ns2.singlehop.com has no NS records.
NS records for this zone are defined at singlehop.com.
NS records for this zone are defined at singlehop.com.
Question and response
Question
dig ns2.singlehop.com. NS
Answer
The response has no answer records.
Authority
singlehop.com. 86400 SOA ns1.singlehop.com. netops.singlehop.com. 2008071001 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0