According to ICANN, RDAP is now the definitive source for gTLD domain registration information (and is also available on some, though not all, ccTLDs). Currently registrars generally still offer WHOIS access, though at some point it seems likely that RDAP may completely replace this.
rdapper is a client for this written in Perl. A couple of dependencies are needed, the attached tar includes net/p5-LWP-Online net/p5-Net-ASN net/p5-Net-RDAP net/rdapper There are some other clients available; I chose to write ports for this because it's the only one I've found that's written in a language available on all OpenBSD archs... ok to import?
rdapper-plus-deps.tgz
Description: application/tar-gz