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 1, NORTH HOLLYWOOD, CA 91603-0001
PO BOX 2, NORTH HOLLYWOOD, CA 91603-0002
PO BOX 3, NORTH HOLLYWOOD, CA 91603-0003
PO BOX 4, NORTH HOLLYWOOD, CA 91603-0004
PO BOX 5, NORTH HOLLYWOOD, CA 91603-0005
PO BOX 6, NORTH HOLLYWOOD, CA 91603-0006
PO BOX 7, NORTH HOLLYWOOD, CA 91603-0007
PO BOX 8, NORTH HOLLYWOOD, CA 91603-0008
PO BOX 9, NORTH HOLLYWOOD, CA 91603-0009
PO BOX 10, NORTH HOLLYWOOD, CA 91603-0010
PO BOX 11, NORTH HOLLYWOOD, CA 91603-0011
PO BOX 12, NORTH HOLLYWOOD, CA 91603-0012
PO BOX 13, NORTH HOLLYWOOD, CA 91603-0013
PO BOX 14, NORTH HOLLYWOOD, CA 91603-0014
PO BOX 15, NORTH HOLLYWOOD, CA 91603-0015
PO BOX 16, NORTH HOLLYWOOD, CA 91603-0016
PO BOX 17, NORTH HOLLYWOOD, CA 91603-0017
PO BOX 18, NORTH HOLLYWOOD, CA 91603-0018
PO BOX 19, NORTH HOLLYWOOD, CA 91603-0019
PO BOX 20, NORTH HOLLYWOOD, CA 91603-0020
PO BOX 21, NORTH HOLLYWOOD, CA 91603-0021
PO BOX 22, NORTH HOLLYWOOD, CA 91603-0022
PO BOX 23, NORTH HOLLYWOOD, CA 91603-0023
PO BOX 24, NORTH HOLLYWOOD, CA 91603-0024
PO BOX 25, NORTH HOLLYWOOD, CA 91603-0025
PO BOX 26, NORTH HOLLYWOOD, CA 91603-0026
PO BOX 27, NORTH HOLLYWOOD, CA 91603-0027
PO BOX 28, NORTH HOLLYWOOD, CA 91603-0028
PO BOX 29, NORTH HOLLYWOOD, CA 91603-0029
PO BOX 30, NORTH HOLLYWOOD, CA 91603-0030
PO BOX 31, NORTH HOLLYWOOD, CA 91603-0031
PO BOX 32, NORTH HOLLYWOOD, CA 91603-0032
PO BOX 33, NORTH HOLLYWOOD, CA 91603-0033
PO BOX 34, NORTH HOLLYWOOD, CA 91603-0034
PO BOX 35, NORTH HOLLYWOOD, CA 91603-0035
PO BOX 36, NORTH HOLLYWOOD, CA 91603-0036
PO BOX 37, NORTH HOLLYWOOD, CA 91603-0037
PO BOX 38, NORTH HOLLYWOOD, CA 91603-0038
PO BOX 39, NORTH HOLLYWOOD, CA 91603-0039
PO BOX 40, NORTH HOLLYWOOD, CA 91603-0040
PO BOX 41, NORTH HOLLYWOOD, CA 91603-0041
PO BOX 42, NORTH HOLLYWOOD, CA 91603-0042
PO BOX 43, NORTH HOLLYWOOD, CA 91603-0043
PO BOX 44, NORTH HOLLYWOOD, CA 91603-0044
PO BOX 45, NORTH HOLLYWOOD, CA 91603-0045
PO BOX 46, NORTH HOLLYWOOD, CA 91603-0046
PO BOX 47, NORTH HOLLYWOOD, CA 91603-0047
PO BOX 48, NORTH HOLLYWOOD, CA 91603-0048
PO BOX 49, NORTH HOLLYWOOD, CA 91603-0049
PO BOX 50, NORTH HOLLYWOOD, CA 91603-0050
PO BOX 51, NORTH HOLLYWOOD, CA 91603-0051
PO BOX 52, NORTH HOLLYWOOD, CA 91603-0052
PO BOX 53, NORTH HOLLYWOOD, CA 91603-0053
PO BOX 54, NORTH HOLLYWOOD, CA 91603-0054
