These are the domain extensions currently supported by yWhois. If you would like one added, please research the correct RDAP server for that extension, and go to the contact page to let the developer know.
| Extension | RDAP Server/URL |
|---|---|
| com | https://rdap.verisign.com/com/v1/domain/ |
| net | https://rdap.verisign.com/net/v1/domain/ |
| org | https://rdap.org/domain/ |
| info | https://rdap.org/domain/ |
| biz | https://rdap.org/domain/ |
| co | https://rdap.nic.co/domain/ |
| us | https://rdap.nic.us/domain/ |
| uk | https://rdap.org/domain/ |
| ca | https://rdap.org/domain/ |
| de | https://rdap.denic.de/domain/ |
| fr | https://rdap.nic.fr/domain/ |
| it | https://rdap.nic.it/domain/ |
| nl | https://rdap.org/domain/ |
| no | https://rdap.norid.no/domain/ |
| ly | https://rdap.org/domain/ |
| club | https://rdap.nic.club/domain/ |
| design | https://rdap.nic.design/domain/ |
| dev | https://rdap.org/domain/ |
| tech | https://rdap.org/domain/ |
| store | https://rdap.org/domain/ |
| site | https://rdap.org/domain/ |
| online | https://rdap.org/domain/ |
| website | https://rdap.org/domain/ |
| blog | https://rdap.org/domain/ |
| pro | https://rdap.org/domain/ |
| jobs | https://rdap.org/domain/ |
| mobi | https://rdap.org/domain/ |
| travel | https://rdap.org/domain/ |
| name | https://rdap.org/domain/ |
| cc | https://rdap.org/domain/ |
| tv | https://rdap.nic.tv/domain/ |
| fm | https://rdap.org/domain/ |
| asia | https://rdap.org/domain/ |
| in | https://rdap.registry.in/domain/ |
| is | https://rdap.org/domain/ |
| cx | https://rdap.nic.cx/domain/ |
| org.uk | https://rdap.org/domain/ |
| co.uk | https://rdap.org/domain/ |