This one works for me. But I don't get it. Can someone explain? This isn't browser trickery, nslookup succeeds for "ai." but not "ai".

> ai

** UnKnown can't find ai: Non-existent domain

Server: UnKnown

Address: 192.168.86.1

> www.ai

Non-authoritative answer:

Server: UnKnown

Address: 192.168.86.1

Name: www.ai

Address: 209.59.119.34

> ai.

Non-authoritative answer:

Server: UnKnown

Address: 192.168.86.1

Name: ai

Address: 209.59.119.34

>