mail2.worria.com has no NS records.
NS records for this zone are defined at worria.com.
NS records for this zone are defined at worria.com.
Question and response
Question
dig mail2.worria.com. NS
Answer
The response has no answer records.
Authority
worria.com. 1800 SOA elinore.ns.cloudflare.com. dns.cloudflare.com. 2396680360 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0