Yes, you can configure your domains with A record to point them to Vercel, but this is usually only required for your Apex domains. We recommend using a CNAME record for subdomains unless there are special circumstances*.
To use a domain with Vercel using an A record, you need to add it with the value 76.76.21.21, which is one of the primary Anycast IP addresses of the Vercel Edge Network.
Additionally, if you already have any CAA records on your root domain, it is also necessary to include a CAA record with the value 0 issue "letsencrypt.org" to allow our certificate authority Let's Encrypt, to be able to issue a certificate for that domain.
See: Why is my domain not automatically generating an SSL certificate? for more details.
* In the situation where you need to issue custom certificates and your domain resolves to our CNAME record, you must use an A record and then you can create your custom CAA records. See How do I change CAA records when using the Vercel CNAME record? for more information.