There are 18 post offices under PIN code 123021.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Bachhod B.O | Branch Office | Delivery | Mandi Ateli | Rewari | Gurgaon | Ambala Hq | Haryana | Haryana |
| 2 | Bagahod B.O | Branch Office | Delivery | Narnaul | Mahendragarh | Gurgaon | Ambala Hq | Haryana | Haryana |
| 3 | Behali B.O | Branch Office | Non-Delivery | Behali | Mahendragarh | Gurgaon | Ambala Hq | Haryana | Haryana |
| 4 | Bewal B.O | Branch Office | Delivery | Bewal | Mahendragarh | Gurgaon | Ambala Hq | Haryana | Haryana |
| 5 | Bhocharia B.O | Branch Office | Delivery | Narnaul | Mahendragarh | Gurgaon | Ambala Hq | Haryana | Haryana |
| 6 | Bocharia B.O | Branch Office | Delivery | Mandi Ateli | Rewari | Gurgaon | Ambala Hq | Haryana | Haryana |
| 7 | Dongra Ahir B.O | Branch Office | Delivery | Dongra Ahir | Mahendragarh | Gurgaon | Ambala Hq | Haryana | Haryana |
| 8 | Dulat Jat B.O | Branch Office | Delivery | Dulat Jat | Mahendragarh | Gurgaon | Ambala Hq | Haryana | Haryana |
| 9 | Ganiar B.O | Branch Office | Delivery | Ganiar | Mahendragarh | Gurgaon | Ambala Hq | Haryana | Haryana |
| 10 | Garhi B.O | Branch Office | Delivery | Garhi | Mahendragarh | Gurgaon | Ambala Hq | Haryana | Haryana |
| 11 | Gokalpur B.O | Branch Office | Delivery | Gokalpur | Mahendragarh | Gurgaon | Ambala Hq | Haryana | Haryana |
| 12 | Gujarwas B.O | Branch Office | Delivery | Gujarwas | Mahendragarh | Gurgaon | Ambala Hq | Haryana | Haryana |
| 13 | Kanti B.O | Branch Office | Delivery | Kanti | Mahendragarh | Gurgaon | Ambala Hq | Haryana | Haryana |
| 14 | Kanti Kheri B.O | Branch Office | Non-Delivery | Kanti Kheri | Mahendragarh | Gurgaon | Ambala Hq | Haryana | Haryana |
| 15 | Mandi Ateli S.O | Sub Office | Delivery | Mandi Ateli | Rewari | Gurgaon | Ambala Hq | Haryana | Haryana |
| 16 | Rattan Kalan B.O | Branch Office | Delivery | Rattan Kalan | Mahendragarh | Gurgaon | Ambala Hq | Haryana | Haryana |
| 17 | Sarai Bahadur B.O | Branch Office | Delivery | Narnaul | Mahendragarh | Gurgaon | Ambala Hq | Haryana | Haryana |
| 18 | Tajpur B.O | Branch Office | Delivery | Tajpur | Mahendragarh | Gurgaon | Ambala Hq | Haryana | Haryana |