DomainHostingView is a simple tool which can tell you just about everything you need to know about a domain: just type a domain name of interest in the box, click Go and read the results.
There's basic WHOIS information, for instance, including the name of the person who registered the domain name, when it was created, when it expires and so on.
You'll get IP addresses for the web and mail server.
The DNS Records table includes details for every DNS record type the program can uncover (NS, MX, A, SOA, PTR).
You'll get the raw reports for all the WHOIS and DNS queries that DomainHostingView has generated.
And as usual with NirSoft tools, the program is portable and incredibly compact, with the entire installation (including Help file and readme.txt) taking a mere 123KB.
Version 1.64 adds support for .im domains.