Chennai Airport S.O is the primary post office registered under PIN code 600016 in Chennai, Tamil Nadu. This code sits within the Southern Postal Region, with 4 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Chennai Airport S.O | SO | Sub Post Office |
| Alandur(Reopened W.E.F.6.6.05) S.O | SO | Sub Post Office |
| St Thomas Mount HO | HO | Head Post Office |
| Meenambakkam S.O | SO | Sub Post Office |
