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, DAVENPORT, IA 52805-0001
PO BOX 2, DAVENPORT, IA 52805-0002
PO BOX 3, DAVENPORT, IA 52805-0003
PO BOX 4, DAVENPORT, IA 52805-0004
PO BOX 5, DAVENPORT, IA 52805-0005
PO BOX 6, DAVENPORT, IA 52805-0006
PO BOX 7, DAVENPORT, IA 52805-0007
PO BOX 8, DAVENPORT, IA 52805-0008
PO BOX 9, DAVENPORT, IA 52805-0009
PO BOX 10, DAVENPORT, IA 52805-0010
PO BOX 11, DAVENPORT, IA 52805-0011
PO BOX 12, DAVENPORT, IA 52805-0012
PO BOX 13, DAVENPORT, IA 52805-0013
PO BOX 14, DAVENPORT, IA 52805-0014
PO BOX 15, DAVENPORT, IA 52805-0015
PO BOX 16, DAVENPORT, IA 52805-0016
PO BOX 17, DAVENPORT, IA 52805-0017
PO BOX 18, DAVENPORT, IA 52805-0018
PO BOX 19, DAVENPORT, IA 52805-0019
PO BOX 20, DAVENPORT, IA 52805-0020
PO BOX 21, DAVENPORT, IA 52805-0021
PO BOX 22, DAVENPORT, IA 52805-0022
PO BOX 23, DAVENPORT, IA 52805-0023
PO BOX 24, DAVENPORT, IA 52805-0024
PO BOX 25, DAVENPORT, IA 52805-0025
PO BOX 26, DAVENPORT, IA 52805-0026
PO BOX 27, DAVENPORT, IA 52805-0027
PO BOX 28, DAVENPORT, IA 52805-0028
PO BOX 29, DAVENPORT, IA 52805-0029
PO BOX 30, DAVENPORT, IA 52805-0030
PO BOX 31, DAVENPORT, IA 52805-0031
PO BOX 32, DAVENPORT, IA 52805-0032
PO BOX 33, DAVENPORT, IA 52805-0033
PO BOX 34, DAVENPORT, IA 52805-0034
PO BOX 35, DAVENPORT, IA 52805-0035
PO BOX 36, DAVENPORT, IA 52805-0036
PO BOX 37, DAVENPORT, IA 52805-0037
PO BOX 38, DAVENPORT, IA 52805-0038
PO BOX 39, DAVENPORT, IA 52805-0039
PO BOX 40, DAVENPORT, IA 52805-0040
PO BOX 41, DAVENPORT, IA 52805-0041
PO BOX 42, DAVENPORT, IA 52805-0042
PO BOX 43, DAVENPORT, IA 52805-0043
PO BOX 44, DAVENPORT, IA 52805-0044
PO BOX 45, DAVENPORT, IA 52805-0045
PO BOX 46, DAVENPORT, IA 52805-0046
PO BOX 47, DAVENPORT, IA 52805-0047
PO BOX 48, DAVENPORT, IA 52805-0048
PO BOX 49, DAVENPORT, IA 52805-0049
PO BOX 50, DAVENPORT, IA 52805-0050
PO BOX 51, DAVENPORT, IA 52805-0051
PO BOX 52, DAVENPORT, IA 52805-0052
PO BOX 53, DAVENPORT, IA 52805-0053
PO BOX 54, DAVENPORT, IA 52805-0054
PO BOX 55, DAVENPORT, IA 52805-0055
PO BOX 56, DAVENPORT, IA 52805-0056
PO BOX 57, DAVENPORT, IA 52805-0057
PO BOX 58, DAVENPORT, IA 52805-0058
PO BOX 59, DAVENPORT, IA 52805-0059
PO BOX 60, DAVENPORT, IA 52805-0060
PO BOX 61, DAVENPORT, IA 52805-0061
PO BOX 62, DAVENPORT, IA 52805-0062
PO BOX 63, DAVENPORT, IA 52805-0063
PO BOX 64, DAVENPORT, IA 52805-0064
PO BOX 65, DAVENPORT, IA 52805-0065
PO BOX 66, DAVENPORT, IA 52805-0066
PO BOX 67, DAVENPORT, IA 52805-0067
PO BOX 68, DAVENPORT, IA 52805-0068
PO BOX 69, DAVENPORT, IA 52805-0069
PO BOX 70, DAVENPORT, IA 52805-0070
PO BOX 71, DAVENPORT, IA 52805-0071
PO BOX 72, DAVENPORT, IA 52805-0072
PO BOX 73, DAVENPORT, IA 52805-0073
