there'll be no identifying this person unless they do it themselves. Below is what I was able to find out about the person...

Server: ns1.kloth.net
Address: 213.133.98.149#53

Non-authoritative answer:
133.181.156.63.in-addr.arpa name = 0-1pool181-133.nas2.las-vegas1.nv.us.da.qwest.net.

Authoritative answers can be found from:
156.63.in-addr.arpa nameserver = dca-ans-01.inet.qwest.net.
156.63.in-addr.arpa nameserver = svl-ans-01.inet.qwest.net.
dca-ans-01.inet.qwest.net internet address = 205.171.9.242
svl-ans-01.inet.qwest.net internet address = 205.171.14.195

What this means is that the number is from an IP pool that is randomly assigned to dial-up users. Every time a dial-up user logs-on, they get a new IP address, so without the ISP's logs, you can't identify this person, and there's no way an ISP would divulge such information without a warrant.

So all we can know for sure about this person is they live in Las Vegas (no surprise there). That should narrow it down to a few hundred of us