mail160.email.bancoguayaquil.com has no NS records.
NS records for this zone are defined at bancoguayaquil.com.
NS records for this zone are defined at bancoguayaquil.com.
Question and response
Question
dig mail160.email.bancoguayaquil.com. NS
Answer
The response has no answer records.
Authority
bancoguayaquil.com. 86400 SOA . . 851 900 600 432000 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0