o61.em.spotify.com has no NS records.
NS records for this zone are defined at spotify.com.
NS records for this zone are defined at spotify.com.
Question and response
Question
dig o61.em.spotify.com. NS
Answer
The response has no answer records.
Authority
spotify.com. 3600 SOA dns1.p07.nsone.net. hostmaster.nsone.net. 1655911284 43200 7200 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0