u/Dazzling_Kangaroo_69

I ran into a weird issue today with my Railway deployment and after debugging for hours, it looks like the problem may actually be JioFiber DNS.

My app domain:

`https://Z\*\*\*\*i-production.up.railway.app\`

Problem:

* Railway dashboard showed the domain correctly

* Deployment was healthy

* Public DNS resolvers worked

* But browser + system DNS on JioFiber failed

This failed:

```powershell

nslookup Z****i-production.up.railway.app

```

Output:

```powershell

*** reliance.reliance can't find Z****i-production.up.railway.app: Query refused

```

But these worked perfectly:

```powershell

nslookup Z****i-production.up.railway.app 1.1.1.1

nslookup Z****i-production.up.railway.app 8.8.8.8

```

Both resolved correctly to Railway IPs.

The second I enabled Cloudflare WARP everything started working instantly.

So now I’m wondering:

* Is JioFiber filtering/blocking Railway domains?

* Is this some IPv6 resolver issue on Reliance DNS?

* Is Railway’s DNS propagation incompatible with some Indian ISPs?

* Anyone else facing this with Railway.app, Vercel, Render, Fly.io, etc?

Would love to know if others in India are seeing the same issue.