Craigslist technical contact - IP Ranges blocked

Mon Feb 18 06:01:13 UTC 2019

Hello All,

Does anyone know the best way to get connect to Craiglist technical 
support regarding the blocked IP ranges. We are an ISP in Canada, and 
since early this year we noticed that most of our IP blocks are blocked 
on some of the Craigslist's servers. One easy example is finding any 
items on Craigslist, hit reply, and gives an error "Sorry, something 
went wrong", the web analyzer indicates status code 403 forbidden.

I understand that if individual subscriber IP could be automatically 
blocked due to certain reasons by Craigslist, but I don't know why our 
entire IP blocks could be blocked, even some IP ranges are never 
assigned to any active services.

Did anyone have the encountered the same issue before, how can we get it 
resolved?

Thanks,

Erik