100 Known Spam Operations responsible for 80% of your spam.
80% of spam received by Internet users in North America and Europe can be traced via aliases, addresses, redirects, locations of servers, domains and dns setups, to a hard-core group of around 100 known spam operations, almost all of whom are listed in the ROKSO database.
Each spam operation, or “spam gang”, consists on average of between 1 to 5 spammers (giving an etimated total of 300-400 spammers).
The majority of the spammers on the ROKSO List operate illegally and move from network to network and country to country seeking out Internet Service Providers with poor security or known for not enforcing of anti-spam policies.
Many of these spam operations pretend to operate ‘offshore’. Those who don’t hide behind anonymity pretend to be small ‘ISPs’ themselves, claiming to their providers that the spam is being sent not by them but by non-existent ‘customers’. When caught, almost all use the age old tactic of lying to each ISP long enough to buy a few days or weeks more of spamming and when terminated simply move on to the next ISP already set up and wating.
Without further ado jump over to Spamhaus