Who called from 2532389610

Man claimed to be GCI Research and asked for my boyfriend.  Wouldn't tell me why he was calling so I hung up.

They called asking for my husband, wouldn't say why, wouldn't ID himself. Husband and I have different last names and I have an unlisted cell number. I'd love to know how they got his name and my phone number.

I keep getting calls from this number on my cell phone - since i don't know who it is, i don't answer it.
i've called the number back, but nothing happens

Two calls over two days on my home phone from this number. I didn't answer and they haven't left a message.