It's Optimum, or it's not.®
Are You a Business?
Our customers stay with us because they want to, not because they have to. If they have any questions or concerns they know that an experienced local support team is just a phone call away. Enjoy 24/7 customer service; get the information you need at a time that's convenient for you.
If you need help from Cablevision's customer support team, see the table below for the availability of the team.
| Functions | Hours of Operation | Days |
| Sales - 1-800-613-9857 | 8:30 a.m. - 9 p.m. | Monday - Friday |
| Customer Service - 1-866-575-8000 | 24 hours | 7 days a week |
| Installation & Pending Surveys | 8:30 a.m. - 5:30 p.m. | Monday - Friday |
| Technical Support | ||
| Optimum Online for business | 24 hours | 7 days a week |
| iO Interactive Optimum for business | 24 hours | 7 days a week |
| Optimum Voice for business | 24 hours | 7 days a week |
Pricing, terms, and offers subject to change and discontinuance without notice. All trademarks and service marks are the property of their respective owners. All services not available in all areas. ©CSC Holdings, Inc.