Determining sockets in use

It's bothering myself and one of my users how we can determine the sockets NOT in /etc/services that are in use. ie. we've got (in house) software that many developers are running, who need their own socket.

We need to be able to avoid clashing socket numbers...

What's the damn command to list them...? Is there one...
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What OS are you using?
  Hi...if you're on Solaris, netstat should help you.  talk to you soon..Adam

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rleytonAuthor Commented:
It's HP-UX, but netstat exists there too.

Don't you love standardised Unix...!???

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