Who called from 2027955696

I received a stressful recording from this number. Stating that they are from the I.R.S. didn't give any  names from their end or any name they were looking for.  The only thing they wanted was for me to call them back.  Is this number legal?

I got a call from this number too and they left a message.  They said they were a federal agent needing me to call them back.

They left a few weird, static messages before leaving one that said that they were a federal agent and needed me to call them back... It's really freaking me out.

Completely bogus call