It appears that Andrew C Aitchison via mailop <and...@aitchison.me.uk> said:
>A more sophistication version of
>       postmaster@(whois a.b.c.d | grep -i techemail)
>but with a cleverer grep to support current whois server variants
>and redirection to a "better" whois server ?

That's what RDAP is.  Works great for IP addresses, not so great for domain 
names.

R's,
John
-- 
Regards,
John Levine, jo...@taugh.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly
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