For reference, 2600 is a famous phreaking and hacking e-zine from the earlier days. The name 2600 itself is a reference to the 2600hz frequency used in Phone phreaking.
Just to clarify, they are from the early days, but they are also from the now days. They are still publishing. A link to their official site is in the above Wikipedia article.
They are, but sadly, blowing a 2600 down the line these days just gives someone in the CO a chuckle when they read the logs, a week later.