mail.intelcom.online has no NS records.
NS records for this zone are defined at intelcom.online.
NS records for this zone are defined at intelcom.online.
Question and response
Question
dig mail.intelcom.online. NS
Answer
The response has no answer records.
Authority
intelcom.online. 3600 SOA isp.24hc.ru. info.itcom.info. 2019122113 3600 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0