[▲ Vercel Community](/) · [Categories](/categories) · [Latest](/latest) · [Top](/top) · [Live](/live)

[Feedback](/c/feedback/8)

# Second-level domain feedback

46 views · 1 like · 2 posts


bestZwei (@vibred) · 2025-06-24

.ciao.su is a public second-level domain, and i hope that when adding a custom domain to projects, it will no longer be necessary to add TXT records.


Anshuman Bhardwaj (@anshumanb) · 2025-06-24 · ♥ 1

Hi @vibred, welcome to the Vercel Community!

Thanks for posting this here. As I can see, `.ciao.su` is not part of the https://publicsuffix.org/list/public_suffix_list.dat.

Vercel follows the Public Suffix List (PSL) to determine which domains require DNS verification. If `.ciao.su` isn’t currently on this list, you’d need to:

1. Submit a request to add `.ciao.su` to the Public Suffix List at [Submit amendments to the Public Suffix List](https://publicsuffix.org/submit/)
2. Once it’s added to the PSL, let us know here and we'll make the changes.

The TXT record verification exists as a security measure to prevent unauthorized domain additions, so domains need to be officially recognized as public suffixes first.