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, BLAIR, OK 73526-0001
PO BOX 2, BLAIR, OK 73526-0002
PO BOX 3, BLAIR, OK 73526-0003
PO BOX 4, BLAIR, OK 73526-0004
PO BOX 5, BLAIR, OK 73526-0005
PO BOX 6, BLAIR, OK 73526-0006
PO BOX 7, BLAIR, OK 73526-0007
PO BOX 8, BLAIR, OK 73526-0008
PO BOX 9, BLAIR, OK 73526-0009
PO BOX 10, BLAIR, OK 73526-0010
PO BOX 11, BLAIR, OK 73526-0011
PO BOX 12, BLAIR, OK 73526-0012
PO BOX 13, BLAIR, OK 73526-0013
PO BOX 14, BLAIR, OK 73526-0014
PO BOX 15, BLAIR, OK 73526-0015
PO BOX 16, BLAIR, OK 73526-0016
PO BOX 17, BLAIR, OK 73526-0017
PO BOX 18, BLAIR, OK 73526-0018
PO BOX 19, BLAIR, OK 73526-0019
PO BOX 20, BLAIR, OK 73526-0020
PO BOX 21, BLAIR, OK 73526-0021
PO BOX 22, BLAIR, OK 73526-0022
PO BOX 23, BLAIR, OK 73526-0023
PO BOX 24, BLAIR, OK 73526-0024
PO BOX 25, BLAIR, OK 73526-0025
PO BOX 26, BLAIR, OK 73526-0026
PO BOX 27, BLAIR, OK 73526-0027
PO BOX 28, BLAIR, OK 73526-0028
PO BOX 29, BLAIR, OK 73526-0029
PO BOX 30, BLAIR, OK 73526-0030
PO BOX 31, BLAIR, OK 73526-0031
PO BOX 32, BLAIR, OK 73526-0032
PO BOX 33, BLAIR, OK 73526-0033
PO BOX 34, BLAIR, OK 73526-0034
PO BOX 35, BLAIR, OK 73526-0035
PO BOX 36, BLAIR, OK 73526-0036
PO BOX 37, BLAIR, OK 73526-0037
PO BOX 38, BLAIR, OK 73526-0038
PO BOX 39, BLAIR, OK 73526-0039
PO BOX 40, BLAIR, OK 73526-0040
PO BOX 41, BLAIR, OK 73526-0041
PO BOX 42, BLAIR, OK 73526-0042
PO BOX 43, BLAIR, OK 73526-0043
PO BOX 44, BLAIR, OK 73526-0044
PO BOX 45, BLAIR, OK 73526-0045
PO BOX 46, BLAIR, OK 73526-0046
PO BOX 47, BLAIR, OK 73526-0047
PO BOX 48, BLAIR, OK 73526-0048
PO BOX 49, BLAIR, OK 73526-0049
PO BOX 50, BLAIR, OK 73526-0050
PO BOX 51, BLAIR, OK 73526-0051
PO BOX 52, BLAIR, OK 73526-0052
PO BOX 53, BLAIR, OK 73526-0053
PO BOX 54, BLAIR, OK 73526-0054
PO BOX 55, BLAIR, OK 73526-0055
PO BOX 56, BLAIR, OK 73526-0056
PO BOX 57, BLAIR, OK 73526-0057
PO BOX 58, BLAIR, OK 73526-0058
PO BOX 59, BLAIR, OK 73526-0059
PO BOX 60, BLAIR, OK 73526-0060
PO BOX 61, BLAIR, OK 73526-0061
PO BOX 62, BLAIR, OK 73526-0062
PO BOX 63, BLAIR, OK 73526-0063
PO BOX 64, BLAIR, OK 73526-0064
PO BOX 65, BLAIR, OK 73526-0065
PO BOX 66, BLAIR, OK 73526-0066
PO BOX 67, BLAIR, OK 73526-0067
PO BOX 68, BLAIR, OK 73526-0068
