Hi David,
RackCorp runs our own in-house control panel that has been the backbone of our operations for several years. Via this control panel you can add / update / remove domains and control all records appropriately including TTL, TXT, etc. We also allow you to configure geo-location based responses.
You can choose to use up to 5 of our geographically separate DNS servers which all run on 5 minute update intervals.
Just drop an email to
sales@rackcorp.com with the same request and we can send you back pricing.
Regards,
Stephen