mail.infogral.is has no NS records.
NS records for this zone are defined at infogral.is.
NS records for this zone are defined at infogral.is.
Question and response
Question
dig mail.infogral.is. NS
Answer
The response has no answer records.
Authority
infogral.is. 300 SOA node-1.infogral.is. zonemaster.infogral.is. 2621 120 60 2592000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0