*.range86-185.btcentralplus.com has no CNAME records.
Question and response
Question
dig *.range86-185.btcentralplus.com. NS
Answer
The response has no answer records.
Authority
range86-185.btcentralplus.com. 10676 SOA a-ns.bt.com. hostmaster.bt.net. 2026021902 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0