We check Stack Overflow from our servers and combine it with problem reports from visitors.
Stack Overflow problem reports, last 24 hours
Reports from visitors per hour, in your local time. When reports rise well above the usual level, Stack Overflow is probably having problems.
Having a problem with Stack Overflow?
Choose what isn't working. Reports are anonymous and help other people see if the problem is widespread.
Most reported problems
Recent reports
- No reports in the last 24 hours.
Our checks of stackoverflow.com
Each bar is one hour. Green: every check reached stackoverflow.com. Amber: some failed. Red: all failed. Grey: not checked that hour.
What to do if Stack Overflow is not working
- Check Stack Overflow's official status page for incidents limited to a specific region or product.
- Look at the exact HTTP status codes you're getting. 5xx errors point to Stack Overflow; 4xx errors usually point to your request or credentials.
- Retry failed API calls with exponential backoff instead of hammering Stack Overflow during an incident.
- Confirm your API keys, tokens and billing are still valid. Expired cards cause sudden 401/403 errors.
- Test from a different network or region to rule out DNS or ISP routing problems.
- Hold off on deploys and config changes until Stack Overflow reports the incident resolved.
Stack Overflow outage FAQ
Is Stack Overflow down for everyone, or just me?
Look at the status at the top of this page. We connect to stackoverflow.com directly from our servers, so if our check works but Stack Overflow doesn't work for you, the problem is more likely your device, network or account. If our check fails, or reports have jumped in the last hour, Stack Overflow is probably having a wider outage.
Why does this page say Stack Overflow is up when it isn't working for me?
Our check confirms that stackoverflow.com is reachable and responding. An outage can still affect only part of Stack Overflow, such as logging in, the mobile app or a single feature, or only some regions. That's why visitor reports matter: when many people report problems at once, we flag Stack Overflow as having problems even if the website loads.
How often do you check Stack Overflow?
We check Stack Overflow automatically several times a day, and again whenever someone opens this page and our last check is more than a few minutes old.
How do I report a Stack Overflow outage?
Use "Report a problem" on this page to tell us what isn't working. Reports are anonymous: we don't store your IP address, only a one-way code that stops the same person reporting many times, plus your country.