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, BIRD CITY, KS 67731-0001
PO BOX 2, BIRD CITY, KS 67731-0002
PO BOX 3, BIRD CITY, KS 67731-0003
PO BOX 4, BIRD CITY, KS 67731-0004
PO BOX 5, BIRD CITY, KS 67731-0005
PO BOX 6, BIRD CITY, KS 67731-0006
PO BOX 7, BIRD CITY, KS 67731-0007
PO BOX 8, BIRD CITY, KS 67731-0008
PO BOX 9, BIRD CITY, KS 67731-0009
PO BOX 10, BIRD CITY, KS 67731-0010
PO BOX 11, BIRD CITY, KS 67731-0011
PO BOX 12, BIRD CITY, KS 67731-0012
PO BOX 13, BIRD CITY, KS 67731-0013
PO BOX 14, BIRD CITY, KS 67731-0014
PO BOX 15, BIRD CITY, KS 67731-0015
PO BOX 16, BIRD CITY, KS 67731-0016
PO BOX 17, BIRD CITY, KS 67731-0017
PO BOX 18, BIRD CITY, KS 67731-0018
PO BOX 19, BIRD CITY, KS 67731-0019
PO BOX 20, BIRD CITY, KS 67731-0020
PO BOX 21, BIRD CITY, KS 67731-0021
PO BOX 22, BIRD CITY, KS 67731-0022
PO BOX 23, BIRD CITY, KS 67731-0023
PO BOX 24, BIRD CITY, KS 67731-0024
PO BOX 25, BIRD CITY, KS 67731-0025
PO BOX 26, BIRD CITY, KS 67731-0026
PO BOX 27, BIRD CITY, KS 67731-0027
PO BOX 28, BIRD CITY, KS 67731-0028
PO BOX 29, BIRD CITY, KS 67731-0029
PO BOX 30, BIRD CITY, KS 67731-0030
PO BOX 31, BIRD CITY, KS 67731-0031
PO BOX 32, BIRD CITY, KS 67731-0032
PO BOX 33, BIRD CITY, KS 67731-0033
PO BOX 34, BIRD CITY, KS 67731-0034
PO BOX 35, BIRD CITY, KS 67731-0035
PO BOX 36, BIRD CITY, KS 67731-0036
PO BOX 37, BIRD CITY, KS 67731-0037
PO BOX 38, BIRD CITY, KS 67731-0038
PO BOX 39, BIRD CITY, KS 67731-0039
PO BOX 40, BIRD CITY, KS 67731-0040
PO BOX 41, BIRD CITY, KS 67731-0041
PO BOX 42, BIRD CITY, KS 67731-0042
PO BOX 43, BIRD CITY, KS 67731-0043
PO BOX 44, BIRD CITY, KS 67731-0044
PO BOX 45, BIRD CITY, KS 67731-0045
PO BOX 46, BIRD CITY, KS 67731-0046
PO BOX 47, BIRD CITY, KS 67731-0047
PO BOX 48, BIRD CITY, KS 67731-0048
PO BOX 49, BIRD CITY, KS 67731-0049
PO BOX 50, BIRD CITY, KS 67731-0050
PO BOX 51, BIRD CITY, KS 67731-0051
PO BOX 52, BIRD CITY, KS 67731-0052
PO BOX 53, BIRD CITY, KS 67731-0053
PO BOX 54, BIRD CITY, KS 67731-0054
PO BOX 55, BIRD CITY, KS 67731-0055
PO BOX 56, BIRD CITY, KS 67731-0056
PO BOX 57, BIRD CITY, KS 67731-0057
PO BOX 58, BIRD CITY, KS 67731-0058
PO BOX 59, BIRD CITY, KS 67731-0059
PO BOX 60, BIRD CITY, KS 67731-0060
PO BOX 61, BIRD CITY, KS 67731-0061
PO BOX 62, BIRD CITY, KS 67731-0062
PO BOX 63, BIRD CITY, KS 67731-0063
PO BOX 64, BIRD CITY, KS 67731-0064
PO BOX 65, BIRD CITY, KS 67731-0065
PO BOX 66, BIRD CITY, KS 67731-0066
PO BOX 67, BIRD CITY, KS 67731-0067
PO BOX 68, BIRD CITY, KS 67731-0068
PO BOX 69, BIRD CITY, KS 67731-0069
PO BOX 70, BIRD CITY, KS 67731-0070
PO BOX 71, BIRD CITY, KS 67731-0071
PO BOX 72, BIRD CITY, KS 67731-0072
PO BOX 73, BIRD CITY, KS 67731-0073
PO BOX 74, BIRD CITY, KS 67731-0074
PO BOX 75, BIRD CITY, KS 67731-0075
PO BOX 76, BIRD CITY, KS 67731-0076
PO BOX 77, BIRD CITY, KS 67731-0077
PO BOX 78, BIRD CITY, KS 67731-0078
PO BOX 79, BIRD CITY, KS 67731-0079
PO BOX 80, BIRD CITY, KS 67731-0080
PO BOX 81, BIRD CITY, KS 67731-0081
PO BOX 82, BIRD CITY, KS 67731-0082
PO BOX 83, BIRD CITY, KS 67731-0083
PO BOX 84, BIRD CITY, KS 67731-0084
PO BOX 85, BIRD CITY, KS 67731-0085
PO BOX 86, BIRD CITY, KS 67731-0086
PO BOX 87, BIRD CITY, KS 67731-0087
PO BOX 88, BIRD CITY, KS 67731-0088
PO BOX 89, BIRD CITY, KS 67731-0089
PO BOX 90, BIRD CITY, KS 67731-0090
