What server message did you receive?

Hello,

I got notifications that 4 of our sites went down for around 2 minutes earlier today:
http://osakahoteldirectory.info
http://shanghaihoteldirectory.com/
http://kualalumpurhoteldirectory.com/
http://viennahoteldirectory.info/

Would you be able to tell me what the server codes were? It is my understanding that anything other than a 200-OK would trigger an alert?

The origin hosting provider for these 4 sites confirm they were fully operational. They are also orange clouded on CloudFlare.

Thanks,
Mike