hal.ns.black.host has no CNAME records.
Question and response
Question
dig hal.ns.black.host. NS
Answer
The response has no answer records.
Authority
black.host. 1703 SOA dave.ns.black.host. dns.cloudflare.com. 2396487332 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0