Pincode 600056 have been assigned to 5 locations.

Iyyappanthangal , Avadi Camp , Sriperumbudur
Kattupakkam , Poonamallee , Poonamallee
Poonamallee East , Avadi Camp , Poonamallee
Poonamallee , Avadi Camp , Poonamalee
Senneerkuppam , Poonamallee East , Poonamallee