There are 12 post offices under PIN code 121103.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Chhainsa B.O | Branch Office | Delivery | Hathin | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 2 | Gehlab B.O | Branch Office | Delivery | Hathin | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 3 | Gharrot B.O | Branch Office | Delivery | Hathin | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 4 | Hathin S.O | Sub Office | Delivery | Hathin | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 5 | Hurithal B.O | Branch Office | Delivery | Hathin | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 6 | Kondal B.O | Branch Office | Delivery | Hathin | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 7 | Kot B.O | Branch Office | Delivery | Hathin | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 8 | Madnaka B.O | Branch Office | Delivery | Hathin | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 9 | Malai B.O | Branch Office | Delivery | Hathin | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 10 | Mandkola B.O | Branch Office | Delivery | Hathin | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 11 | Rupraka B.O | Branch Office | Delivery | Hathin | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 12 | Uttawar B.O | Branch Office | Delivery | Hathin | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |