I'm using Domaintools.com whois api to get the whois info about domains. But they don't have data for country level domains like .us/.au etc.
Is there any place I get the whois info using some api for many country level domains?
http://www.ionfish.org/whois/ (An example tool) uses the following method: http://fixee.org/paste/0rj1oj0/
The script comes from here: http://www.phpwhois.org
Have a look RoboWhois. We support all TLDs with a public WHOIS service, including .US, .AU, and .UK.
Disclaimer: I'm the author of the service.