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 31, SALLISAW, OK 74955-0031
PO BOX 32, SALLISAW, OK 74955-0032
PO BOX 33, SALLISAW, OK 74955-0033
PO BOX 34, SALLISAW, OK 74955-0034
PO BOX 35, SALLISAW, OK 74955-0035
PO BOX 36, SALLISAW, OK 74955-0036
PO BOX 37, SALLISAW, OK 74955-0037
PO BOX 38, SALLISAW, OK 74955-0038
PO BOX 39, SALLISAW, OK 74955-0039
PO BOX 40, SALLISAW, OK 74955-0040
PO BOX 41, SALLISAW, OK 74955-0041
PO BOX 42, SALLISAW, OK 74955-0042
PO BOX 43, SALLISAW, OK 74955-0043
PO BOX 44, SALLISAW, OK 74955-0044
PO BOX 45, SALLISAW, OK 74955-0045
PO BOX 46, SALLISAW, OK 74955-0046
PO BOX 47, SALLISAW, OK 74955-0047
PO BOX 48, SALLISAW, OK 74955-0048
PO BOX 49, SALLISAW, OK 74955-0049
PO BOX 50, SALLISAW, OK 74955-0050
PO BOX 51, SALLISAW, OK 74955-0051
PO BOX 52, SALLISAW, OK 74955-0052
PO BOX 53, SALLISAW, OK 74955-0053
PO BOX 54, SALLISAW, OK 74955-0054
PO BOX 55, SALLISAW, OK 74955-0055
PO BOX 56, SALLISAW, OK 74955-0056
PO BOX 57, SALLISAW, OK 74955-0057
PO BOX 58, SALLISAW, OK 74955-0058
PO BOX 59, SALLISAW, OK 74955-0059
PO BOX 60, SALLISAW, OK 74955-0060
PO BOX 61, SALLISAW, OK 74955-0061
PO BOX 62, SALLISAW, OK 74955-0062
PO BOX 63, SALLISAW, OK 74955-0063
PO BOX 64, SALLISAW, OK 74955-0064
PO BOX 65, SALLISAW, OK 74955-0065
PO BOX 66, SALLISAW, OK 74955-0066
PO BOX 67, SALLISAW, OK 74955-0067
PO BOX 68, SALLISAW, OK 74955-0068
PO BOX 69, SALLISAW, OK 74955-0069
PO BOX 70, SALLISAW, OK 74955-0070
PO BOX 71, SALLISAW, OK 74955-0071
PO BOX 72, SALLISAW, OK 74955-0072
PO BOX 73, SALLISAW, OK 74955-0073
PO BOX 74, SALLISAW, OK 74955-0074
PO BOX 75, SALLISAW, OK 74955-0075
PO BOX 76, SALLISAW, OK 74955-0076
PO BOX 77, SALLISAW, OK 74955-0077
PO BOX 78, SALLISAW, OK 74955-0078
PO BOX 79, SALLISAW, OK 74955-0079
PO BOX 80, SALLISAW, OK 74955-0080
PO BOX 81, SALLISAW, OK 74955-0081
PO BOX 82, SALLISAW, OK 74955-0082
PO BOX 83, SALLISAW, OK 74955-0083
PO BOX 84, SALLISAW, OK 74955-0084
PO BOX 85, SALLISAW, OK 74955-0085
PO BOX 86, SALLISAW, OK 74955-0086
PO BOX 87, SALLISAW, OK 74955-0087
PO BOX 88, SALLISAW, OK 74955-0088
PO BOX 89, SALLISAW, OK 74955-0089
PO BOX 90, SALLISAW, OK 74955-0090
PO BOX 91, SALLISAW, OK 74955-0091
PO BOX 92, SALLISAW, OK 74955-0092
PO BOX 93, SALLISAW, OK 74955-0093
PO BOX 94, SALLISAW, OK 74955-0094
PO BOX 95, SALLISAW, OK 74955-0095
PO BOX 96, SALLISAW, OK 74955-0096
PO BOX 97, SALLISAW, OK 74955-0097
