Is a Website Actually Down, or Just Blocked for You?
A site won’t load. Is it actually down, or is something on your end - your network, your ISP, a firewall - the real problem? These look identical from where you’re sitting, but they call for completely different next steps, so it’s worth knowing how to tell them apart.
Why this is harder to tell than it seems
The obvious thing to try is refreshing, or checking the site on your phone’s mobile data instead of WiFi. That works sometimes, but it’s not a reliable test - mobile data and WiFi can both go through the same upstream network restrictions, and a site can be slow or flaky in a way that makes “is it down” genuinely ambiguous from a single vantage point.
We wrote previously about how DNS-level blocking can make a site look broken even when it’s running perfectly fine elsewhere. But blocking is only one possible cause - the site could also genuinely be down, overloaded, or misconfigured. Telling these apart needs more than one data point.
Checking from two places at once
Our Is This Site Down? tool is built around exactly this problem. It runs two independent checks and shows you both:
- From our server - a real request from a neutral network, reporting the actual HTTP status code the site returned (or a genuine timeout/connection failure). This tells you whether the site itself is responding normally, independent of your own network.
- From your browser - a live connection attempt from your current device and network. This can only confirm whether a connection succeeded, not the exact status code, but it reflects your specific network path.
Comparing the two gives you a real answer instead of a guess:
| Our server | Your browser | What it likely means |
|---|---|---|
| Responds fine | Reachable | The site is up - no issue |
| Fails or times out | Fails | Probably a genuine outage or server problem |
| Responds fine | Not reachable | Likely something on your side - network, ISP, firewall, or an extension - not the site |
| Fails | Reachable | Inconclusive - can happen due to routing differences, not a strong signal either way |
Why this beats guessing from a single check
A single check from your own browser can’t distinguish “the site is broken” from “my network can’t reach it right now” - both look like a failed connection. Adding a second, independent check from a different network is what actually resolves the ambiguity, the same principle behind our DNS Lookup tool’s reachability comparison, which does something similar specifically for DNS resolution.
If you’ve confirmed a site is genuinely reachable and responding but still seems slow, that’s a different problem - our Global Latency Checker can help you see whether your connection to that part of the world is generally fast or slow, which is a separate question from whether the site is up at all.