DuckDuckGo IP Address Times Out

One of the resolvable IPs (50.18.200.106) from DuckDuckGo times out on my connection - I cannot reach it from any device wired or wireless. I've tried several different DNS providers, however this appears to be a routing issue. This has been happening off and on for the past several months, and I've finally gotten annoyed enough to take the time to post it here.

Here's the traceroute of the problematic IP:

Tracing route to duckduckgo.com [50.18.200.106]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  Linksys07148.hsd1.ca.comcast.net [10.0.1.1]
  2     9 ms     7 ms     9 ms  96.120.88.53
  3     7 ms     8 ms     9 ms  be-10001-rur01.santaclara.ca.sfba.comcast.net [68.85.191.161]
  4     9 ms     8 ms     8 ms  be-232-rar01.santaclara.ca.sfba.comcast.net [162.151.78.253]
  5     9 ms    12 ms    10 ms  be-3651-cr02.sunnyvale.ca.ibone.comcast.net [68.86.91.73]
  6    10 ms     9 ms     8 ms  be-11083-pe02.529bryant.ca.ibone.comcast.net [68.86.84.14]
  7     8 ms    10 ms    10 ms  as16509-1-c.529bryant.ca.ibone.comcast.net [50.242.148.82]
  8     *        *        *     Request timed out.
  9     *        *        *     Request timed out.
 10     *        *        *     Request timed out.
 11     *        *        *     Request timed out.
 12     *        *        *     Request timed out.
 13     *        *        *     Request timed out.
 14     *        *        *     Request timed out.
 15     *        *        *     Request timed out.
 16     *        *        *     Request timed out.
 17     *        *        *     Request timed out.
 18     *        *        *     Request timed out.
 19     *        *        *     Request timed out.
 20     *        *        *     Request timed out.
 21     *        *        *     Request timed out.
 22     *        *        *     Request timed out.
 23     *        *        *     Request timed out.
 24     *        *        *     Request timed out.
 25     *        *        *     Request timed out.
 26     *        *        *     Request timed out.
 27     *        *        *     Request timed out.
 28     *        *        *     Request timed out.
 29     *        *        *     Request timed out.
 30     *        *        *     Request timed out.

Trace complete.

Here's a traceroute of one of the DuckDuckGo IPs that does connect (54.241.2.421):

Tracing route to duckduckgo.com [54.241.2.241]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  Linksys07148.hsd1.ca.comcast.net [10.0.1.1]
  2     9 ms     7 ms     8 ms  96.120.88.53
  3     9 ms     8 ms     8 ms  be-10001-rur01.santaclara.ca.sfba.comcast.net [68.85.191.161]
  4    11 ms     7 ms     9 ms  be-232-rar01.santaclara.ca.sfba.comcast.net [162.151.78.253]
  5    10 ms    10 ms    10 ms  be-3651-cr02.sunnyvale.ca.ibone.comcast.net [68.86.91.73]
  6    13 ms     9 ms     8 ms  be-11083-pe02.529bryant.ca.ibone.comcast.net [68.86.84.14]
  7     9 ms     9 ms     9 ms  as16509-2-c.529bryant.ca.ibone.comcast.net [66.208.229.30]
  8     *        *        *     Request timed out.
  9     *        *        *     Request timed out.
 10     *        *        *     Request timed out.
 11     *        *        *     Request timed out.
 12     *        *        *     Request timed out.
 13     *        *        *     Request timed out.
 14     *        *        *     Request timed out.
 15     *        *        *     Request timed out.
 16     *        *        *     Request timed out.
 17     *        *        *     Request timed out.
 18     *        *        *     Request timed out.
 19     *        *        *     Request timed out.
 20     *        *        *     Request timed out.
 21     *        *        *     Request timed out.
 22     *        *        *     Request timed out.
 23     *        *        *     Request timed out.
 24     *        *        *     Request timed out.
 25     *        *        *     Request timed out.
 26     *        *        *     Request timed out.
 27     *        *        *     Request timed out.
 28     *        *        *     Request timed out.
 29     *        *        *     Request timed out.
 30     *        *        *     Request timed out.

Trace complete.