I have been using the tplinkdns service for a dynamic hostname for years. It seemed recently this stopped working. My domain says it is still bound in the router settings but any dns lookups for my hostname return nothing. Is this service still active?

Just as a test I tried on noip and that does still appear to work so it seems like just a tplinkdns issue, but I prefer to use the tplink one since others make you checkin all the time to keep the domain active.