IP Blacklist Check
Check if an IP address is listed on DNSBL providers — verify reputation and block-list status
IP Address
Public DNSBL providers may restrict or rate-limit queries from cloud/datacenter IP ranges per their usage policy — an "Error" status can mean the query was blocked rather than that the IP is clean.
About IP Blacklist Check
Check whether an IP address is blacklisted across major DNSBL providers. This tool queries multiple real-time block lists to reveal reputation issues that could be sending your mail to spam or blocking your traffic. Diagnose deliverability problems in seconds.
- Checks multiple DNSBL providers
- Reveal mail and reputation issues
- Fast, free reputation lookup
Frequently asked questions
Why is my IP blacklisted?
Common causes include spam complaints, malware, open relays, or sharing an IP range with bad actors — each listing provider explains its reason.
How do I get removed from a blacklist?
Fix the underlying issue, then request delisting through the specific provider's removal process.