Singapore Telecommunications Limited (SGX: T48, ASX: SGT, OTC Pink: SGAPY), commonly abbreviated as SingTel, is a Singaporean telecommunications company, with a combined mobile subscriber base of 416 million customers from its own operations and regional associates in 25 countries at end of June 2011 increased by 19 percent from a year ago, making it one of the largest mobile network operators in the world. The company was known as Telecommunications Equipment until 1995. SingTel provides ISP (SingNet), IPTV (mio TV), mobile phone (SingTel Mobile Singapore) and fixed line telephony services.

SingTel has expanded aggressively outside its home market and owns shares in many regional operators, including 100% of the second largest Australian telco, Optus, which was acquired in 2000 from Cable & Wireless and other shareholders of Optus, and 32% (second largest shareholder after the promoters) of Bharti Airtel, the largest telco in India.

SingTel is also the largest company by market capitalisation listed on the Singapore Exchange and is majority owned by Temasek Holdings, the investment arm of the Singapore government.