ns2.firstdata.com has no CNAME records.
Question and response
Question
dig ns2.firstdata.com. NS
Answer
The response has no answer records.
Authority
firstdata.com. 246 SOA dns2.p07.nsone.net. domainadmin.firstdata.com. 590216280 1200 180 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0