ns2.volcdns.com has no NS records.
NS records for this zone are defined at volcdns.com.
NS records for this zone are defined at volcdns.com.
Question and response
Question
dig ns2.volcdns.com. NS
Answer
The response has no answer records.
Authority
volcdns.com. 300 SOA ns1.volcdns.com. dnsadmin.bytedance.com. 2023112983 3600 1200 86400 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0