Run DNS lookups against public resolvers or your own server. Batches of hostnames, record types, and resolvers all run in one go, with the raw dig output translated into plain language alongside it.
Instead of asking a public resolver — which may be serving a cached answer — this looks up the domain's real name servers and queries each one directly. It's the way to catch a stale secondary nameserver, or confirm what's actually configured at the source rather than what's currently cached along the way.