Repetitive nuisance call. Caller asked for a job titles and when advised that would require more information, then provided a names of possible employees at the opposite end of the spectrum. This prompts for reasons for the call. Callers only indicate it is regarding "Correspondence" and then adamantly refuse to otherwise identify themselves, their company or the actual purpose of the their calls. Indicating that it is too complicated to go any further with receptionist and administrative assistants (who might have, maybe, given assistance).
...I'll just let others draw their own conclusions...

Seems like it. The woman was horrible to listen to on the line. Loud and dragging like a wet rag. No surprise the line seems to be a spam line.

This number calls my work line at least once a day. Sometimes leaves a blank message. Very annoying.