_netblocks.solido.net has no CNAME records.
Question and response
Question
dig _netblocks.solido.net. NS
Answer
The response has no answer records.
Authority
solido.net. 744 SOA ns001.dnspilot.com. hostmaster.dnspilot.com. 2025010704 14400 7200 604800 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0