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 11, ANAMOSA, IA 52205-0011
PO BOX 12, ANAMOSA, IA 52205-0012
PO BOX 13, ANAMOSA, IA 52205-0013
PO BOX 14, ANAMOSA, IA 52205-0014
PO BOX 15, ANAMOSA, IA 52205-0015
PO BOX 16, ANAMOSA, IA 52205-0016
PO BOX 17, ANAMOSA, IA 52205-0017
PO BOX 18, ANAMOSA, IA 52205-0018
PO BOX 19, ANAMOSA, IA 52205-0019
PO BOX 20, ANAMOSA, IA 52205-0020
PO BOX 21, ANAMOSA, IA 52205-0021
PO BOX 22, ANAMOSA, IA 52205-0022
PO BOX 23, ANAMOSA, IA 52205-0023
PO BOX 24, ANAMOSA, IA 52205-0024
PO BOX 25, ANAMOSA, IA 52205-0025
PO BOX 26, ANAMOSA, IA 52205-0026
PO BOX 27, ANAMOSA, IA 52205-0027
PO BOX 28, ANAMOSA, IA 52205-0028
PO BOX 29, ANAMOSA, IA 52205-0029
PO BOX 30, ANAMOSA, IA 52205-0030
PO BOX 31, ANAMOSA, IA 52205-0031
PO BOX 32, ANAMOSA, IA 52205-0032
PO BOX 33, ANAMOSA, IA 52205-0033
PO BOX 34, ANAMOSA, IA 52205-0034
PO BOX 35, ANAMOSA, IA 52205-0035
PO BOX 36, ANAMOSA, IA 52205-0036
PO BOX 37, ANAMOSA, IA 52205-0037
PO BOX 38, ANAMOSA, IA 52205-0038
PO BOX 39, ANAMOSA, IA 52205-0039
PO BOX 40, ANAMOSA, IA 52205-0040
PO BOX 41, ANAMOSA, IA 52205-0041
PO BOX 42, ANAMOSA, IA 52205-0042
PO BOX 43, ANAMOSA, IA 52205-0043
PO BOX 44, ANAMOSA, IA 52205-0044
PO BOX 45, ANAMOSA, IA 52205-0045
PO BOX 46, ANAMOSA, IA 52205-0046
PO BOX 47, ANAMOSA, IA 52205-0047
PO BOX 48, ANAMOSA, IA 52205-0048
PO BOX 49, ANAMOSA, IA 52205-0049
PO BOX 50, ANAMOSA, IA 52205-0050
PO BOX 51, ANAMOSA, IA 52205-0051
PO BOX 52, ANAMOSA, IA 52205-0052
PO BOX 53, ANAMOSA, IA 52205-0053
PO BOX 54, ANAMOSA, IA 52205-0054
PO BOX 55, ANAMOSA, IA 52205-0055
PO BOX 56, ANAMOSA, IA 52205-0056
PO BOX 57, ANAMOSA, IA 52205-0057
PO BOX 58, ANAMOSA, IA 52205-0058
PO BOX 59, ANAMOSA, IA 52205-0059
PO BOX 60, ANAMOSA, IA 52205-0060
PO BOX 61, ANAMOSA, IA 52205-0061
PO BOX 62, ANAMOSA, IA 52205-0062
PO BOX 63, ANAMOSA, IA 52205-0063
PO BOX 64, ANAMOSA, IA 52205-0064
PO BOX 65, ANAMOSA, IA 52205-0065
PO BOX 66, ANAMOSA, IA 52205-0066
PO BOX 67, ANAMOSA, IA 52205-0067
PO BOX 68, ANAMOSA, IA 52205-0068
PO BOX 69, ANAMOSA, IA 52205-0069
PO BOX 70, ANAMOSA, IA 52205-0070
PO BOX 71, ANAMOSA, IA 52205-0071
PO BOX 72, ANAMOSA, IA 52205-0072
PO BOX 73, ANAMOSA, IA 52205-0073
PO BOX 74, ANAMOSA, IA 52205-0074
PO BOX 75, ANAMOSA, IA 52205-0075
PO BOX 76, ANAMOSA, IA 52205-0076
PO BOX 77, ANAMOSA, IA 52205-0077
PO BOX 78, ANAMOSA, IA 52205-0078
