Overview
Konstant was a Norwegian-operated anti-spam blacklist that tracked IP addresses sending spam to Norwegian mail infrastructure. Regional blacklists like Konstant played an important role in the Nordic anti-spam ecosystem, addressing spam patterns particularly prevalent in Scandinavian markets.
The list was used primarily by Norwegian and Scandinavian mail administrators as a local supplement to international blacklists. Konstant has been discontinued and is no longer maintained.
How It Works
Konstant collected abuse data from Norwegian mail operators and spam traps. IPs sending unsolicited email to participating Norwegian networks were added to the list. As a regional list, it had particular visibility into spam campaigns targeting Nordic recipients.
How to Get Delisted
Konstant is no longer operational. No removal requests are possible. For deliverability to Norwegian and Scandinavian recipients, focus on active mainstream blacklists and consult with local ISPs if persistent issues arise.