ABN-2 Sydney began transmission on 5 November 1956. This logo was used in articles promoting the launch of the channel. The callsign stood for ABC New South Wales.
On 15 June 1963, relay station ABHN-5 Newcastle/Hunter River began transmission. ABHN would later convert to VHF-5A and in the 1990s moved to UHF-48.
On 28 October 1963, ABN-2 launched its Illawarra relay under the call sign ABWN on VHF channel 5A. This was followed on 31 March 1964 by ABCN-1 Central Tablelands, on 20 April by ABRN-6 Richmond/Tweed, on 30 March 1965 by ABMN-0 South Western Slopes/Eastern Riverina, on 28 June by ABDN-2 Grafton/Kempsey, on 27 September by ABUN-7 Upper Naomi, on 14 December by ABLN-2 Broken Hill, on 29 April 1966 by ABTN-1 Manning River, on 29 June by ABSN-8 Bega/Cooma, on 25 July by ABGN-7 Murrumbidgee Irrigation Area, on 12 September by ABQN-5 Central Western Slopes and on 1 January 1974 by ABMIN-10 Mungindi.
In February 1975, ABHN-5 moved channels to VHF-5A in order to accommodate FM radio. In 1988, ABQN-5 moved to VHF-11 in order to accommodate FM radio, in the same year ABWN-5A moved to UHF-56. Two years later, ABTN-1 would move to VHF-6.
Television in New South Wales and the Australian Capital Territory