So I dismissed Piper to Sanctuary Hill and been searching high and low for her. Also looked around in Diamond City including her house but can't seem to find her.

Anyone know her ID so I can force spawn her on me? Looked it up on wiki but no ones posted her ID yet. If someone could check for me that'd be amazing!

I had the exact same problem; just added the ID to the wiki myself.

Her Ref ID is 00002f1f

Awesome! Thanks a bunch!