At approximately 5pm PST Sunday evening the craigslist domain name service (DNS) records maintained at one of our domain registrars were compromised. This issue has been corrected at the source, but many internet service providers (ISPs) cached the false DNS information for several hours. If you are unable to reach craigslist.org and *.craigslist.com entries (A,CNAME,SOA) from their DNS servers, please ask your network provider or tech staff to flush them from their servers.”]
Source: http://blog.craigslist.org/2014/11/24/craigslist-dns-outage/