Rob,
I want memorialize for all Amateurs to see publicly - the 2 records that are mine and happen not to match the pattern "you described" (i.e. the "subdomain claim" theory):
dns-mdc.ampr.org
whatismyip.ampr.org
Lastly, I requested the format match AX.25 SSIDs (e.g. "kb3bvg-01") by CNAME - leaving the original record intact. This was always the intended design when I created those and designed my subnet.
The hostnames have Amateur use - I want to memorialize this.
- KB3VWG