PO BOX 74, DAVENPORT, IA 52805-0074
PO BOX 75, DAVENPORT, IA 52805-0075
PO BOX 76, DAVENPORT, IA 52805-0076
PO BOX 77, DAVENPORT, IA 52805-0077
PO BOX 78, DAVENPORT, IA 52805-0078
PO BOX 79, DAVENPORT, IA 52805-0079
PO BOX 80, DAVENPORT, IA 52805-0080
PO BOX 81, DAVENPORT, IA 52805-0081
PO BOX 82, DAVENPORT, IA 52805-0082
PO BOX 83, DAVENPORT, IA 52805-0083
PO BOX 84, DAVENPORT, IA 52805-0084
PO BOX 85, DAVENPORT, IA 52805-0085
PO BOX 86, DAVENPORT, IA 52805-0086
PO BOX 87, DAVENPORT, IA 52805-0087
PO BOX 88, DAVENPORT, IA 52805-0088
PO BOX 89, DAVENPORT, IA 52805-0089
PO BOX 90, DAVENPORT, IA 52805-0090
PO BOX 91, DAVENPORT, IA 52805-0091
PO BOX 92, DAVENPORT, IA 52805-0092
PO BOX 93, DAVENPORT, IA 52805-0093
PO BOX 94, DAVENPORT, IA 52805-0094
PO BOX 95, DAVENPORT, IA 52805-0095
PO BOX 96, DAVENPORT, IA 52805-0096
PO BOX 97, DAVENPORT, IA 52805-0097
PO BOX 98, DAVENPORT, IA 52805-0098
PO BOX 99, DAVENPORT, IA 52805-0099
PO BOX 100, DAVENPORT, IA 52805-0100
PO BOX 101, DAVENPORT, IA 52805-0101
PO BOX 102, DAVENPORT, IA 52805-0102
PO BOX 103, DAVENPORT, IA 52805-0103
PO BOX 104, DAVENPORT, IA 52805-0104
PO BOX 105, DAVENPORT, IA 52805-0105
PO BOX 106, DAVENPORT, IA 52805-0106
PO BOX 107, DAVENPORT, IA 52805-0107
PO BOX 108, DAVENPORT, IA 52805-0108
PO BOX 109, DAVENPORT, IA 52805-0109
PO BOX 110, DAVENPORT, IA 52805-0110
PO BOX 111, DAVENPORT, IA 52805-0111
PO BOX 112, DAVENPORT, IA 52805-0112
PO BOX 113, DAVENPORT, IA 52805-0113
PO BOX 114, DAVENPORT, IA 52805-0114
PO BOX 115, DAVENPORT, IA 52805-0115
PO BOX 116, DAVENPORT, IA 52805-0116
PO BOX 117, DAVENPORT, IA 52805-0117
PO BOX 118, DAVENPORT, IA 52805-0118
PO BOX 119, DAVENPORT, IA 52805-0119
PO BOX 120, DAVENPORT, IA 52805-0120
PO BOX 121, DAVENPORT, IA 52805-0121
PO BOX 122, DAVENPORT, IA 52805-0122
PO BOX 123, DAVENPORT, IA 52805-0123
PO BOX 124, DAVENPORT, IA 52805-0124
PO BOX 125, DAVENPORT, IA 52805-0125
PO BOX 126, DAVENPORT, IA 52805-0126
PO BOX 127, DAVENPORT, IA 52805-0127
PO BOX 128, DAVENPORT, IA 52805-0128
PO BOX 129, DAVENPORT, IA 52805-0129
PO BOX 130, DAVENPORT, IA 52805-0130
PO BOX 131, DAVENPORT, IA 52805-0131
PO BOX 132, DAVENPORT, IA 52805-0132
PO BOX 133, DAVENPORT, IA 52805-0133
PO BOX 134, DAVENPORT, IA 52805-0134
PO BOX 135, DAVENPORT, IA 52805-0135
PO BOX 136, DAVENPORT, IA 52805-0136
PO BOX 137, DAVENPORT, IA 52805-0137
PO BOX 138, DAVENPORT, IA 52805-0138
PO BOX 139, DAVENPORT, IA 52805-0139
PO BOX 140, DAVENPORT, IA 52805-0140
PO BOX 141, DAVENPORT, IA 52805-0141
PO BOX 142, DAVENPORT, IA 52805-0142
PO BOX 143, DAVENPORT, IA 52805-0143
PO BOX 144, DAVENPORT, IA 52805-0144
PO BOX 145, DAVENPORT, IA 52805-0145
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