PO BOX 55, NORTH HOLLYWOOD, CA 91603-0055
PO BOX 56, NORTH HOLLYWOOD, CA 91603-0056
PO BOX 57, NORTH HOLLYWOOD, CA 91603-0057
PO BOX 58, NORTH HOLLYWOOD, CA 91603-0058
PO BOX 59, NORTH HOLLYWOOD, CA 91603-0059
PO BOX 60, NORTH HOLLYWOOD, CA 91603-0060
PO BOX 61, NORTH HOLLYWOOD, CA 91603-0061
PO BOX 62, NORTH HOLLYWOOD, CA 91603-0062
PO BOX 63, NORTH HOLLYWOOD, CA 91603-0063
PO BOX 64, NORTH HOLLYWOOD, CA 91603-0064
PO BOX 65, NORTH HOLLYWOOD, CA 91603-0065
PO BOX 66, NORTH HOLLYWOOD, CA 91603-0066
PO BOX 67, NORTH HOLLYWOOD, CA 91603-0067
PO BOX 68, NORTH HOLLYWOOD, CA 91603-0068
PO BOX 69, NORTH HOLLYWOOD, CA 91603-0069
PO BOX 70, NORTH HOLLYWOOD, CA 91603-0070
PO BOX 71, NORTH HOLLYWOOD, CA 91603-0071
PO BOX 72, NORTH HOLLYWOOD, CA 91603-0072
PO BOX 73, NORTH HOLLYWOOD, CA 91603-0073
PO BOX 74, NORTH HOLLYWOOD, CA 91603-0074
PO BOX 75, NORTH HOLLYWOOD, CA 91603-0075
PO BOX 76, NORTH HOLLYWOOD, CA 91603-0076
PO BOX 77, NORTH HOLLYWOOD, CA 91603-0077
PO BOX 78, NORTH HOLLYWOOD, CA 91603-0078
PO BOX 79, NORTH HOLLYWOOD, CA 91603-0079
PO BOX 80, NORTH HOLLYWOOD, CA 91603-0080
PO BOX 81, NORTH HOLLYWOOD, CA 91603-0081
PO BOX 82, NORTH HOLLYWOOD, CA 91603-0082
PO BOX 83, NORTH HOLLYWOOD, CA 91603-0083
PO BOX 84, NORTH HOLLYWOOD, CA 91603-0084
PO BOX 85, NORTH HOLLYWOOD, CA 91603-0085
PO BOX 86, NORTH HOLLYWOOD, CA 91603-0086
PO BOX 87, NORTH HOLLYWOOD, CA 91603-0087
PO BOX 88, NORTH HOLLYWOOD, CA 91603-0088
PO BOX 89, NORTH HOLLYWOOD, CA 91603-0089
PO BOX 90, NORTH HOLLYWOOD, CA 91603-0090
PO BOX 91, NORTH HOLLYWOOD, CA 91603-0091
PO BOX 92, NORTH HOLLYWOOD, CA 91603-0092
PO BOX 93, NORTH HOLLYWOOD, CA 91603-0093
PO BOX 94, NORTH HOLLYWOOD, CA 91603-0094
PO BOX 95, NORTH HOLLYWOOD, CA 91603-0095
PO BOX 96, NORTH HOLLYWOOD, CA 91603-0096
PO BOX 97, NORTH HOLLYWOOD, CA 91603-0097
PO BOX 98, NORTH HOLLYWOOD, CA 91603-0098
PO BOX 99, NORTH HOLLYWOOD, CA 91603-0099
PO BOX 100, NORTH HOLLYWOOD, CA 91603-0100
PO BOX 101, NORTH HOLLYWOOD, CA 91603-0101
PO BOX 102, NORTH HOLLYWOOD, CA 91603-0102
PO BOX 103, NORTH HOLLYWOOD, CA 91603-0103
PO BOX 104, NORTH HOLLYWOOD, CA 91603-0104
PO BOX 105, NORTH HOLLYWOOD, CA 91603-0105
PO BOX 106, NORTH HOLLYWOOD, CA 91603-0106
PO BOX 107, NORTH HOLLYWOOD, CA 91603-0107
PO BOX 108, NORTH HOLLYWOOD, CA 91603-0108
