Independent authorized sales agentOptimum Customer Service: Official Support Options
Order new Optimum service through Reliable Internet Inc. Availability and pricing vary by address.
New customers onlyPlus taxes and feesStandard rates after the promoIndependent authorized sales agent, not Optimum
We may earn a commission. How we're paid
Check availability at your address
(888) 428-0573- Authorized sales agentWe sell participating providers' plans; we are not the provider.
- Prices from provider sitesEach price links to its source and check date.
- Availability by addressCoverage is confirmed for your exact address.
- Order by phoneTalk to a person at (888) 428-0573.
How to Reach Optimum Support
optimum.com/internet FAQ and fine print, checked Oct 26, 2026.
- 24/7 support by phone, online chat and social media
- 125+ Optimum stores for in-person help
- Upgrade by signing in at optimum.net, in store, or via customer service
- Cancel at 877-794-2724 or by logging in at optimum.net (per Optimum fine print)
Optimum support numbers
Source: https://www.optimum.com/internet, checked Oct 26, 2026.
Shopping for a New Plan?
Call (888) 428-0573 to order or compare plans. Reliable Internet Inc is an authorized sales agent; not Optimum's support line.
Call (888) 428-0573Reliable Internet Inc is an independent authorized sales agent, not Optimum. We may receive a commission when you order; this does not change your price. Prices and availability vary by address and can change. See our advertising disclosure.
Questions about Optimum?
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