_headers file rules not applying to custom subdomains

[dig]

@zackseuberling

So what’s going on here?

development.playco.org is serving playco.org.

Why is it doing this? Because using branch subdomains is a feature of Netlify DNS. If you wish to use branch subdomains without using Netlify DNS read the following support guide

[Support Guide] How to use Netlify’s branch deploy feature without Netlify DNS

Last reviewed by Netlify Support Staff: May 2024 So - you’ve discovered the concept of branch subdomains and want to use them! But you can’t use Netlify’s DNS Hosting? Never fear, there is a way to do this and this post will explain how in detail! Please note, however, that going this route means missing out on single click setup and all the goodness it includes - for example, getting an SSL certificate configured automatically. We also have Automatic Deploy Subdomains, which allows users to …