spf.emsecure.net has no NS records.
NS records for this zone are defined at emsecure.net.
NS records for this zone are defined at emsecure.net.
Question and response
Question
dig spf.emsecure.net. NS
Answer
The response has no answer records.
Authority
emsecure.net. 180 SOA ns10.dnsmadeeasy.com. dns.dnsmadeeasy.com. 2009039519 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0