ZIP Code Area 831XX
- ZIP Code Area 83101
- ZIP Code Area 83110
- ZIP Code Area 83111
- ZIP Code Area 83112
- ZIP Code Area 83113
- ZIP Code Area 83114
- ZIP Code Area 83115
- ZIP Code Area 83116
- ZIP Code Area 83118
- ZIP Code Area 83119
- ZIP Code Area 83120
- ZIP Code Area 83121
- ZIP Code Area 83122
- ZIP Code Area 83123
- ZIP Code Area 83124
- ZIP Code Area 83126
- ZIP Code Area 83127
- ZIP Code Area 83128