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, RIDGEWAY, IA 52165-0001
PO BOX 2, RIDGEWAY, IA 52165-0002
PO BOX 3, RIDGEWAY, IA 52165-0003
PO BOX 4, RIDGEWAY, IA 52165-0004
PO BOX 5, RIDGEWAY, IA 52165-0005
PO BOX 6, RIDGEWAY, IA 52165-0006
PO BOX 7, RIDGEWAY, IA 52165-0007
PO BOX 8, RIDGEWAY, IA 52165-0008
PO BOX 9, RIDGEWAY, IA 52165-0009
PO BOX 10, RIDGEWAY, IA 52165-0010
PO BOX 11, RIDGEWAY, IA 52165-0011
PO BOX 12, RIDGEWAY, IA 52165-0012
PO BOX 13, RIDGEWAY, IA 52165-0013
PO BOX 14, RIDGEWAY, IA 52165-0014
PO BOX 15, RIDGEWAY, IA 52165-0015
PO BOX 16, RIDGEWAY, IA 52165-0016
PO BOX 17, RIDGEWAY, IA 52165-0017
PO BOX 18, RIDGEWAY, IA 52165-0018
PO BOX 19, RIDGEWAY, IA 52165-0019
PO BOX 20, RIDGEWAY, IA 52165-0020
PO BOX 21, RIDGEWAY, IA 52165-0021
PO BOX 22, RIDGEWAY, IA 52165-0022
PO BOX 23, RIDGEWAY, IA 52165-0023
PO BOX 24, RIDGEWAY, IA 52165-0024
PO BOX 25, RIDGEWAY, IA 52165-0025
PO BOX 26, RIDGEWAY, IA 52165-0026
PO BOX 27, RIDGEWAY, IA 52165-0027
PO BOX 28, RIDGEWAY, IA 52165-0028
PO BOX 29, RIDGEWAY, IA 52165-0029
PO BOX 30, RIDGEWAY, IA 52165-0030
PO BOX 31, RIDGEWAY, IA 52165-0031
PO BOX 32, RIDGEWAY, IA 52165-0032
PO BOX 33, RIDGEWAY, IA 52165-0033
PO BOX 34, RIDGEWAY, IA 52165-0034
PO BOX 35, RIDGEWAY, IA 52165-0035
PO BOX 36, RIDGEWAY, IA 52165-0036
PO BOX 37, RIDGEWAY, IA 52165-0037
PO BOX 38, RIDGEWAY, IA 52165-0038
PO BOX 39, RIDGEWAY, IA 52165-0039
PO BOX 40, RIDGEWAY, IA 52165-0040
PO BOX 41, RIDGEWAY, IA 52165-0041
PO BOX 42, RIDGEWAY, IA 52165-0042
PO BOX 43, RIDGEWAY, IA 52165-0043
PO BOX 44, RIDGEWAY, IA 52165-0044
PO BOX 45, RIDGEWAY, IA 52165-0045
PO BOX 46, RIDGEWAY, IA 52165-0046
PO BOX 47, RIDGEWAY, IA 52165-0047
PO BOX 48, RIDGEWAY, IA 52165-0048
PO BOX 49, RIDGEWAY, IA 52165-0049
PO BOX 50, RIDGEWAY, IA 52165-0050
PO BOX 51, RIDGEWAY, IA 52165-0051
PO BOX 52, RIDGEWAY, IA 52165-0052
PO BOX 53, RIDGEWAY, IA 52165-0053
PO BOX 54, RIDGEWAY, IA 52165-0054
PO BOX 55, RIDGEWAY, IA 52165-0055
PO BOX 56, RIDGEWAY, IA 52165-0056
PO BOX 57, RIDGEWAY, IA 52165-0057
PO BOX 58, RIDGEWAY, IA 52165-0058
PO BOX 59, RIDGEWAY, IA 52165-0059
PO BOX 60, RIDGEWAY, IA 52165-0060
PO BOX 61, RIDGEWAY, IA 52165-0061
PO BOX 62, RIDGEWAY, IA 52165-0062
PO BOX 63, RIDGEWAY, IA 52165-0063
PO BOX 64, RIDGEWAY, IA 52165-0064
PO BOX 65, RIDGEWAY, IA 52165-0065
PO BOX 66, RIDGEWAY, IA 52165-0066
PO BOX 67, RIDGEWAY, IA 52165-0067
PO BOX 68, RIDGEWAY, IA 52165-0068
