Check IP Reputation & IP Blacklist Status
Free IP lookup API to uncover fraud, bots, and high risk users.
Use this free IP checker powered by real-time, enterprise grade IP intelligence to instantly detect if an IP address has a history of fraud, suspicious behavior, or other risk signals that may be impacting your traffic quality.
Higher IP risk scores often point to abuse including bot driven automated traffic, compromised devices, or activity routed through proxies, VPNs, or anonymizers.
Free IP Checker: Lookup IP Reputation History
Get info on:
IP Reputation Score: Low | Medium | High | Extreme
Proxy Detection: True/False
VPN Detection: True/False
Data Center Traffic: True/False
Search Engine Bot: True/False
Masked Devices Detected: True/False
Enter any IPv4 or IPv6 address to view IP reputation, IP blacklist status, and IP risk profile:
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Free IP lookup API to uncover fraud, bots, and high risk users.
What Is an IP Reputation Score?
An IP reputation score reflects the likelihood that an IP address is associated with malicious, automated, or non-human behavior. These IP scores are used in fraud prevention, cybersecurity, email deliverability, and even marketing automation.
Whether you’re filtering traffic, scoring leads, or blocking threats, understanding IP reputation is essential to safeguarding your platform and protecting your revenue. Perform an IP check on any IPv4 or IPv6 address globally using our on-page tool or integrate with our Bot & Fraud API for automated analysis.
Why Enterprise Teams Check IP Reputation
High-scale operations are flooded with traffic. The challenge isn’t just identifying who is visiting, it’s knowing whether those visitors are safe, risky, or malicious.
Common Use Cases for Enterprise IP Monitoring:
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Use Case
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Why IP Reputation Matters
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Ad Tech
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Stop ad fraud by identifying bots, invalid traffic (IVT), and proxy users.
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Affiliate Marketing
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Detect fake conversions, lead stuffing, and geo-mismatched clicks.
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Lead Generation
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Score leads in real time and reject low-quality traffic at the gate.
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E-Commerce
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Prevent carding attacks, account takeovers, and fraud rings.
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Cybersecurity
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Identify access attempts from risky IPs or known anonymizers.
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Email Deliverability
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Improve inbox placement and reduce spam flags.
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How to Improve Your IP’s Reputation
If your own company’s IP address is suffering from poor reputation, perhaps due to inherited IP space or email marketing issues, there are actionable steps to take:
- Check Your IP Against IP Blacklists
Use our free IP address blacklist check to identify issues and reasons - Secure Your Infrastructure
Ensure no malware, open relays, or scripts are sending automated traffic. - Warm Up New IPs Slowly
Ramp up email or API usage to demonstrate human, consistent behavior. - Monitor Continuously
Use our IP Reputation check to monitor your own IPs for any sudden changes.
IP Blacklists: What They Are and Why They Matter
What Is an IP Blacklist?
An IP blacklist is a real-time database that tracks IP addresses linked to suspicious, abusive, or fraudulent activity. These lists are used across a wide range of industries including digital advertising, affiliate marketing, cybersecurity, e-commerce, and FinTech to flag or block risky traffic. Email providers, fraud prevention tools, web platforms, and API gateways rely on blacklists to help filter out bots, spam, and malicious users before they can impact operations.
Being listed on a blacklist can result in:
- Blocked marketing emails
- Slowed or stopped transactions
- Lower lead scores
- API throttling
- Platform bans
FAQ: IP Blacklist & IP Reputation
Q: What causes an IP to be blacklisted?
A: Spam, malware, bot activity, anonymizer use, and suspicious patterns all contribute.
Q: How do I remove my IP from a blacklist?
A: The first step is to identify which blacklist has flagged your IP. Once confirmed, visit the website of that IP blacklist provider. Most offer a lookup and removal tool. Depending on the list, removal may be automatic after a clean period of activity, or it may require submitting a delisting request and providing a reason. You may also need to fix the underlying issue that triggered the listing, such as spam activity, malware, or insecure server settings. Monitoring your IP regularly and maintaining good sending practices can help prevent future listings.
Q: Can I download an IP reputation or IP Blacklist?
A: Yes. Enterprise clients can access bulk IP data via downloadable CSV or local database integration.
Q: Why does IP reputation matter?
A: Every click, visit, and transaction on your site starts with an IP address. For enterprise-level teams, IP intelligence is one of the fastest and most reliable ways to gauge trust.
IP Reputation scores are based on behavior patterns and abuse signals—things like:
- Repeated bot traffic or automation
- Hosting from known fraud-prone networks
- Proxy or anonymizer use
- Previous reports of spam, scraping, or fraud
IP reputation helps platforms decide which users to let in, which to watch, and which to block outright.