Finding novel target phone numbers

Hi all – first time post from a long time lurker.

I’ve been interested in scambaiting, (particularly in the realm of tech support) but I’ve had trouble finding good phone numbers. Every once in a while I’ll find a good one, but this is separated by multiple days or even weeks of inactivity. I’ve had a look at the various guides on offer here, but it would appear that the methods of obtaining phone numbers are either defunct or woefully ineffective. Is there something obvious that I’m missing, and if so, could anyone provide a pointer to those things?

Perhaps I am missing something obvious – I do apologize if this post is below the standards of this forum. Thanks.