Almost certainly GCP
$ dig NS withpersona.com.
withpersona.com. 21600 IN NS ns-cloud-c2.googledomains.com.
$ dig withpersona-sandbox.com.
withpersona-sandbox.com. 271 IN A 34.110.230.244
$ whois 34.110.230.244
NetRange: 34.64.0.0 - 34.127.255.255
CIDR: 34.64.0.0/10
NetName: GOOGL-2