ns2.usatfus.about.us has no NS records.
NS records for this zone are defined at about.us.
NS records for this zone are defined at about.us.
Question and response
Question
dig ns2.usatfus.about.us. NS
Answer
The response has no answer records.
Authority
about.us. 600 SOA pdns1.ultradns.net. sec_grp.neustar.com. 1298801758 10800 3600 604800 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0