In 2005, with the disestablishment of Naval Security Group (NAVSECGRU), NETWARCOM brought the former Naval Security Group Activities (NSGAs) under its umbrella, designating them Naval Information Operation Center(s) (NIOC) and Naval Information Operation Detachment(s)  (NIOD).
In 2005, after the disbandment of NAVSECGRU, NETWARCOM absorbed the former NSGAs under its control, reclassifying them as NIOC and NIOD.