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, COURTLAND, KS 66939-0011
PO BOX 12, COURTLAND, KS 66939-0012
PO BOX 13, COURTLAND, KS 66939-0013
PO BOX 14, COURTLAND, KS 66939-0014
PO BOX 15, COURTLAND, KS 66939-0015
PO BOX 16, COURTLAND, KS 66939-0016
PO BOX 17, COURTLAND, KS 66939-0017
PO BOX 18, COURTLAND, KS 66939-0018
PO BOX 19, COURTLAND, KS 66939-0019
PO BOX 20, COURTLAND, KS 66939-0020
PO BOX 21, COURTLAND, KS 66939-0021
PO BOX 22, COURTLAND, KS 66939-0022
PO BOX 23, COURTLAND, KS 66939-0023
PO BOX 24, COURTLAND, KS 66939-0024
PO BOX 25, COURTLAND, KS 66939-0025
PO BOX 26, COURTLAND, KS 66939-0026
PO BOX 27, COURTLAND, KS 66939-0027
PO BOX 28, COURTLAND, KS 66939-0028
PO BOX 29, COURTLAND, KS 66939-0029
PO BOX 30, COURTLAND, KS 66939-0030
PO BOX 31, COURTLAND, KS 66939-0031
PO BOX 32, COURTLAND, KS 66939-0032
PO BOX 33, COURTLAND, KS 66939-0033
PO BOX 34, COURTLAND, KS 66939-0034
PO BOX 35, COURTLAND, KS 66939-0035
PO BOX 36, COURTLAND, KS 66939-0036
PO BOX 37, COURTLAND, KS 66939-0037
PO BOX 38, COURTLAND, KS 66939-0038
PO BOX 39, COURTLAND, KS 66939-0039
PO BOX 40, COURTLAND, KS 66939-0040
PO BOX 41, COURTLAND, KS 66939-0041
PO BOX 42, COURTLAND, KS 66939-0042
PO BOX 43, COURTLAND, KS 66939-0043
PO BOX 44, COURTLAND, KS 66939-0044
PO BOX 45, COURTLAND, KS 66939-0045
PO BOX 46, COURTLAND, KS 66939-0046
PO BOX 47, COURTLAND, KS 66939-0047
PO BOX 48, COURTLAND, KS 66939-0048
PO BOX 49, COURTLAND, KS 66939-0049
PO BOX 50, COURTLAND, KS 66939-0050
PO BOX 51, COURTLAND, KS 66939-0051
PO BOX 52, COURTLAND, KS 66939-0052
PO BOX 53, COURTLAND, KS 66939-0053
PO BOX 54, COURTLAND, KS 66939-0054
PO BOX 55, COURTLAND, KS 66939-0055
PO BOX 56, COURTLAND, KS 66939-0056
PO BOX 57, COURTLAND, KS 66939-0057
PO BOX 58, COURTLAND, KS 66939-0058
PO BOX 59, COURTLAND, KS 66939-0059
PO BOX 60, COURTLAND, KS 66939-0060
PO BOX 61, COURTLAND, KS 66939-0061
PO BOX 62, COURTLAND, KS 66939-0062
PO BOX 63, COURTLAND, KS 66939-0063
PO BOX 64, COURTLAND, KS 66939-0064
PO BOX 65, COURTLAND, KS 66939-0065
PO BOX 66, COURTLAND, KS 66939-0066
PO BOX 67, COURTLAND, KS 66939-0067
PO BOX 68, COURTLAND, KS 66939-0068
PO BOX 69, COURTLAND, KS 66939-0069
PO BOX 70, COURTLAND, KS 66939-0070
PO BOX 71, COURTLAND, KS 66939-0071
PO BOX 72, COURTLAND, KS 66939-0072
PO BOX 73, COURTLAND, KS 66939-0073
PO BOX 74, COURTLAND, KS 66939-0074
PO BOX 75, COURTLAND, KS 66939-0075
PO BOX 76, COURTLAND, KS 66939-0076
PO BOX 77, COURTLAND, KS 66939-0077
PO BOX 78, COURTLAND, KS 66939-0078
PO BOX 79, COURTLAND, KS 66939-0079
PO BOX 80, COURTLAND, KS 66939-0080
PO BOX 81, COURTLAND, KS 66939-0081
PO BOX 82, COURTLAND, KS 66939-0082
PO BOX 83, COURTLAND, KS 66939-0083
PO BOX 84, COURTLAND, KS 66939-0084
PO BOX 85, COURTLAND, KS 66939-0085
PO BOX 86, COURTLAND, KS 66939-0086
PO BOX 87, COURTLAND, KS 66939-0087
PO BOX 88, COURTLAND, KS 66939-0088
PO BOX 89, COURTLAND, KS 66939-0089
PO BOX 90, COURTLAND, KS 66939-0090
PO BOX 91, COURTLAND, KS 66939-0091
PO BOX 92, COURTLAND, KS 66939-0092
PO BOX 93, COURTLAND, KS 66939-0093
PO BOX 94, COURTLAND, KS 66939-0094
PO BOX 95, COURTLAND, KS 66939-0095
PO BOX 96, COURTLAND, KS 66939-0096
PO BOX 97, COURTLAND, KS 66939-0097
PO BOX 98, COURTLAND, KS 66939-0098
