It looks like Parler transferred their domain name to Epik (as a registrar), but are not currently using them for hosting.

As recently as a few days ago, Epik explicitly stated that they have no plans to host Parler (https://mynorthwest.com/2461882/sammamish-epik-parler/). That said, since the site is behind "ddos-guard.net," it's difficult to tell who their actual host is.