Sidney City Area Code List
| Area Codes | Country | State | City | Time Zone | Operating |
|---|---|---|---|---|---|
| 204 | Canada | Manitoba | Sidney | Central | Details |
| 217 | US | Illinois - IL | Sidney | Central | Details |
| 254 | US | Texas - TX | Sidney | Central | Details |
| 308 | US | Nebraska - NE | Sidney | Central / Mountain | Details |
| 406 | US | Montana - MT | Sidney | Mountain | Details |
| 607 | US | New York - NY | Sidney | Eastern | Details |
| 712 | US | Iowa - IA | Sidney | Central | Details |
| 937 | US | Ohio - OH | Sidney | Eastern | Details |
| 970 | US | Colorado - CO | Sidney | Mountain | Details |
| 989 | US | Michigan – MI | Sidney | Eastern | Details |