RDAP Andy Newton, Chief Engineer. Background WHOIS (Port 43) – Old, very old – Lot's of problems Under specified, no I18N, insecure, no authentication, - ppt download
Using the Diagnostic Port 43 Whois Tool
QRadar: WHOIS lookup not working
Part I - Gathering WHOIS Information
GitHub - dontbug/whois: List of whois servers for common domains that can be checked on port 43
WHOIS Related Requirements - Confluence
Whois Lookup Script using GoDaddy API
Who is WHOIS? | Weberblog.net
Who is WHOIS? | Weberblog.net
Contractual Compliance Port 43 WHOIS Access Report
Procedure for Accessing the Port 43 Whois Service
How to add more value to Whois lookup statistics - Domain Name Wire | Domain Name News
Using Whois - American Registry for Internet Numbers
Querying the RIPE Database — RIPE Network Coordination Centre