Analysis of Egyptian Internet outage 27th January - 2nd February 2011
In January 2011, Egypt was completely disconnected from the Internet. There is some background to this incident on RIPE Labs here, a summary on Wikipedia and additional visualisations from the RIPE NCC REX tool.
The RIPE NCC provided a real-time monitor to observe reachability of Egyptian prefixes throughout the disconnection.
This page also archives the withdrawal and subsequent re-announcement of the prefixes of the Egyptian Internet on the 27th of January and the 2nd of February.