PO BOX 79, ANAMOSA, IA 52205-0079
PO BOX 80, ANAMOSA, IA 52205-0080
PO BOX 81, ANAMOSA, IA 52205-0081
PO BOX 82, ANAMOSA, IA 52205-0082
PO BOX 83, ANAMOSA, IA 52205-0083
PO BOX 84, ANAMOSA, IA 52205-0084
PO BOX 85, ANAMOSA, IA 52205-0085
PO BOX 86, ANAMOSA, IA 52205-0086
PO BOX 87, ANAMOSA, IA 52205-0087
PO BOX 88, ANAMOSA, IA 52205-0088
PO BOX 89, ANAMOSA, IA 52205-0089
PO BOX 90, ANAMOSA, IA 52205-0090
PO BOX 91, ANAMOSA, IA 52205-0091
PO BOX 92, ANAMOSA, IA 52205-0092
PO BOX 93, ANAMOSA, IA 52205-0093
PO BOX 94, ANAMOSA, IA 52205-0094
PO BOX 95, ANAMOSA, IA 52205-0095
PO BOX 96, ANAMOSA, IA 52205-0096
PO BOX 97, ANAMOSA, IA 52205-0097
PO BOX 98, ANAMOSA, IA 52205-0098
PO BOX 99, ANAMOSA, IA 52205-0099
PO BOX 100, ANAMOSA, IA 52205-0100
PO BOX 101, ANAMOSA, IA 52205-0101
PO BOX 102, ANAMOSA, IA 52205-0102
PO BOX 103, ANAMOSA, IA 52205-0103
PO BOX 104, ANAMOSA, IA 52205-0104
PO BOX 105, ANAMOSA, IA 52205-0105
PO BOX 106, ANAMOSA, IA 52205-0106
PO BOX 107, ANAMOSA, IA 52205-0107
PO BOX 108, ANAMOSA, IA 52205-0108
PO BOX 109, ANAMOSA, IA 52205-0109
PO BOX 110, ANAMOSA, IA 52205-0110
PO BOX 111, ANAMOSA, IA 52205-0111
PO BOX 112, ANAMOSA, IA 52205-0112
PO BOX 113, ANAMOSA, IA 52205-0113
PO BOX 114, ANAMOSA, IA 52205-0114
PO BOX 115, ANAMOSA, IA 52205-0115
PO BOX 116, ANAMOSA, IA 52205-0116
PO BOX 117, ANAMOSA, IA 52205-0117
PO BOX 118, ANAMOSA, IA 52205-0118
PO BOX 119, ANAMOSA, IA 52205-0119
PO BOX 120, ANAMOSA, IA 52205-0120
PO BOX 121, ANAMOSA, IA 52205-0121
PO BOX 122, ANAMOSA, IA 52205-0122
PO BOX 123, ANAMOSA, IA 52205-0123
PO BOX 124, ANAMOSA, IA 52205-0124
PO BOX 125, ANAMOSA, IA 52205-0125
PO BOX 126, ANAMOSA, IA 52205-0126
PO BOX 127, ANAMOSA, IA 52205-0127
PO BOX 128, ANAMOSA, IA 52205-0128
PO BOX 129, ANAMOSA, IA 52205-0129
PO BOX 130, ANAMOSA, IA 52205-0130
PO BOX 131, ANAMOSA, IA 52205-0131
PO BOX 132, ANAMOSA, IA 52205-0132
PO BOX 133, ANAMOSA, IA 52205-0133
PO BOX 134, ANAMOSA, IA 52205-0134
PO BOX 135, ANAMOSA, IA 52205-0135
PO BOX 136, ANAMOSA, IA 52205-0136
PO BOX 137, ANAMOSA, IA 52205-0137
PO BOX 138, ANAMOSA, IA 52205-0138
PO BOX 139, ANAMOSA, IA 52205-0139
PO BOX 140, ANAMOSA, IA 52205-0140
PO BOX 141, ANAMOSA, IA 52205-0141
PO BOX 142, ANAMOSA, IA 52205-0142
PO BOX 143, ANAMOSA, IA 52205-0143
PO BOX 144, ANAMOSA, IA 52205-0144
PO BOX 145, ANAMOSA, IA 52205-0145
