What does " !H" mean in a traceroute?

My backup server is down, and traceroutes stop at an IP before my server with a "!H" - what does that mean?
Code: 
/usr/sbin/traceroute -w 3600 65.77.221.***

14  kscymo1wce1-pos3-0.wcg.net (64.200.183.174)  73.161 ms  72.675 ms  73.965 ms
15  kscymo1wce1-hostmetro-gige.wcg.net (65.77.99.50)  77.995 ms  73.702 ms  73.185 ms
16  kscymo1wce1-hostmetro-gige.wcg.net (65.77.99.50)  3069.437 ms !H  3067.719 ms !H  3070.767 ms !H
and that's where it stops.

 

 

 

 

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