The Wireless Institute of Australia, in March 2004, commenced its conversion from a federation of State or Territory based autonomous bodies, known as Divisions, to a single National body offering individual membership. The NSW Division agreed to inclusion in the National body in December 2004.

The National body is at present located in Melbourne and handles certain functions, such as fee collection, the amateur radio call-book, and representations to the Australian Communications and Media Authority.

Some of the Divisions amalgamated with the National body, surrendering completely their assets and functions. However, others, such as New South Wales and Victoria, retained State-based bodies controlling assets and certain services. The NSW body has changed its name to Amateur Radio New South Wales and remains as a company.

The Wireless Institute of Australia is the oldest amateur radio organisation in the world, founded in Sydney in 1910.
It is a member body of the International Amateur Radio Union.

Individual amateurs should join the National WIA and may also join ARNSW.
A range of fees is charged, and also a range of services is available.
Details are shown below or can be obtained by telephone, FAX, mail, E-mail, or from the WIA or ARNSW Web-sites.