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 6001, COLORADO SPRINGS, CO 80934-6001
PO BOX 6002, COLORADO SPRINGS, CO 80934-6002
PO BOX 6003, COLORADO SPRINGS, CO 80934-6003
PO BOX 6004, COLORADO SPRINGS, CO 80934-6004
PO BOX 6005, COLORADO SPRINGS, CO 80934-6005
PO BOX 6006, COLORADO SPRINGS, CO 80934-6006
PO BOX 6007, COLORADO SPRINGS, CO 80934-6007
PO BOX 6008, COLORADO SPRINGS, CO 80934-6008
PO BOX 6009, COLORADO SPRINGS, CO 80934-6009
PO BOX 6010, COLORADO SPRINGS, CO 80934-6010
PO BOX 6011, COLORADO SPRINGS, CO 80934-6011
PO BOX 6012, COLORADO SPRINGS, CO 80934-6012
PO BOX 6013, COLORADO SPRINGS, CO 80934-6013
PO BOX 6014, COLORADO SPRINGS, CO 80934-6014
PO BOX 6015, COLORADO SPRINGS, CO 80934-6015
PO BOX 6016, COLORADO SPRINGS, CO 80934-6016
PO BOX 6017, COLORADO SPRINGS, CO 80934-6017
PO BOX 6018, COLORADO SPRINGS, CO 80934-6018
PO BOX 6019, COLORADO SPRINGS, CO 80934-6019
PO BOX 6020, COLORADO SPRINGS, CO 80934-6020
PO BOX 6021, COLORADO SPRINGS, CO 80934-6021
PO BOX 6022, COLORADO SPRINGS, CO 80934-6022
PO BOX 6023, COLORADO SPRINGS, CO 80934-6023
PO BOX 6024, COLORADO SPRINGS, CO 80934-6024
PO BOX 6025, COLORADO SPRINGS, CO 80934-6025
PO BOX 6026, COLORADO SPRINGS, CO 80934-6026
PO BOX 6027, COLORADO SPRINGS, CO 80934-6027
PO BOX 6028, COLORADO SPRINGS, CO 80934-6028
PO BOX 6029, COLORADO SPRINGS, CO 80934-6029
PO BOX 6030, COLORADO SPRINGS, CO 80934-6030
PO BOX 6031, COLORADO SPRINGS, CO 80934-6031
PO BOX 6032, COLORADO SPRINGS, CO 80934-6032
PO BOX 6033, COLORADO SPRINGS, CO 80934-6033
PO BOX 6034, COLORADO SPRINGS, CO 80934-6034
PO BOX 6035, COLORADO SPRINGS, CO 80934-6035
PO BOX 6036, COLORADO SPRINGS, CO 80934-6036
PO BOX 6037, COLORADO SPRINGS, CO 80934-6037
PO BOX 6038, COLORADO SPRINGS, CO 80934-6038
PO BOX 6039, COLORADO SPRINGS, CO 80934-6039
PO BOX 6040, COLORADO SPRINGS, CO 80934-6040
PO BOX 6041, COLORADO SPRINGS, CO 80934-6041
PO BOX 6042, COLORADO SPRINGS, CO 80934-6042
PO BOX 6043, COLORADO SPRINGS, CO 80934-6043
PO BOX 6044, COLORADO SPRINGS, CO 80934-6044
PO BOX 6045, COLORADO SPRINGS, CO 80934-6045
PO BOX 6046, COLORADO SPRINGS, CO 80934-6046
PO BOX 6047, COLORADO SPRINGS, CO 80934-6047
PO BOX 6048, COLORADO SPRINGS, CO 80934-6048
PO BOX 6049, COLORADO SPRINGS, CO 80934-6049
PO BOX 6050, COLORADO SPRINGS, CO 80934-6050
PO BOX 6051, COLORADO SPRINGS, CO 80934-6051
PO BOX 6052, COLORADO SPRINGS, CO 80934-6052
PO BOX 6053, COLORADO SPRINGS, CO 80934-6053
PO BOX 6054, COLORADO SPRINGS, CO 80934-6054
PO BOX 6055, COLORADO SPRINGS, CO 80934-6055
PO BOX 6056, COLORADO SPRINGS, CO 80934-6056
PO BOX 6057, COLORADO SPRINGS, CO 80934-6057
PO BOX 6058, COLORADO SPRINGS, CO 80934-6058
PO BOX 6059, COLORADO SPRINGS, CO 80934-6059
