BOX 1092, JULIAN, CA 92036-1092
PO BOX 1093, JULIAN, CA 92036-1093
PO BOX 1094, JULIAN, CA 92036-1094
PO BOX 1095, JULIAN, CA 92036-1095
PO BOX 1096, JULIAN, CA 92036-1096
PO BOX 1097, JULIAN, CA 92036-1097
PO BOX 1098, JULIAN, CA 92036-1098
PO BOX 1099, JULIAN, CA 92036-1099
PO BOX 1100, JULIAN, CA 92036-1100
PO BOX 1101, JULIAN, CA 92036-1101
PO BOX 1102, JULIAN, CA 92036-1102
PO BOX 1103, JULIAN, CA 92036-1103
PO BOX 1104, JULIAN, CA 92036-1104
PO BOX 1105, JULIAN, CA 92036-1105
PO BOX 1106, JULIAN, CA 92036-1106
PO BOX 1107, JULIAN, CA 92036-1107
PO BOX 1108, JULIAN, CA 92036-1108
PO BOX 1109, JULIAN, CA 92036-1109
PO BOX 1110, JULIAN, CA 92036-1110
PO BOX 1111, JULIAN, CA 92036-1111
PO BOX 1112, JULIAN, CA 92036-1112
PO BOX 1113, JULIAN, CA 92036-1113
PO BOX 1114, JULIAN, CA 92036-1114
PO BOX 1115, JULIAN, CA 92036-1115
PO BOX 1116, JULIAN, CA 92036-1116
PO BOX 1117, JULIAN, CA 92036-1117
PO BOX 1118, JULIAN, CA 92036-1118
PO BOX 1119, JULIAN, CA 92036-1119
PO BOX 1120, JULIAN, CA 92036-1120
PO BOX 1121, JULIAN, CA 92036-1121
PO BOX 1122, JULIAN, CA 92036-1122
PO BOX 1123, JULIAN, CA 92036-1123
PO BOX 1124, JULIAN, CA 92036-1124
PO BOX 1125, JULIAN, CA 92036-1125
PO BOX 1126, JULIAN, CA 92036-1126
PO BOX 1127, JULIAN, CA 92036-1127
PO BOX 1128, JULIAN, CA 92036-1128
PO BOX 1129, JULIAN, CA 92036-1129
PO BOX 1130, JULIAN, CA 92036-1130
PO BOX 1131, JULIAN, CA 92036-1131
PO BOX 1132, JULIAN, CA 92036-1132
PO BOX 1133, JULIAN, CA 92036-1133
PO BOX 1134, JULIAN, CA 92036-1134
PO BOX 1135, JULIAN, CA 92036-1135
PO BOX 1136, JULIAN, CA 92036-1136
PO BOX 1137, JULIAN, CA 92036-1137
PO BOX 1138, JULIAN, CA 92036-1138
PO BOX 1139, JULIAN, CA 92036-1139
PO BOX 1140, JULIAN, CA 92036-1140
PO BOX 1141, JULIAN, CA 92036-1141
PO BOX 1142, JULIAN, CA 92036-1142
PO BOX 1143, JULIAN, CA 92036-1143
PO BOX 1144, JULIAN, CA 92036-1144
PO BOX 1145, JULIAN, CA 92036-1145
PO BOX 1146, JULIAN, CA 92036-1146
PO BOX 1147, JULIAN, CA 92036-1147
PO BOX 1148, JULIAN, CA 92036-1148
PO BOX 1149, JULIAN, CA 92036-1149
PO BOX 1150, JULIAN, CA 92036-1150
PO BOX 1151, JULIAN, CA 92036-1151
PO BOX 1152, JULIAN, CA 92036-1152
PO BOX 1153, JULIAN, CA 92036-1153
PO BOX 1154, JULIAN, CA 92036-1154
PO BOX 1155, JULIAN, CA 92036-1155
PO BOX 1156, JULIAN, CA 92036-1156
PO BOX 1157, JULIAN, CA 92036-1157
PO BOX 1158, JULIAN, CA 92036-1158
PO BOX 1159, JULIAN, CA 92036-1159
PO BOX 1160, JULIAN, CA 92036-1160
PO BOX 1161, JULIAN, CA 92036-1161