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, FLETCHER, OK 73541-0021
PO BOX 22, FLETCHER, OK 73541-0022
PO BOX 23, FLETCHER, OK 73541-0023
PO BOX 24, FLETCHER, OK 73541-0024
PO BOX 25, FLETCHER, OK 73541-0025
PO BOX 26, FLETCHER, OK 73541-0026
PO BOX 27, FLETCHER, OK 73541-0027
PO BOX 28, FLETCHER, OK 73541-0028
PO BOX 29, FLETCHER, OK 73541-0029
PO BOX 30, FLETCHER, OK 73541-0030
PO BOX 31, FLETCHER, OK 73541-0031
PO BOX 32, FLETCHER, OK 73541-0032
PO BOX 33, FLETCHER, OK 73541-0033
PO BOX 34, FLETCHER, OK 73541-0034
PO BOX 35, FLETCHER, OK 73541-0035
PO BOX 36, FLETCHER, OK 73541-0036
PO BOX 37, FLETCHER, OK 73541-0037
PO BOX 38, FLETCHER, OK 73541-0038
PO BOX 39, FLETCHER, OK 73541-0039
PO BOX 40, FLETCHER, OK 73541-0040
PO BOX 41, FLETCHER, OK 73541-0041
PO BOX 42, FLETCHER, OK 73541-0042
PO BOX 43, FLETCHER, OK 73541-0043
PO BOX 44, FLETCHER, OK 73541-0044
PO BOX 45, FLETCHER, OK 73541-0045
PO BOX 46, FLETCHER, OK 73541-0046
PO BOX 47, FLETCHER, OK 73541-0047
PO BOX 48, FLETCHER, OK 73541-0048
PO BOX 49, FLETCHER, OK 73541-0049
PO BOX 50, FLETCHER, OK 73541-0050
PO BOX 51, FLETCHER, OK 73541-0051
PO BOX 52, FLETCHER, OK 73541-0052
PO BOX 53, FLETCHER, OK 73541-0053
PO BOX 54, FLETCHER, OK 73541-0054
PO BOX 55, FLETCHER, OK 73541-0055
PO BOX 56, FLETCHER, OK 73541-0056
PO BOX 57, FLETCHER, OK 73541-0057
PO BOX 58, FLETCHER, OK 73541-0058
PO BOX 59, FLETCHER, OK 73541-0059
PO BOX 60, FLETCHER, OK 73541-0060
PO BOX 61, FLETCHER, OK 73541-0061
PO BOX 62, FLETCHER, OK 73541-0062
PO BOX 63, FLETCHER, OK 73541-0063
PO BOX 64, FLETCHER, OK 73541-0064
PO BOX 65, FLETCHER, OK 73541-0065
PO BOX 66, FLETCHER, OK 73541-0066
PO BOX 67, FLETCHER, OK 73541-0067
PO BOX 68, FLETCHER, OK 73541-0068
PO BOX 69, FLETCHER, OK 73541-0069
PO BOX 70, FLETCHER, OK 73541-0070
PO BOX 71, FLETCHER, OK 73541-0071
PO BOX 72, FLETCHER, OK 73541-0072
PO BOX 73, FLETCHER, OK 73541-0073
PO BOX 74, FLETCHER, OK 73541-0074
PO BOX 75, FLETCHER, OK 73541-0075
PO BOX 76, FLETCHER, OK 73541-0076
PO BOX 77, FLETCHER, OK 73541-0077
PO BOX 78, FLETCHER, OK 73541-0078
PO BOX 79, FLETCHER, OK 73541-0079
PO BOX 80, FLETCHER, OK 73541-0080
PO BOX 81, FLETCHER, OK 73541-0081
PO BOX 82, FLETCHER, OK 73541-0082
PO BOX 83, FLETCHER, OK 73541-0083
PO BOX 84, FLETCHER, OK 73541-0084
PO BOX 85, FLETCHER, OK 73541-0085
PO BOX 86, FLETCHER, OK 73541-0086
PO BOX 87, FLETCHER, OK 73541-0087
PO BOX 88, FLETCHER, OK 73541-0088
