THIRDSUPPLEMENTAL INDENTURE

Exhibit 4.2

EXECUTION VERSION

THIRD SUPPLEMENTAL INDENTURE

THIRD SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”) dated as of May 18, 2016 among CCO Holdings, LLC, a Delaware limited liability company, and the subsidiary guarantors named on Schedule I hereto (collectively, the “New Guarantors”) and The Bank of New York Mellon Trust Company, N.A., a national banking association, as trustee (the “Trustee”) and collateral agent (the “Collateral Agent”) under the Indenture referred to below.

W I T N E S S E T H:

WHEREAS Charter Communications Operating, LLC, a Delaware limited liability company, and Charter Communications Operating Capital Corp. (or its successor), a Delaware corporation (together, the “Issuers”) and CCO Safari II, LLC, a Delaware limited liability company, have heretofore executed and delivered to the Trustee an indenture, dated as of July 23, 2015, as amended by the First Supplemental Indenture, dated as of July 23, 2015, and the Second Supplemental Indenture, dated as of the date hereof (as amended, supplemented or otherwise modified, the “Indenture”), providing for the issuance of the Issuers’ Notes;

WHEREAS pursuant to Section 9.01 of the Indenture, the Trustee, the Collateral Agent the Issuers and other Guarantors, if any, are authorized to execute and deliver this Supplemental Indenture;

NOW THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the New Guarantors, the Issuers and the Trustee mutually covenant and agree for the equal and ratable benefit of Holders as follows:

1. Defined Terms. As used in this Supplemental Indenture, terms defined in the Indenture or in the preamble or recital hereto are used herein as therein defined, except that the term “Holders” in this Supplemental Indenture shall refer to the term “Holders” as defined in the Indenture and the Trustee acting on behalf of and for the benefit of such Holders. The words “herein,” “hereof” and “hereby” and other words of similar import used in this Supplemental Indenture refer to this Supplemental Indenture as a whole and not to any particular section hereof.

2. Agreement to Guarantee. Each of the New Guarantors hereby agrees, jointly and severally with each other and all existing guarantors (if any), to unconditionally guarantee the Issuers’ Obligations under the Notes and the Indenture on the terms and subject to the conditions set forth in Article 10 of the Indenture and to be bound by all other applicable provisions of the Indenture and the Notes and to perform all of the obligations and agreements of a Note Guarantor under the Indenture until released pursuant to the terms of the Indenture. Each of the New Guarantors will be entitled to the benefits set forth in Article 10 of the Indenture, including the release provisions set forth in Section 10.02(b) thereof.

3. Notices. All notices or other communications to the New Guarantors shall be given as provided in Section 12.02 of the Indenture.

4. Ratification of Indenture; Supplemental Indentures Part of Indenture. Except as expressly amended hereby, the Indenture is in all respects ratified and confirmed and all the

1

terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all purposes, and every Holder heretofore or hereafter authenticated and delivered shall be bound hereby.

5. Governing Law. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW.

6. Trustee Makes No Representation. The Trustee makes no representation as to the validity or sufficiency of this Supplemental Indenture.

7. Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement.

8. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction thereof.

2

IN WITNESS WHEREOF, the parties hereto have caused this Third Supplemental Indenture to be duly executed as of the date first above written.

[Signature Page to Third Supplemental Indenture]

[Signature Page to Third Supplemental Indenture]

Schedule I

Subsidiary Guarantors

Adcast North Carolina Cable Advertising, LLC

Alabanza LLC

America’s Job Exchange LLC

Coaxial Communications of Central Ohio LLC

DukeNet Communications Holdings, LLC

DukeNet Communications, LLC

ICI Holdings, LLC

Insight Blocker LLC

Insight Capital LLC

Insight Communications Company LLC

Insight Communications Company, L.P.

Insight Communications Midwest, LLC

Insight Communications of Central Ohio, LLC

Insight Communications of Kentucky, L.P.

Insight Interactive, LLC

Insight Kentucky Capital, LLC

Insight Kentucky Partners I, L.P.

Insight Kentucky Partners II, L.P.

Insight Midwest Holdings, LLC

Insight Midwest, L.P.

