Optimum Headquarters Address, Corporate Office Location, and Contact Details
About
Optimum Communications, Inc. is an American telecommunications company providing cable TV, fiber and broadband internet, telephone, and mobile services to residential and business customers. Headquartered at 1 Court Square West in Long Island City, Queens, New York City, Optimum is the successor brand to Altice USA — which itself was built from the 2016 acquisition of Cablevision by French-Israeli telecom conglomerate Altice N.V. In November 2025, the company officially rebranded its corporate name from Altice USA, Inc. to Optimum Communications, Inc. and changed its NYSE ticker from ATUS to OPTU, consolidating its consumer-facing brand with its corporate identity. Optimum serves approximately 4.2 million broadband subscribers and 1.63 million pay TV subscribers across 21 states as of Q3 2025. The company is in the midst of a multi-year operational turnaround under CEO Dennis Mathew, having faced significant headwinds from heavy debt loads, rising competition from fiber overbuilders, and subscriber losses across both broadband and pay TV.
Important context: Directories that still list this company as “Cablevision” or “Altice USA” are outdated. The company’s current legal name is Optimum Communications, Inc., its current NYSE ticker is OPTU, and its headquarters remains at 1 Court Square West, Long Island City, NY 11101.
Quick Facts
Founded
1985 (as Cablevision’s Optimum brand)
HQ
1 Court Square West, Long Island City (Queens), NY 11101
Operational center
1111 Stewart Ave, Bethpage, NY 11714 (legacy Cablevision campus)
Plano, TX office
5830 Granite Pkwy, Plano, TX 75024
Industry
Cable & Fiber Broadband / TV / Internet / Mobile
Legal name
Optimum Communications, Inc. (formerly Altice USA, Inc.)
NYSE Ticker
OPTU (formerly ATUS)
Chairman & CEO
Dennis Mathew (since February 2022)
CFO
Marc Sirota
General Counsel & CCO
Michael Olsen
Revenue (Q3 2025)
$2.11 billion (quarterly), down 5.4% YoY
Broadband subscribers (Q3 2025)
4.2 million
Pay TV subscribers (Q3 2025)
1.63 million
Employees
~5,000–10,000
What Brings You Here? Find the Right Contact
Residential customer — internet, TV, or phone issue
Contact Optimum by region. Long Island: 631-393-0637. Bronx, Brooklyn, Westchester: 718-860-3514. New Jersey & Pennsylvania: 973-230-6048. Connecticut: 203-870-2583. North Carolina: 877-491-0050. All other areas: 877-694-9474. Live chat is available 24/7 at optimum.com/contact-us.
New service / check availability
Call 1-866-347-4784 or visit optimum.com to check service availability and order new residential or business services.
Optimum Mobile inquiries
Optimum Mobile operates as an MVNO (mobile virtual network operator) on T-Mobile’s network. For mobile billing, porting, or plan changes, call 1-866-347-4784 and select the mobile option, or manage your account online.
Business services (Optimum Business)
Call 1-855-267-8468 or visit optimum.com/business. Dedicated business services teams are led by President of Business Services Michael Parker.
Corporate / vendor / supplier
Contact the corporate headquarters at 1 Court Square West, Long Island City, NY 11101, or call the corporate switchboard at 1-516-803-2300.
Media / press
Contact Optimum’s communications team through the investor relations portal at investors.optimum.com or via the corporate switchboard.
Investor relations
Visit investors.optimum.com or contact Sarah Freedman, Investor Relations, at sarah.freedman@optimum.com. Optimum trades on NYSE as OPTU.
Legal / subpoena
Serve Optimum Communications, Inc. (formerly Altice USA, Inc.), 1 Court Square West, Long Island City, NY 11101.
Phone Directory
Long Island Customer Service
631-393-0637 — Nassau and Suffolk Counties, NY.
Bronx, Brooklyn & Westchester
718-860-3514 — NYC metro and Westchester residents.
New Jersey & Pennsylvania
973-230-6048
Connecticut
203-870-2583
North Carolina
877-491-0050
All other areas / general
877-694-9474
New Service / Sales
1-866-347-4784
Corporate Headquarters
1-516-803-2300 — Main corporate switchboard at 1 Court Square West. For vendor, media, and executive-level inquiries. Mon–Fri business hours.
