Optus
（重定向自AUSSAT）
![Optus building in Melbourne, Victoria](/Images/godic/202412/22/Optus_Melbourne5821.jpg")
![Former Optus HQ, North Sydney, New South Wales.](/Images/godic/202412/22/NorthSydneyCity_Optus5821.jpg")
![Original 1990s logo](/Images/godic/202412/22/Optus_communications_logo5821.png"){kind=logo}
![Former Optus building in Adelaide, South Australia.](/Images/godic/202412/22/Optus_building_Adelaide_Australia5821.jpg")
Singtel Optus Pty Limited is the second largest telecommunications company in Australia. It is a wholly owned subsidiary of Singtel since 2001. The company primarily trades under the Optus brand, while maintaining several wholly owned subsidiary brands, such as Virgin Mobile Australia in the mobile telephony market, Uecomm in the network services market and Alphawest in the ICT services sector.