Insight Phone of Indiana, LLC

Insight Phone of Kentucky, LLC

Insight Phone of Ohio, LLC

Interactive Cable Services, LLC

Intrepid Acquisition LLC

NaviSite LLC

New Wisconsin Procurement LLC

Oceanic Time Warner Cable LLC

Parity Assets, LLC

Time Warner Cable Business LLC

Time Warner Cable Enterprises LLC

Time Warner Cable Information Services (Alabama), LLC

Time Warner Cable Information Services (Arizona), LLC

Time Warner Cable Information Services (California), LLC

Time Warner Cable Information Services (Colorado), LLC

Time Warner Cable Information Services (Hawaii), LLC

Time Warner Cable Information Services (Idaho), LLC

Time Warner Cable Information Services (Illinois), LLC

Time Warner Cable Information Services (Indiana), LLC

Time Warner Cable Information Services (Kansas), LLC

Time Warner Cable Information Services (Kentucky), LLC

Time Warner Cable Information Services (Maine), LLC

Time Warner Cable Information Services (Massachusetts), LLC

I-1

Time Warner Cable Information Services (Michigan), LLC

Time Warner Cable Information Services (Missouri), LLC

Time Warner Cable Information Services (Nebraska), LLC

Time Warner Cable Information Services (New Hampshire), LLC

Time Warner Cable Information Services (New Jersey), LLC

Time Warner Cable Information Services (New Mexico) LLC

Time Warner Cable Information Services (New York), LLC

Time Warner Cable Information Services (North Carolina), LLC

Time Warner Cable Information Services (Ohio), LLC

Time Warner Cable Information Services (Pennsylvania), LLC

Time Warner Cable Information Services (South Carolina), LLC

Time Warner Cable Information Services (Tennessee), LLC

Time Warner Cable Information Services (Texas), LLC

Time Warner Cable Information Services (Virginia), LLC

Time Warner Cable Information Services (Washington), LLC

Time Warner Cable Information Services (West Virginia), LLC

Time Warner Cable Information Services (Wisconsin), LLC

Time Warner Cable International LLC

Time Warner Cable Internet Holdings III LLC

Time Warner Cable Internet Holdings LLC

Time Warner Cable Internet LLC

Time Warner Cable Media LLC

Time Warner Cable Midwest LLC

Time Warner Cable New York City LLC

Time Warner Cable Northeast LLC

Time Warner Cable Pacific West LLC

Time Warner Cable Services LLC

Time Warner Cable Southeast LLC

Time Warner Cable Sports LLC

Time Warner Cable Texas LLC

TWC Administration LLC

TWC Communications, LLC

TWC Digital Phone LLC

TWC Media Blocker LLC

TWC NewCo LLC

TWC News and Local Programming Holdco LLC

TWC News and Local Programming LLC

TWC Regional Sports Network I LLC

TWC Security LLC

TWC SEE Holdco LLC

TWC Wireless LLC

TWC/Charter Dallas Cable Advertising, LLC

TWCIS Holdco LLC

Wisconsin Procurement Holdco LLC

Bright House Networks, LLC

Bright House Networks Information Services (Alabama), LLC

I-2

Bright House Networks Information Services (California), LLC

Bright House Networks Information Services (Florida), LLC

Bright House Networks Information Services (Indiana), LLC

Bright House Networks Information Services (Michigan), LLC

BHN Spectrum Investments, LLC

BHN Home Security Services, LLC

American Cable Entertainment Company, LLC

Athens Cablevision, LLC

Ausable Cable TV, LLC

Bresnan Broadband Holdings, LLC

Bresnan Broadband of Colorado, LLC

Bresnan Broadband of Montana, LLC

Bresnan Broadband of Utah, LLC

Bresnan Broadband of Wyoming, LLC

Bresnan Communications, LLC

Bresnan Digital Services, LLC

Bresnan Microwave of Montana, LLC

Cable Equities Colorado, LLC

Cable Equities of Colorado Management LLC

CC 10, LLC

CC Fiberlink, LLC

CC Michigan, LLC

CC Systems, LLC

CC V Holdings, LLC

CC VI Fiberlink, LLC

CC VI Operating Company, LLC

CC VII Fiberlink, LLC

CC VIII Fiberlink, LLC

CC VIII Holdings, LLC

CC VIII Operating, LLC

CC VIII, LLC

CCO Fiberlink, LLC

CCO Holdco Transfers VII, LLC

CCO LP, LLC

CCO NR Holdings, LLC

CCO Purchasing, LLC

CCO SoCal I, LLC

CCO SoCal II, LLC

CCO SoCal Vehicles, LLC

CCO Transfers, LLC

Charter Advanced Services (AL), LLC

Charter Advanced Services (CA), LLC

Charter Advanced Services (CO), LLC

