Amazon Route 53 - Amazon Route 53 is a highly available and scalable DNS web service.
Comodo Secure DNS - Comodo Secure DNS is the leading DNS provider. We offer Managed DNS, Enterprise DNS, Authoritative, Anycast and CDN DNS hosting.
GoDaddy DNS - GoDaddy DNS helps manage website performance, reliability and security.
OpenDNS - OpenDNS provides faster and safer Internet access for your home or Business.
DNSimple - Domain Name Service with low cost hosted DNS, an easy to use web interface, and a REST API for automation. Hosting DNS has never been so simple.
Level3 DNS - Level3 DNS is one of the fastest DNS servers that provide you with the best performance while browsing the internet.