In 2004, Level 3 acquired ICG Communications' wholesale dial-up business for $35 million. 2001 to 2010 Īccording to Level3's own history, in 2003, the company acquired Genuity, and, between 20, it purchased several other companies including former rivals WilTel Communications, Broadwing Corporation, Looking Glass Networks, Progress Telecom, and Telcove (formerly Adelphia Business Solutions). According to Level3's own history, it continued to build its telecommunications network after going public. That same year saw it make an IPO on NASDAQ. The division was spun off as a separate entity and changed its name to Level 3 Communications in 1998 to signify an increased focus on communication services. In 1985, Peter Kiewit Sons' Inc created a subsidiary named Kiewit Diversified Group to manage the corporation's business that was not related to construction. Level 3 became part of CenturyLink on November 1, 2017.

On October 31, 2016, CenturyLink announced an agreement to acquire Level 3 Communications in a cash and stock transaction. Level 3 was also the largest competitive local exchange carrier (CLEC) and the 3rd largest provider of fiber-optic internet access (based on coverage) in the United States.

The company provided core transport, IP, voice, video, and content delivery for medium-to-large Internet carriers in North America, Latin America, Europe, and selected cities in Asia. It ultimately became a part of CenturyLink (now Lumen Technologies), where Level 3 President and CEO Jeff Storey was installed as Chief Operating Officer, becoming CEO of CenturyLink one year later in a prearranged succession plan. Level 3 Communications was an American multinational telecommunications and Internet service provider company headquartered in Broomfield, Colorado.

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