PO BOX 89, FLETCHER, OK 73541-0089
PO BOX 90, FLETCHER, OK 73541-0090
PO BOX 91, FLETCHER, OK 73541-0091
PO BOX 92, FLETCHER, OK 73541-0092
PO BOX 93, FLETCHER, OK 73541-0093
PO BOX 94, FLETCHER, OK 73541-0094
PO BOX 95, FLETCHER, OK 73541-0095
PO BOX 96, FLETCHER, OK 73541-0096
PO BOX 97, FLETCHER, OK 73541-0097
PO BOX 98, FLETCHER, OK 73541-0098
PO BOX 99, FLETCHER, OK 73541-0099
PO BOX 100, FLETCHER, OK 73541-0100
PO BOX 101, FLETCHER, OK 73541-0101
PO BOX 102, FLETCHER, OK 73541-0102
PO BOX 103, FLETCHER, OK 73541-0103
PO BOX 104, FLETCHER, OK 73541-0104
PO BOX 105, FLETCHER, OK 73541-0105
PO BOX 106, FLETCHER, OK 73541-0106
PO BOX 107, FLETCHER, OK 73541-0107
PO BOX 108, FLETCHER, OK 73541-0108
PO BOX 109, FLETCHER, OK 73541-0109
PO BOX 110, FLETCHER, OK 73541-0110
PO BOX 111, FLETCHER, OK 73541-0111
PO BOX 112, FLETCHER, OK 73541-0112
PO BOX 113, FLETCHER, OK 73541-0113
PO BOX 114, FLETCHER, OK 73541-0114
PO BOX 115, FLETCHER, OK 73541-0115
PO BOX 116, FLETCHER, OK 73541-0116
PO BOX 117, FLETCHER, OK 73541-0117
PO BOX 118, FLETCHER, OK 73541-0118
PO BOX 119, FLETCHER, OK 73541-0119
PO BOX 120, FLETCHER, OK 73541-0120
PO BOX 121, FLETCHER, OK 73541-0121
PO BOX 122, FLETCHER, OK 73541-0122
PO BOX 123, FLETCHER, OK 73541-0123
PO BOX 124, FLETCHER, OK 73541-0124
PO BOX 125, FLETCHER, OK 73541-0125
PO BOX 126, FLETCHER, OK 73541-0126
PO BOX 127, FLETCHER, OK 73541-0127
PO BOX 128, FLETCHER, OK 73541-0128
PO BOX 129, FLETCHER, OK 73541-0129
PO BOX 130, FLETCHER, OK 73541-0130
PO BOX 131, FLETCHER, OK 73541-0131
PO BOX 132, FLETCHER, OK 73541-0132
PO BOX 133, FLETCHER, OK 73541-0133
PO BOX 134, FLETCHER, OK 73541-0134
PO BOX 135, FLETCHER, OK 73541-0135
PO BOX 136, FLETCHER, OK 73541-0136
PO BOX 137, FLETCHER, OK 73541-0137
PO BOX 138, FLETCHER, OK 73541-0138
PO BOX 139, FLETCHER, OK 73541-0139
PO BOX 140, FLETCHER, OK 73541-0140
PO BOX 141, FLETCHER, OK 73541-0141
PO BOX 142, FLETCHER, OK 73541-0142
PO BOX 143, FLETCHER, OK 73541-0143
PO BOX 144, FLETCHER, OK 73541-0144
PO BOX 145, FLETCHER, OK 73541-0145
PO BOX 146, FLETCHER, OK 73541-0146
PO BOX 147, FLETCHER, OK 73541-0147
PO BOX 148, FLETCHER, OK 73541-0148
PO BOX 149, FLETCHER, OK 73541-0149
PO BOX 150, FLETCHER, OK 73541-0150
PO BOX 151, FLETCHER, OK 73541-0151
PO BOX 152, FLETCHER, OK 73541-0152
PO BOX 153, FLETCHER, OK 73541-0153
PO BOX 154, FLETCHER, OK 73541-0154
PO BOX 155, FLETCHER, OK 73541-0155
