File Extension OGNC File Format Web Page Source Code OGNC stands for Web Page Source Code. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question Domino web query returns incomplete result set Mainframe quality assurance testing tools Can I call upon the username of someone logged into the pc, and use it in a web link?