The current NCT route has run since 2005 but I don't recall if the predecessor took the number 9.
The Loughborough 9 has been turquoise, red and now blue and yellow.
As I understand from googling around the history of Loughborough to Nottingham being x99/99/red9/kinch9 has stemed from 1987 with the story I have wrote below...
This is important later but in 1929 Midland red started a X99 Birmingham to Nottingham service via Tamworth, Ashby-de-la-Zouch, Castle Donington and Long Eaton.
In 1981 Midland red was broken up into 4 companies (Midland red east, Midland red north, Midland Red south, and Midland red west)
Midland red east covered Leicestershire, south Derbyshire and east Staffordshire (Midland Fox in 1984) and Midland red north (now arriva Midland north) covered Staffordshire, Shropshire and parts of the West Midlands.
This ment the X99 which ran through Midland Red North and Midland Fox territory now was jointly operated by coalvile and Tamworth depots respectively.
In 1986, Midland fox started the 128 which went Coalville-Loughborough
In 1987 Midland fox then integrated it with the X99 Birmingham to Nottingham service as Midland Red North pulled back of the route, so Midland Fox rerouted the 128 from Coalville to nottingham via Loughborough and split the X99, which then ran via Coalville and Loughborough creating a new diverted version of the X99 now providing combined frequencys between the x99 and local Midland Fox routes like the 125, 127, and 128.
In 1989 the long distance X99 birmingham segment was dropped so they renumbered the short Coalville to Nottingham 128 journeys as the 99 route.
Then in the 1990s Arriva swallowed up Midland Fox and kept the 99 number as it was untill it got axed in 2009 replacing part of its service with the 126, which went from Coalville to Leicester.
In 2009 premier then took it over operating Loughborough to Nottingham originally as X9 later red9.
Following premiers collapse in 2013, Kinch then took over it as there number 9.
In conclusion since around 1987 Loughborough to Nottingham had the X99 (birmingham service when lomgeaton was dropped and was combined woth other local services) then 1989 it has the 99 from Coalville to nottingham lasting to 2009 then premier took it on as there X9/red9 then kinch got it following premiers collapse in 2013