Mullikolathur BO is the primary post office registered under PIN code 603109 in Chengalpattu, Tamil Nadu. This code sits within the Southern Postal Region, with 11 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Mullikolathur BO | BO | Branch Post Office |
| Pandur BO | BO | Branch Post Office |
| Puliyur BO | BO | Branch Post Office |
| Veerapuram BO | BO | Branch Post Office |
| Ammanambakkam BO | BO | Branch Post Office |
| Tirukalikundram SO | SO | Sub Post Office |
| Edaiyur BO | BO | Branch Post Office |
| Oragadam BO | BO | Branch Post Office |
| Desumugipettai BO | BO | Branch Post Office |
| Irumbulicheri BO | BO | Branch Post Office |
| Thathalur BO | BO | Branch Post Office |
