o6.ptr6293.email.signaturit.com has no NS records.
NS records for this zone are defined at signaturit.com.
NS records for this zone are defined at signaturit.com.
Question and response
Question
dig o6.ptr6293.email.signaturit.com. NS
Answer
The response has no answer records.
Authority
signaturit.com. 1800 SOA adam.ns.cloudflare.com. dns.cloudflare.com. 2399247676 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0