PO BOX 146, ANAMOSA, IA 52205-0146
PO BOX 147, ANAMOSA, IA 52205-0147
PO BOX 148, ANAMOSA, IA 52205-0148
PO BOX 149, ANAMOSA, IA 52205-0149
PO BOX 150, ANAMOSA, IA 52205-0150
PO BOX 151, ANAMOSA, IA 52205-0151
PO BOX 152, ANAMOSA, IA 52205-0152
PO BOX 153, ANAMOSA, IA 52205-0153
PO BOX 154, ANAMOSA, IA 52205-0154
PO BOX 155, ANAMOSA, IA 52205-0155
PO BOX 156, ANAMOSA, IA 52205-0156
PO BOX 157, ANAMOSA, IA 52205-0157
PO BOX 158, ANAMOSA, IA 52205-0158
PO BOX 159, ANAMOSA, IA 52205-0159
PO BOX 160, ANAMOSA, IA 52205-0160
PO BOX 161, ANAMOSA, IA 52205-0161
PO BOX 162, ANAMOSA, IA 52205-0162
PO BOX 163, ANAMOSA, IA 52205-0163
PO BOX 164, ANAMOSA, IA 52205-0164
PO BOX 165, ANAMOSA, IA 52205-0165
PO BOX 166, ANAMOSA, IA 52205-0166
PO BOX 167, ANAMOSA, IA 52205-0167
PO BOX 168, ANAMOSA, IA 52205-0168
PO BOX 169, ANAMOSA, IA 52205-0169
PO BOX 170, ANAMOSA, IA 52205-0170
PO BOX 171, ANAMOSA, IA 52205-0171
PO BOX 172, ANAMOSA, IA 52205-0172
PO BOX 173, ANAMOSA, IA 52205-0173
PO BOX 174, ANAMOSA, IA 52205-0174
PO BOX 175, ANAMOSA, IA 52205-0175
PO BOX 176, ANAMOSA, IA 52205-0176
PO BOX 177, ANAMOSA, IA 52205-0177
PO BOX 178, ANAMOSA, IA 52205-0178
PO BOX 179, ANAMOSA, IA 52205-0179
PO BOX 180, ANAMOSA, IA 52205-0180
PO BOX 181, ANAMOSA, IA 52205-0181
PO BOX 182, ANAMOSA, IA 52205-0182
PO BOX 183, ANAMOSA, IA 52205-0183
PO BOX 184, ANAMOSA, IA 52205-0184
PO BOX 185, ANAMOSA, IA 52205-0185
PO BOX 186, ANAMOSA, IA 52205-0186
PO BOX 187, ANAMOSA, IA 52205-0187
PO BOX 188, ANAMOSA, IA 52205-0188
PO BOX 189, ANAMOSA, IA 52205-0189
PO BOX 190, ANAMOSA, IA 52205-0190
PO BOX 191, ANAMOSA, IA 52205-0191
PO BOX 192, ANAMOSA, IA 52205-0192
PO BOX 193, ANAMOSA, IA 52205-0193
PO BOX 194, ANAMOSA, IA 52205-0194
PO BOX 195, ANAMOSA, IA 52205-0195
PO BOX 196, ANAMOSA, IA 52205-0196
PO BOX 197, ANAMOSA, IA 52205-0197
PO BOX 198, ANAMOSA, IA 52205-0198
PO BOX 199, ANAMOSA, IA 52205-0199
PO BOX 200, ANAMOSA, IA 52205-0200
PO BOX 201, ANAMOSA, IA 52205-0201
PO BOX 202, ANAMOSA, IA 52205-0202
PO BOX 203, ANAMOSA, IA 52205-0203
PO BOX 204, ANAMOSA, IA 52205-0204
PO BOX 205, ANAMOSA, IA 52205-0205
PO BOX 206, ANAMOSA, IA 52205-0206
PO BOX 207, ANAMOSA, IA 52205-0207
PO BOX 208, ANAMOSA, IA 52205-0208
PO BOX 209, ANAMOSA, IA 52205-0209
PO BOX 210, ANAMOSA, IA 52205-0210
PO BOX 211, ANAMOSA, IA 52205-0211
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