Directorate General of Shipping on Saturday said contacts with hijacked vessel, MV Delight, had been established and the Indian crew on board was "safe and in good health".
All sailors are in good health and condition, the Directorate said in a release.
Iranian ship MV Delight with seven Indian sailors on board was hijacked by Somali pirates on November 18. Delight, which bears a Hong Kong flag, was carrying 38,000 tonnes of wheat and had 18 others apart from the Indian crew when it was hijacked near the Gulf of Eden.
The Emergency Response Committee of Islamic Republic of Iran Shipping Lines is in touch with the pirates, it said.
Communication between Emergency Response Committee and Delight has been established, it said.
The 18 other crew include two Pakistanis, seven Filipinos, seven Iranians and two Ghanians.
The Indian seafarers had been employed by a ship management firm in Mumbai.