ttvideo.videostream4u.com has no NS records.
NS records for this zone are defined at videostream4u.com.
NS records for this zone are defined at videostream4u.com.
Question and response
Question
dig ttvideo.videostream4u.com. NS
Answer
The response has no answer records.
Authority
videostream4u.com. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1772035775 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0