The most widely accepted origin story is that a student programmer in the mid-2000s created a proxy server on a physical computer located in of their high school. They hosted the games locally, and the internal IP address leaked. When the school blocked the main port, the student cloned the site to free web hosts, keeping the name as homage.
She wrote them down. 3-3-3-1-1-1-2-2. She stared at them on the page. Then she understood. Classroom 76