PE1.DNSNODE.NET has no CNAME records.
Question and response
Question
dig PE1.DNSNODE.NET. NS
Answer
The response has no answer records.
Authority
DNSNODE.NET. 3378 SOA nna.netnod.se. noc.netnod.se. 1771459261 7200 1800 604800 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0