Problem

Recently our campoany new website migrate to Vercel. The old webiste domain is non-WWW.
Consider the original website SEO.
We need bindding second domain in Vercel.

but it's not working.

https://abc.com 

Referring to Vercel offical documentation to do, but is not working

Discover nzxt's website，they also using Vercel, but they can bindding second domain

I using online nslookup tool get nzxt's DNS A record

https://mxtoolbox.com/

Change our DNS

I thing ip is wrong in vercel offical documentation. Modify Cloudfalre DNS A record， from 76.76.21.21 to 76.223.126.88

See it's work

Make sure custom domain setting in Vercel