I want to make an input where you write a domain, click a button, and then know if a domain is ocupied or unregistered.
Is any API out there that can help me?
A:
You can do this by doing a DNS lookup and fetch the not found result. Example in nslookup.
nslookup www.bullocksarefree.com
Server: 8.8.8.8
Address: 8.8.8.8#53
** server can't find www.bullocksarefree.com: NXDOMAIN
So, if your programming language supports networking, you can find it inside the DNS implementation.
Shyam
2010-06-08 20:44:59
No, bad algorithm. In several TLD, (.COM, .FR, etc), a domain can be registered and not published in the DNS ("on hold" in .COM, "blocked" or "reserved" in .FR, etc).
bortzmeyer
2010-06-14 08:00:58
+2
A:
You'll want to work with the WHOIS protocol for domain lookups. With it you'll be able to find out if a domain is taken or not. There's a WHOIS web service that can help you get started.
BoltClock
2010-06-08 20:46:19