PO BOX 69, BLAIR, OK 73526-0069
PO BOX 70, BLAIR, OK 73526-0070
PO BOX 71, BLAIR, OK 73526-0071
PO BOX 72, BLAIR, OK 73526-0072
PO BOX 73, BLAIR, OK 73526-0073
PO BOX 74, BLAIR, OK 73526-0074
PO BOX 75, BLAIR, OK 73526-0075
PO BOX 76, BLAIR, OK 73526-0076
PO BOX 77, BLAIR, OK 73526-0077
PO BOX 78, BLAIR, OK 73526-0078
PO BOX 79, BLAIR, OK 73526-0079
PO BOX 80, BLAIR, OK 73526-0080
PO BOX 81, BLAIR, OK 73526-0081
PO BOX 82, BLAIR, OK 73526-0082
PO BOX 83, BLAIR, OK 73526-0083
PO BOX 84, BLAIR, OK 73526-0084
PO BOX 85, BLAIR, OK 73526-0085
PO BOX 86, BLAIR, OK 73526-0086
PO BOX 87, BLAIR, OK 73526-0087
PO BOX 88, BLAIR, OK 73526-0088
PO BOX 89, BLAIR, OK 73526-0089
PO BOX 90, BLAIR, OK 73526-0090
PO BOX 91, BLAIR, OK 73526-0091
PO BOX 92, BLAIR, OK 73526-0092
PO BOX 93, BLAIR, OK 73526-0093
PO BOX 94, BLAIR, OK 73526-0094
PO BOX 95, BLAIR, OK 73526-0095
PO BOX 96, BLAIR, OK 73526-0096
PO BOX 97, BLAIR, OK 73526-0097
PO BOX 98, BLAIR, OK 73526-0098
PO BOX 99, BLAIR, OK 73526-0099
PO BOX 100, BLAIR, OK 73526-0100
PO BOX 101, BLAIR, OK 73526-0101
PO BOX 102, BLAIR, OK 73526-0102
PO BOX 103, BLAIR, OK 73526-0103
PO BOX 104, BLAIR, OK 73526-0104
PO BOX 105, BLAIR, OK 73526-0105
PO BOX 106, BLAIR, OK 73526-0106
PO BOX 107, BLAIR, OK 73526-0107
PO BOX 108, BLAIR, OK 73526-0108
PO BOX 109, BLAIR, OK 73526-0109
PO BOX 110, BLAIR, OK 73526-0110
PO BOX 111, BLAIR, OK 73526-0111
PO BOX 112, BLAIR, OK 73526-0112
PO BOX 113, BLAIR, OK 73526-0113
PO BOX 114, BLAIR, OK 73526-0114
PO BOX 115, BLAIR, OK 73526-0115
PO BOX 116, BLAIR, OK 73526-0116
PO BOX 117, BLAIR, OK 73526-0117
PO BOX 118, BLAIR, OK 73526-0118
PO BOX 119, BLAIR, OK 73526-0119
PO BOX 120, BLAIR, OK 73526-0120
PO BOX 121, BLAIR, OK 73526-0121
PO BOX 122, BLAIR, OK 73526-0122
PO BOX 123, BLAIR, OK 73526-0123
PO BOX 124, BLAIR, OK 73526-0124
PO BOX 125, BLAIR, OK 73526-0125
PO BOX 126, BLAIR, OK 73526-0126
PO BOX 127, BLAIR, OK 73526-0127
PO BOX 128, BLAIR, OK 73526-0128
PO BOX 129, BLAIR, OK 73526-0129
PO BOX 130, BLAIR, OK 73526-0130
PO BOX 131, BLAIR, OK 73526-0131
PO BOX 132, BLAIR, OK 73526-0132
PO BOX 133, BLAIR, OK 73526-0133
PO BOX 134, BLAIR, OK 73526-0134
PO BOX 135, BLAIR, OK 73526-0135
PO BOX 136, BLAIR, OK 73526-0136
