Michael Anwyl, 33, of Irwin Avenue, Limvady, handed himself in to Coleraine Police Station yesterday.
He was arrested and questioned by NCA investigators, and later charged with conspiring to supply class A and B drugs, plus being concerned in the supply of class A, B and C drugs.
It follows the arrest of four other people last week in Lisburn, Antrim, Crumlin and Limavady.
The NCA investigation was launched after analysis of messages shared on Encrochat, the encrypted messaging platform that was brought down earlier this year as part of Operation Venetic.
