Free Dynamic DNS
| DDNS service provider | DDNS type | Url link to check applied domain | Url to update IP |
| https://www.noip.com/ | xxx.ddns.net | https://www.noip.com/members/dns/ | [[https://www.noip.com/login/|noip update]] |
| <del>http://dyn.com</del> | Not free any more |