Avon City Area Code List
| Area Codes | Country | State | City | Time Zone | Operating |
|---|---|---|---|---|---|
| 309 | US | Illinois - IL | Avon | Central | Details |
| 320 | US | Minnesota - MN | Avon | Central | Details |
| 406 | US | Montana - MT | Avon | Mountain | Details |
| 440 | US | Ohio - OH | Avon | Eastern | Details |
| 585 | US | New York - NY | Avon | Eastern | Details |
| 605 | US | South Dakota - SD | Avon | Central / Mountain | Details |
| 978 | US | Massachusetts - MA | Avon | Eastern | Details |