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Website Troubleshooting

Website works on mobile but not Wi-Fi

Mobile data and Wi-Fi use different networks, DNS resolvers, IP addresses and sometimes different IPv6 support.

Common causes

DNS cacheWi-Fi resolver still has stale records.Try another resolver or wait for TTL.
Router filteringLocal router or security app blocks the site.Check parental controls and DNS filters.
IPv6 differenceOne network uses IPv6 and the other does not.Check A and AAAA records.
IP blockThe website blocks your Wi-Fi public IP.Compare public IP and ASN.

Checklist

  1. Check public IP on Wi-Fi and mobile data.
  2. Run DNS Lookup for the domain on both paths if possible.
  3. Check whether Wi-Fi uses IPv6.
  4. Try clearing browser DNS/cache or changing DNS resolver.
  5. Use Port Check and HTTP Header Check to confirm server reachability.

If mobile works and Wi-Fi fails only for one website, local DNS, router filtering or an IP-based block is likely. If many websites fail on Wi-Fi, focus on router, ISP or DNS resolver health.

For site owners, this symptom is useful because it separates user-specific problems from global outages. Ask the user whether mobile data, another Wi-Fi network or a VPN works. If yes, compare the failing network public IP, DNS answer and IPv6 behavior. If every network fails, the problem is more likely on the website side.

FAQ

Can a website block only my Wi-Fi?

It can block or challenge the public IP used by your Wi-Fi network while allowing mobile carrier traffic.

Why does restarting router help?

It can clear local DNS/cache state or obtain a new public IP from the ISP.

Can IPv6 cause this?

Yes. If one network prefers broken IPv6, the website may fail only on that network.

Related guides

Website Not LoadingFull checklist.IPv6 Website Not LoadingCheck AAAA issues.DNS PropagationResolver cache behavior.