spf.nova.is has no NS records.
NS records for this zone are defined at nova.is.
NS records for this zone are defined at nova.is.
Question and response
Question
dig spf.nova.is. NS
Answer
The response has no answer records.
Authority
nova.is. 1800 SOA patrick.ns.cloudflare.com. dns.cloudflare.com. 2396816636 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0