PO BOX 109, NORTH HOLLYWOOD, CA 91603-0109
PO BOX 110, NORTH HOLLYWOOD, CA 91603-0110
PO BOX 111, NORTH HOLLYWOOD, CA 91603-0111
PO BOX 112, NORTH HOLLYWOOD, CA 91603-0112
PO BOX 113, NORTH HOLLYWOOD, CA 91603-0113
PO BOX 114, NORTH HOLLYWOOD, CA 91603-0114
PO BOX 115, NORTH HOLLYWOOD, CA 91603-0115
PO BOX 116, NORTH HOLLYWOOD, CA 91603-0116
PO BOX 117, NORTH HOLLYWOOD, CA 91603-0117
PO BOX 118, NORTH HOLLYWOOD, CA 91603-0118
PO BOX 119, NORTH HOLLYWOOD, CA 91603-0119
PO BOX 120, NORTH HOLLYWOOD, CA 91603-0120
PO BOX 121, NORTH HOLLYWOOD, CA 91603-0121
PO BOX 122, NORTH HOLLYWOOD, CA 91603-0122
PO BOX 123, NORTH HOLLYWOOD, CA 91603-0123
PO BOX 124, NORTH HOLLYWOOD, CA 91603-0124
PO BOX 125, NORTH HOLLYWOOD, CA 91603-0125
PO BOX 126, NORTH HOLLYWOOD, CA 91603-0126
PO BOX 127, NORTH HOLLYWOOD, CA 91603-0127
PO BOX 128, NORTH HOLLYWOOD, CA 91603-0128
PO BOX 129, NORTH HOLLYWOOD, CA 91603-0129
PO BOX 130, NORTH HOLLYWOOD, CA 91603-0130
PO BOX 131, NORTH HOLLYWOOD, CA 91603-0131
PO BOX 132, NORTH HOLLYWOOD, CA 91603-0132
PO BOX 133, NORTH HOLLYWOOD, CA 91603-0133
PO BOX 134, NORTH HOLLYWOOD, CA 91603-0134
PO BOX 135, NORTH HOLLYWOOD, CA 91603-0135
PO BOX 136, NORTH HOLLYWOOD, CA 91603-0136
PO BOX 137, NORTH HOLLYWOOD, CA 91603-0137
PO BOX 138, NORTH HOLLYWOOD, CA 91603-0138
PO BOX 139, NORTH HOLLYWOOD, CA 91603-0139
PO BOX 140, NORTH HOLLYWOOD, CA 91603-0140
PO BOX 141, NORTH HOLLYWOOD, CA 91603-0141
PO BOX 142, NORTH HOLLYWOOD, CA 91603-0142
PO BOX 143, NORTH HOLLYWOOD, CA 91603-0143
PO BOX 144, NORTH HOLLYWOOD, CA 91603-0144
PO BOX 145, NORTH HOLLYWOOD, CA 91603-0145
PO BOX 146, NORTH HOLLYWOOD, CA 91603-0146
PO BOX 147, NORTH HOLLYWOOD, CA 91603-0147
PO BOX 148, NORTH HOLLYWOOD, CA 91603-0148
PO BOX 149, NORTH HOLLYWOOD, CA 91603-0149
PO BOX 150, NORTH HOLLYWOOD, CA 91603-0150
PO BOX 151, NORTH HOLLYWOOD, CA 91603-0151
PO BOX 152, NORTH HOLLYWOOD, CA 91603-0152
PO BOX 153, NORTH HOLLYWOOD, CA 91603-0153
PO BOX 154, NORTH HOLLYWOOD, CA 91603-0154
PO BOX 155, NORTH HOLLYWOOD, CA 91603-0155
PO BOX 156, NORTH HOLLYWOOD, CA 91603-0156
PO BOX 157, NORTH HOLLYWOOD, CA 91603-0157
PO BOX 158, NORTH HOLLYWOOD, CA 91603-0158
PO BOX 159, NORTH HOLLYWOOD, CA 91603-0159
PO BOX 160, NORTH HOLLYWOOD, CA 91603-0160
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