Is That Website Down Right Now, or Just You?
Probe any domain or URL instantly from our edge network
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Real-time log of probed sites, current availability, and last checked time (most recent first).
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How ItsUporDown Diagnoses Outages
When you enter a website, our edge probes test DNS resolution, SSL handshakes, and HTTP/HTTPS responses directly from independent cloud servers.
1. DNS & IP Resolution
We query authoritative nameservers to verify if the domain resolves to an active IPv4 or IPv6 address. If nameservers fail, the domain is unreachable worldwide.
2. SSL & TLS Handshake
We verify the secure certificate validity, protocol negotiation (HTTPS/TLS), and certificate expiration to detect security misconfigurations.
3. HTTP Response & Latency
We issue HTTP probes with millisecond resolution timing. Any 5xx code signals an internal crash, while 2xx/3xx confirms operational status.
Common HTTP Status Codes Explained
Understanding what each response code means when checking website availability:
Website is fully operational and responded with complete content payload.
Permanent or temporary redirect (e.g. HTTP to HTTPS or canonical domain).
Server is running, but access is protected by WAF, Cloudflare, or IP rule.
Edge proxy or load balancer cannot reach backend web application servers.
Server is temporarily overloaded, crashed, or down for maintenance.
Domain does not resolve to an IP. Domain expired, typo, or nameserver issue.
Featured Outage Guides & Articles
Learn how to troubleshoot connectivity issues, flush DNS caches, and understand server errors.
Is It Down or Just Me? The Ultimate Step-by-Step Diagnostic Guide
When a critical website refuses to load, follow this definitive 6-step checklist to isolate local DNS issues, ISP route failures, browser cache glitches, and genuine server outages.
Everything You Need to Know About Outages
Clear, technical answers to common questions about uptime monitoring, DNS propagation, and fixing website connectivity issues.
When you submit a domain, our cloud edge probes initiate a real-time synthetic probe directly from high-speed data centers. We query authoritative DNS nameservers, execute secure TLS handshakes, and record the exact HTTP response code, response latency (in milliseconds), resolved IP address, and server headers.
If ItsUporDown reports the website is "Operational" (Status 200 or valid redirect) from our cloud probe, but your personal device cannot open the page, the outage is isolated to "just you". This usually points to local Wi-Fi router DNS cache issues, ISP routing glitches, VPN conflicts, or browser extensions.
Still experiencing connectivity issues?
Read our in-depth guides on DNS resolution, proxy error recovery, and ISP diagnostics.