mail.rph.com has no NS records.
NS records for this zone are defined at rph.com.
NS records for this zone are defined at rph.com.
Question and response
Question
dig mail.rph.com. NS
Answer
The response has no answer records.
Authority
rph.com. 600 SOA ns03.gcd-dns.com. dns.jomax.net. 2024012200 28800 7200 604800 600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0