Packet Clearing House

Packet Clearing House (PCH) is a global non-profit organization providing operational support and security to critical Internet infrastructure, including Internet exchange points and the core of the domain name system. PCH has been working with the Internet industry since 1995 to make the domain name system faster, more scalable and more resilient against attack. PCH pioneered the use of anycast technology to distribute DNS load among more servers in more places, anycasting top-level domain name servers since 1997 and root name servers since 2001. Today, PCH operates the world's largest authoritative DNS service network in the world, hosting two of the thirteen DNS root servers and more than 400 top-level domains on hundreds of servers in 180 locations globally. PCH is also the operator of the only FIPS 140-2 Level 4 DNSSEC signing platform other than the root itself. PCH operates public looking glasses and routing data-collection facilities at approximately a third of the world's public Internet exchange points in the fulfilment of its research charter. It makes its routing tables available to researchers, the operations community and the public in real time at its looking glass site, and as a historical archive, either by request or at our archives.