Corporate Headquarters Address
Principal executive office
Optimum Communications, Inc.
1 Court Square West
Long Island City (Queens), NY 11101
United States
Operational center (former Cablevision campus)
1111 Stewart Avenue
Bethpage, NY 11714
Plano, TX regional office
5830 Granite Parkway
Plano, TX 75024
The Long Island City headquarters serves as the principal registered executive office following the company’s rebranding to Optimum Communications in November 2025. The Bethpage campus on Long Island is Optimum’s legacy operational center — formerly the headquarters of Cablevision — and houses a substantial portion of the company’s technical, operations, and support workforce. Neither location operates as a walk-in customer service facility. All residential and business service inquiries should be handled by phone or via live chat at optimum.com.
How to Escalate a Complaint
- Call your regional service line first — Use the regional numbers listed above based on where you live. Document the call date, rep name, and case or ticket number provided. For billing disputes, specifically request a billing supervisor on the first call.
- Use live chat for a written record — Chat at optimum.com/contact-us is available 24/7. Chat transcripts serve as written documentation of your complaint and reported resolutions.
- Request escalation to the Retention or Executive Resolution team — When calling any Optimum regional line, ask specifically to be transferred to the Retention department or an Executive Resolution specialist. These teams have more authority to approve credits, waive fees, and override standard support decisions.
- Send a certified letter to HQ — Write to Optimum Communications, Inc., 1 Court Square West, Long Island City, NY 11101. Include your account number, service address, dates of prior contact, and the specific resolution you are requesting.
- File with the FCC — The FCC regulates cable and broadband providers. File a complaint at consumercomplaints.fcc.gov. An FCC filing requires Optimum to formally respond within 30 days.
- File with your State Public Utilities Commission — New York, New Jersey, Connecticut, and North Carolina all have state-level PUC or PSC authorities that regulate cable and broadband service quality. File with the relevant state body for unresolved service or billing issues.
- File with the BBB — Optimum is listed with the BBB. Note: Optimum / Altice USA has historically received a very high volume of BBB complaints. Filing at bbb.org still creates a formal record requiring corporate response.
Executive Leadership
Dennis Mathew — Chairman & CEO (since February 2022)
Mathew joined Optimum (then Altice USA) as CEO in February 2022 after 17 years in senior leadership at Comcast, where he led the company’s largest geographic regions across all aspects of residential and commercial business. He was brought in to stabilize and reverse Altice USA’s declining subscriber base and mounting debt challenges. Under Mathew’s leadership, the company has undertaken a significant operational transformation: accelerating fiber deployment across its footprint, launching Optimum Mobile, improving customer satisfaction scores, and executing first-of-its-kind asset-backed financing to shore up its capital structure — including a $1 billion asset-backed loan secured by HFC assets in Q2 2025. In November 2025, he led the corporate rebranding from Altice USA to Optimum Communications. He was also named Chairman of the Board in connection with the rebrand. Despite these efforts, the company continues to lose broadband and pay TV subscribers amid intense competition. Mathew received a $750,000 special bonus in December 2025 for his role in capital raising efforts.
Marc Sirota — Chief Financial Officer
Sirota oversees all financial planning, treasury, reporting, and capital structure management at Optimum Communications. He was awarded a $600,000 special bonus in December 2025 for extraordinary contributions to the company’s capital raising activities during a challenging financing environment.
Michael Olsen — General Counsel & Chief Corporate Responsibility Officer
Olsen leads Optimum’s legal, compliance, and corporate responsibility functions. Like Sirota, he received a $600,000 special bonus in December 2025 for his role in the company’s capital raising efforts.
David Williams — President, Consumer Services
Leads all aspects of Optimum’s residential business, including sales, brand, marketing, customer acquisition and base management, and regional market strategies. Previously served as Chief Revenue Officer at the company from early 2023 before being elevated to President of Consumer Services in November 2023.
Michael Parker — President, Business Services
Leads Optimum’s B2B division, overseeing commercial connectivity, advertising, and business customer operations across the company’s 21-state footprint.
Leroy Williams — Chief Growth & Innovation Officer
Drives Optimum’s growth strategy, innovation pipeline, and new product development, with a focus on fiber and mobile expansion.