Last year we added support for dynamically setting any A record DNS entry – included as standard in all domain and DNS hosting packages.
You must enable for facility (via the control panel) for each A record that you wish to set dynamically and then you can configure most routers to make the appropriate update requests. Or you can do it manually with curl:
curl "https://www.allsecuredomains.com/api/dns/setDynamic?domain=example.com&hostname=test&key=a1b4002e-04f4-4c84-86d7-00ef66781d93&myip=127.0.0.1"
You can find full details of the dynamic DNS feature on our support pages.