Bash: Don't wait for command to exit

I asked this question in an earlier post but it was in the wrong section, my post was...
How would I script the following commands below?
WAM$ nc 127.0.0.1 4271
STREAM #KeyboardInput
PORT 2043 #Result of typing STREAM , would like to PORT="2043" as variable
^C #Exit KeyBoardInput
WAM$
In between these two posts, I came up with a partial solution such as
PORT=`echo 'STREAM' | nc 127.0.0.1 4271 | awk '{print $2}'`
but this command never exits so...
How do I exit this comand once I have the PORT variable set?

Do you have a process listening to port 4271 on your system?
You might need to arrange for nc to be interrupted after some short time. Maybe
(echo STREAM | nc 127.0.0.1 4271 & sleep 10 && kill %1) | awk...

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Message was edited by: Scott\'y

Bash: Don't wait for command to exit

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