What ports are used as source ports for Splunk Universal forwarder agent?

Let’s say we have Splunk Universal Forwarder agents installed on windows servers. Is it known what ports are being used by windows servers to send data FROM (not sent TO) to splunk deployment server? In the following example source port = 61616 is used. Can it be something like 8180? TCP windows_server_source_ip:61616 splunk_deployment_server:8089 ESTABLISHED 3232