PO BOX 69, RIDGEWAY, IA 52165-0069
PO BOX 70, RIDGEWAY, IA 52165-0070
PO BOX 71, RIDGEWAY, IA 52165-0071
PO BOX 72, RIDGEWAY, IA 52165-0072
PO BOX 73, RIDGEWAY, IA 52165-0073
PO BOX 74, RIDGEWAY, IA 52165-0074
PO BOX 75, RIDGEWAY, IA 52165-0075
PO BOX 76, RIDGEWAY, IA 52165-0076
PO BOX 77, RIDGEWAY, IA 52165-0077
PO BOX 78, RIDGEWAY, IA 52165-0078
PO BOX 79, RIDGEWAY, IA 52165-0079
PO BOX 80, RIDGEWAY, IA 52165-0080
PO BOX 81, RIDGEWAY, IA 52165-0081
PO BOX 82, RIDGEWAY, IA 52165-0082
PO BOX 83, RIDGEWAY, IA 52165-0083
PO BOX 84, RIDGEWAY, IA 52165-0084
PO BOX 85, RIDGEWAY, IA 52165-0085
PO BOX 86, RIDGEWAY, IA 52165-0086
PO BOX 87, RIDGEWAY, IA 52165-0087
PO BOX 88, RIDGEWAY, IA 52165-0088
PO BOX 89, RIDGEWAY, IA 52165-0089
PO BOX 90, RIDGEWAY, IA 52165-0090
PO BOX 91, RIDGEWAY, IA 52165-0091
PO BOX 92, RIDGEWAY, IA 52165-0092
PO BOX 93, RIDGEWAY, IA 52165-0093
PO BOX 94, RIDGEWAY, IA 52165-0094
PO BOX 95, RIDGEWAY, IA 52165-0095
PO BOX 96, RIDGEWAY, IA 52165-0096
PO BOX 97, RIDGEWAY, IA 52165-0097
PO BOX 98, RIDGEWAY, IA 52165-0098
PO BOX 99, RIDGEWAY, IA 52165-0099
PO BOX 100, RIDGEWAY, IA 52165-0100
PO BOX 101, RIDGEWAY, IA 52165-0101
PO BOX 102, RIDGEWAY, IA 52165-0102
PO BOX 103, RIDGEWAY, IA 52165-0103
PO BOX 104, RIDGEWAY, IA 52165-0104
PO BOX 105, RIDGEWAY, IA 52165-0105
PO BOX 106, RIDGEWAY, IA 52165-0106
PO BOX 107, RIDGEWAY, IA 52165-0107
PO BOX 108, RIDGEWAY, IA 52165-0108
PO BOX 109, RIDGEWAY, IA 52165-0109
PO BOX 110, RIDGEWAY, IA 52165-0110
PO BOX 111, RIDGEWAY, IA 52165-0111
PO BOX 112, RIDGEWAY, IA 52165-0112
PO BOX 113, RIDGEWAY, IA 52165-0113
PO BOX 114, RIDGEWAY, IA 52165-0114
PO BOX 115, RIDGEWAY, IA 52165-0115
PO BOX 116, RIDGEWAY, IA 52165-0116
PO BOX 117, RIDGEWAY, IA 52165-0117
PO BOX 118, RIDGEWAY, IA 52165-0118
PO BOX 119, RIDGEWAY, IA 52165-0119
PO BOX 120, RIDGEWAY, IA 52165-0120
PO BOX 121, RIDGEWAY, IA 52165-0121
PO BOX 122, RIDGEWAY, IA 52165-0122
PO BOX 123, RIDGEWAY, IA 52165-0123
PO BOX 124, RIDGEWAY, IA 52165-0124
PO BOX 125, RIDGEWAY, IA 52165-0125
PO BOX 126, RIDGEWAY, IA 52165-0126
PO BOX 127, RIDGEWAY, IA 52165-0127
PO BOX 128, RIDGEWAY, IA 52165-0128
PO BOX 129, RIDGEWAY, IA 52165-0129
PO BOX 130, RIDGEWAY, IA 52165-0130
PO BOX 131, RIDGEWAY, IA 52165-0131
PO BOX 132, RIDGEWAY, IA 52165-0132
PO BOX 133, RIDGEWAY, IA 52165-0133
PO BOX 134, RIDGEWAY, IA 52165-0134
PO BOX 135, RIDGEWAY, IA 52165-0135
PO BOX 136, RIDGEWAY, IA 52165-0136
