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 21, SHELDON, IA 51201-0021
PO BOX 22, SHELDON, IA 51201-0022
PO BOX 23, SHELDON, IA 51201-0023
PO BOX 24, SHELDON, IA 51201-0024
PO BOX 25, SHELDON, IA 51201-0025
PO BOX 26, SHELDON, IA 51201-0026
PO BOX 27, SHELDON, IA 51201-0027
PO BOX 28, SHELDON, IA 51201-0028
PO BOX 29, SHELDON, IA 51201-0029
PO BOX 30, SHELDON, IA 51201-0030
PO BOX 31, SHELDON, IA 51201-0031
PO BOX 32, SHELDON, IA 51201-0032
PO BOX 33, SHELDON, IA 51201-0033
PO BOX 34, SHELDON, IA 51201-0034
PO BOX 35, SHELDON, IA 51201-0035
PO BOX 36, SHELDON, IA 51201-0036
PO BOX 37, SHELDON, IA 51201-0037
PO BOX 38, SHELDON, IA 51201-0038
PO BOX 39, SHELDON, IA 51201-0039
PO BOX 40, SHELDON, IA 51201-0040
PO BOX 41, SHELDON, IA 51201-0041
PO BOX 42, SHELDON, IA 51201-0042
PO BOX 43, SHELDON, IA 51201-0043
PO BOX 44, SHELDON, IA 51201-0044
PO BOX 45, SHELDON, IA 51201-0045
PO BOX 46, SHELDON, IA 51201-0046
PO BOX 47, SHELDON, IA 51201-0047
PO BOX 48, SHELDON, IA 51201-0048
PO BOX 49, SHELDON, IA 51201-0049
PO BOX 50, SHELDON, IA 51201-0050
PO BOX 51, SHELDON, IA 51201-0051
PO BOX 52, SHELDON, IA 51201-0052
PO BOX 53, SHELDON, IA 51201-0053
PO BOX 54, SHELDON, IA 51201-0054
PO BOX 55, SHELDON, IA 51201-0055
PO BOX 56, SHELDON, IA 51201-0056
PO BOX 57, SHELDON, IA 51201-0057
PO BOX 58, SHELDON, IA 51201-0058
PO BOX 59, SHELDON, IA 51201-0059
PO BOX 60, SHELDON, IA 51201-0060
PO BOX 61, SHELDON, IA 51201-0061
PO BOX 62, SHELDON, IA 51201-0062
PO BOX 63, SHELDON, IA 51201-0063
PO BOX 64, SHELDON, IA 51201-0064
PO BOX 65, SHELDON, IA 51201-0065
PO BOX 66, SHELDON, IA 51201-0066
PO BOX 67, SHELDON, IA 51201-0067
PO BOX 68, SHELDON, IA 51201-0068
PO BOX 69, SHELDON, IA 51201-0069
PO BOX 70, SHELDON, IA 51201-0070
PO BOX 71, SHELDON, IA 51201-0071
PO BOX 72, SHELDON, IA 51201-0072
PO BOX 73, SHELDON, IA 51201-0073
PO BOX 74, SHELDON, IA 51201-0074
PO BOX 75, SHELDON, IA 51201-0075
PO BOX 76, SHELDON, IA 51201-0076
PO BOX 77, SHELDON, IA 51201-0077
PO BOX 78, SHELDON, IA 51201-0078
PO BOX 79, SHELDON, IA 51201-0079
PO BOX 80, SHELDON, IA 51201-0080
PO BOX 81, SHELDON, IA 51201-0081
PO BOX 82, SHELDON, IA 51201-0082
PO BOX 83, SHELDON, IA 51201-0083
PO BOX 84, SHELDON, IA 51201-0084
PO BOX 85, SHELDON, IA 51201-0085
PO BOX 86, SHELDON, IA 51201-0086
PO BOX 87, SHELDON, IA 51201-0087
