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, TITONKA, IA 50480-0001
PO BOX 2, TITONKA, IA 50480-0002
PO BOX 3, TITONKA, IA 50480-0003
PO BOX 4, TITONKA, IA 50480-0004
PO BOX 5, TITONKA, IA 50480-0005
PO BOX 6, TITONKA, IA 50480-0006
PO BOX 7, TITONKA, IA 50480-0007
PO BOX 8, TITONKA, IA 50480-0008
PO BOX 9, TITONKA, IA 50480-0009
PO BOX 10, TITONKA, IA 50480-0010
PO BOX 11, TITONKA, IA 50480-0011
PO BOX 12, TITONKA, IA 50480-0012
PO BOX 13, TITONKA, IA 50480-0013
PO BOX 14, TITONKA, IA 50480-0014
PO BOX 15, TITONKA, IA 50480-0015
PO BOX 16, TITONKA, IA 50480-0016
PO BOX 17, TITONKA, IA 50480-0017
PO BOX 18, TITONKA, IA 50480-0018
PO BOX 19, TITONKA, IA 50480-0019
PO BOX 20, TITONKA, IA 50480-0020
PO BOX 21, TITONKA, IA 50480-0021
PO BOX 22, TITONKA, IA 50480-0022
PO BOX 23, TITONKA, IA 50480-0023
PO BOX 24, TITONKA, IA 50480-0024
PO BOX 25, TITONKA, IA 50480-0025
PO BOX 26, TITONKA, IA 50480-0026
PO BOX 27, TITONKA, IA 50480-0027
PO BOX 28, TITONKA, IA 50480-0028
PO BOX 29, TITONKA, IA 50480-0029
PO BOX 30, TITONKA, IA 50480-0030
PO BOX 31, TITONKA, IA 50480-0031
PO BOX 32, TITONKA, IA 50480-0032
PO BOX 33, TITONKA, IA 50480-0033
PO BOX 34, TITONKA, IA 50480-0034
PO BOX 35, TITONKA, IA 50480-0035
PO BOX 36, TITONKA, IA 50480-0036
PO BOX 37, TITONKA, IA 50480-0037
PO BOX 38, TITONKA, IA 50480-0038
PO BOX 39, TITONKA, IA 50480-0039
PO BOX 40, TITONKA, IA 50480-0040
PO BOX 41, TITONKA, IA 50480-0041
PO BOX 42, TITONKA, IA 50480-0042
PO BOX 43, TITONKA, IA 50480-0043
PO BOX 44, TITONKA, IA 50480-0044
PO BOX 45, TITONKA, IA 50480-0045
PO BOX 46, TITONKA, IA 50480-0046
PO BOX 47, TITONKA, IA 50480-0047
PO BOX 48, TITONKA, IA 50480-0048
PO BOX 49, TITONKA, IA 50480-0049
PO BOX 50, TITONKA, IA 50480-0050
PO BOX 51, TITONKA, IA 50480-0051
PO BOX 52, TITONKA, IA 50480-0052
PO BOX 53, TITONKA, IA 50480-0053
PO BOX 54, TITONKA, IA 50480-0054
PO BOX 55, TITONKA, IA 50480-0055
PO BOX 56, TITONKA, IA 50480-0056
PO BOX 57, TITONKA, IA 50480-0057
PO BOX 58, TITONKA, IA 50480-0058
PO BOX 59, TITONKA, IA 50480-0059
PO BOX 60, TITONKA, IA 50480-0060
PO BOX 61, TITONKA, IA 50480-0061
PO BOX 62, TITONKA, IA 50480-0062
PO BOX 63, TITONKA, IA 50480-0063
PO BOX 64, TITONKA, IA 50480-0064
PO BOX 65, TITONKA, IA 50480-0065
PO BOX 66, TITONKA, IA 50480-0066
PO BOX 67, TITONKA, IA 50480-0067
PO BOX 68, TITONKA, IA 50480-0068
