Several search engines let you limit your search to a particular domain. If you want quick access to numbers within a particular company, try limiting the search. But, then we searched just within those results for phone, and got only 8 results. Creative Thinking Consider the possibilities. When you don't have a name, think of what you want.
Most large organizations keep track of their employees in a database.
The more people who use the Internet to recruit, the more HR departments are wising up. You may need to purposefully misspell or abbreviate. There is no easy way. But creativity in how you look at things and imagining how someone would try to hide a phone directory and still remember what it's called can help. Be creative, you'll find.