Free DNSBL for Service Providers

Stopping spam at the source since the year 2000. Let us help your inbox achieve 0 Spam. DNSBL | 0spam Spam Trap Primary Database Network Black List | Spam Source Networks, high volume of spam trap hits in a Class C block will result in network listings in this DNSBL. URL Black List | This list contains the IP address of domains found to be in the source of spam emails found in our traps.

Why is my IP Listed? | IP Removal Process:

Enter the suspected IP address to verify which of the 0Spam DNSBL's its currently listed on:

What do I do if my IP is Listed?

  1. Fix the source of the spam problem.
  2. Create an account and verify your contact details

How much does it cost?

Nothing. The 0Spam Project is absolutely free for email providers, IT professionals and general removal request. If you would like to donate to the 0spam project you can donate here.

How does the 0spam service work?

Any time spam is sent to our spam traps, an IP will be listed in the 0spam dnsbl( with the data code of 127.0.0.# and if multiple trap hits are being detected from a single Class C set of IP's the block will be listed in the 0spam Network DNSBL(

Why 0spam?

We've combined machine learning to an intelligent anit-spam design in order to build the 0spam project.

New* Features:

  1. Abuse notifications to the Regional Internet Registries(RIR) whois abuse contacts for each IP address found to be sending spam. Abuse contacts are the official IP abuse contact as designated with IP allocations from AFRINIC, APNIC, ARIN, LACNIC and RIPE.
  2. IP Notification service.