DNS & Lookup Tools
IP Blocklist / Reputation Check
Enter an IPv4 address to check it against several public DNS blocklists, live via DNS-over-HTTPS.
📖 New to this? Read What Can Someone Do With Your IP Address?.
Example
8.8.8.8 comes back clean; a compromised or spam-sending IP would show as 🔴 Listed on one or more blocklists.
❓ Frequently Asked Questions
What is the IP Blocklist / Reputation Check used for?
Check whether an IPv4 address is listed on common DNS blocklists (DNSBLs) that mail servers and CAPTCHAs use.
Is the IP Blocklist / Reputation Check free and private?
Yes — it's free with no sign-up. The IP Blocklist / Reputation Check queries public network services (such as DNS or WHOIS) directly from your browser to fetch live results; IP Ducky never logs or stores what you look up.
Do I need to install anything to use the IP Blocklist / Reputation Check?
No. It works in any modern web browser on desktop, tablet, or phone — no downloads, no browser extensions, and no account required.