webmail.constructor.okhosting.com has no NS records.
NS records for this zone are defined at okhosting.com.
NS records for this zone are defined at okhosting.com.
Question and response
Question
dig webmail.constructor.okhosting.com. NS
Answer
The response has no answer records.
Authority
okhosting.com. 60 SOA okhosting.com. soporte\@okhosting.com.okhosting.com. 0 60 60 60 60
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0