There are 11 extensions provided by the Nigeria Internet Registration Association (NIRA) and each is for a different class of usage, although your needs may determine which class you register your domain name on. Below is the list of available extensions of .ng domain and their category.
Class / Purpose
|.com.ng||Commercial Entities and General Purpose||None|
|.org.ng||Non-Profit Organisation and General Purpose||None|
|.net.ng||ISPs and Telecoms||Restricted|
|.sch.ng||Kindergarten, Primary & Secondary Schools and Colleges||None|
|.edu.ng||Colleges of Education, Polytechnics, and Universities||Restricted|
|.gov.ng||Federal, State, and Local Government Agencies||Restricted|