ns2.r4ns.com has no NS records.
NS records for this zone are defined at r4ns.com.
NS records for this zone are defined at r4ns.com.
Question and response
Question
dig ns2.r4ns.com. NS
Answer
The response has no answer records.
Authority
r4ns.com. 600 SOA ns1.r4ns.com. office.gbshouse.com. 1720708736 3600 3600 86400 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0