PO BOX 88, SHELDON, IA 51201-0088
PO BOX 89, SHELDON, IA 51201-0089
PO BOX 90, SHELDON, IA 51201-0090
PO BOX 91, SHELDON, IA 51201-0091
PO BOX 92, SHELDON, IA 51201-0092
PO BOX 93, SHELDON, IA 51201-0093
PO BOX 94, SHELDON, IA 51201-0094
PO BOX 95, SHELDON, IA 51201-0095
PO BOX 96, SHELDON, IA 51201-0096
PO BOX 97, SHELDON, IA 51201-0097
PO BOX 98, SHELDON, IA 51201-0098
PO BOX 99, SHELDON, IA 51201-0099
PO BOX 100, SHELDON, IA 51201-0100
PO BOX 101, SHELDON, IA 51201-0101
PO BOX 102, SHELDON, IA 51201-0102
PO BOX 103, SHELDON, IA 51201-0103
PO BOX 104, SHELDON, IA 51201-0104
PO BOX 105, SHELDON, IA 51201-0105
PO BOX 106, SHELDON, IA 51201-0106
PO BOX 107, SHELDON, IA 51201-0107
PO BOX 108, SHELDON, IA 51201-0108
PO BOX 109, SHELDON, IA 51201-0109
PO BOX 110, SHELDON, IA 51201-0110
PO BOX 111, SHELDON, IA 51201-0111
PO BOX 112, SHELDON, IA 51201-0112
PO BOX 113, SHELDON, IA 51201-0113
PO BOX 114, SHELDON, IA 51201-0114
PO BOX 115, SHELDON, IA 51201-0115
PO BOX 116, SHELDON, IA 51201-0116
PO BOX 117, SHELDON, IA 51201-0117
PO BOX 118, SHELDON, IA 51201-0118
PO BOX 119, SHELDON, IA 51201-0119
PO BOX 120, SHELDON, IA 51201-0120
PO BOX 121, SHELDON, IA 51201-0121
PO BOX 122, SHELDON, IA 51201-0122
PO BOX 123, SHELDON, IA 51201-0123
PO BOX 124, SHELDON, IA 51201-0124
PO BOX 125, SHELDON, IA 51201-0125
PO BOX 126, SHELDON, IA 51201-0126
PO BOX 127, SHELDON, IA 51201-0127
PO BOX 128, SHELDON, IA 51201-0128
PO BOX 129, SHELDON, IA 51201-0129
PO BOX 130, SHELDON, IA 51201-0130
PO BOX 131, SHELDON, IA 51201-0131
PO BOX 132, SHELDON, IA 51201-0132
PO BOX 133, SHELDON, IA 51201-0133
PO BOX 134, SHELDON, IA 51201-0134
PO BOX 135, SHELDON, IA 51201-0135
PO BOX 136, SHELDON, IA 51201-0136
PO BOX 137, SHELDON, IA 51201-0137
PO BOX 138, SHELDON, IA 51201-0138
PO BOX 139, SHELDON, IA 51201-0139
PO BOX 140, SHELDON, IA 51201-0140
PO BOX 141, SHELDON, IA 51201-0141
PO BOX 142, SHELDON, IA 51201-0142
PO BOX 143, SHELDON, IA 51201-0143
PO BOX 144, SHELDON, IA 51201-0144
PO BOX 145, SHELDON, IA 51201-0145
PO BOX 146, SHELDON, IA 51201-0146
PO BOX 147, SHELDON, IA 51201-0147
PO BOX 148, SHELDON, IA 51201-0148
PO BOX 149, SHELDON, IA 51201-0149
PO BOX 150, SHELDON, IA 51201-0150
PO BOX 151, SHELDON, IA 51201-0151
PO BOX 152, SHELDON, IA 51201-0152
PO BOX 153, SHELDON, IA 51201-0153
PO BOX 154, SHELDON, IA 51201-0154
PO BOX 155, SHELDON, IA 51201-0155
