There are 4 post offices under PIN code 121006.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Faridabad Sector 7 S.O | Sub Office | Delivery | Ballabgarh | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 2 | Faridabad Sector 8 S.O | Sub Office | Non-Delivery | Ballabgarh | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 3 | Faridabad Sector 9 S.O | Sub Office | Non-Delivery | Ballabgarh | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 4 | G.T. Road Faridabad S.O | Sub Office | Non-Delivery | Ballabgarh | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |