ns0.ifxnetworks.com has no NS records.
NS records for this zone are defined at ifxnetworks.com.
NS records for this zone are defined at ifxnetworks.com.
Question and response
Question
dig ns0.ifxnetworks.com. NS
Answer
The response has no answer records.
Authority
ifxnetworks.com. 180 SOA ns11.constellix.com. dns.constellix.com. 2015010772 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0