All participating nations are required to submit provisional squads of up to 30 players by Tuesday, with those groups being trimmed to 23 by June 2.
And Insigne is confident of being part of national coach Cesare Prandelli's plans for the tournament in Brazil after impressing for Rafael Benitez's side this season.
"I cannot deny that I am waiting for good news in the coming days," he is quoted as saying following Napoli's 5-2 win at Sampdoria on Sunday.
"I hope to be in the national team and I hope to win the full confidence of Prandelli. He knows me, knows what I can give, and in this respect I am calm."
Insigne scored two goals as Napoli won the Coppa Italia earlier this month and has four Italy caps to his name.
‘Even though it was late in the game, the Arsenal fans started singing my name. It felt like the moment I announced myself as a professional footballer’: Ex-Gunners star recalls scoring first senior goal as a teenager at Highbury
'I started to drive myself crazy': Former Manchester United midfielder explains why it all went wrong for him under Erik ten Hag
