mail.1.fm has no NS records.
NS records for this zone are defined at 1.fm.
NS records for this zone are defined at 1.fm.
Question and response
Question
dig mail.1.fm. NS
Answer
The response has no answer records.
Authority
1.fm. 300 SOA dns1.easydns.com. zone.easydns.com. 1770410090 3600 600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0