An ActiveX/COM component that can retrieve any DNS record. You can use this component with almost any Windows
development tool, including ASP, VB, .NET, C++, Cold Fusion, Delphi,
An ActiveX/COM component that does simple forward
and reverse lookups.
Demonstrates how to check domain name availability, create
an NsLookup utility, get MX records,
and retrieve LOC records.
Handy expressions for validating domain names
client-side in web
We have several free utilities online: