CenturyLink, Inc. is an American worldwide communications company headquartered in
Monroe, Louisiana. It provides communications and data services to residential, business, governmental and wholesale customers in 36 states. A member of the
S&P 500 index, the company operates as a
local exchange carrier and
Internet service provider in U.S. markets and is the third-largest telecommunications company in the United States in terms of lines served, behind
AT&T and
Verizon. It also provides
long distance service.