Cablevision Systems Corp.

CABLEVISION SYSTEMS CORP. is a U.S. cable and telecommunications operator best known for the Optimum brand. Public filings and merger documentation show it was acquired by Altice on June 21, 2016, after which the business operated under the Altice USA umbrella.

Cablevision is associated with Autonomous System AS6128, listed in PeeringDB under “Cablevision Systems Corporation,” indicating an established ISP backbone with public peering presence. Public IP/ASN directories also attribute multiple netblocks to this ASN, but detailed current topology is not consistently described in open sources.

Online consumer feedback tied to “Cablevision/Optimum” is frequently negative, with recurring complaints around customer service and billing/retention experiences across large review aggregators. The volume of criticism is high enough to pull overall reputation below average, even though individual experiences vary.