Canaca-com’s AS 33139 CANACA-210 rose from sixth place in August to first in September in SpamRankings.net for Canada from CBL data. Long-time winner Bell Canada’s AS 577 BACOM fell from first to fifth.

Two ASNs had big spurts of spam in September. iWeb’s AS 32613 got to second place in the last two weeks of the month. Like in August, IPWorld’s AS 19875 did one big spam spew, but this time it almost doubled its closest competitor, breaking 100,000 messages!

What is making Canada suddenly attractive to spammers?

-jsq