ns2.onlydomains.com has no NS records.
NS records for this zone are defined at onlydomains.com.
NS records for this zone are defined at onlydomains.com.
Question and response
Question
dig ns2.onlydomains.com. NS
Answer
The response has no answer records.
Authority
onlydomains.com. 300 SOA ns1.onlydomains.com. root.onlydomains.com. 2015080402 28800 7200 604800 300
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0