Check your IP in 100+ Blacklists
Instantly check whether your IP or domain is in over 100 RBL/DNSBL blacklists. Real-time results and detailed removal instructions.
Protect your server's reputation
Check in real time whether your IP or domain is in the main global blacklists.
The G Tech Group Blacklist Checker lets you instantly check whether your IP address or domain is in over 100 RBL/DNSBL blacklists. If your server ends up on a blacklist, your emails could be rejected or land in spam.
With our free tool you can identify the problem, consult the removal instructions specific to each blacklist and restore the deliverability of your emails in a few minutes.
Main Features
Everything you need to check and protect your IP's reputation.
100+ Blacklists Monitored
Simultaneous scan of over 100 RBL/DNSBL databases including Spamhaus, Barracuda, SpamCop, SORBS, UCEPROTECT and CBL.
Real-Time Results
Progressive display of results during the scan. Complete results in less than 30 seconds.
IPv4, IPv6 and Domains
Full support for IPv4, IPv6 addresses and any valid domain. Check everything with a single tool.
Removal Instructions
For every blacklist that flags your IP, you receive detailed instructions and direct links to request removal.
Advanced Filters and Search
Filter results by status, search for specific blacklists and sort the data for a fast, effective analysis.
100% Free and Anonymous
No registration, no hidden costs, no personal data required. Unlimited and completely anonymous checks.
Complete Check
An in-depth check of your IP's reputation in a few seconds.
Our Blacklist Checker simultaneously queries all the main global blacklists and gives you a detailed report with the status of each individual list, removal instructions and direct delisting links.
- Simultaneous scan of over 100 RBL/DNSBL blacklists
- Progressive real-time results during the check
- Full support for IPv4, IPv6 and domains
- Detailed removal instructions for each blacklist
- Direct links to the blacklists' delisting pages
- Complete export of the check report
- Advanced filters and search by blacklist name
- No registration or personal data required
Integrated Tools
Beyond the Blacklist Check, a suite of tools for the health of your email domain.
Blacklist Check
The main scanning tool: check IPs and domains in over 100 blacklists with real-time results.
MX Lookup
Check of DNS MX records with priority control to make sure your mail is configured correctly.
DMARC Check
Analysis of DMARC policies with SPF and DKIM validation to protect your domain from spoofing.
Main Blacklists
We monitor the most influential blacklists that determine the deliverability of your emails.
Being listed on even one of these blacklists can cause your emails to be rejected by most providers. Our tool checks all the most important ones plus 90+ additional databases.
Spamhaus
SBL, XBL, PBL, ZEN — the most authoritative blacklist in the world
Barracuda
BRBL — used by thousands of organisations to filter spam
SpamCop
Blacklist based on user reports and automatic spam traps
SORBS
Spam and Open Relay Blocking System with several specialised databases
UCEPROTECT
3-level system: single IP, range and full ASN
CBL
Composite Blocking List — detects compromised IPs and botnets
How It Works
Check your IP in 4 simple steps.
Enter IP or Domain
Type the IPv4, IPv6 address or the domain you want to check. No registration required.
Real-Time Scan
The system queries over 100 blacklists simultaneously, showing the results progressively.
Analyse the Report
Review the detailed report with filters, search and status for each checked blacklist.
Request Removal
Follow the specific instructions and direct links to request delisting from the blacklists.
Frequently Asked Questions
Answers to the most common questions about blacklists and our tool.
What is an email blacklist?
A blacklist (or DNSBL/RBL) is a database of IP addresses and domains flagged for sending spam or suspicious activity. Mail servers consult these lists to decide whether to accept or reject incoming emails.
Why did my IP end up on a blacklist?
The most common causes are: sending spam (even unintentionally), a compromised or malware-infected server, incorrect DNS configuration (missing SPF/DKIM/DMARC), sending large volumes of email without authentication, or a shared IP with other problematic users.
How can I remove my IP from a blacklist?
For every blacklist that flags your IP, our tool provides detailed instructions and direct links to the delisting page. Generally you need to fix the problem at the source (spam, malware, configuration) and then request removal.
Which are the most important blacklists?
The most influential are Spamhaus (SBL, XBL, PBL, ZEN), Barracuda BRBL, SpamCop and CBL. Being listed on these can cause most of your outgoing emails to be blocked.
How often should I check my IP?
We recommend a weekly check for active mail servers and an immediate check if you notice deliverability problems. For critical servers, consider automated monitoring via our Uptime Monitoring service.
Is the service really free?
Yes, the Blacklist Checker is completely free, with no usage limits and no registration. We don't ask for any personal data and the checks are anonymous.
Do you also support checking domains?
Yes, in addition to IPv4 and IPv6 addresses, you can check any valid domain. The system automatically resolves the associated IP and checks its presence in all the blacklists.
Is my check data saved?
No, we don't keep any data related to your checks. The service is completely anonymous and GDPR compliant. No logs, no tracking.
Why monitoring blacklists is essential
An IP on a blacklist can compromise your company's communication.
DNS blacklists (DNSBL) are public databases used by mail servers to filter spam and malicious activity. When an IP address is added to one of these lists, emails sent from that server are automatically rejected or classified as spam by most email providers, including Gmail, Outlook and Yahoo.
The most frequent causes of being blacklisted include servers compromised by malware, unintentional spam sending through unprotected forms, incorrect DNS configurations and the lack of authentication protocols such as SPF, DKIM and DMARC. Even a shared IP can be penalised due to the behaviour of other users on the same server.
Proactive monitoring is essential: identifying a listing promptly lets you act before the block spreads to other blacklists. Our tool simultaneously checks over 100 databases, providing a complete and immediate picture of your IP's status, with precise instructions to request removal from each list.
Is your IP on a blacklist?
Find out right now with a free check across over 100 blacklists. Results in less than 30 seconds, removal instructions included.