Vercel custom domains unreachable from Moroccan mobile networks – specific Anycast IPs timeout

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1

Hello,

I am experiencing a reproducible connectivity issue affecting Vercel custom domains from Moroccan mobile networks.

Affected domains:

The native Vercel deployment works from the same mobile networks.

The issue has been reproduced on:

  • Orange Maroc 5G (AS36925 MEDITELECOM)
  • INWI mobile network

I followed the official Vercel connectivity troubleshooting guide and ran the official vercel-connect-debug script from a Windows PC connected to an affected Orange Maroc 5G hotspot.

The debug output shows:

  • 216.198.79.1 → TCP/443 timeout
  • 216.198.79.65 → TCP/443 timeout
  • 64.29.17.1 → TCP/443 timeout
  • 64.29.17.65 → TCP/443 timeout

while:

  • 216.198.79.129 → HTTP 200 OK
  • 216.198.79.193 → HTTP 200 OK
  • 64.29.17.129 → HTTP 200 OK
  • 64.29.17.193 → HTTP 200 OK

The same Host header mapasserelle.com is served correctly on the reachable IPs.

DNS is valid and authoritative through:

Vercel Dashboard shows Valid Configuration, CDN Active and valid SSL.

The problem therefore appears to be related to Anycast routing / reachability for specific Vercel IPs from Moroccan mobile networks.

I can provide the complete vercel-debug.txt output generated with the official Vercel tool.

Could someone from Vercel please escalate this to the network engineering team?

2

The domain troubleshooting guide can help with most custom domain configuration issues. You might be able to use that guide to solve it before a human is available to help you. Then you can come back here and share the answer for bonus points.