Who is behind a .co.uk domain name?

Didn't this used to be easy?

[Mark_A]

As title, someone is using a .co.uk domain for email, but there isn't a website - I would like to find out who is behind it / who owns the domain?
I am sure this used to be as simple as a whois search but this morning I can't seem to find results.

[engine]

Yes, it's obfuscated because of GDPR.

Try sending an email to info, or admin@

[Mark_A]

Hmm yes I suppose that makes sense.
I just wanted to do a quick background check, have found another way now.
Thanks engine.

[piatkow]

Just wondering if Mark_A was trying to check up on me?

I would add that if it just being used as a personal domain for emails then it is quite possible that it won't have an admin@ address routed to a mailbox. There are plenty of "civilians" who have acquired family name domains for email use.

[lucy24]

I wouldn't have thought of admin@ but if I ever try postmaster@ and it doesn't get through, it makes me profoundly suspicious of the site.

:: detour to look up ::

Horse’s Mouth [tools.ietf.org] says, in part (sec 4.5.1),

Any system that includes an SMTP server supporting mail relaying or
delivery MUST support the reserved mailbox "postmaster" as a case-
insensitive local name. This postmaster address is not strictly
necessary if the server always returns 554 on connection opening (as
described in Section 3.1). The requirement to accept mail for
postmaster implies that RCPT commands that specify a mailbox for
postmaster at any of the domains for which the SMTP server provides
mail service, as well as the special case of "RCPT TO:<Postmaster>"
(with no domain specification), MUST be supported.

SMTP systems are expected to make every reasonable effort to accept
mail directed to Postmaster from any other system on the Internet.

[Dimitri]

A reverse DNS from the IP can sometimes reveal interesting information :)

(however, with cloudflare, and the shortage of IP, this is less true than in the past)