AFAIK, nic.ar never had a whois service... only queries via web... in fact, at one point, the output of the web query was a .gif autogenerated...

I think it's now again plain text, so you should be able to automatically query it using LWP or something along the lines (it only accepts POSTs not GETs).

-- Mariano Absatz - El Baby el (dot) baby (AT) gmail (dot) com el (punto) baby (ARROBA:@) gmail (punto) com