PO BOX 137, BLAIR, OK 73526-0137
PO BOX 138, BLAIR, OK 73526-0138
PO BOX 139, BLAIR, OK 73526-0139
PO BOX 140, BLAIR, OK 73526-0140
PO BOX 141, BLAIR, OK 73526-0141
PO BOX 142, BLAIR, OK 73526-0142
PO BOX 143, BLAIR, OK 73526-0143
PO BOX 144, BLAIR, OK 73526-0144
PO BOX 145, BLAIR, OK 73526-0145
PO BOX 146, BLAIR, OK 73526-0146
PO BOX 147, BLAIR, OK 73526-0147
PO BOX 148, BLAIR, OK 73526-0148
PO BOX 149, BLAIR, OK 73526-0149
PO BOX 150, BLAIR, OK 73526-0150
PO BOX 151, BLAIR, OK 73526-0151
PO BOX 152, BLAIR, OK 73526-0152
PO BOX 153, BLAIR, OK 73526-0153
PO BOX 154, BLAIR, OK 73526-0154
PO BOX 155, BLAIR, OK 73526-0155
PO BOX 156, BLAIR, OK 73526-0156
PO BOX 157, BLAIR, OK 73526-0157
PO BOX 158, BLAIR, OK 73526-0158
PO BOX 159, BLAIR, OK 73526-0159
PO BOX 160, BLAIR, OK 73526-0160
PO BOX 161, BLAIR, OK 73526-0161
PO BOX 162, BLAIR, OK 73526-0162
PO BOX 163, BLAIR, OK 73526-0163
PO BOX 164, BLAIR, OK 73526-0164
PO BOX 165, BLAIR, OK 73526-0165
PO BOX 166, BLAIR, OK 73526-0166
PO BOX 167, BLAIR, OK 73526-0167
PO BOX 168, BLAIR, OK 73526-0168
PO BOX 169, BLAIR, OK 73526-0169
PO BOX 170, BLAIR, OK 73526-0170
PO BOX 171, BLAIR, OK 73526-0171
PO BOX 172, BLAIR, OK 73526-0172
PO BOX 173, BLAIR, OK 73526-0173
PO BOX 174, BLAIR, OK 73526-0174
PO BOX 175, BLAIR, OK 73526-0175
PO BOX 176, BLAIR, OK 73526-0176
PO BOX 177, BLAIR, OK 73526-0177
PO BOX 178, BLAIR, OK 73526-0178
PO BOX 179, BLAIR, OK 73526-0179
PO BOX 180, BLAIR, OK 73526-0180
PO BOX 181, BLAIR, OK 73526-0181
PO BOX 182, BLAIR, OK 73526-0182
PO BOX 183, BLAIR, OK 73526-0183
PO BOX 184, BLAIR, OK 73526-0184
PO BOX 185, BLAIR, OK 73526-0185
PO BOX 186, BLAIR, OK 73526-0186
PO BOX 187, BLAIR, OK 73526-0187
PO BOX 188, BLAIR, OK 73526-0188
PO BOX 189, BLAIR, OK 73526-0189
PO BOX 190, BLAIR, OK 73526-0190
PO BOX 191, BLAIR, OK 73526-0191
PO BOX 192, BLAIR, OK 73526-0192
PO BOX 193, BLAIR, OK 73526-0193
PO BOX 194, BLAIR, OK 73526-0194
PO BOX 195, BLAIR, OK 73526-0195
PO BOX 196, BLAIR, OK 73526-0196
PO BOX 197, BLAIR, OK 73526-0197
PO BOX 198, BLAIR, OK 73526-0198
PO BOX 199, BLAIR, OK 73526-0199
PO BOX 200, BLAIR, OK 73526-0200
PO BOX 201, BLAIR, OK 73526-0201
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