If provided, keep any documentation or reference materials from Spectrum regarding the services they offer and the codes used.
Some phones have a built-in feature to block calls. Check your phone's manual or manufacturer's website for instructions.
Spectrum landline services (Spectrum Voice) offer several ways to block unwanted calls. Unlike a smartphone, a traditional landline does not have a simple "Block Contact" button, but you can use programmed directly from your home phone.
This is the quickest way to block a telemarketer or spam number that just called you.
If you find that the 30-number limit on the Spectrum portal is not enough, you may want to invest in a physical call-blocking device. These units plug in between your wall jack and your phone base station. Many of these devices come pre-programmed with thousands of known scam numbers and allow you to block thousands more manually with a dedicated "Block" button on the device itself.