Whois or nslookup.. for domain availability?

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Special Forums IP Networking Whois or nslookup.. for domain availability?
# 1  
Old 10-29-2013
Signal domain availability, requent checking?

Hi, i want to make linux bash script which will periodically check for certain domain availability, i mean like every 100miliseconds.

I want to ask which command i need to use, so the result is not cached and i dont cause any inappropriate overload?

i see:
whois domainname.com (when No entries found., domain is available)
nslookup -type=ns domainname.com (when cant find nameservers, domain is expired or available)

So my questions what kind of command do you please suggest?

Does these whois providers have any limits above which they ban your IP?

Last edited by postcd; 10-29-2013 at 07:03 AM..
# 2  
Old 10-30-2013
Yes providers of public whois data usually set daily query limits per Ip4 address unless you have a contract with them. Usually less than 100 queries a day.
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