Nigeria suspended the microblogging site last June after a tweet by President Muhammadu Buhari, that referenced the civil war, was deleted.
Twitter has registered in Nigeria, according to the BBC.
Twitter "established a legal entity in Nigeria", months after the social media firm agreed to conditions set out by the government for its service to be restored in the country, the report stated.
Recall that Nigeria suspended the microblogging site last June after a tweet by President Muhammadu Buhari, that referenced the civil war, was deleted.
Twitter had said the post violated its rules; the government accused the company of taking sides.
The seven-month ban was lifted in January after Twitter agreed to various conditions, one of which was that it register in Nigeria before March.
A Twitter representative confirmed to the BBC that the company now had a legal presence in Nigeria but did not state when this had happened.
The company also told the BBC that it was complying with tax obligations in Nigeria, as it does globally.