PO BOX 69, TITONKA, IA 50480-0069
PO BOX 70, TITONKA, IA 50480-0070
PO BOX 71, TITONKA, IA 50480-0071
PO BOX 72, TITONKA, IA 50480-0072
PO BOX 73, TITONKA, IA 50480-0073
PO BOX 74, TITONKA, IA 50480-0074
PO BOX 75, TITONKA, IA 50480-0075
PO BOX 76, TITONKA, IA 50480-0076
PO BOX 77, TITONKA, IA 50480-0077
PO BOX 78, TITONKA, IA 50480-0078
PO BOX 79, TITONKA, IA 50480-0079
PO BOX 80, TITONKA, IA 50480-0080
PO BOX 81, TITONKA, IA 50480-0081
PO BOX 82, TITONKA, IA 50480-0082
PO BOX 83, TITONKA, IA 50480-0083
PO BOX 84, TITONKA, IA 50480-0084
PO BOX 85, TITONKA, IA 50480-0085
PO BOX 86, TITONKA, IA 50480-0086
PO BOX 87, TITONKA, IA 50480-0087
PO BOX 88, TITONKA, IA 50480-0088
PO BOX 89, TITONKA, IA 50480-0089
PO BOX 90, TITONKA, IA 50480-0090
PO BOX 91, TITONKA, IA 50480-0091
PO BOX 92, TITONKA, IA 50480-0092
PO BOX 93, TITONKA, IA 50480-0093
PO BOX 94, TITONKA, IA 50480-0094
PO BOX 95, TITONKA, IA 50480-0095
PO BOX 96, TITONKA, IA 50480-0096
PO BOX 97, TITONKA, IA 50480-0097
PO BOX 98, TITONKA, IA 50480-0098
PO BOX 99, TITONKA, IA 50480-0099
PO BOX 100, TITONKA, IA 50480-0100
PO BOX 101, TITONKA, IA 50480-0101
PO BOX 102, TITONKA, IA 50480-0102
PO BOX 103, TITONKA, IA 50480-0103
PO BOX 104, TITONKA, IA 50480-0104
PO BOX 105, TITONKA, IA 50480-0105
PO BOX 106, TITONKA, IA 50480-0106
PO BOX 107, TITONKA, IA 50480-0107
PO BOX 108, TITONKA, IA 50480-0108
PO BOX 109, TITONKA, IA 50480-0109
PO BOX 110, TITONKA, IA 50480-0110
PO BOX 111, TITONKA, IA 50480-0111
PO BOX 112, TITONKA, IA 50480-0112
PO BOX 113, TITONKA, IA 50480-0113
PO BOX 114, TITONKA, IA 50480-0114
PO BOX 115, TITONKA, IA 50480-0115
PO BOX 116, TITONKA, IA 50480-0116
PO BOX 117, TITONKA, IA 50480-0117
PO BOX 118, TITONKA, IA 50480-0118
PO BOX 119, TITONKA, IA 50480-0119
PO BOX 120, TITONKA, IA 50480-0120
PO BOX 121, TITONKA, IA 50480-0121
PO BOX 122, TITONKA, IA 50480-0122
PO BOX 123, TITONKA, IA 50480-0123
PO BOX 124, TITONKA, IA 50480-0124
PO BOX 125, TITONKA, IA 50480-0125
PO BOX 126, TITONKA, IA 50480-0126
PO BOX 127, TITONKA, IA 50480-0127
PO BOX 128, TITONKA, IA 50480-0128
PO BOX 129, TITONKA, IA 50480-0129
PO BOX 130, TITONKA, IA 50480-0130
PO BOX 131, TITONKA, IA 50480-0131
PO BOX 132, TITONKA, IA 50480-0132
PO BOX 133, TITONKA, IA 50480-0133
PO BOX 134, TITONKA, IA 50480-0134
PO BOX 135, TITONKA, IA 50480-0135
PO BOX 136, TITONKA, IA 50480-0136
