Earlier this summer I completely reworked my DNS QuickCheck Chrome Extension. Now, the DNS is fetched and displayed within the extension popover, rather than opening a new tab to who.is.
It includes several common DNS record types to query, or the automatic “QuickCheck” option, which displays any available A, CNAME, or NS records for the (sub)domain of your current tab.
The extension is available at the Chrome Webstore.