Looks like it's been winding down for a while now.

What a shame - this was the only place in recent memory where I could talk directly with "level 2+" tech support for my ISP.

https://news.ycombinator.com/item?id=42768811

Looks that way.

"dslreports.com is mostly closed

only the home page is currently available

members and guests may return for the first 5 minutes of any hour and this might change without any notice (DHMU -Justin)"