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digitalpbk
yup

Server: google-public-dns-a.google.com Address: 8.8.8.8

* google-public-dns-a.google.com can't find stackoverflow.com: Server failed

shitlord
Same for me, I'm on the east coast if that makes a difference
kbaker
No, it won't, both their primary and secondary DNS are resolving it with SERVFAIL.

Pretty bad...

mflindell
Looks like I'm finished work for the day! Time to go home
mossplix
you can always use the google cache
sairamkunala
superuser.com - DOWN

stackoverflow.com - DOWN

serverfault.com - UP

cdn.sstatic.net - DOWN

Purely a DNS issue

  dig stackoverflow.com @ns3.serverfault.com # (authoritative DNS)
  
  ; <<>> DiG 9.8.3-P1 <<>> stackoverflow.com 
  @ns3.serverfault.com
  
  ;; QUESTION SECTION:
  ;stackoverflow.com.		IN	A
  
  ;; Query time: 400 msec
  ;; SERVER: 69.59.196.217#53(69.59.196.217)
kbaker
Yeah, seems like ns3.serverfault.com was SERVFAILing its own record, so now that it has timed out all serverfault domains are down.
rsingla
Looks like their stack has finally...overflowed.
DanBC
http://meta.stackoverflow.com/questions/164444/dns-server-fa...

> It appears the nameservers for Stack Exchange are returning SERVFAIL for all queries, meaning most users are unable to access any Stack Exchange site, or will shortly lose access once their local DNS caches expire.

KyleBrandt
Answer as to the direct cause (posted to that question):

"We recently relocated our NY datacenter, and therefore all the IPs in NY changed.

We didn't update to the new IP for the master DNS server (in both the named.conf and the zone files), and therefore all of our slaves hit our expiry time (one week). This is fixed now, so things should start coming back up."

danielhughes
When Stack Overflow went down tonight my productivity dropped precipitously. It reminds me of how grateful I am of the team at Stack Exchange. They built one hell of a resource.
farnsworth
This evening realized how dependent I am on SO. Trying to figure out how to dynamically set parameters for a CSS animation (turns out it's harder than it sounds) and the only useful answers I can find are on SO. Also very glad to have Google's cached versions.