There are 5 post offices under PIN code 121003.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Amarnagar S.O (Faridabad) | Sub Office | Delivery | Faridabad | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 2 | Anangpur B.O | Branch Office | Delivery | Faridabad | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 3 | Gurukul Indraprashtha B.O | Branch Office | Delivery | Faridabad | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 4 | Mathura Road Faridabad S.O | Sub Office | Non-Delivery | Faridabad | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |
| 5 | Tilpat B.O | Branch Office | Delivery | Faridabad | Faridabad | Faridabad | Ambala Hq | Haryana | Haryana |