Continuously expanding the I-root server footprint around the world

I-root
The Domain Name System (DNS) is the distributed hierarchical database on which most Internet services and applications rely and depend. The root of this hierarchy is anchored on 13 domain name servers scattered across the globe. 

I-root
17 Apr 2015
Netnod re-affirms its commitment to the Internet community, to operate i.root-servers.net in a stable manner, independent of any future changes to the IANA stewardship.
What are root name servers?