AT&T Inc. agreed to buy the consumer fiber operations of Lumen Technologies Inc. for $5.75 billion, expanding its fast broadband service in major cities like Denver and Las Vegas.

AT&T announced on Wednesday it was acquiring virtually all of Lumen’s mass markets fiber business, in a $5.75 billion all-cash transaction that will help the telecom giant extend its reach to 60 million locations.

US telco giant AT&T has reached an agreement to acquire substantially all of Lumen’s Mass Markets fibre business for $5.75 billion (€5bn), subject to pu