The PDNS was first launched in 2017 and protects against Domain Name System (DNS) misuse and cyber threats like malware. It has been freely available to organisations like central government, local authorities, and devolved administrations for several years. Organisations that can now sign up to PDNS for Schools are local authorities or eligible public sector networks from the devolved administrations of the UK that provide DNS to their schools and local authorities in England that provide DNS to their maintained schools.