To be clear, a strict implementation of your DNS means that this host appears in the MNAME field of your SOA record. Not so stealthy or hidden, despite the moni

To be clear, a strict implementation of your DNS means that this host appears in the MNAME field of your SOA record. Not so stealthy or hidden, despite the moniker. You might ask "who on earth looks at the MNAME field of SOA records", I answer "well I do". However there is no requirement that the MNAME host be willing to answer queries. There is an expectation that the host in the MNAME field accepts dynamic DNS updates, if one is using RFC2136-style dynamic DNS, although I didn't get the sense Spotify were doing so.