SERVERHOUSE.ear3.London2.Level3.net has no CNAME records.
Question and response
Question
dig SERVERHOUSE.ear3.London2.Level3.net. NS
Answer
The response has no answer records.
Authority
London2.Level3.net. 2878 SOA ns2.Level3.net. dns.level3.net. 2026021802 7200 600 2592000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0