Here is a the list of STD (Subscriber Trunk Dialing) codes for cities and towns in Haryana, India:
| City/Town | STD Code |
|---|---|
| Adampur Mandi | 01669 |
| Ambala | 0171 |
| Assandh | 01749 |
| Bahadurgarh | 01276 |
| Barara | 01731 |
| Barwala | 01693 |
| Bawal | 01284 |
| Bawani Khera | 01254 |
| Bhiwani | 01664 |
| Charkhi Dadri | 01250 |
| Cheeka | 01743 |
| Chhachhrauli | 01735 |
| Dabwali | 01668 |
| Ellenabad | 01698 |
| Faridabad | 0129 |
| Fatehabad | 01667 |
| Ferozepur Jhirka | 01268 |
| Gharaunda | 01748 |
| Gohana | 01263 |
| Gurugram (Gurgaon) | 0124 |
| Hansi | 01663 |
| Hisar | 01662 |
| Jagadhri | 01732 |
| Jatusana | 01281 |
| Jhajjar | 01251 |
| Jind | 01681 |
| Julana | 01683 |
| Kaithal | 01746 |
| Kalanaur | 01258 |
| Kalanwali | 01696 |
| Kalka | 01733 |
| Karnal | 0184 |
| Kosli | 01259 |
| Kurukshetra | 01744 |
| Loharu | 01252 |
| Meham | 01257 |
| Mahendragarh | 01285 |
| Naraingarh | 01734 |
| Narnaul | 01282 |
| Narwana | 01684 |
| Nilokheri | 01745 |
| Nuh | 01267 |
| Palwal | 01275 |
| Panipat | 0180 |
| Pehowa | 01741 |
| Ratia | 01697 |
| Rewari | 01274 |
| Rohtak | 01262 |
| Safidon | 01686 |
| Sirsa | 01666 |
| Siwani | 01255 |
| Sonipat | 0130 |
| Tohana | 01692 |
| Tosham | 01253 |
