The following is a list of select managed DNS providers. Managed DNS providers manage your DNS records. You have to worry about your web server while they worry about DNS requests.
Affilias, Verisign, Internap, and Neustar didn’t publish their prices on their website at the time this article was written. You have to contact the respective companies and request a quote from them. Everyone else listed below had the prices for managed DNS services listed somewhere on their site.
EasyDNS
https://www.easydns.com/
DNS Made Easy
http://www.dnsmadeeasy.com/
Dyn
http://dyn.com/managed-dns/
FreeDNS by Namecheap
https://www.namecheap.com/domains/freedns.aspx
Google Cloud DNS
https://cloud.google.com/dns/docs?hl=en
No-IP.com
http://www.noip.com/
DNSimple
https://dnsimple.com
Affilias
http://www.afilias.info/products-services/dns
Verisign
http://www.verisign.com/en_US/security-services/dns-management/index.xhtml
Internap
http://www.internap.com/network-services/managed-dns/
Neustar
https://www.neustar.biz/services/dns-services
Zerigo
https://www.zerigo.com/managed-dns
CloudFlare
https://www.cloudflare.com/dns/
DNS by Comodo
http://dnsbycomodo.com/pricing/
GoDaddy DNS Services
https://www.godaddy.com/domains/dns-hosting.aspx