Charter Advanced Services (CT), LLC

Charter Advanced Services (GA), LLC

Charter Advanced Services (IL), LLC

I-3

Charter Advanced Services (IN), LLC

Charter Advanced Services (KY), LLC

Charter Advanced Services (LA), LLC

Charter Advanced Services (MA), LLC

Charter Advanced Services (MD), LLC

Charter Advanced Services (MI), LLC

Charter Advanced Services (MN), LLC

Charter Advanced Services (MO), LLC

Charter Advanced Services (MS), LLC

Charter Advanced Services (MT), LLC

Charter Advanced Services (NC), LLC

Charter Advanced Services (NE), LLC

Charter Advanced Services (NH), LLC

Charter Advanced Services (NV), LLC

Charter Advanced Services (NY), LLC

Charter Advanced Services (OH), LLC

Charter Advanced Services (OR), LLC

Charter Advanced Services (PA), LLC

Charter Advanced Services (SC), LLC

Charter Advanced Services (TN), LLC

Charter Advanced Services (TX), LLC

Charter Advanced Services (UT), LLC

Charter Advanced Services (VA), LLC

Charter Advanced Services (VT), LLC

Charter Advanced Services (WA), LLC

Charter Advanced Services (WI), LLC

Charter Advanced Services (WV), LLC

Charter Advanced Services (WY), LLC

Charter Advanced Services VIII (MI), LLC

Charter Advanced Services VIII (MN), LLC

Charter Advanced Services VIII (WI), LLC

Charter Advertising of Saint Louis, LLC

Charter Cable Operating Company, LLC

Charter Cable Partners, LLC

Charter Communications Entertainment I, LLC

Charter Communications Entertainment II, LLC

Charter Communications Entertainment, LLC

Charter Communications of California, LLC

Charter Communications Properties LLC

Charter Communications V, LLC

Charter Communications Ventures, LLC

Charter Communications VI, L.L.C.

Charter Communications VII, LLC

Charter Communications, LLC

Charter Distribution, LLC

Charter Fiberlink - Alabama, LLC

I-4

Charter Fiberlink – Georgia, LLC

Charter Fiberlink – Illinois, LLC

Charter Fiberlink – Maryland II, LLC

Charter Fiberlink – Michigan, LLC

Charter Fiberlink – Missouri, LLC

Charter Fiberlink – Nebraska, LLC

Charter Fiberlink – Pennsylvania, LLC

Charter Fiberlink – Tennessee, LLC

Charter Fiberlink AR-CCVII, LLC

Charter Fiberlink CA-CCO, LLC

Charter Fiberlink CC VIII, LLC

Charter Fiberlink CCO, LLC

Charter Fiberlink CT-CCO, LLC

Charter Fiberlink LA-CCO, LLC

Charter Fiberlink MA-CCO, LLC

Charter Fiberlink MS-CCVI, LLC

Charter Fiberlink NC-CCO, LLC

Charter Fiberlink NH-CCO, LLC

Charter Fiberlink NV-CCVII, LLC

Charter Fiberlink NY-CCO, LLC

Charter Fiberlink OH-CCO, LLC

Charter Fiberlink OR-CCVII, LLC

Charter Fiberlink SC-CCO, LLC

Charter Fiberlink TX-CCO, LLC

Charter Fiberlink VA-CCO, LLC

Charter Fiberlink VT-CCO, LLC

Charter Fiberlink WA-CCVII, LLC

Charter Helicon, LLC

Charter Home Security, LLC

Charter Leasing Holding Company, LLC

Charter Leasing of Wisconsin, LLC

Charter RMG, LLC

Charter Stores FCN, LLC

Charter Video Electronics, LLC

Falcon Cable Communications, LLC

Falcon Cable Media, a California Limited Partnership

Falcon Cable Systems Company II, L.P.

Falcon Cablevision, a California Limited Partnership

Falcon Community Cable, L.P.

Falcon Community Ventures I Limited Partnership

Falcon First Cable of the Southeast, LLC

Falcon First, LLC

Falcon Telecable, a California Limited Partnership

Falcon Video Communications, L.P.

Helicon Partners I, L.P.

Hometown T.V., LLC

I-5

HPI Acquisition Co. LLC

Interlink Communications Partners, LLC

Long Beach, LLC

Marcus Cable Associates, L.L.C.

Marcus Cable of Alabama, L.L.C.

Marcus Cable, LLC

Midwest Cable Communications, LLC

Peachtree Cable TV, L.P.

Peachtree Cable TV, LLC

Phone Transfers (AL), LLC

Phone Transfers (CA), LLC

Phone Transfers (GA), LLC

Phone Transfers (NC), LLC

Phone Transfers (TN), LLC

Phone Transfers (VA), LLC

Plattsburgh Cablevision, LLC

Renaissance Media LLC

Rifkin Acquisition Partners, LLC

Robin Media Group, LLC

Scottsboro TV Cable, LLC

Tennessee, LLC

The Helicon Group, L.P.

Vista Broadband Communications, LLC

VOIP Transfers (AL), LLC

VOIP Transfers (CA) LLC

VOIP Transfers (GA), LLC

VOIP Transfers (NC), LLC

VOIP Transfers (TN), LLC

VOIP Transfers (VA), LLC

I-6