How To Contact Optimum Customer Service

by Mark Chen | Updated 12/21/23

The number of numbers that you can call Optimum customer service with is confusing.  They have different lines for different states even though they’re only in 3 states.

Customers agree.  Optimum has an award-winning 1,000+ 1-star reviews on yelp.

If you want to save money on your Optimum bill but don’t want to deal with these clowns, sign up for BillSmart.

We save our clients $354 on average and our success rate is 83%. Sign up by clicking the link below.

List of Optimum Numbers

Below is a list of some of the main Optimum customer support numbers that we found in our research.

Optimum Customer Service Numbers
Long Island Optimum Customer Support: (631) 393-0637
Brooklyn Optimum Customer Support: (718) 860-3514
NJ Optimum Customer support: (973) 230-6048
CT Optimum Customer Support: (203) 870-2583
Optimum Business: (888) 276-5255
Mobile: (866) 200-7186

Optimum Retention Department: (877) 936-4778

Customer Support Numbers By State

Optimum has different customer support lines for different cities and states.

It’s kind of hilarious.  Here’s the list below.

Optimum Customer Service Numbers By City
Optimum Long Island: (631) 393-0637
Bronx/Brooklyn Optimum Line: (718) 860-3514
Optimum New Jersey: (973) 230-6048
Connecticut Optimum Support: (203) 870-2583
Optimum North Carolina: (877) 491-0500

The hours for Optimum customer service for all cities and states are 8 am to 9 pm Monday to Friday and Saturday and Sunday 8 am to 7 pm.

If you’re in Connecticut, you can reach Optimum customer support at (203) 870-2583.  Sales can be reached at (203) 870-2492.

You can contact Optimum customer support in Long Island at (631) 393-0637.  The number for residential sales in Long Island is (631) 393-0707.

For New Jersey especially Sparta NJ, call (973) 230-6048 for Optimum customer service and (973) 230-2037.

In New York for the Bronx, Brooklyn, and Westchester, the phone number for Optimum customer service is (718) 860-3514.  Residential sales is (718) 975-1140.

If you want to lower your Optimum bill, your best bet is to call the specific phone number for your state/city rather than the general Optimum support line.

optimum customer service phone number
Does anyone have a good experience with them?

Optimum 24/7 Customer Support

Optimum technically doesn’t have 24/7 customer service.

Their residential hours are 8 am to 9 pm Monday-Friday and Saturday and Sunday 8 am-7 pm.

However, Optimum Business technical support is open 24/7 and you can call them at (888) 276-5255 to resolve most of your issues as their agents are cross-trained for residential accounts.

That means that for most Optimum customers, they only have a short window to find better deals to save the money as existing Optimum customers.

Optimum Chat Support

You can chat with Optimum customer service at

Just click message us and type in speak to a representative.

They’ll ask you for your account information before connecting you with a representative.

Don’t worry if you don’t have that info, just keep asking to speak to a representative and they’ll eventually connect you to one.

They’ll want your info and what issues you’re having. They want you to solve your problem on your own.

If you can’t solve your problem on your own, they prefer it if their agents has your information on hand before speaking to you.

You can also chat with Optimum business customer support online.  Before they’ll connect you to a rep, they’ll ask you to provide your first and last name, phone number, and access code.

You don’t actually need that information, you can just give fake data and get them to locate your account another way. 

It will make your chat experience faster if the rep is able to access the account before they talk to you.

Optimum Business Customer Service

You can reach Optimum business at (888) 276-5255 or by chatting with them online at

They also have more specialized lines for services like technical support and mobile phones

Optimum Business Customer Support Lines
Billing/General Customer Support: (888) 276-5255
Technical support: (888) 276-5255
Installation: (855) 267-8468
Mobile Phone: (866) 200-7186

The general customer support line for Optimum business is (888) 276-5255.  They are open Monday to Friday 9 am to 5 pm ET.  They are closed on Sundays but open on Saturday 9 am to 1 pm.

You can contact Optimum technical support at (888) 276-5255.  They are open 24/7.  They can also help you with your general customer support and billing issues although these changes might not apply until the next business day.

If you’re installing Optimum business service, you can call (855) 267-8468.  They’re open from 8 am to 7 pm Monday to Friday.

For Optimum Mobile Business service, contact (866) 200-7186.  They’re open seven days a week from 7 am to 12 am.

Optimum Tech Support

Optimum does not have a specified tech support line for residential services.  To get technical support for Optimum, call the support lines for the state you’re in.

However, they have a dedicated tech support line for Optimum business at (888) 276-5255.  Optimum business technical support is open 24 hours a day 7 days a week.

Optimum Mobile Customer Support

You can contact Optimum mobile customer service and technical support at (866) 200-7186.

You can also call 611 from an Optimum phone to talk to support as well.

Their call centers are open 8 am to 10 pm Eastern Time during weekdays.  On Saturdays, they’re open 8 am to 8 pm and on Sunday they’re open 9 am to 9 pm.

Optimum mobile also has sales phone numbers you can call.

The Optimum mobile sales phone number for New York, New Jersey, and Connecticut is (866) 213-3203.

For sales for all other regions, you can call (844) 215-5225. You can also reach optimum mobile customer service by chatting with them online here.

Optimum Sales Number

Optimum has separate sales numbers for the different states and businesses they operate in.  Here’s the list below.

Optimum Sales Phone Numbers
Residential Sales: (866) 347-4784
Optimum Business Sales: (855) 267-8468
Connecticut: (203) 870-2493
Long Island: (631) 393-0707
New Jersey: (973) 230-2037
New York: (718) 975-1140

I don’t know why you’d want to call Optimum sales but here you go.

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It’s too bad that Optimum makes it really confusing and difficult to get in touch with them.

They can’t avoid us though.

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BillSmart CEO

About the author

Mark Chen is the founder and CEO of BillSmart. As a 7-year veteran of the bill negotiation space, he's saved Americans $25mm+ on their phone and cable bills. In his free time, he enjoys watching shows on TV like Yellowstone and college football.