Question 1

What is IP reputation?

Accepted Answer

IP reputation is a score or classification that describes how trustworthy or risky an IP address is, based on historical behaviour. IPs used for spam, malware distribution, brute force attacks, or other malicious activity earn poor reputation scores in threat intelligence databases.

Question 2

Why is my IP address blacklisted?

Accepted Answer

Common reasons include: sending spam or phishing emails, hosting malware, being part of a botnet, conducting port scans or brute force attacks, or being assigned by an ISP to a shared pool that was previously abused. Shared hosting, VPNs, and Tor exit nodes are frequently blacklisted.

Question 3

How do I delist my IP from a blacklist?

Accepted Answer

Each blacklist has its own delisting process. For major blacklists: Spamhaus (check.spamhaus.org/delisting), MXToolbox (mxtoolbox.com), and Barracuda (barracudacentral.org). Fix the root cause first (malware, compromised account) before requesting removal.

Question 4

What is AbuseIPDB?

Accepted Answer

AbuseIPDB is a collaborative blacklist database where network administrators and security professionals report IPs involved in malicious activity. It tracks attacks, spam, port scans, and other abuse. An IP with a high confidence score indicates widespread abuse reports.

IP Reputation Checker

Frequently Asked Questions