- DNSReport.com - Requires a membership if you use this more than once.
- Robtex.com - I added both the root domain (abc.com) and the www 'A' record (www.abc.com) as they provide different information.
You can download the latest version of the PassiveRecon Firefox extension here:
- passiverecon-0.3-fx.xpi - [Thanks to Trevor over @ Stratum Security]