US President Donald Trump is eagerly giving his phone number to the world leaders and urging them to call him directly, AP reported.

Nevertheless, as it is marked, such an unusual invitation that breaks diplomatic protocol and is raising concerns about the security and secrecy of the U.S. commander in chief’s communications.

Trump exchanged numbers with French President Emmanuel Macron, Mexican President Enrique Peña Nieto and Canadian Prime Minister Justin Trudeau.

Only Canadian Prime Minister has taken advantage of the offer so far, the officials said.