It is a law office of Richard Clark. I recommend you goggle Law office of Richard Clark and read peoples post. This is a firm trying to collect of REALLY old debts. From reading the post these people are rude and annoying. I have rec'd a lot of calls from the number and I just keep hanging up on them. I understand that if you ask for a verification of debt they get real upset and hang up on you. They have no way to prove that is your debt. This is only what I have read. I have not talked to them because I prefer just to ignore the calls.
These people bothered me too...called at lunch time asking for Robert. Sounds like this Robert person made up a phone number for someone. I'll just add their number to call block.