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, SANTA ROSA, TX 78593-0031
PO BOX 32, SANTA ROSA, TX 78593-0032
PO BOX 33, SANTA ROSA, TX 78593-0033
PO BOX 34, SANTA ROSA, TX 78593-0034
PO BOX 35, SANTA ROSA, TX 78593-0035
PO BOX 36, SANTA ROSA, TX 78593-0036
PO BOX 37, SANTA ROSA, TX 78593-0037
PO BOX 38, SANTA ROSA, TX 78593-0038
PO BOX 39, SANTA ROSA, TX 78593-0039
PO BOX 40, SANTA ROSA, TX 78593-0040
PO BOX 41, SANTA ROSA, TX 78593-0041
PO BOX 42, SANTA ROSA, TX 78593-0042
PO BOX 43, SANTA ROSA, TX 78593-0043
PO BOX 44, SANTA ROSA, TX 78593-0044
PO BOX 45, SANTA ROSA, TX 78593-0045
PO BOX 46, SANTA ROSA, TX 78593-0046
PO BOX 47, SANTA ROSA, TX 78593-0047
PO BOX 48, SANTA ROSA, TX 78593-0048
PO BOX 49, SANTA ROSA, TX 78593-0049
PO BOX 50, SANTA ROSA, TX 78593-0050
PO BOX 51, SANTA ROSA, TX 78593-0051
PO BOX 52, SANTA ROSA, TX 78593-0052
PO BOX 53, SANTA ROSA, TX 78593-0053
PO BOX 54, SANTA ROSA, TX 78593-0054
PO BOX 55, SANTA ROSA, TX 78593-0055
PO BOX 56, SANTA ROSA, TX 78593-0056
PO BOX 57, SANTA ROSA, TX 78593-0057
PO BOX 58, SANTA ROSA, TX 78593-0058
PO BOX 59, SANTA ROSA, TX 78593-0059
PO BOX 60, SANTA ROSA, TX 78593-0060
PO BOX 61, SANTA ROSA, TX 78593-0061
PO BOX 62, SANTA ROSA, TX 78593-0062
PO BOX 63, SANTA ROSA, TX 78593-0063
PO BOX 64, SANTA ROSA, TX 78593-0064
PO BOX 65, SANTA ROSA, TX 78593-0065
PO BOX 66, SANTA ROSA, TX 78593-0066
PO BOX 67, SANTA ROSA, TX 78593-0067
PO BOX 68, SANTA ROSA, TX 78593-0068
PO BOX 69, SANTA ROSA, TX 78593-0069
PO BOX 70, SANTA ROSA, TX 78593-0070
PO BOX 71, SANTA ROSA, TX 78593-0071
PO BOX 72, SANTA ROSA, TX 78593-0072
PO BOX 73, SANTA ROSA, TX 78593-0073
PO BOX 74, SANTA ROSA, TX 78593-0074
PO BOX 75, SANTA ROSA, TX 78593-0075
PO BOX 76, SANTA ROSA, TX 78593-0076
PO BOX 77, SANTA ROSA, TX 78593-0077
PO BOX 78, SANTA ROSA, TX 78593-0078
PO BOX 79, SANTA ROSA, TX 78593-0079
PO BOX 80, SANTA ROSA, TX 78593-0080
PO BOX 81, SANTA ROSA, TX 78593-0081
PO BOX 82, SANTA ROSA, TX 78593-0082
PO BOX 83, SANTA ROSA, TX 78593-0083
PO BOX 84, SANTA ROSA, TX 78593-0084
PO BOX 85, SANTA ROSA, TX 78593-0085
PO BOX 86, SANTA ROSA, TX 78593-0086
PO BOX 87, SANTA ROSA, TX 78593-0087
PO BOX 88, SANTA ROSA, TX 78593-0088
PO BOX 89, SANTA ROSA, TX 78593-0089
PO BOX 90, SANTA ROSA, TX 78593-0090
PO BOX 91, SANTA ROSA, TX 78593-0091
PO BOX 92, SANTA ROSA, TX 78593-0092
PO BOX 93, SANTA ROSA, TX 78593-0093
PO BOX 94, SANTA ROSA, TX 78593-0094
PO BOX 95, SANTA ROSA, TX 78593-0095
PO BOX 96, SANTA ROSA, TX 78593-0096
PO BOX 97, SANTA ROSA, TX 78593-0097
PO BOX 98, SANTA ROSA, TX 78593-0098
