DtDNS has been discontinued. Similar sites and apps include Quad9, which is free. Other options are Duck DNS, Cisco Umbrella, OpenNIC and No-IP. You can choose from more than 10 Dynamic DNS Services like DtDNS for Linux, Windows, Mac, self-hosting and Android.
BuddyNS is the fastest-to-synchronize DNS service on the Internet. Whenever you add or modify records for your domain name, BuddyNS synchronizes within 10 minutes, or immediately with SyncNOW!. As a comparison, most alternative services synchronize in one to twelve hours.
Free DNS service for the self-reliant people who want to experiment on their own, or keep all their zones in a single place.
This Free DNS hosting service is provided to help people that don't want to lose time and money with providers not always reactive to DNS changes.
Dynamic DNS is a service that allows you to access a remote machine through a domain name instead of knowing it's IP address.
Authoritative, dynamic and geo-DNS, traffic balancing, CDN offload, domain services and DNS firewall. With full DNSSEC support.
China
Fast DynDNS, NoIP alternative. Free service, long-term hostnames (yearly update is enough), ipv6 compatible.