PO BOX 6060, COLORADO SPRINGS, CO 80934-6060
PO BOX 6061, COLORADO SPRINGS, CO 80934-6061
PO BOX 6062, COLORADO SPRINGS, CO 80934-6062
PO BOX 6063, COLORADO SPRINGS, CO 80934-6063
PO BOX 6064, COLORADO SPRINGS, CO 80934-6064
PO BOX 6065, COLORADO SPRINGS, CO 80934-6065
PO BOX 6066, COLORADO SPRINGS, CO 80934-6066
PO BOX 6067, COLORADO SPRINGS, CO 80934-6067
PO BOX 6068, COLORADO SPRINGS, CO 80934-6068
PO BOX 6069, COLORADO SPRINGS, CO 80934-6069
PO BOX 6070, COLORADO SPRINGS, CO 80934-6070
PO BOX 6071, COLORADO SPRINGS, CO 80934-6071
PO BOX 6072, COLORADO SPRINGS, CO 80934-6072
PO BOX 6073, COLORADO SPRINGS, CO 80934-6073
PO BOX 6074, COLORADO SPRINGS, CO 80934-6074
PO BOX 6075, COLORADO SPRINGS, CO 80934-6075
PO BOX 6076, COLORADO SPRINGS, CO 80934-6076
PO BOX 6077, COLORADO SPRINGS, CO 80934-6077
PO BOX 6078, COLORADO SPRINGS, CO 80934-6078
PO BOX 6079, COLORADO SPRINGS, CO 80934-6079
PO BOX 6080, COLORADO SPRINGS, CO 80934-6080
PO BOX 6081, COLORADO SPRINGS, CO 80934-6081
PO BOX 6082, COLORADO SPRINGS, CO 80934-6082
PO BOX 6083, COLORADO SPRINGS, CO 80934-6083
PO BOX 6084, COLORADO SPRINGS, CO 80934-6084
PO BOX 6085, COLORADO SPRINGS, CO 80934-6085
PO BOX 6086, COLORADO SPRINGS, CO 80934-6086
PO BOX 6087, COLORADO SPRINGS, CO 80934-6087
PO BOX 6088, COLORADO SPRINGS, CO 80934-6088
PO BOX 6089, COLORADO SPRINGS, CO 80934-6089
PO BOX 6090, COLORADO SPRINGS, CO 80934-6090
PO BOX 6091, COLORADO SPRINGS, CO 80934-6091
PO BOX 6092, COLORADO SPRINGS, CO 80934-6092
PO BOX 6093, COLORADO SPRINGS, CO 80934-6093
PO BOX 6094, COLORADO SPRINGS, CO 80934-6094
PO BOX 6095, COLORADO SPRINGS, CO 80934-6095
PO BOX 6096, COLORADO SPRINGS, CO 80934-6096
PO BOX 6097, COLORADO SPRINGS, CO 80934-6097
PO BOX 6098, COLORADO SPRINGS, CO 80934-6098
PO BOX 6099, COLORADO SPRINGS, CO 80934-6099
PO BOX 6100, COLORADO SPRINGS, CO 80934-6100
PO BOX 6101, COLORADO SPRINGS, CO 80934-6101
PO BOX 6102, COLORADO SPRINGS, CO 80934-6102
PO BOX 6103, COLORADO SPRINGS, CO 80934-6103
PO BOX 6104, COLORADO SPRINGS, CO 80934-6104
PO BOX 6105, COLORADO SPRINGS, CO 80934-6105
PO BOX 6106, COLORADO SPRINGS, CO 80934-6106
PO BOX 6107, COLORADO SPRINGS, CO 80934-6107
PO BOX 6108, COLORADO SPRINGS, CO 80934-6108
PO BOX 6109, COLORADO SPRINGS, CO 80934-6109
PO BOX 6110, COLORADO SPRINGS, CO 80934-6110
PO BOX 6111, COLORADO SPRINGS, CO 80934-6111
PO BOX 6112, COLORADO SPRINGS, CO 80934-6112
PO BOX 6113, COLORADO SPRINGS, CO 80934-6113
PO BOX 6114, COLORADO SPRINGS, CO 80934-6114
PO BOX 6115, COLORADO SPRINGS, CO 80934-6115
PO BOX 6116, COLORADO SPRINGS, CO 80934-6116
PO BOX 6117, COLORADO SPRINGS, CO 80934-6117
PO BOX 6118, COLORADO SPRINGS, CO 80934-6118
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