Huffington Post 
Feb 19, 2011
Libya first began shutting off  social networking sites like Facebook and Twitter and the news website of Al Jazeera before taking down entire Internet providers. Internet authority Renesysconfirmed  late Friday “Libya is off the Internet.”
When Egypt’s Internet went down  the morning of Jan. 28, Renesys called it an unprecedented move at the time in the history of the Internet.
“We wondered whether anyone would repeat Egypt’s strategy. Tonight, it appears that we have our answer,” Internet authority Renesys wrote in a blog post  on Libya’s Internet outage.
Here’s more from Renesys:
Renesys confirms that the 13 globally routed Libyan network prefixes were withdrawn at 23:18 GMT (Friday night, just after midnight Saturday local time), and Libya is off the Internet.