On August 24, 2016 we got two calls to our landline from this CID number with CID name set to "AM CHILD CAN FD." Both rang only once, a sign that our robocall blocking service probably intercepted them.
Starting on August 23, 2016 we also got calls from (443) 252-8103 with the similar CID name of "AM CHILD CAN F." At first calls from that number stopped after one ring, too. Unfortunately today one rang multiple times before hanging up without leaving a message. Maybe they convinced our blocking service to let their calls through. (I did ask the blocking service to start blocking calls from that number again.)
It's a direct mail and call center calling on behalf of Comcast. I called the number back and the basic info was on a recorded line... figures, since I cancelled my Comcast service a couple of days ago.