PO BOX 156, SHELDON, IA 51201-0156
PO BOX 157, SHELDON, IA 51201-0157
PO BOX 158, SHELDON, IA 51201-0158
PO BOX 159, SHELDON, IA 51201-0159
PO BOX 160, SHELDON, IA 51201-0160
PO BOX 161, SHELDON, IA 51201-0161
PO BOX 162, SHELDON, IA 51201-0162
PO BOX 163, SHELDON, IA 51201-0163
PO BOX 164, SHELDON, IA 51201-0164
PO BOX 165, SHELDON, IA 51201-0165
PO BOX 166, SHELDON, IA 51201-0166
PO BOX 167, SHELDON, IA 51201-0167
PO BOX 168, SHELDON, IA 51201-0168
PO BOX 169, SHELDON, IA 51201-0169
PO BOX 170, SHELDON, IA 51201-0170
PO BOX 171, SHELDON, IA 51201-0171
PO BOX 172, SHELDON, IA 51201-0172
PO BOX 173, SHELDON, IA 51201-0173
PO BOX 174, SHELDON, IA 51201-0174
PO BOX 175, SHELDON, IA 51201-0175
PO BOX 176, SHELDON, IA 51201-0176
PO BOX 177, SHELDON, IA 51201-0177
PO BOX 178, SHELDON, IA 51201-0178
PO BOX 179, SHELDON, IA 51201-0179
PO BOX 180, SHELDON, IA 51201-0180
PO BOX 181, SHELDON, IA 51201-0181
PO BOX 182, SHELDON, IA 51201-0182
PO BOX 183, SHELDON, IA 51201-0183
PO BOX 184, SHELDON, IA 51201-0184
PO BOX 185, SHELDON, IA 51201-0185
PO BOX 186, SHELDON, IA 51201-0186
PO BOX 187, SHELDON, IA 51201-0187
PO BOX 188, SHELDON, IA 51201-0188
PO BOX 189, SHELDON, IA 51201-0189
PO BOX 190, SHELDON, IA 51201-0190
PO BOX 191, SHELDON, IA 51201-0191
PO BOX 192, SHELDON, IA 51201-0192
PO BOX 193, SHELDON, IA 51201-0193
PO BOX 194, SHELDON, IA 51201-0194
PO BOX 195, SHELDON, IA 51201-0195
PO BOX 196, SHELDON, IA 51201-0196
PO BOX 197, SHELDON, IA 51201-0197
PO BOX 198, SHELDON, IA 51201-0198
PO BOX 199, SHELDON, IA 51201-0199
PO BOX 200, SHELDON, IA 51201-0200
PO BOX 201, SHELDON, IA 51201-0201
PO BOX 202, SHELDON, IA 51201-0202
PO BOX 203, SHELDON, IA 51201-0203
PO BOX 204, SHELDON, IA 51201-0204
PO BOX 205, SHELDON, IA 51201-0205
PO BOX 206, SHELDON, IA 51201-0206
PO BOX 207, SHELDON, IA 51201-0207
PO BOX 208, SHELDON, IA 51201-0208
PO BOX 209, SHELDON, IA 51201-0209
PO BOX 210, SHELDON, IA 51201-0210
PO BOX 211, SHELDON, IA 51201-0211
PO BOX 212, SHELDON, IA 51201-0212
PO BOX 213, SHELDON, IA 51201-0213
PO BOX 214, SHELDON, IA 51201-0214
PO BOX 215, SHELDON, IA 51201-0215
PO BOX 216, SHELDON, IA 51201-0216
PO BOX 217, SHELDON, IA 51201-0217
PO BOX 218, SHELDON, IA 51201-0218
PO BOX 219, SHELDON, IA 51201-0219
PO BOX 220, SHELDON, IA 51201-0220
PO BOX 221, SHELDON, IA 51201-0221
Add new comment