https://forum.sinusbot.com/threads/read-me-before-you-post.342/
The default port it connects to for servers is 9987. Any other ports are either manually set or come from a SRV record set up for a domain. It makes no sense how it "randomly" changes ports.
2016-10-31T19:43:27-05:00 Starting instance ts3server://myurl.co?port=11010&nickname=Test&password=&channel=&channelpassword=
2016-10-31T19:40:11-05:00 TSClient quit.
2016-10-31T19:40:11-05:00 Fail from voice reader: EOF
2016-10-31T19:40:11-05:00 Fail from data reader: EOF
2016-10-31T19:40:10-05:00 KILL [admin] OK
2016-10-31T19:40:09-05:00 New connection status 0; Error 0
2016-10-31T19:40:09-05:00 The bot could not connect. This might have several reasons: the server doesn't exist at that address, the server password is wrong, the default channel doesn't exist, the bot has been banned, the server is an illegal installation or the password is wrong or the security level of your identity is too low.
2016-10-31T19:40:09-05:00 New connection status 1; Error 0
2016-10-31T19:40:04-05:00 Starting instance ts3server://myurl.co?port=11168&nickname=Test&password=&channel=&channelpassword=
2016-10-31T19:34:20-05:00 TSClient quit.
2016-10-31T19:34:20-05:00 Fail from voice reader: EOF
2016-10-31T19:34:20-05:00 Fail from data reader: EOF
2016-10-31T19:34:19-05:00 New connection status 0; Error 1797
2016-10-31T19:34:19-05:00 The bot could not connect. This might have several reasons: the server doesn't exist at that address, the server password is wrong, the default channel doesn't exist, the bot has been banned, the server is an illegal installation or the password is wrong or the security level of your identity is too low.
2016-10-31T19:34:14-05:00 New connection status 1; Error 0
2016-10-31T19:34:09-05:00 Starting instance ts3server://myurl.co?port=11720&nickname=Test&password=&channel=&channelpassword=
2016-10-31T19:34:06-05:00 TSClient quit.
2016-10-31T19:34:06-05:00 Fail from data reader: EOF
2016-10-31T19:34:06-05:00 Fail from voice reader: EOF
2016-10-31T19:34:06-05:00 KILL [admin] OK
2016-10-31T19:34:04-05:00 Already online.
2016-10-31T19:34:01-05:00 Starting instance myurl.co?port=11817&Test&password=&channel=&channelpassword=
2016-10-31T19:33:41-05:00 Initialization complete
2016-10-31T19:33:41-05:00 Loading script aloneMode
2016-10-31T19:33:41-05:00 Loading script Youtube Search
2016-10-31T19:33:41-05:00 Loading script welcometext
2016-10-31T19:33:41-05:00 Loading script covatar
It's a fake url, but you get the point.