dynamic-ip-1816124261.cable.net.co has no CNAME records.
Question and response
Question
dig dynamic-ip-1816124261.cable.net.co. NS
Answer
The response has no answer records.
Authority
cable.net.co. 264 SOA ns11.telmexla.net.co. internet.telmexla.net.co. 2025100601 1200 7200 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0