I have an issue with some internet web sites timing out and others working just fine.
I've tested ping from my router and pings to the crutchfield.com fail but pings to espn.com work.
So, my next step was to power-reset my cable modem and after that, i was able to access www.crutchfield.com.
fast forward two days later and the same issue has reoccurred.
General internet access is fine but specific websites (www.crutchfield.com, craigslist) fail with a timeout message.
I can reset my cable modem again and it'll clear the issue for now.
It's unlikely that Spectrum's DNS is unable to resolve that IP, check you browser security settings, clear cache, cookies and flush DNS may also help.