531
AOL IM / IRC
Low RiskTCP — Messaging
Port Overview
Port Number
531
Service Name
AOL IM / IRC
Transport Protocol
TCP
Category
Messaging
Security Risk
Low
Port Range
Well-Known (0-1023)
What is Port 531?
Port 531 is associated with both AOL Instant Messenger and as an alternate IRC port. AIM was discontinued in 2017.
TCP
Messaging
Security Considerations
Port 531 (AOL IM / IRC) 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.