Who called from 9138291215

ETC Institute is a market research firm.

I am in a do not call list . Please don't call me again.

Thanks,

Called me on Saturday... 2:34 PM 01/03/2009
I'm on 'no call' list too.  This isn't the first call I have rec'd from this number.

Received a call from this number today also - And we are on the no call list as well.

said he was calling on behalf of MSD (Metropolitan Sewer District).  I asked him if he knew the service address or my name to which he said no to both.  That tends to raise a few flags as does calling at 5:42pm on a Saturday.  Is this thing legit?  
He ultimately hung up.