The domain troubleshooting guide can help with most custom domain configuration issues. You might be able to use that guide to solve it before a human is available to help you. Then you can come back here and share the answer for bonus points.
You can also use v0 to narrow down the possibilities.
Hi @bimal009, welcome to the Vercel Community!
It seems like you’re trying to set up wildcard domains. Have your followed the Adding & Configuring a Custom Domain docs to ensure the NS is setup correctly? You must use Vercel NS to use Wildcard domains.