5190
AOL Instant Messenger (AIM)
Low RiskTCP — Messaging
Port Overview
Port Number
5190
Service Name
AOL Instant Messenger (AIM)
Transport Protocol
TCP
Category
Messaging
Security Risk
Low
Port Range
Registered (1024-49151)
What is Port 5190?
Port 5190 is the port used by AOL Instant Messenger (AIM) and the OSCAR (Open System for Communication in Realtime) protocol for instant messaging. iChat on macOS also used this port for AIM-compatible communications. AIM was shut down in December 2017, but the port remains associated with the OSCAR protocol.
TCP
Messaging
Security Considerations
Port 5190 (AOL Instant Messenger (AIM)) 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.