Poked around for a few minutes and this is nicely done. Coverage of the less common records (MTA-STS, BIMI, TLSA, CAA) in one place is the part that jumped out. Usually I bounce between two or three sites to get those.

One thing that would be handy: a shareable permalink for a given lookup result, so you can paste it into a ticket or chat instead of retyping the query.

thanks for the feedback- that would be useful- I'll look into something.