PO BOX 99, SANTA ROSA, TX 78593-0099
PO BOX 100, SANTA ROSA, TX 78593-0100
PO BOX 101, SANTA ROSA, TX 78593-0101
PO BOX 102, SANTA ROSA, TX 78593-0102
PO BOX 103, SANTA ROSA, TX 78593-0103
PO BOX 104, SANTA ROSA, TX 78593-0104
PO BOX 105, SANTA ROSA, TX 78593-0105
PO BOX 106, SANTA ROSA, TX 78593-0106
PO BOX 107, SANTA ROSA, TX 78593-0107
PO BOX 108, SANTA ROSA, TX 78593-0108
PO BOX 109, SANTA ROSA, TX 78593-0109
PO BOX 110, SANTA ROSA, TX 78593-0110
PO BOX 111, SANTA ROSA, TX 78593-0111
PO BOX 112, SANTA ROSA, TX 78593-0112
PO BOX 113, SANTA ROSA, TX 78593-0113
PO BOX 114, SANTA ROSA, TX 78593-0114
PO BOX 115, SANTA ROSA, TX 78593-0115
PO BOX 116, SANTA ROSA, TX 78593-0116
PO BOX 117, SANTA ROSA, TX 78593-0117
PO BOX 118, SANTA ROSA, TX 78593-0118
PO BOX 119, SANTA ROSA, TX 78593-0119
PO BOX 120, SANTA ROSA, TX 78593-0120
PO BOX 121, SANTA ROSA, TX 78593-0121
PO BOX 122, SANTA ROSA, TX 78593-0122
PO BOX 123, SANTA ROSA, TX 78593-0123
PO BOX 124, SANTA ROSA, TX 78593-0124
PO BOX 125, SANTA ROSA, TX 78593-0125
PO BOX 126, SANTA ROSA, TX 78593-0126
PO BOX 127, SANTA ROSA, TX 78593-0127
PO BOX 128, SANTA ROSA, TX 78593-0128
PO BOX 129, SANTA ROSA, TX 78593-0129
PO BOX 130, SANTA ROSA, TX 78593-0130
PO BOX 131, SANTA ROSA, TX 78593-0131
PO BOX 132, SANTA ROSA, TX 78593-0132
PO BOX 133, SANTA ROSA, TX 78593-0133
PO BOX 134, SANTA ROSA, TX 78593-0134
PO BOX 135, SANTA ROSA, TX 78593-0135
PO BOX 136, SANTA ROSA, TX 78593-0136
PO BOX 137, SANTA ROSA, TX 78593-0137
PO BOX 138, SANTA ROSA, TX 78593-0138
PO BOX 139, SANTA ROSA, TX 78593-0139
PO BOX 140, SANTA ROSA, TX 78593-0140
PO BOX 141, SANTA ROSA, TX 78593-0141
PO BOX 142, SANTA ROSA, TX 78593-0142
PO BOX 143, SANTA ROSA, TX 78593-0143
PO BOX 144, SANTA ROSA, TX 78593-0144
PO BOX 145, SANTA ROSA, TX 78593-0145
PO BOX 146, SANTA ROSA, TX 78593-0146
PO BOX 147, SANTA ROSA, TX 78593-0147
PO BOX 148, SANTA ROSA, TX 78593-0148
PO BOX 149, SANTA ROSA, TX 78593-0149
PO BOX 150, SANTA ROSA, TX 78593-0150
PO BOX 151, SANTA ROSA, TX 78593-0151
PO BOX 152, SANTA ROSA, TX 78593-0152
PO BOX 153, SANTA ROSA, TX 78593-0153
PO BOX 154, SANTA ROSA, TX 78593-0154
PO BOX 155, SANTA ROSA, TX 78593-0155
PO BOX 156, SANTA ROSA, TX 78593-0156
PO BOX 157, SANTA ROSA, TX 78593-0157
PO BOX 158, SANTA ROSA, TX 78593-0158
PO BOX 159, SANTA ROSA, TX 78593-0159
PO BOX 160, SANTA ROSA, TX 78593-0160
PO BOX 161, SANTA ROSA, TX 78593-0161
PO BOX 162, SANTA ROSA, TX 78593-0162
PO BOX 163, SANTA ROSA, TX 78593-0163
PO BOX 164, SANTA ROSA, TX 78593-0164
PO BOX 165, SANTA ROSA, TX 78593-0165
