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 6121, COLORADO SPRINGS, CO 80934-6121
PO BOX 6122, COLORADO SPRINGS, CO 80934-6122
PO BOX 6123, COLORADO SPRINGS, CO 80934-6123
PO BOX 6124, COLORADO SPRINGS, CO 80934-6124
PO BOX 6125, COLORADO SPRINGS, CO 80934-6125
PO BOX 6126, COLORADO SPRINGS, CO 80934-6126
PO BOX 6127, COLORADO SPRINGS, CO 80934-6127
PO BOX 6128, COLORADO SPRINGS, CO 80934-6128
PO BOX 6129, COLORADO SPRINGS, CO 80934-6129
PO BOX 6130, COLORADO SPRINGS, CO 80934-6130
PO BOX 6131, COLORADO SPRINGS, CO 80934-6131
PO BOX 6132, COLORADO SPRINGS, CO 80934-6132
PO BOX 6133, COLORADO SPRINGS, CO 80934-6133
PO BOX 6134, COLORADO SPRINGS, CO 80934-6134
PO BOX 6135, COLORADO SPRINGS, CO 80934-6135
PO BOX 6136, COLORADO SPRINGS, CO 80934-6136
PO BOX 6137, COLORADO SPRINGS, CO 80934-6137
PO BOX 6138, COLORADO SPRINGS, CO 80934-6138
PO BOX 6139, COLORADO SPRINGS, CO 80934-6139
PO BOX 6140, COLORADO SPRINGS, CO 80934-6140
PO BOX 6141, COLORADO SPRINGS, CO 80934-6141
PO BOX 6142, COLORADO SPRINGS, CO 80934-6142
PO BOX 6143, COLORADO SPRINGS, CO 80934-6143
PO BOX 6144, COLORADO SPRINGS, CO 80934-6144
PO BOX 6145, COLORADO SPRINGS, CO 80934-6145
PO BOX 6146, COLORADO SPRINGS, CO 80934-6146
PO BOX 6147, COLORADO SPRINGS, CO 80934-6147
PO BOX 6148, COLORADO SPRINGS, CO 80934-6148
PO BOX 6149, COLORADO SPRINGS, CO 80934-6149
PO BOX 6150, COLORADO SPRINGS, CO 80934-6150
PO BOX 6151, COLORADO SPRINGS, CO 80934-6151
PO BOX 6152, COLORADO SPRINGS, CO 80934-6152
PO BOX 6153, COLORADO SPRINGS, CO 80934-6153
PO BOX 6154, COLORADO SPRINGS, CO 80934-6154
PO BOX 6155, COLORADO SPRINGS, CO 80934-6155
PO BOX 6156, COLORADO SPRINGS, CO 80934-6156
PO BOX 6157, COLORADO SPRINGS, CO 80934-6157
PO BOX 6158, COLORADO SPRINGS, CO 80934-6158
PO BOX 6159, COLORADO SPRINGS, CO 80934-6159
PO BOX 6160, COLORADO SPRINGS, CO 80934-6160
PO BOX 6161, COLORADO SPRINGS, CO 80934-6161
PO BOX 6162, COLORADO SPRINGS, CO 80934-6162
PO BOX 6163, COLORADO SPRINGS, CO 80934-6163
PO BOX 6164, COLORADO SPRINGS, CO 80934-6164
PO BOX 6165, COLORADO SPRINGS, CO 80934-6165
PO BOX 6166, COLORADO SPRINGS, CO 80934-6166
PO BOX 6167, COLORADO SPRINGS, CO 80934-6167
PO BOX 6168, COLORADO SPRINGS, CO 80934-6168
PO BOX 6169, COLORADO SPRINGS, CO 80934-6169
PO BOX 6170, COLORADO SPRINGS, CO 80934-6170
PO BOX 6171, COLORADO SPRINGS, CO 80934-6171
PO BOX 6172, COLORADO SPRINGS, CO 80934-6172
PO BOX 6173, COLORADO SPRINGS, CO 80934-6173
PO BOX 6174, COLORADO SPRINGS, CO 80934-6174
PO BOX 6175, COLORADO SPRINGS, CO 80934-6175
PO BOX 6176, COLORADO SPRINGS, CO 80934-6176
PO BOX 6177, COLORADO SPRINGS, CO 80934-6177
PO BOX 6178, COLORADO SPRINGS, CO 80934-6178
PO BOX 6179, COLORADO SPRINGS, CO 80934-6179
PO BOX 6180, COLORADO SPRINGS, CO 80934-6180