PO BOX 99, COURTLAND, KS 66939-0099
PO BOX 100, COURTLAND, KS 66939-0100
PO BOX 101, COURTLAND, KS 66939-0101
PO BOX 102, COURTLAND, KS 66939-0102
PO BOX 103, COURTLAND, KS 66939-0103
PO BOX 104, COURTLAND, KS 66939-0104
PO BOX 105, COURTLAND, KS 66939-0105
PO BOX 106, COURTLAND, KS 66939-0106
PO BOX 107, COURTLAND, KS 66939-0107
PO BOX 108, COURTLAND, KS 66939-0108
PO BOX 109, COURTLAND, KS 66939-0109
PO BOX 110, COURTLAND, KS 66939-0110
PO BOX 111, COURTLAND, KS 66939-0111
PO BOX 112, COURTLAND, KS 66939-0112
PO BOX 113, COURTLAND, KS 66939-0113
PO BOX 114, COURTLAND, KS 66939-0114
PO BOX 115, COURTLAND, KS 66939-0115
PO BOX 116, COURTLAND, KS 66939-0116
PO BOX 117, COURTLAND, KS 66939-0117
PO BOX 118, COURTLAND, KS 66939-0118
PO BOX 119, COURTLAND, KS 66939-0119
PO BOX 120, COURTLAND, KS 66939-0120
PO BOX 121, COURTLAND, KS 66939-0121
PO BOX 122, COURTLAND, KS 66939-0122
PO BOX 123, COURTLAND, KS 66939-0123
PO BOX 124, COURTLAND, KS 66939-0124
PO BOX 125, COURTLAND, KS 66939-0125
PO BOX 126, COURTLAND, KS 66939-0126
PO BOX 127, COURTLAND, KS 66939-0127
PO BOX 128, COURTLAND, KS 66939-0128
PO BOX 129, COURTLAND, KS 66939-0129
PO BOX 130, COURTLAND, KS 66939-0130
PO BOX 131, COURTLAND, KS 66939-0131
PO BOX 132, COURTLAND, KS 66939-0132
PO BOX 133, COURTLAND, KS 66939-0133
PO BOX 134, COURTLAND, KS 66939-0134
PO BOX 135, COURTLAND, KS 66939-0135
PO BOX 136, COURTLAND, KS 66939-0136
PO BOX 137, COURTLAND, KS 66939-0137
PO BOX 138, COURTLAND, KS 66939-0138
PO BOX 139, COURTLAND, KS 66939-0139
PO BOX 140, COURTLAND, KS 66939-0140
PO BOX 141, COURTLAND, KS 66939-0141
PO BOX 142, COURTLAND, KS 66939-0142
PO BOX 143, COURTLAND, KS 66939-0143
PO BOX 144, COURTLAND, KS 66939-0144
PO BOX 145, COURTLAND, KS 66939-0145
PO BOX 146, COURTLAND, KS 66939-0146
PO BOX 147, COURTLAND, KS 66939-0147
PO BOX 148, COURTLAND, KS 66939-0148
PO BOX 149, COURTLAND, KS 66939-0149
PO BOX 150, COURTLAND, KS 66939-0150
PO BOX 151, COURTLAND, KS 66939-0151
PO BOX 152, COURTLAND, KS 66939-0152
PO BOX 153, COURTLAND, KS 66939-0153
PO BOX 154, COURTLAND, KS 66939-0154
PO BOX 155, COURTLAND, KS 66939-0155
PO BOX 156, COURTLAND, KS 66939-0156
PO BOX 157, COURTLAND, KS 66939-0157
PO BOX 158, COURTLAND, KS 66939-0158
PO BOX 159, COURTLAND, KS 66939-0159
PO BOX 160, COURTLAND, KS 66939-0160
PO BOX 161, COURTLAND, KS 66939-0161
PO BOX 162, COURTLAND, KS 66939-0162
PO BOX 163, COURTLAND, KS 66939-0163
PO BOX 164, COURTLAND, KS 66939-0164
PO BOX 165, COURTLAND, KS 66939-0165
PO BOX 166, COURTLAND, KS 66939-0166
PO BOX 167, COURTLAND, KS 66939-0167
PO BOX 168, COURTLAND, KS 66939-0168
PO BOX 169, COURTLAND, KS 66939-0169
PO BOX 170, COURTLAND, KS 66939-0170
PO BOX 171, COURTLAND, KS 66939-0171
PO BOX 172, COURTLAND, KS 66939-0172
PO BOX 173, COURTLAND, KS 66939-0173
PO BOX 174, COURTLAND, KS 66939-0174
PO BOX 175, COURTLAND, KS 66939-0175
PO BOX 176, COURTLAND, KS 66939-0176
PO BOX 177, COURTLAND, KS 66939-0177
PO BOX 178, COURTLAND, KS 66939-0178
PO BOX 179, COURTLAND, KS 66939-0179
PO BOX 180, COURTLAND, KS 66939-0180
PO BOX 181, COURTLAND, KS 66939-0181
PO BOX 182, COURTLAND, KS 66939-0182
PO BOX 183, COURTLAND, KS 66939-0183
PO BOX 184, COURTLAND, KS 66939-0184
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