Ask HN: Wrong numbers that know your first name

In the last few months I have been getting phone calls from random people asking for me by my first name, then after I acknowledge it's me they say a wrong last name, or company. Then shortly after hanging up I receive a telemarketing call.

Has anyone encountered this pattern before? Does it have a name? Is there a way to report it?

In my case I am fairly certain the company behind it is "electric cloud" Who I foolishly gave my information to at a conference. I assume they are contracting out to a third party to verify the numbers they received, but the whole thing seems very shady.