Oracle Application Express (APEX) 4.2.6, released in September 2014, was a significant maintenance update that focused on refining the responsive design and mobile capabilities introduced in the 4.2 series. While it has been officially desupported by Oracle since October 2017, it remains a critical version for legacy application maintenance and specific database migrations. How to Download Oracle APEX 4.2.6
It is compatible with Oracle Database 10g (10.2.0.4) and later, including early versions of Oracle 12c. Installation & System Requirements oracle apex 4.2 6 download
Understanding Oracle APEX 4.2.6: Download and Installation Guide Oracle Application Express (APEX) 4