STD stands for Subscriber trunk dialing or subscriber toll dialing is a telephone system allowing subscribers to dial trunk calls without operator assistance.
THE STD CODES FOR DIFFERENT LOCATIONS OF ODISHA ARE:
| Angul: 06764 | Balasore: 06782 | Bargarh: 06646 |
| Bhadrak: 06784 | Bolangir: 06652 | Boudh: 06841 |
| Cuttack: 0671 | Deogarh: 06641 | Dhenkanal: 06762 |
| Gajapati: 06815 | Ganjam: 06811 | Jagatsinghpur: 06724 |
| Jajpur: 06728 | Jharsuguda: 06645 | Kalahandi: 06670 |
| Kandhamal: 06842 | Kendrapara: 06727 | Keonjhar: 06766 |
| Khurda: 06755 | Koraput: 06852 | Malkangiri: 06861 |
| Mayurbhanj: 06792 | nawarangpur: 06858 | Nayagarh: 06753 |
| Nuapada: 06678 | Puri: 06752 | Rayagada: 06856 |
| Sambalpur: 0663 | Subarnapur: 06654 | Sundargarh: 0661 |