Looking for anyone from Cox Communications

[August Yang via NANOG <nanog () nanog org>]

Some Cox customers reported they were not able to reach one of our IPv6 
prefixes, including more specifics announced by different ASNs. I 
suspect the whole range is blackholed or something.

```
mtr -r -c1 -w 2a12:dd44::1

Start: 2022-08-25T18:09:50-0700
HOST: ronsor-lg-arch                          Loss%   Snt   Last   Avg  
Best  Wrst StDev
  1.|-- 2600:8800:3b80:3d70:424c:77ff:fe74:cf7a  0.0%     1   30.8  30.8 
 30.8  30.8   0.0
  2.|-- 2600:8800:3bff:ffff::1111                0.0%     1   97.1  97.1 
 97.1  97.1   0.0
  3.|-- 2001:578:801:fffc:600::2c                0.0%     1   15.3  15.3 
 15.3  15.3   0.0
  4.|-- 2001:578:900:4::6                        0.0%     1   13.8  13.8 
 13.8  13.8   0.0
  5.|-- 2001:578:1:0:172:17:248:216              0.0%     1   73.5  73.5 
 73.5  73.5   0.0
  6.|-- ???                                     100.0     1    0.0   0.0 
  0.0   0.0   0.0
```
2a12:dd47:805e::1 originated from AS211233 dropped at the same router 
2001:578:1:0:172:17:248:216.

Feel free to contact me off list.

Thanks
August Yang