Overview
SpamRATS DYNA specifically flags IPs that look like dynamic addresses. The primary signal is the PTR record β if an IP's reverse DNS name contains typical dynamic IP patterns (like "dynamic", "dhcp", "dial-up"), it gets listed.
SpamRATS operates three independent lists: DYNA (dynamic IPs), NoPTR (missing PTR records), and Spam (confirmed spam sources), each with different listing criteria.
How It Works
The system uses pattern matching to analyze PTR records for keywords that suggest dynamic allocation. Common triggers include dynamic, dhcp, ppp, dialup, cable, dsl, and similar naming patterns that ISPs typically use.
How to Get Delisted
Check your IP at spamrats.com/lookup. If you have a static IP that's been misidentified, contact your ISP to update the PTR record β remove keywords that suggest a dynamic address.