Optimum Internet Speed Test checks how fast is your internet speed. Simply press ‘GO’ and Speed.is will test download, upload, ping, and jitter speed.
Optimum is a telecommunication brand operated by Altice USA, one of the largest broadband communications and video service providers in the United States. It offers internet, cable television, and telephone services. Optimum was established as a brand of Cablevision, later acquired by Altice in 2016. Since then, Optimum has continued to expand its service offerings and customer base.

Optimum offers a variety of internet plans designed for fast connectivity. They provide the following internet services:
Optimum’s TV service includes a wide range of features for an improved viewing experience:
Optimum’s phone services include several features:
Phone Number(s):
New users can sign up via phone (1.866.347.4784)
631.393.0637 (Long Island)
718.860.3514 (Bronx-Brooklyn-Westchester)
973.230.6048 (New Jersey)
203.870.2583 (Connecticut)
877.491.0050 (North Carolina)
Email(s):
With this link, users can message the firm regarding billing or technical support.
https://www.optimum.net/support/contact-us