A few weeks ago, I received a DNS change recommendation notification for one of my projects, so I updated the DNS settings to use the IP 216.198.79.1

Today, one of my customers from the Philippines contacted me saying they couldn’t access our services. After investigating, we found that one of the major ISPs there (PLDT) is blocking Vercel’s IP (216.198.79.1) through their firewall.

We temporarily switched back to the old Vercel IP, and everything is working fine now. However, it’s showing a warning in the Vercel domain settings.

It seems Vercel might need to take action to either get the IP unblocked (216.198.79.1) or assign a new one.