Region 6A North came into existence for the 2013-2014 school year as part of a massive VHSL realignment. At inception, Region 6A North included Conferences 5, 6, 7, and 8. Conferences 5, 6, and 7 retained their old Distrct names as Concorde, Liberty and Patriot, respectively, even though membership in the latter two changed. Conference 8 consisted of the Prince William County schools that were members of the Cedar Run District. It is anticipated that Conference 8 will be retitled the Cedar Run Conference.
The Northern Region was one four AAA regions in the Virginia High School League structure. Effective school year 2013-2014, the three-tier State structure---AAA, AA, A---was replaced by a new six-tier structure. Northern Region schools were allocated to either of two new Regions, 6A North and 5A North, depending on school enrollment.
Here is a link to the former Northern Region website which was still used for school year 2013-2014. It is uncertain what will replace the old Northern Region master schedule.
Here is a Wikipedia discussion of the history of the Northern Region.