Triple J is most commonly found at 105.7 FM in Sydney and many guides treat 105.7 as “the” Triple J number because that’s the original flagship FM frequency for the station.

But there isn’t only one “Triple J number”

Triple J is a national Australian station, so the “number” (frequency) changes slightly depending on where you are listening. For example:

  • Sydney: 105.7 FM (call sign 2JJJ).
  • Melbourne: Broadcast locally as Triple J Melbourne on FM (often accessed online under that name).
  • Newcastle and some other areas: Local Triple J relays (e.g., a listing for Triple J Newcastle appears separately).

Because of this, if someone asks “what number is Triple J?” in a forum or quick chat, they’re usually talking about their local FM dial, and in a lot of online discussion that defaults to 105.7.

So in casual conversation, “Triple J” is often shorthand for 105.7 FM, but the exact number depends on your Australian city or region.

Information gathered from public forums or data available on the internet and portrayed here.