Who called from 9704584056

Got a call fron this number asking for my husband when I asked if I could take a message he said "no that's fine" and hung up!  The call showed up as Sterling, CO

Received a phone call at 9:02 pm ... I couldn't get to it in time.  When I called back, voicemail answered the call with generic message ...STRANGE

Have gotten multiple calls from this number asking for myself at my parents residence. They have offered to take messages multiple times and the  man on the other end just says "no thats fine" and hangs up.

What did they ask for?

Or should I say, did they say why they were calling?