Greenwich City Area Code List
| Area Codes | Country | State | City | Time Zone | Operating |
|---|---|---|---|---|---|
| 203 | US | Connecticut - CT | Greenwich | Eastern | Details |
| 419 | US | Ohio - OH | Greenwich | Eastern | Details |
| 435 | US | Utah - UT | Greenwich | Mountain | Details |
| 518 | US | New York - NY | Greenwich | Eastern | Details |
| 567 | US | Ohio - OH | Greenwich | Eastern | Details |