New Haven City Area Code List
| Area Codes | Country | State | City | Time Zone | Operating |
|---|---|---|---|---|---|
| 203 | US | Connecticut - CT | New Haven | Eastern | Details |
| 260 | US | Indiana - IN | New Haven | Eastern | Details |
| 475 | US | Connecticut - CT | New Haven | Eastern | Details |
| 502 | US | Kentucky - KY | New Haven | Eastern | Details |
| 586 | US | Michigan - MI | New Haven | Eastern | Details |
| 618 | US | Illinois - IL | New Haven | Central | Details |
| 636 | US | Missouri - MO | New Haven | Central | Details |
| 802 | US | Vermont - VT | New Haven | Eastern | Details |
| 902 | Canada | Nova Scotia | New Haven | Eastern | Details |