DNS

Free public DNS Resolver, which is fast and secure (encrypt your DNS query), provided by Cloudflare. Useful to bypass your internet provider's DNS blocking, prevent DNS query spying, and to block adult & malware content. It can also be used via API. Note: Just a DNS resolver, not a DNS hoster.

Free DNS service with API and lots of other free DNS features included.

Free DNS hosting up to 1 domain with 50 records

Free DNS hosting with API support, designed with security in mind. Runs on open-source software and is supported by SSE.

Free DNS hosting service with Dynamic DNS Support

Free DNS hosting.

Free DDNS with up to 5 domains on the free tier. With configuration guides for various setups.

Free DDNS service with API support and management of a lot of dns record types (like CNAME, MX, SPF, SRV, TXT and others).

Free DNS hosting. Also, provide free subdomains based on numerous public user contributed domains. Get free subdomains from the "Subdomains" menu after signing up.

Free DNS hosting for up to 3 domains and DNSSEC support

Free DNS hosting from Hetzner with API support.

Free DNS hosting by Huawei

Free .localcert.net subdomains compatible with public CAs for use with-in private networks

Free DNS hosting, three domains, all features with reasonable limits

Free DNS. No limit on the number of domains

DNS-based firewall, 300K free queries monthly

Free DDNS service without registration, tracking, logging or advertising. No limit to domains.

a dynamic DNS service that allows up to 3 hostnames free with confirmation every 30 days

Free DNS service that when queried with a hostname with an embedded IP address returns that IP address.

Free DNS hosting for 5 domains.

Free DNS hosting with Dynamic DNS Support.

Free DNS hosting service with instant DNS propagation. Free plan: 1 DNS zone (domain name) with up to 10 DNS records.