:43
(TCP)
Low Risk
WHOIS
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TCP — Other
Port Overview
Port Number
43
Service Name
WHOIS
Transport Protocol
TCP
Category
Other
Security Risk
Low
Port Range
Well-Known (0-1023)
What is Port 43?
WHOIS protocol. Queries domain name registration databases to retrieve information about domain ownership, registration dates, and name servers.
TCP
Other
Commonly Used
Security Considerations
Port 43 (WHOIS) is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose.
Recommendation: Standard security practices apply. Keep software updated and monitor access.