Motorway 642 (Greece)
The Greek Motorway A621 is a short motorway in the Athens metropolitan area, Greece. It forms a connection between the northern beltway Motorway 6 and the eastern beltway Motorway 62. Its length is 2 km.
Exit list
| Regional unit | Exit | Name | Destinations | Notes/Also as |
| East Attica | Y4 | Agia Paraskevi Interchange | A62 | |
| East Attica | 13 | D. Plakentias Avenue interchange | A6 E94 |
Source: Attiki Odos, Motorway Exitlists