PO BOX 98, SALLISAW, OK 74955-0098
PO BOX 99, SALLISAW, OK 74955-0099
PO BOX 100, SALLISAW, OK 74955-0100
PO BOX 101, SALLISAW, OK 74955-0101
PO BOX 102, SALLISAW, OK 74955-0102
PO BOX 103, SALLISAW, OK 74955-0103
PO BOX 104, SALLISAW, OK 74955-0104
PO BOX 105, SALLISAW, OK 74955-0105
PO BOX 106, SALLISAW, OK 74955-0106
PO BOX 107, SALLISAW, OK 74955-0107
PO BOX 108, SALLISAW, OK 74955-0108
PO BOX 109, SALLISAW, OK 74955-0109
PO BOX 110, SALLISAW, OK 74955-0110
PO BOX 111, SALLISAW, OK 74955-0111
PO BOX 112, SALLISAW, OK 74955-0112
PO BOX 113, SALLISAW, OK 74955-0113
PO BOX 114, SALLISAW, OK 74955-0114
PO BOX 115, SALLISAW, OK 74955-0115
PO BOX 116, SALLISAW, OK 74955-0116
PO BOX 117, SALLISAW, OK 74955-0117
PO BOX 118, SALLISAW, OK 74955-0118
PO BOX 119, SALLISAW, OK 74955-0119
PO BOX 120, SALLISAW, OK 74955-0120
PO BOX 121, SALLISAW, OK 74955-0121
PO BOX 122, SALLISAW, OK 74955-0122
PO BOX 123, SALLISAW, OK 74955-0123
PO BOX 124, SALLISAW, OK 74955-0124
PO BOX 125, SALLISAW, OK 74955-0125
PO BOX 126, SALLISAW, OK 74955-0126
PO BOX 127, SALLISAW, OK 74955-0127
PO BOX 128, SALLISAW, OK 74955-0128
PO BOX 129, SALLISAW, OK 74955-0129
PO BOX 130, SALLISAW, OK 74955-0130
PO BOX 131, SALLISAW, OK 74955-0131
PO BOX 132, SALLISAW, OK 74955-0132
PO BOX 133, SALLISAW, OK 74955-0133
PO BOX 134, SALLISAW, OK 74955-0134
PO BOX 135, SALLISAW, OK 74955-0135
PO BOX 136, SALLISAW, OK 74955-0136
PO BOX 137, SALLISAW, OK 74955-0137
PO BOX 138, SALLISAW, OK 74955-0138
PO BOX 139, SALLISAW, OK 74955-0139
PO BOX 140, SALLISAW, OK 74955-0140
PO BOX 141, SALLISAW, OK 74955-0141
PO BOX 142, SALLISAW, OK 74955-0142
PO BOX 143, SALLISAW, OK 74955-0143
PO BOX 144, SALLISAW, OK 74955-0144
PO BOX 145, SALLISAW, OK 74955-0145
PO BOX 146, SALLISAW, OK 74955-0146
PO BOX 147, SALLISAW, OK 74955-0147
PO BOX 148, SALLISAW, OK 74955-0148
PO BOX 149, SALLISAW, OK 74955-0149
PO BOX 150, SALLISAW, OK 74955-0150
PO BOX 151, SALLISAW, OK 74955-0151
PO BOX 152, SALLISAW, OK 74955-0152
PO BOX 153, SALLISAW, OK 74955-0153
PO BOX 154, SALLISAW, OK 74955-0154
PO BOX 155, SALLISAW, OK 74955-0155
PO BOX 156, SALLISAW, OK 74955-0156
PO BOX 157, SALLISAW, OK 74955-0157
PO BOX 158, SALLISAW, OK 74955-0158
PO BOX 159, SALLISAW, OK 74955-0159
PO BOX 160, SALLISAW, OK 74955-0160
PO BOX 161, SALLISAW, OK 74955-0161
PO BOX 162, SALLISAW, OK 74955-0162
PO BOX 163, SALLISAW, OK 74955-0163
PO BOX 164, SALLISAW, OK 74955-0164
