"Many (parties) are interested, more than a dozen candidates," said Altice Portugal chief executive Alexandre Fonseca, who did not name any of the potential buyers.
Fonseca described the business as "valuable" and said that was reflected in the number of interested parties who have been analysing it, but declined to estimate a sale price.
"This network has a lot of value because of its size, its modernity, capillarity, and the fact that it can accommodate new services and new operators," he said.
Sources told Reuters last month the Altice Group was running a process to find a buyer for part of Altice's Portuguese fibre network and had asked interested parties to submit indicative offers by mid-March.
"In Europe we are the most advanced country in terms of fibre penetration in the total population, followed by Estonia, which is a smaller country, and we will cover about 100 percent (of Portugal) next year," Fonseca said.