Greenfield City Area Code List
| Area Codes | Country | State | City | Time Zone | Operating |
|---|---|---|---|---|---|
| 317 | US | Indiana - IN | Greenfield | Eastern | Details |
| 413 | US | Massachusetts - MA | Greenfield | Eastern | Details |
| 417 | US | Missouri - MO | Greenfield | Central | Details |
| 603 | US | New Hampshire - NH | Greenfield | Eastern | Details |
| 641 | US | Iowa - IA | Greenfield | Central | Details |
| 731 | US | Tennessee - TN | Greenfield | Central | Details |
| 831 | US | California - CA | Greenfield | Pacific | Details |
| 937 | US | Ohio - OH | Greenfield | Eastern | Details |