deployments return RESOURCE_NOT_FOUND without VPN but work with VPN

Help
1

Hi,
I’m experiencing a strange issue with multiple Vercel deployments.
When I access my deployments normally, I get:

404: NOT_FOUND
Code: RESOURCE_NOT_FOUND

Response headers:

X-Vercel-Error: RESOURCE_NOT_FOUND
X-Vercel-Id: fra1::...

Example deployment:

https://streamify-player.vercel.app

What’s confusing is that:

  • The deployments are healthy and deployed successfully.

  • The exact same URLs load correctly when I connect through a VPN.

  • This affects multiple Vercel deployments, not just one project.

  • DNS resolution works correctly.

  • Ping works normally.

  • curl -I returns the same RESOURCE_NOT_FOUND response when not using a VPN.

  • The projects are Next.js applications.

Example curl output:

HTTP/1.1 404 Not Found
X-Vercel-Error: RESOURCE_NOT_FOUND
X-Vercel-Id: fra1::dgzrv-1780462390502-16decc05915e

it was fine for the past week but Because multiple deployments are affected and everything works through a VPN, I’m wondering if this could be related to regional routing, edge network behavior, ISP issues, or a hostname mapping problem on a specific edge region because someone from the same region (iran) tried and got the same error code.

2

There’s another community post with 404 debugging tips that might be helpful. Please give these solutions a try and let us know how it goes.

A human should be around soon to offer more advice. But you can also get helpful information quickly by asking v0.