PO BOX 156, FLETCHER, OK 73541-0156
PO BOX 157, FLETCHER, OK 73541-0157
PO BOX 158, FLETCHER, OK 73541-0158
PO BOX 159, FLETCHER, OK 73541-0159
PO BOX 160, FLETCHER, OK 73541-0160
PO BOX 161, FLETCHER, OK 73541-0161
PO BOX 162, FLETCHER, OK 73541-0162
PO BOX 163, FLETCHER, OK 73541-0163
PO BOX 164, FLETCHER, OK 73541-0164
PO BOX 165, FLETCHER, OK 73541-0165
PO BOX 166, FLETCHER, OK 73541-0166
PO BOX 167, FLETCHER, OK 73541-0167
PO BOX 168, FLETCHER, OK 73541-0168
PO BOX 169, FLETCHER, OK 73541-0169
PO BOX 170, FLETCHER, OK 73541-0170
PO BOX 171, FLETCHER, OK 73541-0171
PO BOX 172, FLETCHER, OK 73541-0172
PO BOX 173, FLETCHER, OK 73541-0173
PO BOX 174, FLETCHER, OK 73541-0174
PO BOX 175, FLETCHER, OK 73541-0175
PO BOX 176, FLETCHER, OK 73541-0176
PO BOX 177, FLETCHER, OK 73541-0177
PO BOX 178, FLETCHER, OK 73541-0178
PO BOX 179, FLETCHER, OK 73541-0179
PO BOX 180, FLETCHER, OK 73541-0180
PO BOX 181, FLETCHER, OK 73541-0181
PO BOX 182, FLETCHER, OK 73541-0182
PO BOX 183, FLETCHER, OK 73541-0183
PO BOX 184, FLETCHER, OK 73541-0184
PO BOX 185, FLETCHER, OK 73541-0185
PO BOX 186, FLETCHER, OK 73541-0186
PO BOX 187, FLETCHER, OK 73541-0187
PO BOX 188, FLETCHER, OK 73541-0188
PO BOX 189, FLETCHER, OK 73541-0189
PO BOX 190, FLETCHER, OK 73541-0190
PO BOX 191, FLETCHER, OK 73541-0191
PO BOX 192, FLETCHER, OK 73541-0192
PO BOX 193, FLETCHER, OK 73541-0193
PO BOX 194, FLETCHER, OK 73541-0194
PO BOX 195, FLETCHER, OK 73541-0195
PO BOX 196, FLETCHER, OK 73541-0196
PO BOX 197, FLETCHER, OK 73541-0197
PO BOX 198, FLETCHER, OK 73541-0198
PO BOX 199, FLETCHER, OK 73541-0199
PO BOX 200, FLETCHER, OK 73541-0200
PO BOX 201, FLETCHER, OK 73541-0201
PO BOX 202, FLETCHER, OK 73541-0202
PO BOX 203, FLETCHER, OK 73541-0203
PO BOX 204, FLETCHER, OK 73541-0204
PO BOX 205, FLETCHER, OK 73541-0205
PO BOX 206, FLETCHER, OK 73541-0206
PO BOX 207, FLETCHER, OK 73541-0207
PO BOX 208, FLETCHER, OK 73541-0208
PO BOX 209, FLETCHER, OK 73541-0209
PO BOX 210, FLETCHER, OK 73541-0210
PO BOX 211, FLETCHER, OK 73541-0211
PO BOX 212, FLETCHER, OK 73541-0212
PO BOX 213, FLETCHER, OK 73541-0213
PO BOX 214, FLETCHER, OK 73541-0214
PO BOX 215, FLETCHER, OK 73541-0215
PO BOX 216, FLETCHER, OK 73541-0216
PO BOX 217, FLETCHER, OK 73541-0217
PO BOX 218, FLETCHER, OK 73541-0218
PO BOX 219, FLETCHER, OK 73541-0219
PO BOX 220, FLETCHER, OK 73541-0220
PO BOX 221, FLETCHER, OK 73541-0221
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