21st Century has grown to become a leading direct-to-consumer auto insurer. The company is an insurance carrier, selling and servicing its own policies, with over 3.5 million customers insured. In September 2007 21st Century joined forces with AIG Auto Insurance to brand their website as 21st.com/AIGdirect.com. AIG Auto is a subsidiary of AIG, one of the largest insurance companies in the world. 21st/AIG offers customers quick and convenient on-line quoting.