ns1.tel-ott.com has no CNAME records.
Question and response
Question
dig ns1.tel-ott.com. NS
Answer
The response has no answer records.
Authority
tel-ott.com. 900 SOA pub1-master1-iblox-wlfdle.mgmt.net.rogers.com. customer.dns.team.rci.rogers.com. 2016091503 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0