iteach.servetask.com has no NS records.
NS records for this zone are defined at servetask.com.
NS records for this zone are defined at servetask.com.
Question and response
Question
dig iteach.servetask.com. NS
Answer
The response has no answer records.
Authority
servetask.com. 600 SOA ns61.domaincontrol.com. dns.jomax.net. 2026011100 28800 7200 604800 600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0