What WP Theme Is This Site Using?

Hi Guys does anyone know what this theme is? have a client that wants this type of site.

https://www.spectrumvoip.com/

It is a custom theme.

They are using wp starter theme

Hint:
Look into the theme stylesheet:

If you want to know this kind of information in the future, install the "whatruns" extension for Chrome. In this case, it would tell you that the theme itself is called spectrumvoip, which suggests that the theme is custom made, as the previous commenter said. Still, that extension will probably come in handy if you frequently find yourself needing to know the themes, fonts, advertising service, or whatever else a site is using.