IP Reputation Check
IP Address Reputation Lookup & API
Perform a free IP reputation check to identify suspicious behavior, abuse signals, and risky IPs in real time. Review IP reputation history and threat activity before allowing access.
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Recent IP Reputation Tests
The following IP addresses had recent IP reputation checks.
IP Reputation Lookup FAQs
Use this free tool to check IP reputation and then run a full lookup for deeper intelligence. Create a free account for API and bulk lookup access.
Learn more about IP reputation
Understand IP reputation scores, improve trust, and monitor reputation with API and database options.
Understanding IP Reputation Scores
IP reputation scores usually range from 0 to 100. Higher values indicate greater risk based on abuse history, blacklist events, proxy usage, bot behavior, and other threat signals.
These insights help teams decide whether to trust, challenge, or block a connection. Use the full lookup for deep context, then automate decisioning with API responses.
How to Improve and Maintain Your IP Reputation
It is common for users that have recently taken over a new IP with a tarnished reputation to cleanup past issues. First, identify which blacklists your IP address is currently blocked on, then follow each provider’s delisting process.
Most services will delist IP addresses within 24 hours of a delist request, which can lower your IP reputation score across popular online services. Continue monitoring after you’ve removed the IP to avoid repeat entries hurting your chances of future delisting.
Managing IP Reputation: Best Practices & Prevention Tips
If you’re sending email from an IP address, scrub invalid emails with an email validation service to reduce bounces and prevent deliverability issues. Low bounce rates help protect your IP reputation and reduce the chance of being blacklisted.
If you’re using an IP for routine browsing, avoid suspicious behavior online. Provide accurate registration information, avoid duplicate accounts, and stay away from hacking or website attacks—honeypot traps and abusive activity can add your IP to active blacklists.
Best Tools to Check and Monitor IP Reputation
For manual checks, use the lookup tool on this page and the full report at IPQS IP lookup. For continuous protection, integrate the IP reputation API.
If you need on-premise scoring for large datasets, a downloadable IP reputation database is also available.
Downloadable IP Reputation List & Database Access
IPQS monitors over 4 billion IPv4 addresses and hundreds of billions of IPv6 addresses in an ever-changing threat landscape. For large-scale analysis, we recommend using our IP reputation API.
An IP reputation database solution is also available for download depending on your use case. Please reach out to our team to inquire about downloadable IP reputation list or locally hosted database options.
IP Warming Best Practices
Warming up IP addresses is a best practice for email marketing and transactional sending. During an IP warm up period, sending volume is gradually increased so mail providers see more natural sending patterns.
A common schedule is to start with up to 50 emails per day, then double that value every 3 days. This helps maintain a healthier IP reputation while avoiding blacklists.