ipam2.nnn.upenn.edu has no CNAME records.
Question and response
Question
dig ipam2.nnn.upenn.edu. NS
Answer
The response has no answer records.
Authority
upenn.edu. 600 SOA ipam1.nnn.upenn.edu. hostmaster.upenn.edu. 2002380657 10800 3600 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0