estafeta3.mapfre.com has no CNAME records.
Question and response
Question
dig estafeta3.mapfre.com. NS
Answer
The response has no answer records.
Authority
mapfre.com. 3594 SOA esdns1.mapfre.com. dnsadmin.mapfre.com. 2026022603 3600 1200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0