PO BOX 91, BIRD CITY, KS 67731-0091
PO BOX 92, BIRD CITY, KS 67731-0092
PO BOX 93, BIRD CITY, KS 67731-0093
PO BOX 94, BIRD CITY, KS 67731-0094
PO BOX 95, BIRD CITY, KS 67731-0095
PO BOX 96, BIRD CITY, KS 67731-0096
PO BOX 97, BIRD CITY, KS 67731-0097
PO BOX 98, BIRD CITY, KS 67731-0098
PO BOX 99, BIRD CITY, KS 67731-0099
PO BOX 100, BIRD CITY, KS 67731-0100
PO BOX 101, BIRD CITY, KS 67731-0101
PO BOX 102, BIRD CITY, KS 67731-0102
PO BOX 103, BIRD CITY, KS 67731-0103
PO BOX 104, BIRD CITY, KS 67731-0104
PO BOX 105, BIRD CITY, KS 67731-0105
PO BOX 106, BIRD CITY, KS 67731-0106
PO BOX 107, BIRD CITY, KS 67731-0107
PO BOX 108, BIRD CITY, KS 67731-0108
PO BOX 109, BIRD CITY, KS 67731-0109
PO BOX 110, BIRD CITY, KS 67731-0110
PO BOX 111, BIRD CITY, KS 67731-0111
PO BOX 112, BIRD CITY, KS 67731-0112
PO BOX 113, BIRD CITY, KS 67731-0113
PO BOX 114, BIRD CITY, KS 67731-0114
PO BOX 115, BIRD CITY, KS 67731-0115
PO BOX 116, BIRD CITY, KS 67731-0116
PO BOX 117, BIRD CITY, KS 67731-0117
PO BOX 118, BIRD CITY, KS 67731-0118
PO BOX 119, BIRD CITY, KS 67731-0119
PO BOX 120, BIRD CITY, KS 67731-0120
PO BOX 121, BIRD CITY, KS 67731-0121
PO BOX 122, BIRD CITY, KS 67731-0122
PO BOX 123, BIRD CITY, KS 67731-0123
PO BOX 124, BIRD CITY, KS 67731-0124
PO BOX 125, BIRD CITY, KS 67731-0125
PO BOX 126, BIRD CITY, KS 67731-0126
PO BOX 127, BIRD CITY, KS 67731-0127
PO BOX 128, BIRD CITY, KS 67731-0128
PO BOX 129, BIRD CITY, KS 67731-0129
PO BOX 130, BIRD CITY, KS 67731-0130
PO BOX 131, BIRD CITY, KS 67731-0131
PO BOX 132, BIRD CITY, KS 67731-0132
PO BOX 133, BIRD CITY, KS 67731-0133
PO BOX 134, BIRD CITY, KS 67731-0134
PO BOX 135, BIRD CITY, KS 67731-0135
PO BOX 136, BIRD CITY, KS 67731-0136
PO BOX 137, BIRD CITY, KS 67731-0137
PO BOX 138, BIRD CITY, KS 67731-0138
PO BOX 139, BIRD CITY, KS 67731-0139
PO BOX 140, BIRD CITY, KS 67731-0140
PO BOX 141, BIRD CITY, KS 67731-0141
PO BOX 142, BIRD CITY, KS 67731-0142
PO BOX 143, BIRD CITY, KS 67731-0143
PO BOX 144, BIRD CITY, KS 67731-0144
PO BOX 145, BIRD CITY, KS 67731-0145
PO BOX 146, BIRD CITY, KS 67731-0146
PO BOX 147, BIRD CITY, KS 67731-0147
PO BOX 148, BIRD CITY, KS 67731-0148
PO BOX 149, BIRD CITY, KS 67731-0149
PO BOX 150, BIRD CITY, KS 67731-0150
PO BOX 151, BIRD CITY, KS 67731-0151
PO BOX 152, BIRD CITY, KS 67731-0152
PO BOX 153, BIRD CITY, KS 67731-0153
PO BOX 154, BIRD CITY, KS 67731-0154
PO BOX 155, BIRD CITY, KS 67731-0155
PO BOX 156, BIRD CITY, KS 67731-0156
PO BOX 157, BIRD CITY, KS 67731-0157
PO BOX 158, BIRD CITY, KS 67731-0158
PO BOX 159, BIRD CITY, KS 67731-0159
PO BOX 160, BIRD CITY, KS 67731-0160
PO BOX 161, BIRD CITY, KS 67731-0161
PO BOX 162, BIRD CITY, KS 67731-0162
PO BOX 163, BIRD CITY, KS 67731-0163
PO BOX 164, BIRD CITY, KS 67731-0164
PO BOX 165, BIRD CITY, KS 67731-0165
PO BOX 166, BIRD CITY, KS 67731-0166
PO BOX 167, BIRD CITY, KS 67731-0167
PO BOX 168, BIRD CITY, KS 67731-0168
PO BOX 169, BIRD CITY, KS 67731-0169
PO BOX 170, BIRD CITY, KS 67731-0170
PO BOX 171, BIRD CITY, KS 67731-0171
PO BOX 172, BIRD CITY, KS 67731-0172
PO BOX 173, BIRD CITY, KS 67731-0173
PO BOX 174, BIRD CITY, KS 67731-0174
PO BOX 175, BIRD CITY, KS 67731-0175
PO BOX 176, BIRD CITY, KS 67731-0176
PO BOX 177, BIRD CITY, KS 67731-0177
PO BOX 178, BIRD CITY, KS 67731-0178
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