PO BOX 6181, COLORADO SPRINGS, CO 80934-6181
PO BOX 6182, COLORADO SPRINGS, CO 80934-6182
PO BOX 6183, COLORADO SPRINGS, CO 80934-6183
PO BOX 6184, COLORADO SPRINGS, CO 80934-6184
PO BOX 6185, COLORADO SPRINGS, CO 80934-6185
PO BOX 6186, COLORADO SPRINGS, CO 80934-6186
PO BOX 6187, COLORADO SPRINGS, CO 80934-6187
PO BOX 6188, COLORADO SPRINGS, CO 80934-6188
PO BOX 6189, COLORADO SPRINGS, CO 80934-6189
PO BOX 6190, COLORADO SPRINGS, CO 80934-6190
PO BOX 6191, COLORADO SPRINGS, CO 80934-6191
PO BOX 6192, COLORADO SPRINGS, CO 80934-6192
PO BOX 6193, COLORADO SPRINGS, CO 80934-6193
PO BOX 6194, COLORADO SPRINGS, CO 80934-6194
PO BOX 6195, COLORADO SPRINGS, CO 80934-6195
PO BOX 6196, COLORADO SPRINGS, CO 80934-6196
PO BOX 6197, COLORADO SPRINGS, CO 80934-6197
PO BOX 6198, COLORADO SPRINGS, CO 80934-6198
PO BOX 6199, COLORADO SPRINGS, CO 80934-6199
PO BOX 6200, COLORADO SPRINGS, CO 80934-6200
PO BOX 6201, COLORADO SPRINGS, CO 80934-6201
PO BOX 6202, COLORADO SPRINGS, CO 80934-6202
PO BOX 6203, COLORADO SPRINGS, CO 80934-6203
PO BOX 6204, COLORADO SPRINGS, CO 80934-6204
PO BOX 6205, COLORADO SPRINGS, CO 80934-6205
PO BOX 6206, COLORADO SPRINGS, CO 80934-6206
PO BOX 6207, COLORADO SPRINGS, CO 80934-6207
PO BOX 6208, COLORADO SPRINGS, CO 80934-6208
PO BOX 6209, COLORADO SPRINGS, CO 80934-6209
PO BOX 6210, COLORADO SPRINGS, CO 80934-6210
PO BOX 6211, COLORADO SPRINGS, CO 80934-6211
PO BOX 6212, COLORADO SPRINGS, CO 80934-6212
PO BOX 6213, COLORADO SPRINGS, CO 80934-6213
PO BOX 6214, COLORADO SPRINGS, CO 80934-6214
PO BOX 6215, COLORADO SPRINGS, CO 80934-6215
PO BOX 6216, COLORADO SPRINGS, CO 80934-6216
PO BOX 6217, COLORADO SPRINGS, CO 80934-6217
PO BOX 6218, COLORADO SPRINGS, CO 80934-6218
PO BOX 6219, COLORADO SPRINGS, CO 80934-6219
PO BOX 6220, COLORADO SPRINGS, CO 80934-6220
PO BOX 6221, COLORADO SPRINGS, CO 80934-6221
PO BOX 6222, COLORADO SPRINGS, CO 80934-6222
PO BOX 6223, COLORADO SPRINGS, CO 80934-6223
PO BOX 6224, COLORADO SPRINGS, CO 80934-6224
PO BOX 6225, COLORADO SPRINGS, CO 80934-6225
PO BOX 6226, COLORADO SPRINGS, CO 80934-6226
PO BOX 6227, COLORADO SPRINGS, CO 80934-6227
PO BOX 6228, COLORADO SPRINGS, CO 80934-6228
PO BOX 6229, COLORADO SPRINGS, CO 80934-6229
PO BOX 6230, COLORADO SPRINGS, CO 80934-6230
PO BOX 6231, COLORADO SPRINGS, CO 80934-6231
PO BOX 6232, COLORADO SPRINGS, CO 80934-6232
PO BOX 6233, COLORADO SPRINGS, CO 80934-6233
PO BOX 6234, COLORADO SPRINGS, CO 80934-6234
PO BOX 6235, COLORADO SPRINGS, CO 80934-6235
PO BOX 6236, COLORADO SPRINGS, CO 80934-6236
PO BOX 6237, COLORADO SPRINGS, CO 80934-6237
PO BOX 6238, COLORADO SPRINGS, CO 80934-6238
PO BOX 6239, COLORADO SPRINGS, CO 80934-6239
PO BOX 6240, COLORADO SPRINGS, CO 80934-6240
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