Hello!
The current Phoenix servers are in a Cogent datacenter in Phoenix, see also our previous message. Any provider may offer services inside totally owned or partially owned datacenters, or from not owned at all datacenters where entire racks are rented or similar agreements are finalized.
The new Phoenix servers are in Phoenix, shipped at the beginning of October and arrived on site a few days ago, they are already connected and working, we are testing them and we are confident we will announce them before the end of October. There are dozens of datacenters in Phoenix, around 75 or so, including big ones like Google, Apple, NTT, Cogent and more.
Kind regards