Comodo DNS Servers down?

pings to 156.154.70.22 fail at the moment and to 156.154.71.22 only occasionally work.

Are the servers down?
I have several DNS servers in my Internet setup here so only just noticed that Comodo ones are down.

I’m having issues reaching the ‘old’ Secure DNS servers also.


Pinging 156.154.70.22 with 32 bytes of data:
Request timed out.
Reply from 156.154.70.22: bytes=32 time=27ms TTL=51
Request timed out.
Request timed out.
Request timed out.

It seems to be resolving DNS query’s though


C:\Data>nslookup www.comodo.com. 156.154.70.22
Server:  UnKnown
Address:  156.154.70.22

Non-authoritative answer:
Name:    www.comodo.com
Address:  91.199.212.176