PO BOX 137, RIDGEWAY, IA 52165-0137
PO BOX 138, RIDGEWAY, IA 52165-0138
PO BOX 139, RIDGEWAY, IA 52165-0139
PO BOX 140, RIDGEWAY, IA 52165-0140
PO BOX 141, RIDGEWAY, IA 52165-0141
PO BOX 142, RIDGEWAY, IA 52165-0142
PO BOX 143, RIDGEWAY, IA 52165-0143
PO BOX 144, RIDGEWAY, IA 52165-0144
PO BOX 145, RIDGEWAY, IA 52165-0145
PO BOX 146, RIDGEWAY, IA 52165-0146
PO BOX 147, RIDGEWAY, IA 52165-0147
PO BOX 148, RIDGEWAY, IA 52165-0148
PO BOX 149, RIDGEWAY, IA 52165-0149
PO BOX 150, RIDGEWAY, IA 52165-0150
PO BOX 151, RIDGEWAY, IA 52165-0151
PO BOX 152, RIDGEWAY, IA 52165-0152
PO BOX 153, RIDGEWAY, IA 52165-0153
PO BOX 154, RIDGEWAY, IA 52165-0154
PO BOX 155, RIDGEWAY, IA 52165-0155
PO BOX 156, RIDGEWAY, IA 52165-0156
PO BOX 157, RIDGEWAY, IA 52165-0157
PO BOX 158, RIDGEWAY, IA 52165-0158
PO BOX 159, RIDGEWAY, IA 52165-0159
PO BOX 160, RIDGEWAY, IA 52165-0160
PO BOX 161, RIDGEWAY, IA 52165-0161
PO BOX 162, RIDGEWAY, IA 52165-0162
PO BOX 163, RIDGEWAY, IA 52165-0163
PO BOX 164, RIDGEWAY, IA 52165-0164
PO BOX 165, RIDGEWAY, IA 52165-0165
PO BOX 166, RIDGEWAY, IA 52165-0166
PO BOX 167, RIDGEWAY, IA 52165-0167
PO BOX 168, RIDGEWAY, IA 52165-0168
PO BOX 169, RIDGEWAY, IA 52165-0169
PO BOX 170, RIDGEWAY, IA 52165-0170
PO BOX 171, RIDGEWAY, IA 52165-0171
PO BOX 172, RIDGEWAY, IA 52165-0172
PO BOX 173, RIDGEWAY, IA 52165-0173
PO BOX 174, RIDGEWAY, IA 52165-0174
PO BOX 175, RIDGEWAY, IA 52165-0175
PO BOX 176, RIDGEWAY, IA 52165-0176
PO BOX 177, RIDGEWAY, IA 52165-0177
PO BOX 178, RIDGEWAY, IA 52165-0178
PO BOX 179, RIDGEWAY, IA 52165-0179
PO BOX 180, RIDGEWAY, IA 52165-0180
PO BOX 181, RIDGEWAY, IA 52165-0181
PO BOX 182, RIDGEWAY, IA 52165-0182
PO BOX 183, RIDGEWAY, IA 52165-0183
PO BOX 184, RIDGEWAY, IA 52165-0184
PO BOX 185, RIDGEWAY, IA 52165-0185
PO BOX 186, RIDGEWAY, IA 52165-0186
PO BOX 187, RIDGEWAY, IA 52165-0187
PO BOX 188, RIDGEWAY, IA 52165-0188
PO BOX 189, RIDGEWAY, IA 52165-0189
PO BOX 190, RIDGEWAY, IA 52165-0190
PO BOX 191, RIDGEWAY, IA 52165-0191
PO BOX 192, RIDGEWAY, IA 52165-0192
PO BOX 193, RIDGEWAY, IA 52165-0193
PO BOX 194, RIDGEWAY, IA 52165-0194
PO BOX 195, RIDGEWAY, IA 52165-0195
PO BOX 196, RIDGEWAY, IA 52165-0196
PO BOX 197, RIDGEWAY, IA 52165-0197
PO BOX 198, RIDGEWAY, IA 52165-0198
PO BOX 199, RIDGEWAY, IA 52165-0199
PO BOX 200, RIDGEWAY, IA 52165-0200
PO BOX 201, RIDGEWAY, IA 52165-0201
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