GitHub - dontbug/whois: List of whois servers for common domains that can be checked on port 43
Using the Diagnostic Port 43 Whois Tool
APNIC on Twitter: "What does Port 43 WHOIS protocol have to do with an 8 track tape? Answers here https://t.co/h0bgJIEwpM https://t.co/Yrh716I2bt" / Twitter
Contractual Compliance Port 43 WHOIS Access Report
Making Use of Web Based (http, port 80) Whois in Domain Punch Pro, Watch My Domains, etc.
IRT.Advisory_ Clarifications to the Registry and Registrar Requirements for WHOIS (port 43) and Web-Based Directory Services.doc
ORG.ZA port 43 WHOIS service interruption - May 3 - Anno Internet