The first draft, with 1.9 crore names, was released on the intervening night of December 31 and January 1, this year.
Assam is the first Indian state where the NRC is being updated after 1951, with March 24, 1971 as the cut-off date, to include names of "genuine Indian citizens".
The CM thanked the officials, who were involved in updating the NRC.
"For this remarkable feat, I extend my heartiest congratulations to the 55,000 officials engaged in NRC updation process and the people living across the Barak and Brahmaputra valleys, plains and hills of the state," he said.
Sonowal expressed confidence that the NRC, which has become the "instrument to safeguard the interest of greater Assamese society", would be able to pave the way for realising the hopes and aspirations of the genuine Indian citizens.
Both the central and the state governments have extended their support from the very beginning of the NRC publication exercise, he asserted.
"After the government led by the BJP and its allies assumed power in 2016 in the state, I went to the NRC office on May 25 that year to take forward the process," he said.
Sonowal also urged people not to panic if their names did not appear in NRC draft as genuine Indian citizens would get "full opportunity" to make claims and objections.
"NRC is a national programme. It is the duty and obligation of every Indian citizen to maintain peace in the wake of its publication. I appeal to all sections of the society to desist from making any inflammatory or communal remarks," he added.
The names of 40.07 lakh applicants did not find a place in the historic document, touted to be a proof of Assamese identity.
The NRC will include the names of all Indian citizens who have been residing in Assam before March 25, 1971.
The application process for the NRC started in May 2015 and a total of 6.5 crore documents were received from 68.27 lakh families across Assam.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)