IBB
You may be referring to Major General Ibrahim Badamasi Babangida, better known as IBB. He was the military ruler of Nigeria from August 1985 (he overthrew the previous leader, Muhammadu Buhari), and he ruled until his departure in 1993.
You can find a list of the codes and states on the Nigeria Postal service website. There are 37 different states in Nigeria.
Church of Nigeria was created in 1979.
Ecobank Nigeria was created in 1986.
Air Nigeria was created in 2004.
Vanguard - Nigeria - was created in 1983.
Nigeria Regiment was created in 1914.
Northern Nigeria was created in 1900.
Fidelity Bank Nigeria was created in 1988.
Nigeria Airways was created on 1958-08-23.
Southern Nigeria Protectorate was created in 1900.
Nigeria Police Force was created in 1930.