A website works on mobile data but not on Wi-Fi: why and how to fix it
If a website loads on mobile data but not on Wi-Fi, you have already learned the most useful fact: the site is up, and the fault is somewhere between your device and the internet on that Wi-Fi network.
The usual causes
- A stale DNS cache on the router. The router remembers an old address for the site.
- Your provider’s DNS or routing. Some providers have problems reaching particular sites.
- Filtering. Parental controls, network-level ad blockers or security services may block the site.
- IPv6 trouble. Some networks hand out IPv6 addresses that do not work properly with certain sites.
- A wrong clock or a captive-portal login on public Wi-Fi.
What to try
- Restart the router and wait a couple of minutes.
- Disconnect and reconnect your device to the Wi-Fi.
- Flush the DNS cache on your device.
- Switch your DNS server to a public one in the router or device settings.
- Check whether a filter, VPN or security app is blocking the site.
- On public Wi-Fi, open a plain website to trigger the sign-in page.
- If nothing helps, contact your internet provider and tell them which site and the time you tried.
Prove it is not the site
Run the address through the checker. If the probes around the world reach the site, you can tell your provider or network admin with confidence that the site works elsewhere.
Check a website now
Is it down for everyone, or just you? Paste an address and we test it from fifteen places.
Open the checkerRelated guides
- Website not loading? A step-by-step checklist
- Fix “server not found” and DNS_PROBE_FINISHED_NXDOMAIN
- Why a website can be down for some people and not others
Last updated 2 November 2026. Written by the siteupdown.com team. Spotted a mistake?