PO BOX 137, TITONKA, IA 50480-0137
PO BOX 138, TITONKA, IA 50480-0138
PO BOX 139, TITONKA, IA 50480-0139
PO BOX 140, TITONKA, IA 50480-0140
PO BOX 141, TITONKA, IA 50480-0141
PO BOX 142, TITONKA, IA 50480-0142
PO BOX 143, TITONKA, IA 50480-0143
PO BOX 144, TITONKA, IA 50480-0144
PO BOX 145, TITONKA, IA 50480-0145
PO BOX 146, TITONKA, IA 50480-0146
PO BOX 147, TITONKA, IA 50480-0147
PO BOX 148, TITONKA, IA 50480-0148
PO BOX 149, TITONKA, IA 50480-0149
PO BOX 150, TITONKA, IA 50480-0150
PO BOX 151, TITONKA, IA 50480-0151
PO BOX 152, TITONKA, IA 50480-0152
PO BOX 153, TITONKA, IA 50480-0153
PO BOX 154, TITONKA, IA 50480-0154
PO BOX 155, TITONKA, IA 50480-0155
PO BOX 156, TITONKA, IA 50480-0156
PO BOX 157, TITONKA, IA 50480-0157
PO BOX 158, TITONKA, IA 50480-0158
PO BOX 159, TITONKA, IA 50480-0159
PO BOX 160, TITONKA, IA 50480-0160
PO BOX 161, TITONKA, IA 50480-0161
PO BOX 162, TITONKA, IA 50480-0162
PO BOX 163, TITONKA, IA 50480-0163
PO BOX 164, TITONKA, IA 50480-0164
PO BOX 165, TITONKA, IA 50480-0165
PO BOX 166, TITONKA, IA 50480-0166
PO BOX 167, TITONKA, IA 50480-0167
PO BOX 168, TITONKA, IA 50480-0168
PO BOX 169, TITONKA, IA 50480-0169
PO BOX 170, TITONKA, IA 50480-0170
PO BOX 171, TITONKA, IA 50480-0171
PO BOX 172, TITONKA, IA 50480-0172
PO BOX 173, TITONKA, IA 50480-0173
PO BOX 174, TITONKA, IA 50480-0174
PO BOX 175, TITONKA, IA 50480-0175
PO BOX 176, TITONKA, IA 50480-0176
PO BOX 177, TITONKA, IA 50480-0177
PO BOX 178, TITONKA, IA 50480-0178
PO BOX 179, TITONKA, IA 50480-0179
PO BOX 180, TITONKA, IA 50480-0180
PO BOX 181, TITONKA, IA 50480-0181
PO BOX 182, TITONKA, IA 50480-0182
PO BOX 183, TITONKA, IA 50480-0183
PO BOX 184, TITONKA, IA 50480-0184
PO BOX 185, TITONKA, IA 50480-0185
PO BOX 186, TITONKA, IA 50480-0186
PO BOX 187, TITONKA, IA 50480-0187
PO BOX 188, TITONKA, IA 50480-0188
PO BOX 189, TITONKA, IA 50480-0189
PO BOX 190, TITONKA, IA 50480-0190
PO BOX 191, TITONKA, IA 50480-0191
PO BOX 192, TITONKA, IA 50480-0192
PO BOX 193, TITONKA, IA 50480-0193
PO BOX 194, TITONKA, IA 50480-0194
PO BOX 195, TITONKA, IA 50480-0195
PO BOX 196, TITONKA, IA 50480-0196
PO BOX 197, TITONKA, IA 50480-0197
PO BOX 198, TITONKA, IA 50480-0198
PO BOX 199, TITONKA, IA 50480-0199
PO BOX 200, TITONKA, IA 50480-0200
PO BOX 201, TITONKA, IA 50480-0201
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