IP Reputation

IP Address Reputation Lookup & API

Use Fraudo.io’s free IP reputation tool to get a fast, clear picture of how trustworthy any IP address is.

We tap into a global network of threat data to spot spam signals, suspicious activity, fraud scores, and patterns that may be causing your IP to be blocked or flagged.

Why Your IP Might Be at Risk

If your IP has a shady past like sending spam, being linked to a compromised system, or behaving oddly online, it might be carrying a bad reputation.

It’s even worse if the IP is part of a proxy, VPN, or anonymous network. That’s where our real-time IP checks come in handy.

Understand IP History & Behavior

A single IP address can tell you a lot. Many top websites rely on IP reputation data to detect bots, stop fake sign-ups, block spam, and verify payments.

A risky IP can cause emails to land in spam, logins to fail, or purchases to be blocked. IP quality is often tied to the network it belongs to, including data centers, hosting services, or mobile carriers.

If an IP neighborhood is known for bad traffic, entire ranges may be blocked as a precaution.

What Impacts Your IP Fraud Score?

Fraud scores increase when:

• The IP is known to host proxy or VPN services
• It’s tied to bots or credential stuffing attacks
• It’s hit by multiple blacklist reports in a short time
• It’s been involved in spam or fake activity

Our IP reputation API checks all of this in real time to help you catch red flags before they become a problem.

Run a Check on Any IP (IPv4 or IPv6)

Fraudo.io supports worldwide IP coverage for both IPv4 and IPv6 addresses. Whether you're checking a signup, login, or payment request, a quick lookup reveals everything you need to know.

Want to automate it? Use our API to plug IP checks directly into your platform.

IP Reputation Matters: Here’s Why

Every IP address carries a digital footprint. If it’s been abused for spam, brute force attacks, or scams, that reputation sticks.

Our system uses threat intelligence, honeypots, and historical abuse reports to calculate risk scores and help you flag fraud fast.

How to Improve a Bad IP Reputation

• Find out where you're blacklisted. Our tool shows which lists flag your IP.
• Delist yourself using blacklist removal request processes.
• Avoid repeat offenses by keeping bounce rates low and traffic clean.

Cleaning Up a Flagged IP

Start by checking which blacklists are flagging your IP. Once identified, submit removal requests following their guidelines.

Staying clean afterward is critical. Repeated spam or shady traffic makes recovery much harder.

Sending Email? Keep Your IP Clean

IP reputation directly affects email deliverability. Validate email lists, avoid spam traps, and clean inactive users regularly.

Avoid spammy subject lines, suspicious links, and sudden volume spikes to protect your sender reputation.

Just Browsing? Stay Legit

Stick to reputable sites, avoid automation tools, and always provide real information when signing up.

Fake details or suspicious behavior can trigger honeypots and damage your IP reputation instantly.

Email Senders: Warm Your IP the Right Way

Start slow with new IPs. Send around 50 emails a day, then gradually increase volume while monitoring inbox placement.

Proper warm-up builds trust with providers and protects long-term deliverability.