DNS timeouts on connect to mountainmotorsports.com

Consistently failing to resolve this address.  Here is the tracert.  

C:\Users\rla16>tracert mountainmotorsports.com

Tracing route to mountainmotorsports.com [157.230.74.183]
over a maximum of 30 hops:

  1     2 ms     2 ms     2 ms  192.168.86.1
  2    13 ms    11 ms    11 ms  96.120.4.29
  3    10 ms    11 ms    11 ms  po-253-1203-rur201.k2gwinnett.ga.atlanta.comcast.net [96.110.70.245]
  4    17 ms    13 ms    12 ms  be-311-ar-in06.b0atlanta.ga.atlanta.comcast.net [162.151.154.1]
  5    13 ms    15 ms    12 ms  be-1206-ar-sp02.b0atlanta.ga.atlanta.comcast.net [96.108.116.209]
  6    18 ms    14 ms    13 ms  be-2202-ar-ex02.b0atlanta.ga.atlanta.comcast.net [96.108.116.218]
  7     *       13 ms    13 ms  ae9.edge4.atl2.sp.lumen.tech [4.68.38.113]
  8     *        *        *     Request timed out.
  9    71 ms    72 ms    71 ms  4.7.18.10
 10     *        *        *     Request timed out.
 11     *        *        *     Request timed out.
 12     *     ^C
C:\Users\rla16>

There appears to be no way to directly contact Xfinity support for issues like this.