> For the complete documentation index, see [llms.txt](https://docs.coreid.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.coreid.org/user-tutorials-for-.core-domain/set-subdomains.md).

# Set Subdomains

**CORE ID supports unlimited levels of subdomains**

If you have a hello.core, you can create subdomains for free as follows:

*One.hello.*core 

*home.hello.*core

*green.home.hello.*core 

*go.green.home.hello.*core 

......

For each subdomain, you can bind different data