Doug Madory



Bio: Doug Madory is a Director of Internet Analysis at Dyn where he works on Internet infrastructure analysis projects. Doug has a special interest in mapping the logical Internet to the physical lines that connect it together, with a special interest on submarine cables.

Author Posts:


Internet for the Next 3 Billion

January 13, 2015 • Last month, I traveled to Doha, Qatar to participate in the ITU’s...


On-going BGP Hijack Targets Palestinian ISP

January 9, 2015 •          Update (12:57 UTC, 10-Jan): We received the...


What’s Next for Cuba?

December 18, 2014 • Nearly two years ago, we broke the story about the activation of the first submarine cable...


Use Protection if Peering Promiscuously

November 12, 2014 • Last week, I wrote a blog post discussing the dangers of BGP routing leaks between peers,...


Chinese Routing Errors Redirect Russian Traffic

November 6, 2014 • In recent weeks, Russian President Vladimir Putin announced a plan to enact measures to...


Why Far-Flung Parts of the Internet Broke Today

September 18, 2014 • VolumeDrive is a Pennsylvania-based hosting company that uses Cogent...


Sprint, Windstream: Latest ISPs to hijack foreign networks

September 12, 2014 • Last year my colleague Jim Cowie broke a story about routing hijacks that resulted in Internet...


No turning back: Russia activates Crimean cable

July 31, 2014 • The Crimean peninsula depends critically on the Ukrainian mainland for...


Kurdish ISPs enable growth of Iraqi Internet

July 22, 2014 • The recent violence in Iraq and the government’s actions to...


Amid raging violence, Iraq orders Internet shutdowns

June 13, 2014 • Update (10:00ET, 14-Jun-2014): See below for a copy of Friday’s...


Beware the Ides of March: Subsea Cable Cut Trend Continues

March 31, 2014 • Earlier this month, the International Cable Protection Committee, a submarine...


Telenor activates historic link in Myanmar

March 25, 2014 • Photo by Jean-Marie Hullot on Flickr | CC Three years after the...


Protests Lead to Outage in Thailand

December 2, 2013 • photo by Suriya Thonawanik Tensions in Thailand are high as a week of anti-government...


Submarine Cables Add Resilience But Paths Still Matter

October 16, 2013 • Last month, I had the honor of opening the second day of the Submarine Networks...


Restoration of Internet in Aleppo, Syria

October 9, 2013 • Update #2 (11:40 AM ET, 11 Oct 2013) Aleppo returns Update (12:38 PM...


Internet Blackout in Sudan

September 25, 2013 • Update (8:01 ET, 26 Sep): A few hours ago, we observed a total...