ns4.cfdns.info has no NS records.
NS records for this zone are defined at cfdns.info.
NS records for this zone are defined at cfdns.info.
Question and response
Question
dig ns4.cfdns.info. NS
Answer
The response has no answer records.
Authority
cfdns.info. 86400 SOA ns1.cfdns.info. hostmaster.mtgsy.net. 20041215 3600 1200 1209600 3600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0