bc1qr2a.bf02.hubspotfree.net has no NS records.
NS records for this zone are defined at hubspotfree.net.
NS records for this zone are defined at hubspotfree.net.
Question and response
Question
dig bc1qr2a.bf02.hubspotfree.net. NS
Answer
The response has no answer records.
Authority
hubspotfree.net. 1800 SOA jerry.ns.cloudflare.com. dns.cloudflare.com. 2399959384 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0