Who was the domain name you checked a while ago or a better whois!
# whois data for DOMAIN with optional NOTES
$ whowas DOMAIN [NOTES]
# list of available TLDs
$ whowas tlds
# whoise server for a TLD
$ whowas fun
# Interact with the git repository for recorded whois data
$ whowas git [GIT-COMMAND]
$ whowas myclinetsbusiness.com 'a nice alternative domain name'
...
Recorded 'TAKEN' for domain 'myclinetsbusiness.com'
All the records are stored under ~/.whois/data and maintained by git
$ whowas log
Which will essentially do
$ cd ~/.whois/data
$ ls
myclinetsbusiness.com myclinetsbusiness.com-STATUS
$ git log
Stable. Requires bash potato framework.