mailserv1.dobsontelco.net has no NS records.
NS records for this zone are defined at dobsontelco.net.
NS records for this zone are defined at dobsontelco.net.
Question and response
Question
dig mailserv1.dobsontelco.net. NS
Answer
The response has no answer records.
Authority
dobsontelco.net. 180 SOA ns11.constellix.com. dns.constellix.com. 2015010102 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0