PO BOX 166, SANTA ROSA, TX 78593-0166
PO BOX 167, SANTA ROSA, TX 78593-0167
PO BOX 168, SANTA ROSA, TX 78593-0168
PO BOX 169, SANTA ROSA, TX 78593-0169
PO BOX 170, SANTA ROSA, TX 78593-0170
PO BOX 171, SANTA ROSA, TX 78593-0171
PO BOX 172, SANTA ROSA, TX 78593-0172
PO BOX 173, SANTA ROSA, TX 78593-0173
PO BOX 174, SANTA ROSA, TX 78593-0174
PO BOX 175, SANTA ROSA, TX 78593-0175
PO BOX 176, SANTA ROSA, TX 78593-0176
PO BOX 177, SANTA ROSA, TX 78593-0177
PO BOX 178, SANTA ROSA, TX 78593-0178
PO BOX 179, SANTA ROSA, TX 78593-0179
PO BOX 180, SANTA ROSA, TX 78593-0180
PO BOX 181, SANTA ROSA, TX 78593-0181
PO BOX 182, SANTA ROSA, TX 78593-0182
PO BOX 183, SANTA ROSA, TX 78593-0183
PO BOX 184, SANTA ROSA, TX 78593-0184
PO BOX 185, SANTA ROSA, TX 78593-0185
PO BOX 186, SANTA ROSA, TX 78593-0186
PO BOX 187, SANTA ROSA, TX 78593-0187
PO BOX 188, SANTA ROSA, TX 78593-0188
PO BOX 189, SANTA ROSA, TX 78593-0189
PO BOX 190, SANTA ROSA, TX 78593-0190
PO BOX 191, SANTA ROSA, TX 78593-0191
PO BOX 192, SANTA ROSA, TX 78593-0192
PO BOX 193, SANTA ROSA, TX 78593-0193
PO BOX 194, SANTA ROSA, TX 78593-0194
PO BOX 195, SANTA ROSA, TX 78593-0195
PO BOX 196, SANTA ROSA, TX 78593-0196
PO BOX 197, SANTA ROSA, TX 78593-0197
PO BOX 198, SANTA ROSA, TX 78593-0198
PO BOX 199, SANTA ROSA, TX 78593-0199
PO BOX 200, SANTA ROSA, TX 78593-0200
PO BOX 201, SANTA ROSA, TX 78593-0201
PO BOX 202, SANTA ROSA, TX 78593-0202
PO BOX 203, SANTA ROSA, TX 78593-0203
PO BOX 204, SANTA ROSA, TX 78593-0204
PO BOX 205, SANTA ROSA, TX 78593-0205
PO BOX 206, SANTA ROSA, TX 78593-0206
PO BOX 207, SANTA ROSA, TX 78593-0207
PO BOX 208, SANTA ROSA, TX 78593-0208
PO BOX 209, SANTA ROSA, TX 78593-0209
PO BOX 210, SANTA ROSA, TX 78593-0210
PO BOX 211, SANTA ROSA, TX 78593-0211
PO BOX 212, SANTA ROSA, TX 78593-0212
PO BOX 213, SANTA ROSA, TX 78593-0213
PO BOX 214, SANTA ROSA, TX 78593-0214
PO BOX 215, SANTA ROSA, TX 78593-0215
PO BOX 216, SANTA ROSA, TX 78593-0216
PO BOX 217, SANTA ROSA, TX 78593-0217
PO BOX 218, SANTA ROSA, TX 78593-0218
PO BOX 219, SANTA ROSA, TX 78593-0219
PO BOX 220, SANTA ROSA, TX 78593-0220
PO BOX 221, SANTA ROSA, TX 78593-0221
PO BOX 222, SANTA ROSA, TX 78593-0222
PO BOX 223, SANTA ROSA, TX 78593-0223
PO BOX 224, SANTA ROSA, TX 78593-0224
PO BOX 225, SANTA ROSA, TX 78593-0225
PO BOX 226, SANTA ROSA, TX 78593-0226
PO BOX 227, SANTA ROSA, TX 78593-0227
PO BOX 228, SANTA ROSA, TX 78593-0228
PO BOX 229, SANTA ROSA, TX 78593-0229
PO BOX 230, SANTA ROSA, TX 78593-0230
PO BOX 231, SANTA ROSA, TX 78593-0231
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