Daniel Karrenberg

Daniel Karrenberg

Chief Scientist at the RIPE NCC
Joined on February 28, 2008
Total Post Views: 234,740


Daniel Karrenberg is chief scientist at the RIPE NCC, the regional Internet registry for Europe and surrounding areas.  He directs research, creation and piloting of new services as well as general strategy development.

Karrenberg has been helping to build the Internet in Europe from its very beginnings.  In the 1980s he has helped to build EUnet into the first pan-European ISP.  In the 1990s he has helped to build RIPE and the first regional Internet registry: the RIPE NCC.  Karrenberg has served as the first CEO of the RIPE NCC until 2000 when he became its first chief scientist.  In 2001 his contributions to the development of the Internet have been recognised with the Jonathan B. Postel service award. 

A computer scientist by training, Karrenberg likes to invent, design and implement Internet related systems, especially those collecting and processing data about the Internet itself.  He also likes to occasionally inject physics, engineering and “networking style” into debates about Internet governance.

Except where otherwise noted, all postings by Daniel Karrenberg on CircleID are licensed under a Creative Commons License.


2010 - Nov 10 on The ISP Industry: Concentrated or Diverse?
2010 - Sep 07 on DNS Clients Do Request DNSSEC Today
2010 - Jul 21 on IPv6 "Ripeness": The Hard Numbers on ISPs and Deployment Rates

Topic Interests

DNSIPv6 Transition IPv4 MarketsAccess ProvidersRegional RegistriesCybersecurityThreat IntelligenceDNS SecurityNew TLDsNetworksInternet ProtocolRegistry Services

Recent Blogs

IPv4: Business As Usual

Measuring Root Server Performance

No Big Run on IPv4 in 2011

DNS Measurements with RIPE Atlas Data

Visibility of Prefix Lengths in IPv4 and IPv6

Popular Posts

How a Routing Prefix Travels Through the Internet

IPv6 “Ripeness”: The Hard Numbers on ISPs and Deployment Rates

IPv6 RIPEness: One Year Later

DNSSEC Takes Off in Wake of Root Zone Signing

RIPE NCC Publishes Case Study of youtube.com Hijack