@ cl58 I think you misunderstand or don't understand DmC. He wants to: - at domain registrar set the authoritative nameservers as: ns1.heliohost.org, (ns2.heliohost.org)?, nsX.some_dns_service.com, (nsY.some_other_dns_service.com)? - on ALL authoritative nameservers, including heliohost nameservers and that other DNS service nameservers set identical records: A, CNAME, MX, etc. and NS, of course, too. @ DmC I don't know if (and how) you can add NS records on HelioHost nameservers, I'll let someone else answer, but even if you won't be able to add such NS records in here it still may work for you. This won't be good if records won't be consistent on root nameservers and all the authoritative nameservers used by you, but it still should work. Alternatively you can use the other one as primary and HelioHost nameservers as secondaries, so the primary would have the right records, consistent with these on root nameservers (set at registrar).