I’ve interpreted the name as a playful, tech-adjacent, or educational sandbox environment (given the "prep" in the domain and the "duck" reference, which often points to DuckDNS or dynamic DNS services).

Duck.quackprep.net operates as a domain for unblocked games and proxy services, frequently used to bypass school or workplace network filters. These sites are often unstable and carry security risks, including malware exposure and policy violations. For reliable and secure alternatives, users are encouraged to explore established educational platforms.

The platform operates across several domains and subdomains, including and quackprep.org , to provide diverse services tailored to students:

com/">QuackPrep database or find a currently available? Quackprep Unblocked Games

Diving into duck.quackprep.net : What’s in a (Sub)domain?