Try the new IANA WHOIS server

Infrastructure Hacking: WHOIS Protocol » Hacking Lethani

What Is WHOIS and How Does It Work? - IPXO

Deep Whois on the App Store

Domain Lookup 🔍 - HackMD

What is the WHOIS Service?

GitHub - jophy/iana_tld_list: A python script for fetching IANA Tldlist and parsing NIC website & Whois server.

Using Whois - American Registry for Internet Numbers

Searching Whois Using a CLI - American Registry for Internet Numbers

MW Whois - WHMCS Marketplace

Domain Lookup 🔍 - HackMD