Middletown City Area Code List
| Area Codes | Country | State | City | Time Zone | Operating |
|---|---|---|---|---|---|
| 217 | US | Illinois - IL | Middletown | Central | Details |
| 240 | US | Maryland - MD | Middletown | Eastern | Details |
| 301 | US | Maryland - MD | Middletown | Eastern | Details |
| 302 | US | Delaware - DE | Middletown | Eastern | Details |
| 513 | US | Ohio - OH | Middletown | Eastern | Details |
| 573 | US | Missouri - MO | Middletown | Central | Details |
| 707 | US | California - CA | Middletown | Pacific | Details |
| 717 | US | Pennsylvania - PA | Middletown | Eastern | Details |
| 732 | US | New Jersey - NJ | Middletown | Eastern | Details |
| 765 | US | Indiana - IN | Middletown | Eastern | Details |
| 845 | US | New York - NY | Middletown | Eastern | Details |
| 848 | US | New Jersey - NJ | Middletown | Eastern | Details |
| 860 | US | Connecticut - CT | Middletown | Eastern | Details |
| 908 | US | New Jersey - NJ | Middletown | Eastern | Details |
| 914 | US | New York - NY | Middletown | Eastern | Details |