Blocklist Lookup
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DNSBL Server Results
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Check whether your IP address or domain is listed on major DNS-based blocklists (DNSBL) and blacklist databases used by email providers and security services.
Verify that your mail server IP maintains a good reputation to improve email deliverability and reduce the risk of messages being rejected or marked as spam.
Monitor the reputation of your domains and IP addresses to identify potential security issues, blacklist listings, and configuration problems before they impact your online services.
Frequently Asked Questions
What is a blocklist (blacklist)?
A blocklist, also known as a blacklist, is a database of IP addresses or domains identified as potential sources of spam, malware, phishing, or other unwanted network activity. Many email providers and security systems use these lists to protect users.
Why is my IP address or domain listed?
Your IP address or domain may be listed because of spam activity, malware infections, compromised systems, email misconfigurations, or a previously poor reputation associated with the same IP address.
How can I remove my IP from a blocklist?
First identify and resolve the underlying issue, then follow the removal process provided by the specific blocklist operator. Many providers offer online delisting requests after the problem has been fixed.
How does a blocklist affect my website or email?
A blocklisted IP or domain can reduce email deliverability, trigger spam filtering, and affect your online reputation. Some security services may also restrict access to listed domains or servers.
How often are blocklist results updated?
Update frequency depends on each blocklist provider. Some databases refresh continuously, while others update periodically after new threats are detected or delisting requests are approved.
Can I use Blocklist Check with other DomainScan tools?
Yes. Combine Blocklist Check with DNS Lookup, WHOIS Lookup, SSL Checker, Open Port Checker, and Domain Location Lookup to perform a more complete security and infrastructure assessment of your domain or server.