I'm not sure if it Covers IRR. But considering IRR is an extension of Whois... Arin keeps the service of "whowas" https://www.arin.net/reference/research/whowas/ I suggest you take a look there. And also, some IRRs keeps an archive folder on the FTP. ftp://ftp.radb.net/radb/dbase/archive/ ftp://rr.level3.net/pub/rr/archive.mirror-data/ Em qua., 24 de fev. de 2021 às 05:03, Lars Prehn <lprehn@mpi-inf.mpg.de> escreveu:

Does anybody have (somewhat frequent, e.g., monthly) snapshots of the various IRR databases lying around? Any snapshot since 2010 would be helpful!

Best regards,

Lars

-- Douglas Fernando Fischer Engº de Controle e Automação