webmail2.cotas.com has no NS records.
NS records for this zone are defined at cotas.com.
NS records for this zone are defined at cotas.com.
Question and response
Question
dig webmail2.cotas.com. NS
Answer
The response has no answer records.
Authority
cotas.com. 3600 SOA calleja.cotas.com. gmorenoc.cotas.com. 2018031053 1800 900 1296000 3600
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0