PO BOX 165, SALLISAW, OK 74955-0165
PO BOX 166, SALLISAW, OK 74955-0166
PO BOX 167, SALLISAW, OK 74955-0167
PO BOX 168, SALLISAW, OK 74955-0168
PO BOX 169, SALLISAW, OK 74955-0169
PO BOX 170, SALLISAW, OK 74955-0170
PO BOX 171, SALLISAW, OK 74955-0171
PO BOX 172, SALLISAW, OK 74955-0172
PO BOX 173, SALLISAW, OK 74955-0173
PO BOX 174, SALLISAW, OK 74955-0174
PO BOX 175, SALLISAW, OK 74955-0175
PO BOX 176, SALLISAW, OK 74955-0176
PO BOX 177, SALLISAW, OK 74955-0177
PO BOX 178, SALLISAW, OK 74955-0178
PO BOX 179, SALLISAW, OK 74955-0179
PO BOX 180, SALLISAW, OK 74955-0180
PO BOX 181, SALLISAW, OK 74955-0181
PO BOX 182, SALLISAW, OK 74955-0182
PO BOX 183, SALLISAW, OK 74955-0183
PO BOX 184, SALLISAW, OK 74955-0184
PO BOX 185, SALLISAW, OK 74955-0185
PO BOX 186, SALLISAW, OK 74955-0186
PO BOX 187, SALLISAW, OK 74955-0187
PO BOX 188, SALLISAW, OK 74955-0188
PO BOX 189, SALLISAW, OK 74955-0189
PO BOX 190, SALLISAW, OK 74955-0190
PO BOX 191, SALLISAW, OK 74955-0191
PO BOX 192, SALLISAW, OK 74955-0192
PO BOX 193, SALLISAW, OK 74955-0193
PO BOX 194, SALLISAW, OK 74955-0194
PO BOX 195, SALLISAW, OK 74955-0195
PO BOX 196, SALLISAW, OK 74955-0196
PO BOX 197, SALLISAW, OK 74955-0197
PO BOX 198, SALLISAW, OK 74955-0198
PO BOX 199, SALLISAW, OK 74955-0199
PO BOX 200, SALLISAW, OK 74955-0200
PO BOX 201, SALLISAW, OK 74955-0201
PO BOX 202, SALLISAW, OK 74955-0202
PO BOX 203, SALLISAW, OK 74955-0203
PO BOX 204, SALLISAW, OK 74955-0204
PO BOX 205, SALLISAW, OK 74955-0205
PO BOX 206, SALLISAW, OK 74955-0206
PO BOX 207, SALLISAW, OK 74955-0207
PO BOX 208, SALLISAW, OK 74955-0208
PO BOX 209, SALLISAW, OK 74955-0209
PO BOX 210, SALLISAW, OK 74955-0210
PO BOX 211, SALLISAW, OK 74955-0211
PO BOX 212, SALLISAW, OK 74955-0212
PO BOX 213, SALLISAW, OK 74955-0213
PO BOX 214, SALLISAW, OK 74955-0214
PO BOX 215, SALLISAW, OK 74955-0215
PO BOX 216, SALLISAW, OK 74955-0216
PO BOX 217, SALLISAW, OK 74955-0217
PO BOX 218, SALLISAW, OK 74955-0218
PO BOX 219, SALLISAW, OK 74955-0219
PO BOX 220, SALLISAW, OK 74955-0220
PO BOX 221, SALLISAW, OK 74955-0221
PO BOX 222, SALLISAW, OK 74955-0222
PO BOX 223, SALLISAW, OK 74955-0223
PO BOX 224, SALLISAW, OK 74955-0224
PO BOX 225, SALLISAW, OK 74955-0225
PO BOX 226, SALLISAW, OK 74955-0226
PO BOX 227, SALLISAW, OK 74955-0227
PO BOX 228, SALLISAW, OK 74955-0228
PO BOX 229, SALLISAW, OK 74955-0229
PO BOX 230, SALLISAW, OK 74955-0230
PO BOX 231, SALLISAW, OK 74955-0231