I would like to know if it is possible to detect creation of new sub-domains for a certain domain?
let's say there is a domain name called abc.com
I would like to know if a new sub-domain called 123.abc.com is created.
There might be 100s of new sub-domains created, but I would like to be notified each time a new sub-domain is created.
note: we don't own or control the domain.