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