While searching for company phone numbers, I do a very simple boolean.

“Company name, LLC” ~phone

The quotes used in Google indicate you want to search for exactly what is within them. The tilde (~) indicates you want to search for synonyms of the word immediately following.

Example: “GramercyOne, LLC” ~phone

This is only part of the way down on the first page of search results with that simple boolean. I have found a phone number to begin with. Also, we can see that the search engine was picking up on synonyms of “phone,” such as “mobile” and “contact.”