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Founded September 1, 1994; 22 years ago (1994-09-01)[1]
Area served
United States was a company that developed an Internet white pages directory for locating email addresses and collaborating using Internet phones, and videophones.

It also developed RocketMail, one of the first major, free webmail services. For a brief time, RocketMail battled with Hotmail for the number-one spot among free webmail services. Four11, including RocketMail, was acquired by Yahoo! in 1997 for $92 million[2] and used the RocketMail engine to create Yahoo! Mail.[3][4][5]