dns1.cotas.com.bo has no NS records.
NS records for this zone are defined at cotas.com.bo.
NS records for this zone are defined at cotas.com.bo.
Question and response
Question
dig dns1.cotas.com.bo. NS
Answer
The response has no answer records.
Authority
cotas.com.bo. 86400 SOA dns2.cotas.com.bo. postmaster.com.bo. 1989020550 10800 3600 3600000 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0