Impact on Email and Website Services:

This depends on the policies of the third-party DNS service providers. While there are typically no issues during the transfer process, your current domain registrar may choose to either continue or discontinue DNS support based on their standard operating procedures once the transfer is complete, provided you are using their NS.

DNS Support After Transfer: 

Most registrars will stop providing DNS services immediately after the transfer is complete. However, some registrars may offer a grace period (24-48 hours) during which DNS services continue. It is essential to check with the specific registrar for their policies.

Third-Party Name Servers: 

If a customer is using third-party name servers (like Cloudflare) that are not associated with the losing registrar, the DNS records will remain intact during the transfer. This means that as long as the name servers are not changed, the existing configurations will continue to work.

If you need specific references or details, we recommend checking with your current domain registrar's customer support for the most accurate information.