Looks like the domain was suspended
# whois mynetname.net | grep -i sus
> Name Server: ns1.suspended-domain.com
> Name Server: ns2.suspended-domain.com
# whois mynetname.net | grep -i date
> Updated Date: 2021-09-06T10:48:09Z
> Creation Date: 2014-04-29T08:21:38Z
> Registry Expiry Date: 2022-04-29T08:21:38Z
> Domain Status: clientUpdateProhibited
> https://icann.org/epp#clientUpdateProhibited
The domain was updated around 12 hours ago, which is when it seems to have
stopped working.
# whois mynetname.net | grep -i sus
> Name Server: ns1.suspended-domain.com
> Name Server: ns2.suspended-domain.com
# whois mynetname.net | grep -i date
> Updated Date: 2021-09-06T10:48:09Z
> Creation Date: 2014-04-29T08:21:38Z
> Registry Expiry Date: 2022-04-29T08:21:38Z
> Domain Status: clientUpdateProhibited
> https://icann.org/epp#clientUpdateProhibited
The domain was updated around 12 hours ago, which is when it seems to have
stopped working.